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Method for improving insulating property of ceramic for high-power microwave energy-transmission windows

A technology of microwave energy transmission and ceramic insulation, which is applied in the field of microwave electronic vacuum devices, can solve problems such as the decline of insulation performance, achieve the effects of improving cleanliness, reducing volatilization, and solving the decline of ceramic insulation performance

Inactive Publication Date: 2014-01-15
安徽新芜精密装备制造产业技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a ceramic insulation performance that can improve the cleanliness of the ceramic surface, solve the problem of ceramic insulation performance decline, and improve the overall performance of electronic vacuum devices. Methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The method for improving the insulation performance of ceramics for high-power microwave energy transmission windows includes the following steps;

[0016] (1) Purification treatment before ceramic brazing;

[0017] First, degrease the ceramics in the ultrasonic wave for 10 minutes, repeat the degreasing 3 times; secondly, take out the ceramics and put them in deionized water for 15 minutes, repeat the cleaning 3 times; then put the ceramics into the hydrogen furnace, at a dew point of 20 ° In the wet hydrogen, after holding the heat for 20 minutes at 950 ° C, put the ceramics in dry hydrogen to cool;

[0018] (2) Purification and annealing treatment of brazing tooling;

[0019] The ceramic brazing solder is Ag72Cu28 as an example, and the brazing temperature is 800°C. After the welding tool for ceramic brazing is cleaned, it is purified and annealed in dry hydrogen at 850°C for 15 minutes;

[0020] (3) Cleaning treatment after ceramic brazing;

[0021] First, use 12...

Embodiment 2

[0023] The method for improving the insulation performance of ceramics for high-power microwave energy transmission windows includes the following steps;

[0024] (1) Purification treatment before ceramic brazing;

[0025] First, degrease the ceramics in the ultrasonic wave for 15 minutes, and repeat the degreasing 3 times; secondly, take out the ceramics and put them in deionized water for 10 minutes, and repeat the cleaning 3 times; In the wet hydrogen, after 25 minutes at 930 ° C, the ceramics are cooled in dry hydrogen;

[0026] (2) Purification and annealing treatment of brazing tooling;

[0027] After cleaning the welding tool for ceramic brazing, put it in a dry hydrogen atmosphere higher than the ceramic brazing temperature of 60°C for 15 minutes for purification and annealing;

[0028] (3) Cleaning treatment after ceramic brazing;

[0029] First, use 120-mesh clean quartz sand on the ceramic surface after brazing for 1 second at an air pressure of 0.6 MPa; then use...

Embodiment 3

[0031] The method for improving the insulation performance of ceramics for high-power microwave energy transmission windows includes the following steps;

[0032] (1) Purification treatment before ceramic brazing;

[0033] First, degrease the ceramics in ultrasonic for 13 minutes, repeat degreasing 3 times; secondly, take out the ceramics and put them in deionized water for ultrasonic cleaning for 13 minutes, repeat the cleaning 3 times; then put the ceramics into the hydrogen furnace, at a dew point of 15° In the wet hydrogen, after 15 minutes at 970 ° C, the ceramics were cooled in dry hydrogen;

[0034] (2) Purification and annealing treatment of brazing tooling;

[0035] After cleaning the welding tool for ceramic brazing, put it in a dry hydrogen atmosphere higher than the ceramic brazing temperature of 55°C for 13 minutes for purification and annealing;

[0036] (3) Cleaning treatment after ceramic brazing;

[0037] First, use 120-mesh clean quartz sand on the cerami...

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Abstract

The invention discloses a method for improving insulating property of ceramic for high-power microwave energy-transmission windows. The method includes the steps of (1) purification treatment before ceramic brazing; (2) purification annealing treatment for brazing fixtures; and (3) cleaning treatment after ceramic brazing. By the method for improving the insulating property of the ceramic for the high-power microwave energy-transmission windows, organic pollution of the ceramic before brazing is reduced by the aid of purification treatment before brazing of the ceramic for the high-power microwave energy-transmission windows, and cleanliness of the surface of the ceramic is controlled strictly; volatilization of metal vapor of the brazing fixtures is reduced during brazing by the aid of purification annealing treatment for the brazing fixtures; and cleanliness of the surface of the ceramic is improved by treating adsorbates on the surface of the ceramic after brazing. The problem of reduction of the ceramic insulating property is effectively solved, the insulating property of the ceramic is improved, and further the overall performance of a vacuum electron device is improved.

Description

technical field [0001] The invention relates to the field of microwave electronic vacuum devices, in particular to a method for improving the insulation performance of ceramics used in high-power microwave energy transmission windows. Background technique [0002] A large number of ceramic parts are used in electronic vacuum devices. Ceramics play an insulating role between electrodes. The cleanliness of ceramic surfaces directly affects the insulation between electrodes. For pouring and sintering ceramics without grinding or glazed surface, the surface is relatively dense and not easy to be polluted; but some ceramics, especially some high-power microwave energy transmission window ceramics, cannot be glazed on the surface processing, and requires high dimensional accuracy of the ceramics. After the ceramics are sintered, the surface must be ground. The surface of the ground ceramics not only becomes very rough, but also the surface layer is very loose and not dense; Some ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/91
Inventor 吴华夏贺兆昌肖兵李锐王起王芳
Owner 安徽新芜精密装备制造产业技术研究有限公司
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