SJ 3231-1989 Low melting welding glass powder SJ3231-1989 standard download decompression password: www.bzxz.net

Ministry of Machinery and Electronics Industry of the People's Republic of China Standard SJ3231--89
Low-melting soldering glass powder and its test methods
Published on March 20, 1989
Implemented on March 25, 1989
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China Ministry of Machinery and Electronics Industry of the People's Republic of China Standard Low-melting soldering glass powder
1 Subject content and scope of application
1.1 Subject content
SJ3231-89
This standard specifies the technical requirements, inspection rules and inspection methods for glass materials used for sealing color picture tubes and other electronic devices.
1.2 Scope of application
This standard applies to low-melting soldering glass powder used for color picture tubes and other electronic devices. 2 Reference standards
GB9000.11
GB9000.12
3 Technical requirements
3.1 Appearance
Analysis of silicon dioxide in electronic glass.
Atomic absorption analysis of calcium oxide, strontium oxide, calcined iron oxide and magnesium oxide in electronic glass. Analysis of diboron trioxide in electronic glass, atomic absorption analysis of zinc oxide, lead oxide, aluminum oxide and antimony oxide in electronic glass. Analysis of lead oxide in electronic glass.
Test method for average linear expansion coefficient of electronic glass Test method for softening temperature of low-melting welding glass powder, test method for fluidity of low-melting welding glass powder. Test method for density of electronic glass,
Determination method for bonding residual stress of low-melting welding glass powder. Determination method for crystallization time of low-melting welding glass powder. This product is light yellow powder. It can be gray or other colors after adding colorant as needed. 3.2 Mechanical inclusions
Metal particles larger than 0.4mm are not allowed in this product, and mechanical inclusions smaller than 2.0mm shall not exceed 2. 3.3 Chemical composition
The chemical composition of low-melting welding glass powder shall comply with the provisions of Table 1. Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on March 20, 1989
Implemented on March 25, 1989
Chemical composition*
3.4 ​​Physical properties
SJ3231--89
The physical properties of low-melting welding glass powder shall comply with the range given in Table 2. Table 2
Indicator name
Average linear expansion coefficient α in the range of 0~300 Softening temperature
Flowability
Adhesion residual stress
Crystallization timeWww.bzxZ.net
Test method
Appearance: Observe with naked eyes.
Mechanical inclusions:
Instrument and material
nm·cm~i
Amount%
11.9±0.2
75.1±0.5
(98.0±1.5)×10~7
385±10
26.9~28.4
-50~+125
<100, 100%
a. Vibrating sieve: Model GS-AIH, 100 mesh, stainless steel sieve; b. Wire mesh;
With graduated magnifying glass (×10).
4.2.2 Determination steps
Sieve the two cans of samples twice. Vibrate for 5 minutes each time. Pour the sieve residue on white paper. Place a magnet under the white paper, move the magnetic pole close to the white paper, and observe whether there are metal particles and mechanical inclusions. If so, use a magnifying glass to measure their size and quantity.
4.3 The analysis of silicon dioxide shall be carried out in accordance with GB9000·2. 4.4
The analysis of barium oxide shall be carried out in accordance with GB9000·11. 4.5 The analysis of diboron trioxide shall be carried out in accordance with GB9000·3, and the analysis of zinc oxide shall be carried out in accordance with GB9000·12. 4.6
The analysis of lead oxide shall be carried out in accordance with GB9000·5. 4.8 The average linear expansion coefficient shall be determined in accordance with GB9622·2. The sample preparation method is shown in Appendix A. 4.9 The softening temperature shall be determined in accordance with SJ3232.1. 2
SJ3231-89
The fluidity shall be determined in accordance with SJ3232.2. The density shall be determined in accordance with GB9622·1. The sample preparation method is shown in Appendix A. 4.11
The adhesive residual stress shall be determined in accordance with SJ3232.3, and the crystallization time shall be determined in accordance with SJ3232.4. 4.14
4.14.1 Instruments and materials
a. Oven;
b. Balance: sensitivity 10mg;
c. Vibrating screen.
4.14.2 Determination steps
Weigh 50g of the mixed sample in 5.3, place it in a constant temperature oven at 110℃ for 1h, cool it in a dryer until it overflows, transfer it to a 100 sieve, and vibrate it for 10min. There should be no sieve residue. 5 Inspection rules
5.1 The supplier's quality inspection department shall conduct factory inspection according to this standard, and fill in the qualified form after the analysis is qualified. 5.2 The purchaser shall accept the product according to this standard. When the product quality does not meet this standard, it may be submitted to the supplier within three months from the date of receipt of the product, and the supply and demand parties shall negotiate to resolve the problem or entrust a third party to arbitrate. 5.3 Randomly select 3 cans (about 30kg) from each production batch (about 1T) as test samples, take about 100g from each can and mix them evenly for performance analysis. Randomly select 2 cans from the remaining samples for mechanical inclusion analysis. 6 Marking, packaging, transportation, purchase and storage
6.1 Each can of product weighs 10kg, and the inner layer is sealed with a polyethylene plastic bag and then placed in a tin can with a double-layer lid. 6.2 A label should be attached to the outside of the can. The product name, batch number, quantity, production date, manufacturer name, and a certificate of conformity should be attached to the inside of the can.
6.3 External packaging is required for transportation, and the material and size of the external packaging should be agreed upon by both the supplier and the buyer. Ensure that the packaging is not damaged during transportation. The external packaging should be labeled with the product name, batch number, quantity, production date, manufacturer name and moisture-proof mark.
6.4 This product must be stored in a dry and clean environment. 3
1 Instruments and materials
SJ3231-89
Appendix A
Sample preparation for expansion coefficient and density test of low-melting welding glass powder (supplement)
1.1 Test furnace: 30kW. The structural schematic diagram is as follows: 0
Structural schematic diagram of the test furnace
1 Furnace cover:
4 Quartz plate;
2 Iron box;
5 Quartz block;
7 Compressed air duct
1.2 Aluminum foil
3 Thermocouple compensation wire;
6 Sample:
1.3 Expansion coefficient sample iron box: overall dimensions I×b×h, mm: 120×10×15.1.4 Density sample iron box: overall dimensions I×b×h, mm: 50×35×10.2 Preparation steps
Place the glass powder sample in an iron box lined with aluminum box, move the sample box into the test furnace, pass compressed air with a flow rate of 3.5L·min, and sinter according to the heat treatment procedure: room temperature to 410℃, heating rate of 7.5℃. min-1; 410440℃, the rising rate is 3.5℃·min~; 440C insulation for 40min; 440~350℃, the cooling rate is SJ3231-89
2.5℃·min~; then cut off the power supply, turn off the compressed air, cool to air temperature, and take out the sample. Grind off the aluminum foil for the density test sample. The expansion coefficient test sample is processed and ground according to the required size. Additional remarks:
This standard is under the jurisdiction of the Electronic Standardization Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Factory 4400.
The main drafters of this standard are Shi Jifen and Li Guanghui.
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