GB/T 5596-1996 Ceramic dielectric materials for capacitors

This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of ceramic dielectric materials for capacitors. This standard is applicable to the manufacture of ceramic dielectric materials for capacitors. GB/T 5596-1996 Ceramic dielectric materials for capacitors GB/T5596-1996 Standard download decompression password: www.bzxz.net

CB/T5596—1996
This standard is the first revised version of the national standard GB5596—85 "Ceramic dielectric materials for capacitors". This standard supplements the classification of ceramic dielectric materials for capacitors. In order to adapt to the rapid development of ceramic dielectric materials, three types of ceramic dielectric materials are added, and the dielectric constant (dielectric band number) and dielectric loss angle cut value of ceramic materials are also expanded and revised. In addition, the physical properties of ceramic materials are not included in the original standard. Considering the close relationship between the physical properties of ceramic materials and the electrical properties of capacitors, the physical properties table of ceramic materials is added, and other performance parameters are also revised. From the date of implementation of this standard, GB5596—85 will be replaced at the same time. This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization and Chemical Research Institute of the Ministry of Electronics Industry. The drafting units of this standard are: State-owned No. 78 Factory and the Standardization Research Institute of the Ministry of Electronics Industry. The main drafters of this standard are: Wang Jiazeng, Qiu Yuexia, and Tu Yugong. This standard was first issued in November 1985 and first subscribed in May 1997. 1 Scope
National Standard of the People's Republic of China
Ceramic Dielectric Materials Used in Capacitors
Ceramic Dielectric Materials Used Por CapacitorsGB/T 5596—1996
Replaces G 5596—85
This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of ceramic dielectric materials used in capacitors.
This standard is applicable to the manufacture of ceramic dielectric materials used in capacitors (hereinafter referred to as capacitor ceramics). 2 Referenced Standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB2421-89 General rules for basic environmental testing procedures for electrical and electronic products GB5594.3-85 Test method for performance of structural ceramic materials for electronic components Test method for average linear expansion coefficient GB5594.4-85 Test method for performance of structural ceramic materials for electronic components Test method for dielectric loss tangent value by force method GB5591.5-85
Test method for performance of structural ceramic materials for electronic components Test method for volume resistivity GB5595-85 Classification, name and brand naming method of ceramic dielectric materials for electroplating devices GB6524-86 Determination of particle size distribution of metal powders - Light transmission method GB9530-88 Terminology of electronic ceramics
GB/T 1339092 Determination of specific surface area of ​​metal powders - Chlorine adsorption method General requirements for chemical analysis methods of radio ceramic materials SJ/Z 1463-79
3 Definitions
The definitions used in this standard conform to GB 9530 regulations. 4 Requirements
4.1 Product classification
Capacitor ceramics are divided into = categories according to their use and performance. The naming method of their names and brands can be found in GB5595. Category
High-end capacitor ceramics
Low-value capacitor ceramics
Semiconductor capacitor ceramics
4.2 The electrical properties, mechanical properties and physical properties of capacitor ceramics shall meet the requirements specified in Table 1 and Table 2. Approved by the State Technical Supervision Bureau on September 9, 1996, 19970501 for implementation
GB/T5596—1996
Using frequency converter
Controlling high voltage and other voltage
For the purpose of selecting the appropriate circuits
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Controlling voltage and other voltage
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CB/T5596-1996
Electronic
Ultrafine particles
Quantity size (μm)
Capacitor temperature coefficient tolerance code
Capacitance temperature coefficient tolerance value
(X10*/℃)
GB/T5596—1996
Physical properties
Specific surface area
Content
26 000
≥5 ofl
With and without DC voltage applied, the maximum change rate of capacitance measured relative to +20℃ within the category temperature range of porcelain material
Without DC voltage applied
120/28
+20/—55
+30/-80
113/85
“X\ indicates the preferred value,
“— \Indicates not in production,
Applied rated true voltage
+20/-30
+20/40
+22/—70
+30/—90
+15/—1
+15/—25
Oil particles
Particle size (μum)
Specific attenuation
25 600
—1000
Special temperature range and corresponding effect code-55/125
-55/85
—40/85
-25/85
--10/85
Porcelain material type
GB/T 5596-. 1996
When no DC voltage is applied, the maximum change rate of the electric wear measured at 20℃ within the category temperature range relative to the maximum change rate of the electric wear measured at 20℃ in %
No DC voltage is applied
+20/-30
+22/—56
+30/—80
—40/—25
“X\ indicates the preferred value:
\ indicates that it is not produced.
5 Test method
Apply rated DC voltage||tt| |+10/15
120/30
+20/-40
+22/—70
+30/—90
—40/—35
—55/125
Category temperature range and corresponding numerical code -55/85
—40/85
-25/85
5.1 Unless otherwise specified in this standard, all tests on capacitor ceramics shall be carried out under the standard atmospheric conditions for testing specified in GB 2421 (temperature 15℃～35C, relative humidity 45%～75%, air pressure 86kPa~106kPa). Standard atmospheric conditions for arbitration tests: temperature 20℃±1℃, relative humidity 63%～67%, air pressure 86kPa～106kPa. 5.2 When measuring the electrical properties of capacitor ceramics, a complete silver layer should be applied on both sides of the sample as electrodes by the sintering method. 5.3 When measuring the permittivity (dielectric constant) of the sample, use any method that can ensure that the test voltage is: Class 1 ceramics not less than 5V, Class 2 ceramics 1V + 0.2V, Class 3 ceramics A, BC groups 1V ± 0.2V, D, E, F, G groups 0.3V ± 0.2V and the measurement error is not greater than ± 0.2%. Test frequency: Class 1 ceramics are 1M1 to 10.5MHz: Class 2 and 3 ceramics are 1 000 Hz ± 200 Hz. The dielectric constant is calculated by the following formula: C#
E = 14+4
Wherein: E——dielectric constant; C——capacitance of the sample, PF;
h dielectric thickness, cm
)——electrode diameter cm.
5. 4 When measuring the capacitance temperature coefficient α of Class 1 capacitor ceramic, the test error is 0.1 MHz.~5 MIIz, and the test error for A, B, C, H, N, L, P, R groups should not be greater than ±(0.05u+2X10-6/℃), and for other groups should not be greater than ±(0.5 α.+20X10h/),During the test, the difference between the high temperature and the room temperature is not less than 50. The temperature coefficient of capacitance is calculated according to the following formula: C, - C,
Wherein, temperature coefficient of capacitance, 1/C;
C, capacitance at high temperature, pF;
C, capacitance at room temperature, pF,
A--difference between high temperature and temperature, C.
GB/T 5596-1996
5.5 When measuring the capacitance change rate of Class 2 and Class 3 porcelain materials with temperature, the sample should be placed in a heating box and a negative temperature box in turn. The temperature change range is shown in Table 4 and Table 5. After reaching the test temperature, the insulation time is not less than 15 minutes, and then the measurement is made in the box. The test voltage and test error shall comply with the provisions of Article 5.3 of this standard. The capacitance change rate with temperature shall be calculated according to the following formula: C.-G.100%
Capacitance change rate with temperature, %.
Where: C
C, — Capacitance at temperature -55℃±2℃, -40℃±2℃, —25℃±2℃, —10+2V, 125℃12℃, 85℃±2℃ is pF
- Capacitance at temperature 20℃±2℃, pF. i
5.6 When measuring the dielectric loss tangent, for Class 2.3 ceramics, a method with an error of no more than 0.1tan is used, and the base frequency is 1 000 Hz±200 Hz.
For Class 1 ceramics, a method with a test error of no more than ±(0.1tan + 0,0002) is used, and the test frequency is (1±0.5)MHz. Where, tand is the dielectric loss tangent of the sample. The test voltage is as specified in Article 5.3. Before the test, the sample should be carefully cleaned. When measuring the dielectric loss tangent after being damp, the sample is put into distilled water and boiled for 1 hour, then cooled in water to 20°C ± 5°C and taken out, and the sample is wiped dry with filter paper or clean gauze, and then placed in normal climate for 2 hours and measured immediately. The high-temperature dielectric loss tangent of capacitor porcelain is measured according to GB5594.4. The measurement temperature and technical requirements are as specified in Table 1
5.7 The volume resistivity of the sample is measured according to GB5594.5. 5.8 When measuring the insulation strength of the sample, it should be avoided in DC or AC high-voltage equipment I:. High-voltage equipment should ensure that the electric energy rises evenly, and its speed is not more than 1000V/s, and the measurement error of its voltage should be less than 10.5%. The measurement error of the breakdown thickness of the sample is 10.02mml. The sample should be tested for insulation strength in insulating oil. The dielectric strength of the specimen is calculated by the following formula:
Where: E——Dielectric strength, kV/tntn; U——Breakdown voltage of the specimen, kV
h——Thickness of the specimen at the breakdown point, rm.
5.9 When measuring the bending strength of the specimen, any method with a measurement error of no more than ±10% may be used. The distance between the support points during measurement is 5 cm; the speed of load increase is no more than 40 N/s. The static bending strength is calculated by the following formula:
Cylindrical section specimen:
Breaking load, N:
1.——Distance between the support points, cm
Diameter of the broken section of the specimen. cm.
Square section specimen:
In the formula: a—
Steady-state bending strength, N/em
-Breaking load, N:
Support distance, ctmt;
Width of the specimen breaking section, cm;
h---—Thickness of the specimen breaking section, c.
GB/T 5596—1996
Juice: When using a square section test, the test data is too low. When assessing, the test data should be increased by Ⅲ25% to make the test results of the square section and the round section consistent.
5.1D The linear expansion coefficient of the measured specimen is carried out according to GH5594.3. Measuring temperature: 20～100℃. 5.11 The rate of change of the positive capacitance of the sample with true current is determined by measuring the capacitance of the sample in the absence of a DC field and when a DC field of 500V/mm is applied simultaneously under a weak AC electric field with a frequency of 800Hz~1200Hz (the sample end is also pressurized according to the provisions of Article 5.3). The schematic diagram of the circuit is shown in Figure 1.
connected to the measuring instrument
connected to an adjustable DC voltage source
S·converter; C, test sample; Ci: fixed capacitor (16μF, +10K); C: fixed capacitor (2 uF.-10%), R, a fixed resistor (400kn~500kn); V—DC voltmeter Figure 1
The rate of change of capacitance with voltage is calculated according to the following formula: CeCh.100%
In the formula: ——rate of change of capacitance with voltage, %; C.
Cv——The capacitance of the sample under a DC electric field of 500V/m2·pF; C The capacitance of the sample without a DC electric field, pF5.12 The particle size of the ceramic material shall be measured according to the method specified in GB6524. 5.13 The specific surface area of ​​the ceramic material shall be measured according to the method specified in GB/T13390. 6 Inspection rules
6.1 Inspection classification
The inspection of capacitor ceramic materials is divided into factory inspection (or delivery inspection) and type inspection (or routine test). 6.1. 1 Factory inspection
The inspection items are: dielectric constant (dielectric constant), dielectric loss tangent, volume resistivity and capacitor temperature coefficient or capacitance change rate in Table 1, insulation strength and physical properties specified in Table 2. The shape, size and quantity of the sample shall comply with the provisions of Table 6. The inspection batch consists of ceramic materials produced continuously under the same formula and the same working conditions. Test items: Permittivity, loss factor, tangent value and capacitance, rate of change with temperature, capacitance temperature, volume resistivity, dielectric strength, static resistivity, linear expansion, capacitance rate of change with temperature t||Number of samples
6.1.2 Type test
CB/T5596-1996
Shape of sample
Below 30 25-35
20 to 5-25
1-1.5Silver layer
Below 30
30~150
Above 150
1.5±0. 2
Image form
a, the shape and size of the sample shall comply with the provisions of item 1 of this table
535±5
50--70
GB/T5596--1996
To determine whether the capacitor ceramics meet the requirements of this standard, the manufacturer shall conduct type inspection according to the provisions of Table 1 and Table 2. Type inspection shall not be less than "times" per year. When the manufacturing process and raw materials undergo major changes, type inspection shall also be carried out. The shape, size and quantity of the samples shall comply with the provisions of Table 6. 6.2 Judgment rules
During the test, if the indicators of all the samples meet the provisions of Table 1 and Table 2, the batch of capacitor ceramics is qualified. During the test, if a sample is found to be unqualified in any of the above items, two samples of the same number shall be made from the same batch of ceramics and re-tested according to the unqualified items. If the re-test is still unqualified, the batch of ceramics is unqualified. 7 Marking, labeling, and packaging
7.1 Marking
The outer packaging of capacitor porcelain should have firm markings, including: manufacturer name, product name, trademark, product model, manufacturing date, etc.
There should be a product label in the inner plastic film packaging. Its contents include: manufacturer name, product name, trademark, product model, manufacturing date, and main parameters of the product, etc.
7.2 Packaging
Capacitor porcelain is packaged with woven bags with plastic film inside, and the weight of each bag does not exceed 25kg. 7.3 Transportation
Capacitor porcelain can be transported by any means of transportation, and should be protected from rain during transportation. 7.4 Storage
Capacitor porcelain should be stored in a ventilated, dry, and clean warehouse, and stored separately from other powder materials..com5 When measuring the capacitance change rate of Class 2 and Class 3 porcelain materials with temperature, the sample should be placed in a heating box and a negative temperature box in turn. The temperature change range is shown in Table 4 and Table 5. After reaching the test temperature, the insulation time is not less than 15 minutes, and then the measurement is made in the box. The test voltage and test error shall comply with the provisions of Article 5.3 of this standard. The capacitance change rate with temperature shall be calculated according to the following formula: C.-G.100%
Capacitance change rate with temperature,%.
Where: C
C,—The capacitance when the temperature is -55℃±2℃, -40℃±2℃, -25℃±2℃, -10+2V, 125℃12℃, 85℃±2℃ is·pF
-The capacitance when the temperature is 20℃±2℃, pF. i
5.6 When measuring the dielectric loss tangent value, the method with an error of no more than 0.1tan is used for Class 2.3 porcelain materials, and the basic frequency of the measurement is 1 000 Hz ± 200 Hz.
For Class 1 porcelain materials, the method with a test error of no more than ± (0.1tan + 0,0002) is used, and the test frequency is (1 ± 0.5) MHz. Where tand is the dielectric loss tangent value of the sample. The test voltage is in accordance with the provisions of Article 5.3. Before the test, the sample should be carefully cleaned. When measuring the dielectric loss tangent value after being damp, the sample is placed in distilled water and boiled for 1 hour, then cooled to 20°C ± 5°C in water and taken out, and the sample is wiped dry with filter paper or clean gauze, and then placed in normal climate for 2 hours and measured immediately. The high-temperature dielectric loss tangent value of capacitor porcelain is measured in accordance with GB5594.4. The measurement temperature and technical requirements are as specified in Table 1.
5.7 The volume resistivity of the sample is measured in accordance with GB5594.5. 5.8 When measuring the insulation strength of the sample, it should be avoided in DC or AC high-voltage equipment. The high-voltage equipment should ensure that the voltage can be evenly increased, and its speed is not more than 1000V/s, and the measurement error of its voltage should be less than 10%. The measurement error of the breakdown thickness of the sample is 10.02mml. The sample should be tested for insulation strength in insulating oil. The insulation strength of the sample is calculated by the following formula:
Where: E——insulation strength, kV/tntn; U——sample breakdown voltage, kV
h——sample breakdown thickness, rm.
5.9 When measuring the bending strength of the sample, any method with a measurement error of less than 10% can be used. The distance between the fulcrums during measurement is 5 cm; the speed of load increase is not more than 40 N/s. The static bending strength is calculated according to the following formula:
Cylindrical section specimen:
During combat:
Static bending strength, N/cm\,
Breaking load, N:
1.——Distance between support points, cm
Diameter of breaking surface of specimen.cm.
Square section specimen:
In the formula: a—
Steady-state bending strength, N/em
-Breaking load, N:
Support distance, ctmt;
Width of the specimen breaking section, cm;
h---—Thickness of the specimen breaking section, c.
GB/T 5596—1996
Juice: When using a square section test, the test data is too low. When assessing, the test data should be increased by Ⅲ25% to make the test results of the square section and the round section consistent.
5.1D The linear expansion coefficient of the measured specimen is carried out according to GH5594.3. Measuring temperature: 20～100℃. 5.11 The rate of change of the positive capacitance of the sample with true current is determined by measuring the capacitance of the sample in the absence of a DC field and when a DC field of 500V/mm is applied simultaneously under a weak AC electric field with a frequency of 800Hz~1200Hz (the sample end is also pressurized according to the provisions of Article 5.3). The schematic diagram of the circuit is shown in Figure 1.
connected to the measuring instrument
connected to an adjustable DC voltage source
S·converter; C, test sample; Ci: fixed capacitor (16μF, +10K); C: fixed capacitor (2 uF.-10%), R, a fixed resistor (400kn~500kn); V—DC voltmeter Figure 1
The rate of change of capacitance with voltage is calculated according to the following formula: CeCh.100%bzxZ.net
In the formula: ——rate of change of capacitance with voltage, %; C.
Cv——The capacitance of the sample under a DC electric field of 500V/m2·pF; C The capacitance of the sample without a DC electric field, pF5.12 The particle size of the ceramic material shall be measured according to the method specified in GB6524. 5.13 The specific surface area of ​​the ceramic material shall be measured according to the method specified in GB/T13390. 6 Inspection rules
6.1 Inspection classification
The inspection of capacitor ceramic materials is divided into factory inspection (or delivery inspection) and type inspection (or routine test). 6.1. 1 Factory inspection
The inspection items are: dielectric constant (dielectric constant), dielectric loss tangent, volume resistivity and capacitor temperature coefficient or capacitance change rate in Table 1, insulation strength and physical properties specified in Table 2. The shape, size and quantity of the sample shall comply with the provisions of Table 6. The inspection batch consists of ceramic materials produced continuously under the same formula and the same working conditions. Test items: Permittivity, loss factor, tangent value and capacitance, rate of change with temperature, capacitance temperature, volume resistivity, dielectric strength, static resistivity, linear expansion, capacitance rate of change with temperature t||Number of samples
6.1.2 Type test
CB/T5596-1996
Shape of sample
Below 30 25-35
20 to 5-25
1-1.5Silver layer
Below 30
30~150
Above 150
1.5±0. 2
Image form
a, the shape and size of the sample shall comply with the provisions of item 1 of this table
535±5
50--70
GB/T5596--1996
To determine whether the capacitor ceramics meet the requirements of this standard, the manufacturer shall conduct type inspection according to the provisions of Table 1 and Table 2. Type inspection shall not be less than "times" per year. When the manufacturing process and raw materials undergo major changes, type inspection shall also be carried out. The shape, size and quantity of the samples shall comply with the provisions of Table 6. 6.2 Judgment rules
During the test, if the indicators of all the samples meet the provisions of Table 1 and Table 2, the batch of capacitor ceramics is qualified. During the test, if a sample is found to be unqualified in any of the above items, two samples of the same number shall be made from the same batch of ceramics and re-tested according to the unqualified items. If the re-test is still unqualified, the batch of ceramics is unqualified. 7 Marking, labeling, and packaging
7.1 Marking
The outer packaging of capacitor porcelain should have firm markings, including: manufacturer name, product name, trademark, product model, manufacturing date, etc.
There should be a product label in the inner plastic film packaging. Its contents include: manufacturer name, product name, trademark, product model, manufacturing date, and main parameters of the product, etc.
7.2 Packaging
Capacitor porcelain is packaged with woven bags with plastic film inside, and the weight of each bag does not exceed 25kg. 7.3 Transportation
Capacitor porcelain can be transported by any means of transportation, and should be protected from rain during transportation. 7.4 Storage
Capacitor porcelain should be stored in a ventilated, dry, and clean warehouse, and stored separately from other powder materials..com5 When measuring the capacitance change rate of Class 2 and Class 3 porcelain materials with temperature, the sample should be placed in a heating box and a negative temperature box in turn. The temperature change range is shown in Table 4 and Table 5. After reaching the test temperature, the insulation time is not less than 15 minutes, and then the measurement is made in the box. The test voltage and test error shall comply with the provisions of Article 5.3 of this standard. The capacitance change rate with temperature shall be calculated according to the following formula: C.-G.100%
Capacitance change rate with temperature,%.
Where: C
C,—The capacitance when the temperature is -55℃±2℃, -40℃±2℃, -25℃±2℃, -10+2V, 125℃12℃, 85℃±2℃ is·pF
-The capacitance when the temperature is 20℃±2℃, pF. i
5.6 When measuring the dielectric loss tangent value, the method with an error of no more than 0.1tan is used for Class 2.3 porcelain materials, and the basic frequency of the measurement is 1 000 Hz ± 200 Hz.
For Class 1 porcelain materials, the method with a test error of no more than ± (0.1tan + 0,0002) is used, and the test frequency is (1 ± 0.5) MHz. Where tand is the dielectric loss tangent value of the sample. The test voltage is in accordance with the provisions of Article 5.3. Before the test, the sample should be carefully cleaned. When measuring the dielectric loss tangent value after being damp, the sample is placed in distilled water and boiled for 1 hour, then cooled to 20°C ± 5°C in water and taken out, and the sample is wiped dry with filter paper or clean gauze, and then placed in normal climate for 2 hours and measured immediately. The high-temperature dielectric loss tangent value of capacitor porcelain is measured in accordance with GB5594.4. The measurement temperature and technical requirements are as specified in Table 1.
5.7 The volume resistivity of the sample is measured in accordance with GB5594.5. 5.8 When measuring the insulation strength of the sample, it should be avoided in DC or AC high-voltage equipment. The high-voltage equipment should ensure that the voltage can be evenly increased, and its speed is not more than 1000V/s, and the measurement error of its voltage should be less than 10%. The measurement error of the breakdown thickness of the sample is 10.02mml. The sample should be tested for insulation strength in insulating oil. The insulation strength of the sample is calculated by the following formula:
Where: E——insulation strength, kV/tntn; U——sample breakdown voltage, kV
h——sample breakdown thickness, rm.
5.9 When measuring the bending strength of the sample, any method with a measurement error of less than 10% can be used. The distance between the fulcrums during measurement is 5 cm; the speed of load increase is not more than 40 N/s. The static bending strength is calculated according to the following formula:
Cylindrical section specimen:
During combat:
Static bending strength, N/cm\,
Breaking load, N:
1.——Distance between support points, cm
Diameter of breaking surface of specimen.cm.
Square section specimen:
In the formula: a—
Steady-state bending strength, N/em
-Breaking load, N:
Support distance, ctmt;
Width of the specimen breaking section, cm;
h---—Thickness of the specimen breaking section, c.
GB/T 5596—1996
Juice: When using a square section test, the test data is too low. When assessing, the test data should be increased by Ⅲ25% to make the test results of the square section and the round section consistent.
5.1D The linear expansion coefficient of the measured specimen is carried out according to GH5594.3. Measuring temperature: 20～100℃. 5.11 The rate of change of the positive capacitance of the sample with true current is determined by measuring the capacitance of the sample in the absence of a DC field and when a DC field of 500V/mm is applied simultaneously under a weak AC electric field with a frequency of 800Hz~1200Hz (the sample end is also pressurized according to the provisions of Article 5.3). The schematic diagram of the circuit is shown in Figure 1.
connected to the measuring instrument
connected to an adjustable DC voltage source
S·converter; C, test sample; Ci: fixed capacitor (16μF, +10K); C: fixed capacitor (2 uF.-10%), R, a fixed resistor (400kn~500kn); V—DC voltmeter Figure 1
The rate of change of capacitance with voltage is calculated according to the following formula: CeCh.100%
In the formula: ——rate of change of capacitance with voltage, %; C.
Cv——The capacitance of the sample under a DC electric field of 500V/m2·pF; C The capacitance of the sample without a DC electric field, pF5.12 The particle size of the ceramic material shall be measured according to the method specified in GB6524. 5.13 The specific surface area of ​​the ceramic material shall be measured according to the method specified in GB/T13390. 6 Inspection rules
6.1 Inspection classification
The inspection of capacitor ceramic materials is divided into factory inspection (or delivery inspection) and type inspection (or routine test). 6.1. 1 Factory inspection
The inspection items are: dielectric constant (dielectric constant), dielectric loss tangent, volume resistivity and capacitor temperature coefficient or capacitance change rate in Table 1, insulation strength and physical properties specified in Table 2. The shape, size and quantity of the sample shall comply with the provisions of Table 6. The inspection batch consists of ceramic materials produced continuously under the same formula and the same working conditions. Test items: Permittivity, loss factor, tangent value and capacitance, rate of change with temperature, capacitance temperature, volume resistivity, dielectric strength, static resistivity, linear expansion, capacitance rate of change with temperature t||Number of samples
6.1.2 Type test
CB/T5596-1996
Shape of sample
Below 30 25-35
20 to 5-25
1-1.5Silver layer
Below 30
30~150
Above 150
1.5±0. 2
Image form
a, the shape and size of the sample shall comply with the provisions of item 1 of this table
535±5
50--70
GB/T5596--1996
To determine whether the capacitor ceramics meet the requirements of this standard, the manufacturer shall conduct type inspection according to the provisions of Table 1 and Table 2. Type inspection shall not be less than "times" per year. When the manufacturing process and raw materials undergo major changes, type inspection shall also be carried out. The shape, size and quantity of the samples shall comply with the provisions of Table 6. 6.2 Judgment rules
During the test, if the indicators of all the samples meet the provisions of Table 1 and Table 2, the batch of capacitor ceramics is qualified. During the test, if a sample is found to be unqualified in any of the above items, two samples of the same number shall be made from the same batch of ceramics and re-tested according to the unqualified items. If the re-test is still unqualified, the batch of ceramics is unqualified. 7 Marking, labeling, and packaging
7.1 Marking
The outer packaging of capacitor porcelain should have firm markings, including: manufacturer name, product name, trademark, product model, manufacturing date, etc.
There should be a product label in the inner plastic film packaging. Its contents include: manufacturer name, product name, trademark, product model, manufacturing date, and main parameters of the product, etc.
7.2 Packaging
Capacitor porcelain is packaged with woven bags with plastic film inside, and the weight of each bag does not exceed 25kg. 7.3 Transportation
Capacitor porcelain can be transported by any means of transportation, and should be protected from rain during transportation. 7.4 Storage
Capacitor porcelain should be stored in a ventilated, dry, and clean warehouse, and stored separately from other powder materials..com3. Before the test, the sample should be cleaned carefully. When measuring the dielectric loss tangent after being damp, the sample is put into distilled water and boiled for 1 hour, then cooled to 20°C ± 5°C in water and taken out, and the sample is wiped dry with filter paper or clean gauze, and then placed in normal climate for 2 hours and measured immediately. The high-temperature dielectric loss tangent of capacitor porcelain is measured in accordance with GB5594.4. The measurement temperature and technical requirements are as specified in Table 1
5.7 The volume resistivity of the sample is measured in accordance with GB5594.5. 5.8 When measuring the insulation strength of the sample, it should be avoided in DC or AC high-voltage equipment I:. The high-voltage equipment should ensure that the electric energy rises evenly, and its speed is not more than 1000V/s, and the measurement error of its voltage should be less than 10.5%. The measurement error of the breakdown thickness of the sample is 10.02mml. The sample should be tested for insulation strength in insulating oil. The dielectric strength of the specimen is calculated by the following formula:
Where: E——Dielectric strength, kV/tntn; U——Breakdown voltage of the specimen, kV
h——Thickness of the specimen at the breakdown point, rm.
5.9 When measuring the bending strength of the specimen, any method with a measurement error of no more than ±10% may be used. The distance between the support points during measurement is 5 cm; the speed of load increase is no more than 40 N/s. The static bending strength is calculated by the following formula:
Cylindrical section specimen:
Breaking load, N:
1.——Distance between the support points, cm
Diameter of the broken section of the specimen. cm.
Square section specimen:
In the formula: a—
Steady-state bending strength, N/em
-Breaking load, N:
Support distance, ctmt;
Width of the specimen breaking section, cm;
h---—Thickness of the specimen breaking section, c.
GB/T 5596—1996
Juice: When using a square section test, the test data is too low. When assessing, the test data should be increased by Ⅲ25% to make the test results of the square section and the round section consistent.
5.1D The linear expansion coefficient of the measured specimen is carried out according to GH5594.3. Measuring temperature: 20～100℃. 5.11 The rate of change of the positive capacitance of the sample with true current is determined by measuring the capacitance of the sample in the absence of a DC field and when a DC field of 500V/mm is applied simultaneously under a weak AC electric field with a frequency of 800Hz~1200Hz (the sample end is also pressurized according to the provisions of Article 5.3). The schematic diagram of the circuit is shown in Figure 1.
connected to the measuring instrument
connected to an adjustable DC voltage source
S·converter; C, test sample; Ci: fixed capacitor (16μF, +10K); C: fixed capacitor (2 uF.-10%), R, a fixed resistor (400kn~500kn); V—DC voltmeter Figure 1
The rate of change of capacitance with voltage is calculated according to the following formula: CeCh.100%
In the formula: ——rate of change of capacitance with voltage, %; C.
Cv——The capacitance of the sample under a DC electric field of 500V/m2·pF; C The capacitance of the sample without a DC electric field, pF5.12 The particle size of the ceramic material shall be measured according to the method specified in GB6524. 5.13 The specific surface area of ​​the ceramic material shall be measured according to the method specified in GB/T13390. 6 Inspection rules
6.1 Inspection classification
The inspection of capacitor ceramic materials is divided into factory inspection (or delivery inspection) and type inspection (or routine test). 6.1. 1 Factory inspection
The inspection items are: dielectric constant (dielectric constant), dielectric loss tangent, volume resistivity and capacitor temperature coefficient or capacitance change rate in Table 1, insulation strength and physical properties specified in Table 2. The shape, size and quantity of the sample shall comply with the provisions of Table 6. The inspection batch consists of ceramic materials produced continuously under the same formula and the same working conditions. Test items: Permittivity, loss factor, tangent value and capacitance, rate of change with temperature, capacitance temperature, volume resistivity, dielectric strength, static resistivity, linear expansion, capacitance rate of change with temperature t||Number of samples
6.1.2 Type test
CB/T5596-1996
Shape of sample
Below 30 25-35
20 to 5-25
1-1.5Silver layer
Below 30
30~150
Above 150
1.5±0. 2
Image form
a, the shape and size of the sample shall comply with the provisions of item 1 of this table
535±5
50--70
GB/T5596--1996
To determine whether the capacitor ceramics meet the requirements of this standard, the manufacturer shall conduct type inspection according to the provisions of Table 1 and Table 2. Type inspection shall not be less than "times" per year. When the manufacturing process and raw materials undergo major changes, type inspection shall also be carried out. The shape, size and quantity of the samples shall comply with the provisions of Table 6. 6.2 Judgment rules
During the test, if the indicators of all the samples meet the provisions of Table 1 and Table 2, the batch of capacitor ceramics is qualified. During the test, if a sample is found to be unqualified in any of the above items, two samples of the same number shall be made from the same batch of ceramics and re-tested according to the unqualified items. If the re-test is still unqualified, the batch of ceramics is unqualified. 7 Marking, labeling, and packaging
7.1 Marking
The outer packaging of capacitor porcelain should have firm markings, including: manufacturer name, product name, trademark, product model, manufacturing date, etc.
There should be a product label in the inner plastic film packaging. Its contents include: manufacturer name, product name, trademark, product model, manufacturing date, and main parameters of the product, etc.
7.2 Packaging
Capacitor porcelain is packaged with woven bags with plastic film inside, and the weight of each bag does not exceed 25kg. 7.3 Transportation
Capacitor porcelain can be transported by any means of transportation, and should be protected from rain during transportation. 7.4 Storage
Capacitor porcelain should be stored in a ventilated, dry, and clean warehouse, and stored separately from other powder materials..com3. Before the test, the sample should be cleaned carefully. When measuring the dielectric loss tangent after being damp, the sample is put into distilled water and boiled for 1 hour, then cooled to 20°C ± 5°C in water and taken out, and the sample is wiped dry with filter paper or clean gauze, and then placed in normal climate for 2 hours and measured immediately. The high-temperature dielectric loss tangent of capacitor porcelain is measured in accordance with GB5594.4. The measurement temperature and technical requirements are as specified in Table 1
5.7 The volume resistivity of the sample is measured in accordance with GB5594.5. 5.8 When measuring the insulation strength of the sample, it should be avoided in DC or AC high-voltage equipment I:. The high-voltage equipment should ensure that the electric energy rises evenly, and its speed is not more than 1000V/s, and the measurement error of its voltage should be less than 10.5%. The measurement error of the breakdown thickness of the sample is 10.02mml. The sample should be tested for insulation strength in insulating oil. The dielectric strength of the specimen is calculated by the following formula:
Where: E——Dielectric strength, kV/tntn; U——Breakdown voltage of the specimen, kV
h——Thickness of the specimen at the breakdown point, rm.
5.9 When measuring the bending strength of the specimen, any method with a measurement error of no more than ±10% may be used. The distance between the support points during measurement is 5 cm; the speed of load increase is no more than 40 N/s. The static bending strength is calculated by the following formula:
Cylindrical section specimen:
Breaking load, N:
1.——Distance between the support points, cm
Diameter of the broken section of the specimen. cm.
Square section specimen:
In the formula: a—
Steady-state bending strength, N/em
-Breaking load, N:
Support distance, ctmt;
Width of the specimen breaking section, cm;
h---—Thickness of the specimen breaking section, c.
GB/T 5596—1996
Juice: When using a square section test, the test data is too low. When assessing, the test data should be increased by Ⅲ25% to make the test results of the square section and the round section consistent.
5.1D The linear expansion coefficient of the measured specimen is carried out according to GH5594.3. Measuring temperature: 20～100℃. 5.11 The rate of change of the positive capacitance of the sample with true current is determined by measuring the capacitance of the sample in the absence of a DC field and when a DC field of 500V/mm is applied simultaneously under a weak AC electric field with a frequency of 800Hz~1200Hz (the sample end is also pressurized according to the provisions of Article 5.3). The schematic diagram of the circuit is shown in Figure 1.
connected to the measuring instrument
connected to an adjustable DC voltage source
S·converter; C, test sample; Ci: fixed capacitor (16μF, +10K); C: fixed capacitor (2 uF.-10%), R, a fixed resistor (400kn~500kn); V—DC voltmeter Figure 1
The rate of change of capacitance with voltage is calculated according to the following formula: CeCh.100%
In the formula: ——rate of change of capacitance with voltage, %; C.
Cv——The capacitance of the sample under a DC electric field of 500V/m2·pF; C The capacitance of the sample without a DC electric field, pF5.12 The particle size of the ceramic material shall be measured according to the method specified in GB6524. 5.13 The specific surface area of ​​the ceramic material shall be measured according to the method specified in GB/T13390. 6 Inspection rules
6.1 Inspection classification
The inspection of capacitor ceramic materials is divided into factory inspection (or delivery inspection) and type inspection (or routine test). 6.1. 1 Factory inspection
The inspection items are: dielectric constant (dielectric constant), dielectric loss tangent, volume resistivity and capacitor temperature coefficient or capacitance change rate in Table 1, insulation strength and physical properties specified in Table 2. The shape, size and quantity of the sample shall comply with the provisions of Table 6. The inspection batch consists of ceramic materials produced continuously under the same formula and the same working conditions. Test items: Permittivity, loss factor, tangent value and capacitance, rate of change with temperature, capacitance temperature, volume resistivity, dielectric strength, static resistivity, linear expansion, capacitance rate of change with temperature t||Number of samples
6.1.2 Type test
CB/T5596-1996
Shape of sample
Below 30 25-35
20 to 5-25
1-1.5Silver layer
Below 30
30~150
Above 150
1.5±0. 2
Image form
a, the shape and size of the sample shall comply with the provisions of item 1 of this table
535±5
50--70
GB/T5596--1996
To determine whether the capacitor ceramics meet the requirements of this standard, the manufacturer shall conduct type inspection according to the provisions of Table 1 and Table 2. Type inspection shall not be less than "times" per year. When the manufacturing process and raw materials undergo major changes, type inspection shall also be carried out. The shape, size and quantity of the samples shall comply with the provisions of Table 6. 6.2 Judgment rules
During the test, if the indicators of all the samples meet the provisions of Table 1 and Table 2, the batch of capacitor ceramics is qualified. During the test, if a sample is found to be unqualified in any of the above items, two samples of the same number shall be made from the same batch of ceramics and re-tested according to the unqualified items. If the re-test is still unqualified, the batch of ceramics is unqualified. 7 Marking, labeling, and packaging
7.1 Marking
The outer packaging of capacitor porcelain should have firm markings, including: manufacturer name, product name, trademark, product model, manufacturing date, etc.
There should be a product label in the inner plastic film packaging. Its contents include: manufacturer name, product name, trademark, product model, manufacturing date, and main parameters of the product, etc.
7.2 Packaging
Capacitor porcelain is packaged with woven bags with plastic film inside, and the weight of each bag does not exceed 25kg. 7.3 Transportation
Capacitor porcelain can be transported by any means of transportation, and should be protected from rain during transportation. 7.4 Storage
Capacitor porcelain should be stored in a ventilated, dry, and clean warehouse, and stored separately from other powder materials..com11 To measure the rate of change of the positive capacitance of the sample with true current, the capacitance of the sample is determined by measuring the capacitance of the sample in the absence of a DC field and when a DC field of 500V/mm is applied simultaneously under a weak AC electric field with a frequency of 800 Hz~1200 Hz (the sample end is also pressurized according to the provisions of Article 5.3). The schematic diagram of the circuit is shown in Figure 1.
Connected to measuring instrument
Connected to adjustable DC voltage source
S·converter; C, test sample; Ci fixed capacitor (16μF, +10K); C: fixed capacitor (2 uF.-10%), R, a fixed resistor (400 kn~500kn); V—DC voltmeter Figure 1
The rate of change of capacitance with voltage is calculated according to the following formula: CeCh.100%
In the formula: ——rate of change of capacitance with voltage, %; C.
Cv——The capacitance of the sample under a DC electric field of 500V/m2·pF; C The capacitance of the sample without a DC electric field, pF5.12 The particle size of the ceramic material shall be measured according to the method specified in GB6524. 5.13 The specific surface area of ​​the ceramic material shall be measured according to the method specified in GB/T13390. 6 Inspection rules
6.1 Inspection classification
The inspection of capacitor ceramic materials is divided into factory inspection (or delivery inspection) and type inspection (or routine test). 6.1. 1 Factory inspection
The inspection items are: dielectric constant (dielectric constant), dielectric loss tangent, volume resistivity and capacitor temperature coefficient or capacitance change rate in Table 1, insulation strength and physical properties specified in Table 2. The shape, size and quantity of the sample shall comply with the provisions of Table 6. The inspection batch consists of ceramic materials produced continuously under the same formula and the same working conditions. Test items: Permittivity, loss factor, tangent value and capacitance, rate of change with temperature, capacitance temperature, volume resistivity, dielectric strength, static resistivity, linear expansion, capacitance rate of change with temperature t||Number of samples
6.1.2 Type test
CB/T5596-1996
Shape of sample
Below 30 25-35
20 to 5-25
1-1.5Silver layer
Below 30
30~150
Above 150
1.5±0. 2
Image form
a, the shape and size of the sample shall comply with the provisions of item 1 of this table
535±5
50--70
GB/T5596--1996
To determine whether the capacitor ceramics meet the requirements of this standard, the manufacturer shall conduct type inspection according to the provisions of Table 1 and Table 2. Type inspection shall not be less than "times" per year. When the manufacturing process and raw materials undergo major changes, type inspection shall also be carried out. The shape, size and quantity of the samples shall comply with the provisions of Table 6. 6.2 Judgment rules
During the test, if the indicators of all the samples meet the provisions of Table 1 and Table 2, the batch of capacitor ceramics is qualified. During the test, if a sample is found to be unqualified in any of the above items, two samples of the same number shall be made from the same batch of ceramics and re-tested according to the unqualified items. If the re-test is still unqualified, the batch of ceramics is unqualified. 7 Marking, labeling, and packaging
7.1 Marking
The outer packaging of capacitor porcelain should have firm markings, including: manufacturer name, product name, trademark, product model, manufacturing date, etc.
There should be a product label in the inner plastic film packaging. Its contents include: manufacturer name, product name, trademark, product model, manufacturing date, and main parameters of the product, etc.
7.2 Packaging
Capacitor porcelain is packaged with woven bags with plastic film inside, and the weight of each bag does not exceed 25kg. 7.3 Transportation
Capacitor porcelain can be transported by any means of transportation, and should be protected from rain during transportation. 7.4 Storage
Capacitor porcelain should be stored in a ventilated, dry, and clean warehouse, and stored separately from other powder materials..com11 To measure the rate of change of the positive capacitance of the sample with true current, the capacitance of the sample is determined by measuring the capacitance of the sample in the absence of a DC field and when a DC field of 500V/mm is applied simultaneously under a weak AC electric field with a frequency of 800 Hz~1200 Hz (the sample end is also pressurized according to the provisions of Article 5.3). The schematic diagram of the circuit is shown in Figure 1.
Connected to measuring instrument
Connected to adjustable DC voltage source
S·converter; C, test sample; Ci fixed capacitor (16μF, +10K); C: fixed capacitor (2 uF.-10%), R, a fixed resistor (400 kn~500kn); V—DC voltmeter Figure 1
The rate of change of capacitance with voltage is calculated according to the following formula: CeCh.100%
In the formula: ——rate of change of capacitance with voltage, %; C.
Cv——The capacitance of the sample under a DC electric field of 500V/m2·pF; C The capacitance of the sample without a DC electric field, pF5.12 The particle size of the ceramic material shall be measured according to the method specified in GB6524. 5.13 The specific surface area of ​​the ceramic material shall be measured according to the method specified in GB/T13390. 6 Inspection rules
6.1 Inspection classification
The inspection of capacitor ceramic materials is divided into factory inspection (or delivery inspection) and type inspection (or routine test). 6.1. 1 Factory inspection
The inspection items are: dielectric constant (dielectric constant), dielectric loss tangent, volume resistivity and capacitor temperature coefficient or capacitance change rate in Table 1, insulation strength and physical properties specified in Table 2. The shape, size and quantity of the sample shall comply with the provisions of Table 6. The inspection batch consists of ceramic materials produced continuously under the same formula and the same working conditions. Test items: Permittivity, loss factor, tangent value and capacitance, rate of change with temperature, capacitance temperature, volume resistivity, dielectric strength, static resistivity, linear expansion, capacitance rate of change with temperature t||Number of samples
6.1.2 Type test
CB/T5596-1996
Shape of sample
Below 30 25-35
20 to 5-25
1-1.5Silver layer
Below 30
30~150
Above 150
1.5±0. 2
Image form
a, the shape and size of the sample shall comply with the provisions of item 1 of this table
535±5
50--70
GB/T5596--1996
To determine whether the capacitor ceramics meet the requirements of this standard, the manufacturer shall conduct type inspection according to the provisions of Table 1 and Table 2. Type inspection shall not be less than "times" per year. When the manufacturing process and raw materials undergo major changes, type inspection shall also be carried out. The shape, size and quantity of the samples shall comply with the provisions of Table 6. 6.2 Judgment rules
During the test, if the indicators of all the samples meet the provisions of Table 1 and Table 2, the batch of capacitor ceramics is qualified. During the test, if a sample is found to be unqualified in any of the above items, two samples of the same number shall be made from the same batch of ceramics and re-tested according to the unqualified items. If the re-test is still unqualified, the batch of ceramics is unqualified. 7 Marking, labeling, and packaging
7.1 Marking
The outer packaging of capacitor porcelain should have firm markings, including: manufacturer name, product name, trademark, product model, manufacturing date, etc.
There should be a product label in the inner plastic film packaging. Its contents include: manufacturer name, product name, trademark, product model, manufacturing date, and main parameters of the product, etc.
7.2 Packaging
Capacitor porcelain is packaged with woven bags with plastic film inside, and the weight of each bag does not exceed 25kg. 7.3 Transportation
Capacitor porcelain can be transported by any means of transportation, and should be protected from rain during transportation. 7.4 Storage
Capacitor porcelain should be stored in a ventilated, dry, and clean warehouse, and stored separately from other powder materials..com
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