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High resistivity and high expansion coefficient glass powder for aluminum and aluminum alloy sealing and preparation method thereof

A high-resistivity, glass-sealing technology, which is applied in the field of aluminum and aluminum alloy sealing, can solve the problems of high cost, long production cycle, and high requirements for the use environment, and achieve improved electrical performance, improved breakdown voltage, and anti-breakdown strength high effect

Inactive Publication Date: 2015-06-10
辽宁法库陶瓷工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the purpose of solving the above problems, the present invention proposes a glass powder for sealing aluminum and aluminum alloys with high resistivity and high expansion coefficient and its preparation method. The phosphate glass system is used to add elements such as sodium, potassium, lead, and barium. Improve the internal structure of the glass, improve the airtightness and electrical insulation performance of the glass insulator under the premise of ensuring that the expansion coefficient is compatible with aluminum and aluminum alloys, and solve the high cost and long production cycle of the existing aluminum and aluminum alloy electrical connectors , the use environment requires advanced technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Molar percentage P 2 0 5 72%, B 2 0 3 6%, Al 2 o 3 4%,Na 2 O5%, K 2 O13%, use phosphorus pentoxide, boric acid, alumina, sodium carbonate, and potassium carbonate to introduce the feed respectively, mix 400-500g of the material and mix evenly, add it to a dry 800ml alumina dry pot, keep it at 200°C for 10h and at 1100°C for 2h Finally, pour the molten glass into cold water to obtain the desired glass, then put it in a 150°C oven for 3 hours, take it out, use an alumina ball mill jar and alcohol ball mill for 35 minutes, take it out, put it in a 60°C oven and dry it for 12 hours, and pass it for 200 After the mesh sieve, add wax to granulate, pass through a 40 mesh sieve to obtain the required aluminum and aluminum alloy sealing glass powder.

[0020] The resistivity of the obtained aluminum and aluminum alloy sealing glass frit is 1.9×10 10 Ω〃cm (300°C), expansion coefficient 183×10 -7 / ° C (20 ~ 300 ° C), the transition temperature is 338 ° C, t...

Embodiment 2

[0021] Embodiment 2: P by molar percentage 2 0 5 60%, B 2 0 3 5%, Al 2 o 3 10%,Na 2 O7%,K 2 O8% and PbO10% are respectively introduced and fed with phosphorus pentoxide, alumina, boric acid, sodium carbonate, potassium carbonate, and lead oxide. Mix 400-450g of materials and add them into a dry 800ml alumina dry pot, and keep warm at 200°C for 10h After heat preservation at 1000°C for 2 hours, pour the glass liquid into cold water to quench the desired glass, then put it in an oven at 150°C to dry for 3 hours, take it out, use an alumina ball mill jar and alcohol ball mill for 30 minutes, take it out and put it in an oven at 60°C Dry for 12 hours, pass through a 200-mesh sieve, add wax to granulate, and pass through a 40-mesh sieve to obtain the required aluminum and aluminum alloy sealing glass powder.

[0022] The resistivity of the obtained aluminum and aluminum alloy sealing glass frit is 2.2×10 10 Ω〃cm (300°C), expansion coefficient 205×10 -7 / ° C (20 ~ 300 ° C)...

Embodiment 3

[0023] Embodiment 3: P by molar percentage 2 0 5 70%, B 2 0 3 6%, Al 2 o 3 5%,Na 2 O5%,K 2 O11% and BaO3% are respectively introduced and fed with phosphorus pentoxide, aluminum oxide, boric acid, sodium carbonate, potassium carbonate, and barium carbonate. Mix 400-450g of materials and add them into a dry 800ml alumina dry pot, and keep warm at 200°C for 10h After heat preservation at 1150°C for 2 hours, pour the glass liquid into cold water to quench the desired glass, then put it in an oven at 150°C to dry for 3 hours, take it out, use an alumina ball mill jar and alcohol ball mill for 30 minutes, take it out and put it in an oven at 60°C Dry for 12 hours, pass through a 200-mesh sieve, add wax to granulate, and pass through a 40-mesh sieve to obtain the required aluminum and aluminum alloy sealing glass powder.

[0024] The resistivity of the obtained aluminum and aluminum alloy sealing glass frit is 2.4×10 10 Ω〃cm (300°C), expansion coefficient 219×10 -7 / ° C (2...

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Abstract

The invention relates to a high resistivity and high expansion coefficient glass powder for aluminum and aluminum alloy sealing and a preparation method thereof, and solves the problems of high technical cost, long production cycle, high use environment requirement and the like in the prior art. The glass powder adopts a phosphate glass system, and comprises 45-72% of P2O5, 6-15% of B2O3, 4-12% of Al2O3, 5-15% of Na2O, 8-17% of K2O, and 0-15% of PbO+BaO+CaO+MgO. The preparation method includes: according to the proportion, weighing and mixing the components, conducting heat preservation at 200-250DEG C for 10h in a 800ml alumina dry pot, then conducting heat preservation at 950-1150DEG C for 2h, performing water quenching with cold water, then placing the water quenched glass in a 150-170DEG C oven to conduct drying for 2-4h, after drying, adding alcohol into the ceramic pot to carry out ball milling, drying and sieving, thus obtaining the required product. The product is mixed with paraffin slices, compression moulding and drying are carried out, and then an aluminum and aluminum alloy shell and a green glass body are assembled and placed in a graphite mold, the mold is placed into a vacuum furnace, heat preservation is performed and then the temperature is lowered to room temperature, thus obtaining an electric connector. The glass powder provided by the invention can effectively improve the signal transmission ability and anti-interference ability of electronic components.

Description

technical field [0001] The invention belongs to the technical field of aluminum and aluminum alloy sealing, and relates to a high-resistivity and high-expansion-coefficient glass powder used for sealing aluminum shells and a preparation method thereof. Background technique [0002] With the continuous development of electronic technology in the fields of industrial control, medical equipment, testing and measuring equipment, radio and television communications, aerospace and other fields, electronic equipment is becoming more sophisticated, complex and multi-functional, and the application occasions and environments are becoming more and more diverse. Under today's demand, the requirements for signal transmission capability and anti-electromagnetic interference capability of electronic components are also getting higher and higher. Therefore, the performance of electrical connectors made of Kovar alloy and stainless steel in the prior art has been difficult to meet the needs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24C03C29/00
Inventor 周亮韩绍娟许壮志薛健张明杨殿来
Owner 辽宁法库陶瓷工程技术研究中心
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