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Nano vacuum restoration agent and its preparation and application

A repairing agent and vacuum technology, applied in the field of nano-vacuum repairing agent and its preparation and application in the field of vacuum electronic devices, can solve the problems of serious volatilization, complex temperature resistance of volatile gas, etc., and achieve high bonding strength and good temperature resistance The effect of sex and airtightness

Inactive Publication Date: 2008-11-19
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to overcome the problems of serious volatilization, complex volatile gas and low temperature resistance of the above-mentioned technologies, and propose a nano-vacuum repair agent and its preparation method to solve the air leakage problem of electric vacuum devices, Maintain high vacuum and improve the temperature resistance and service life of electric vacuum devices.

Method used

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  • Nano vacuum restoration agent and its preparation and application

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Experimental program
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Effect test

Embodiment 1

[0037] 1 Composition (wt%): Ultrafine In powder (particle size 60-80nm nearly spherical): 35% PVP: 6%

[0038] Epoxy: 59%

[0039] Ethanol: 500ml

[0040] 2. Preparation process of nanometer vacuum repair agent:

[0041] (1) Ultrafine In powder 3.5g and PVP 0.6g were ultrasonically dispersed in 100ml ethanol for 25min according to the ratio to obtain a uniformly dispersed nano metal powder suspension.

[0042] (2) Dissolve 5.9g of epoxy resin in 400ml of ethanol completely to make a binder solution.

[0043] (3) Mix the binder solution and the nano-metal powder suspension, and disperse evenly by ultrasonic, and the ultrasonic time is 30 minutes to obtain a mixed solution.

[0044] (4) The mixed solution is placed in a vacuum oven with a constant temperature of 80°C and kept at 10 -1 Concentrate under vacuum for 10-12 hours until ethanol evaporates completely. The paste-like nano-vacuum repair agent can be obtained.

[0045] 3 Application of Nano V...

Embodiment 2

[0048] 1 Composition (wt%): Ag 70 In 15 sn 11 Cu 4 Metal powder (subscript is weight percentage, the same below) (particle size 20-60nm nearly spherical): 40%

[0049] PvP: 20%

[0050] Epoxy resin: 40%

[0051] Ethanol: 750ml

[0052] 2. Preparation process of nanometer vacuum repair agent:

[0053] (1) Ultrasonic dispersion of 4 g of silver alloy nano-powder and 2 g of PVP in 350 ml of ethanol according to the ratio for 30 min to obtain a uniformly dispersed nano-metal powder suspension.

[0054] (2) Dissolve 4g of epoxy resin weighed in 400ml of ethanol completely to make a binder solution.

[0055] (3) Mix the binder solution and the nano-metal powder suspension, and disperse evenly by ultrasonication, and the ultrasonication time is 15 minutes. to obtain a mixed solution.

[0056] (4) The mixed solution is placed in a vacuum oven with a constant temperature of 80°C and kept at 10 -1 Concentrate under vacuum for 10-12 hours until ethanol evaporates completely. T...

Embodiment 3

[0060] 1 Composition (wt%): Ag 64 Cu 24 sn 8 Metal powder (particle size 20-80nm nearly spherical): 45%

[0061] CTAB: 30%

[0062] Epoxy: 25%

[0063] Acetone: 600ml

[0064] 2. Preparation process of nanometer vacuum repair agent:

[0065] (1) Ultrasonic disperse 4.5g of silver alloy nanopowder and CTAB3g in 350ml acetone for 25min according to the ratio to obtain a uniformly dispersed nanometal powder suspension.

[0066] (2) Dissolve the weighed 25g of epoxy resin in 250ml of acetone completely to form a binder solution.

[0067] (3) Mix the binder solution and the nano-metal powder suspension, and disperse evenly by ultrasonication, and the ultrasonication time is 15 minutes. A mixed solution was obtained.

[0068] (4) The mixed solution is placed in a vacuum oven with a constant temperature of 80°C and kept at 10 -1 Concentrate under vacuum for 10-12 hours until the acetone evaporates completely. The paste-like nano-vacuum...

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Abstract

The invention realtes to a nano vacuum repair agent and its process for preparing and its application. The invention has reduced the fusing point of the nano metal powder making use of the body effect of the nano metal powder and the organic -nano metal powder composite technology and has carried out vacuum renovation of the metal powder by generating multiple actions such as diffusion, gap filling and reaction to form strong and compact close-binder with the base under a lower temperature. The preparation technology includes three parts: 1) the preparation of the nano metal powder; 2) the dispersion of the metal powder; 3) the recombination of the organic-nano metal powder. The repair agent has advantages such as high bond strength and thermal insulation, good air impermeability and so on.

Description

technical field [0001] The invention relates to a vacuum repairing agent and its preparation and application, in particular to a nano-vacuum repairing agent and its preparation and application in the field of vacuum electronic devices. Background technique [0002] For vacuum electronic devices, vacuum sealing is an indispensable condition. But for a long time, vacuum electronic devices have been plagued by vacuum sealing problems: often due to the metal material itself or the processing technology, the metal tube shell, weld There is a leak in the sealing place with the heterogeneous material, which leads to a decrease in the vacuum degree, which affects the normal operation of the overall device. Therefore, the development of a vacuum repair agent with high reliability and excellent temperature resistance has great application prospects and economic significance. [0003] At present, the materials used for vacuum sealing and vacuum repair mainly include: epoxy resin, sili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L79/08C08K3/08C09K3/10H01J9/50
CPCY02W30/82
Inventor 颜秀文丘泰张振忠李晓云
Owner NANJING TECH UNIV
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