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Metal-glass sealing process

A glass sealing and metal technology, applied in capacitor casing/package, electrical components, capacitor parts, etc., can solve the problems of poor high temperature sealing and poor consistency of tantalum capacitors, and achieve high insulation resistance, improved quality, and high tensile strength. Effect

Inactive Publication Date: 2009-09-16
西安华泰有色金属实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a metal-glass sealing process in view of the deficiencies in the above-mentioned prior art, the process steps are simple, the operation is easy, the product has high air tightness, high sealing strength and good consistency, It can solve the problem of liquid leakage of lithium batteries or liquid tantalum capacitors caused by poor high temperature sealing and poor consistency of metal-glass sealing insulators

Method used

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  • Metal-glass sealing process

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The sealing process of 304 stainless steel upper cover and 4J52 alloy core post glass sealing insulator for lithium / sub-battery:

[0035] The expansion coefficient of 304 stainless steel is: 19×10 -6 / °C, the expansion coefficient of 4J52 Kovar alloy is: 9.8×10 -6 / °C, according to the new sealing method, the selected expansion coefficient is: 6.4×10 -6 / ℃ sealing glass, the specific sintering process is as follows: Now assemble the 304 stainless steel upper cover, the formed glass blank and the 4J52 alloy core column in the graphite mold, put it into the high temperature sintering furnace, turn on the mechanical pump to vacuum, and the vacuum is pumped to 10 -1 Pa, heat up to 600°C at a heating rate of 10°C / min, and continue vacuuming to make the vacuum degree of the furnace chamber ≤5.0×10 -2 Pa, and keep it warm for 30 minutes. After the heat preservation is over, turn off the vacuum pump and fill the furnace chamber with nitrogen with a purity of 99.99%. ℃, after...

Embodiment 2

[0038] Sealing process of cold-rolled steel upper cover and tantalum core column glass-sealed insulator for lithium / manganese dioxide battery:

[0039] The expansion coefficient of cold-rolled steel is: 12×10 -6 / ℃, the expansion coefficient of metal tantalum is: 6.5×10 -6 / °C, according to the new sealing method, the selected expansion coefficient is: 3.4×10 -6 / °C sealing glass, the specific sintering process is as follows: Now assemble the cold-rolled steel upper cover, the formed glass billet and the tantalum core column in the graphite mold, put them into the high-temperature sintering furnace, turn on the mechanical pump to vacuum, and the vacuum is pumped to 10 -1 Pa, heat up to 550°C at a heating rate of 10°C / min, and continue vacuuming to make the vacuum degree of the furnace chamber ≤5.0×10 -2 Pa, and keep it warm for 30 minutes. After the heat preservation is over, turn off the vacuum pump and fill the furnace chamber with nitrogen with a purity of 99.99%. When th...

Embodiment 3

[0042] The sealing process of the tantalum upper cover and the tantalum stem glass-sealed insulator for high-energy hybrid tantalum capacitors:

[0043] The expansion coefficient of tantalum is: 6.5×10 -6 / °C, according to the new sealing method, the selected expansion coefficient is: 3.4×10 -6 / °C sealing glass, the specific sintering process is as follows: Now assemble the tantalum upper cover, the formed glass blank and the tantalum core column in the graphite mold, put them into the high-temperature sintering furnace, turn on the mechanical pump to evacuate, and the vacuum is evacuated to 10 -1 Pa, heat up to 600°C at a heating rate of 10°C / min, and continue vacuuming to make the vacuum degree of the furnace chamber ≤5.0×10 -2 Pa, and keep it warm for 30 minutes. After the heat preservation is over, turn off the vacuum pump and fill the furnace chamber with argon gas with a purity of 99.99%. When the pressure in the furnace chamber is 1Pa, turn off the gas filling valve a...

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Abstract

The invention discloses a metal-glass sealing process, which comprises the following steps: according to the expansion coefficient of a metal upper cover being greater than the expansion coefficient of glass and the expansion coefficient of the glass being less than or equal to the thermal expansion coefficient of a metal mandril, selecting sealing glass powder; pressurizing the selected glass powder into a glass blank by a mould, and dewaxing and forming the glass blank in a furnace; respectively putting a metal material and the glass blank into a deoiling solution for treatment, and washing and drying the metal material and the glass blank after the deoiling; and assembling the metal upper cover, the metal mandril and the formed glass blank in a graphite mould, and sintering the assembled graphite mould in a sintering furnace. The metal and glass products sealed by the metal-glass sealing process have good sealing strength, good leakproofness with the leak rate less than 10 <-10>m <3>. Pa / s, and good leakproofness at a high temperature, and can solve the problems of fluid leakage, poor consistency and the like of consumer products. The metal-glass sealing process has strong operability and good consistency of the prepared products, and meets the requirement of mass production.

Description

technical field [0001] The invention relates to the technical field of metal-glass sealing, in particular to a sealing process for glass-sealed insulators for lithium batteries and fully sealed liquid tantalum capacitors. Background technique [0002] Lithium batteries and fully sealed liquid tantalum capacitors are widely used in various weapons and equipment in the fields of the army, navy, air force, and aerospace. Widely used in all kinds of civil equipment. [0003] Metal-glass sealed insulators are key components of lithium batteries and hermetically sealed liquid tantalum capacitors, which include: metal upper cover, insulating glass and metal stem. The metal upper cover is connected to the negative pole of the lithium battery or tantalum capacitor, the metal stem is connected to the positive pole, and the middle is sealed with insulating glass. The quality of the sealing of the insulator directly affects the reliability and service life of lithium batteries and liq...

Claims

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Application Information

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IPC IPC(8): C03C29/00H01M2/04H01M2/06H01M2/26H01G9/08H01M50/119H01M50/131H01M50/172H01M50/188H01M50/191H01M50/54
CPCY02E60/12Y02E60/10
Inventor 冯庆冯生杨文波唐平生龙海云赵红刚胡水任越峰
Owner 西安华泰有色金属实业有限责任公司
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