GB 3389.8-1986 Test methods for properties of piezoelectric ceramic materials - Test of pyroelectric coefficient

This standard is applicable to the determination of the pyroelectric coefficient of piezoelectric ceramic materials. GB 3389.8-1986 Piezoelectric ceramic material performance test method Pyroelectric coefficient test GB3389.8-1986 Standard download decompression password: www.bzxz.net

UDC 621.315.612:621.317.08
National Standard of the People's Republic of China
GB 3389.8--86
Test methods for the propertiesof piezoelectric ceramics
Test for the pyroelectric coefficient1986-05-27Promulgated
National Bureau of Standards
Implementation on 1987-05-01
National Standard of the People's Republic of China
Test methods for the propertiesof piczoclcctric ceramics
Test for the pyroelectric coefficientThis standard is applicable to the measurement of the pyroelectric coefficient of insulation materials. 1 Definition of terms and symbols
LDC: 621.315
.612:621
GB 3389.8.-86
The definitions and terms used in this standard are in accordance with the provisions of B3389.1.-82 "Test methods for performance evaluation of electrical components"
2 Test principle
The standard adopts the integral method to measure the pyroelectric coefficient of ceramic materials. The following is a test principle diagram. This method measures the integrated pyroelectric charge on the capacitor, determines the change of residual polarization with temperature, uses a thermometer to measure the voltage across the capacitor, and inputs it to the function meter F end. Because the integral capacitor is close to the sample capacitor, the voltage change at its end is proportional to the change of residual polarization of the sample. When the temperature changes, the pyroelectric charge Q changes with the interception value, and the pyroelectric coefficient is obtained:
1-3, heat separation: 3-discharge humidity, sample:
5-insurance 6-handling: 7-energy y·number!
9—t source: m.-absolute
National Bureau of Standards 19860527 issued
198705-01 implementation
3 test conditions
GB 3389-8—86
3.1 Sample size and requirements: Fully polarized sample. Resistance R is not less than 110\2, size: area 4 is about 1cm2, thickness t is not more than 0.5mm
3.2 Filtration rate: 2 ~ 6℃ per minute. Test temperature range: temperature rise to 5℃.
3.4 ​​In order to make the sample temperature change, the sample to be tested must be placed in an isothermal zone of the sample size. 4 test method
4.1 Test circuit
As shown in the figure.
4.2 Test equipment and requirements
4.2.1 Heating oil tank: made of copper, the outer shell is connected to the outer shell of the shield, and the insulating oil is contained inside. The insulating oil should be connected to the sample rack and the temperature measuring thermocouple, and the insulation material should be added. 4.2.2 Thermoelectric bias of temperature measurement: the range of temperature is from room temperature to 85℃, and the temperature difference electromotive force is suitable. 4.2.3 Heater and temperature control equipment: used to control the temperature rise rate of the sample within the specified range: 4.2.4 Integral capacitor: depends on the size of the sample's electric discharge and the size of the pyroelectric coefficient, generally 10μl. Output resistance is not less than 1092. 4.2.5 Static; input impedance is not less than 11010. 4.2.6 Function recorder: relative reading difference is less than 1% or equal to 1%. The discharge time constant of the whole system is not less than 4×10°s, and the total flame retardancy of the system is 15×10°2 (and the 10F integral voltage is used for the inch. 2.7bzxZ.net
4.3 Test steps
4.3.1 After dialing 1 and connecting the line, place the sample buried in the clean and dry place on the sample rack and immerse it in the insulating oil. The sample and the thermoelectric code should be as close as possible.
4.3.2 Add flooding to the oil tank to make it heat up at a certain rate, and record it. 4.3.3 From the obtained QT line: obtain the slope of the line at the required temperature point, which is the thermal conductivity coefficient at that temperature. 4.4 Calculation of pyroelectric coefficient
Wu Zhong : Pa--pyroelectric coefficient, C/℃·m3; C
-integral penetration value, F;
A——-sample area, 2;
AT-...humidity change value, ℃;
the effect on AT! The electric change value of the two ends of the penetration, V: AV-
Additional instructions:
GB3389.8-86
This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard was organized and formulated by the Standardization Working Group for Testing of Ferroelectric Porcelain. This standard was initiated by the Institute of Hydrate. The main drafters of this standard are Liu Cuifeng and Lian Jingyu.
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