Technical data of Type DB-488 electronic glass

SJ/T 10588.22-1994 Technical data of DB-488 electronic glass SJ/T10588.22-1994 Standard download decompression password: www.bzxz.net

Electronic Industry Standard of the People's Republic of China
Technical data of typeDB-488electronicglass1 Subject content and applicable scope
This standard specifies the chemical composition and physical and chemical performance indicators of DB-488 electronic glass. This standard is applicable to glass materials used in electronic devices such as black and white cathode ray tubes and indicator tubes. 2 Reference standards
GB9000
Standard method for chemical analysis of electronic glass
Analysis of cerium oxide in color cathode ray tube glass GB9474.4
GB9622
3 Technical requirements
Test methods for physical and chemical properties of electronic glass
Chemical composition is shown in Table 1.
Chemical composition
Weight percentage
65.2±1.0
0.10±0.05
3.55±0.50
12.5±0.5
7.17±0.50
7.37±0.50
0.40±0.10
Note: 1) FeO, as impurity control, is not included in the percentage composition. 3.2 Physical and chemical performance indicators are shown in Table 2
Approved by the Ministry of Electronics Industry of the People's Republic of China on August 8, 1994 SJ/T10588.22--94
Test method
GB9000.12
GB9000.10
GB9000.14
Implemented on December 1, 1994
Indicator name
SJ/T10588.22-94
Average linear thermal expansion coefficient α in the range of 0 to 300°C Density
Softening point
Annealing point
Strain point
Dielectric at frequency 6MHz and temperature 20°C Loss tangent value tgo×10bzxZ.net
Volume resistivity at 350℃ Igp
Thermal stability
Water resistance chemical stability level
(94.5±2.0)×10-
2.679±0.010
665±10
465±10
425±10
≥120
Test method
GB9622.881
GB9622.11
Note: 2) Articles 4.5 and 4.6 are combined and carried out as follows: The measurement starts from the starting point, keeps warm at 300℃ for 10 minutes, and then starts the measurement. Continue to increase the furnace temperature, and measure once every 10℃ increase until the measurement ends at 390℃. Additional Notes:
This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by Tianjin Jinjing Glass Shell Co., Ltd. and the Standardization Institute of the Ministry of Electronics Industry. The main drafters of this standard are Li Zongpu, Liu Chengjun and Qu Yuan.
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