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Surface treating method for improving insulating resistance of glass-to-metal sealing member

A technology of glass-to-metal sealing and insulation resistance, which is applied in the field of glass-to-metal sealing, can solve the problems of insulation resistance drop, short circuit, and unstable insulation resistance of sealing parts, so as to improve insulation resistance performance, ensure safety performance, and improve resistance discoloration effect

Inactive Publication Date: 2009-05-06
中国兵器工业第二一三研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, after most of the sealing parts are electroplated, two phenomena often occur: (1) The insulation resistance of some sealing parts decreases. After the subsequent process treatment, the insulation resistance of some sealing parts is less than 500MΩ (DC: 500V) or even short-circuited, which cannot meet the minimum insulation resistance requirements of the sealing parts of electrical pyrotechnics
(2) After a period of time, some of the sealed parts that have passed the inspection will have an unstable insulation resistance due to the influence of the environment, generally floating around 500MΩ (DC: 500V). In terms of pyrotechnics, it will directly affect the safety and reliability of pyrotechnics

Method used

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  • Surface treating method for improving insulating resistance of glass-to-metal sealing member
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  • Surface treating method for improving insulating resistance of glass-to-metal sealing member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Surface Treatment of Glass-Kovar Alloy (4J29) Seals

[0029] (1) After electroplating and tap water flushing of the seal, use a concentration of 10% NaCO 3 After soaking in the neutralizing solution for 10 minutes, shake and wash with ultrasonic equipment for 3 times, soak in alcohol for 5 to 6 minutes, put it into the drying oven, heat the drying oven to 120 °C, keep it for 10 hours, and then cool it naturally in the drying oven; Put it in the desiccator for 5 hours, take it out, and test the insulation resistance. Table 1 shows the comparison of the test results after the surface treatment of the glass-Kovar alloy (4J29) sealing parts by the present invention and the prior art respectively.

[0030] Table 1 Effect Comparison Table of Embodiment 1

[0031]

Embodiment 2

[0032] Example 2 Surface treatment of glass-alloy steel (30CrMnSi) seals

[0033] (2) After electroplating and tap water flushing of the seal, use a concentration of 10% NaCO 3 After soaking in the neutralizing solution for 10 minutes, wash it with ultrasonic equipment for 4 times, soak it in alcohol for 5-6 minutes, put it into the drying oven, heat the drying oven to 130°C, keep it for 10 hours, and then cool it naturally in the drying oven; Put it in the desiccator for 5 hours, take it out, and test the insulation resistance. Table 2 shows the comparison of the test results after surface treatment of glass-alloy steel (30CrMnSi) sealing parts by the present invention and the prior art respectively.

[0034] Table 2 Effect comparison table of embodiment 2

[0035]

Embodiment 3

[0036] Example 3 Surface Treatment of Glass-Stainless Steel (1Cr18Ni9Ti) Seals

[0037] (3) After electroplating and tap water flushing of the seal, use a concentration of 10% NaCO 3 After soaking in the neutralizing solution for 10 minutes, shake and wash it 5 times with ultrasonic equipment, put it into the drying oven after soaking in alcohol for 5-6 minutes, heat the drying oven to 140°C, keep it for 10 hours, and then cool it naturally in the drying oven; Put it in the desiccator for 5 hours, take it out, and test the insulation resistance. Table 3 shows the comparison of the test results after the surface treatment of the glass-stainless steel (1Cr18Ni9Ti) sealing parts by the present invention and the prior art respectively.

[0038] Table 3 Effect comparison table of embodiment 3

[0039]

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Abstract

The invention discloses a surface treatment method for increasing insulation resistance of a glassy metal sealing piece. The method is mainly characterized in that: firstly, the acidity of plating solution remained in the sealing piece is neutralized by neutralization solution, and the sealing piece is repeatedly washed by washing equipment and soaked in clean alcohol so as to remove the plated solution deeply hidden in micro stomata on the glass surface and the bottoms of micro cracks; and the cleaned sealing piece is heated and roasted by a drying oven and cooled down so as to fully evaporate water in the glass of the sealing piece, vapor remained in the sealing piece is further adsorbed by a drier, so that the sealing piece is thoroughly dried. With the method, the insulation resistances of the sealing pieces of various electric initiating explosive devices are improved from unstable 500M omega(DC:500V) to stable more than 5,000M omega (DC:500V), the problem existing in the sealing pieces in the glass sealing industry that the insulation resistance of the sealing pieces after being electrically plated is decreased and unstable is solved, and the safety and reliability of the electric initiating explosive device are further improved.

Description

technical field [0001] The invention belongs to the technical field of glass-to-metal sealing, and mainly relates to a surface treatment method of a glass-to-metal seal, in particular to a surface treatment method for improving the insulation resistance of a glass-to-metal seal. Background technique [0002] Glass-to-metal seals (referred to as seals) refer to a connection made by installing special glass powder, pre-oxidized metal shells and pins in special molds, and sintering at a high temperature of 600-1000°C under the protection of nitrogen atmosphere. . At present, there are mainly two types of sealing methods for glass and metal: matching sealing and non-matching sealing. Matching sealing is the sealing of glass and metal with similar linear expansion coefficients. When sealing, the glass and metal keep shrinking in the same way, so the internal stress of the sealing is small. A non-matching seal is a seal between glass and metal with a large difference in linear e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00C03C19/00
Inventor 上官小红颜宝锋张广生姜鹏涛闫旭
Owner 中国兵器工业第二一三研究所