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Ceramic metallizing process

A ceramic metallization and metallization technology, applied in the field of ceramic metallization, can solve the problems of uncontrollable coating layer thickness, narrow adaptability, and low coating efficiency, so as to achieve easy control of coating layer thickness and improve sealing strength , The effect of improving the coating efficiency

Active Publication Date: 2007-01-03
CHANGSHU CITY YINYANG CERAMIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Both No. 2 and No. 3 formulas have shortcomings. The former has too many types of oxides, and the latter has a higher metallization temperature and poor adaptability to porcelain.
[0006] Properly adjusted on the basis of No. 2 and No. 3 formulas, after reducing the types of oxides, No. 4 formula is adjusted, which can be better suitable for Mg-Al-Si series 95% alumina ceramics, but MnO raw materials are used in the formula , because MnO is very unstable and easily oxidized to MnO 2 etc., so it is difficult to master the matching
[0007] The types of oxides are simplified in formula No. 5, but this formula is only suitable for transparent corundum ceramics, and the adaptability is too narrow
[0008] Formula No. 6 has a simple composition and is suitable for a variety of ceramics, but the metallization temperature is relatively high
[0009] The second is that the coating process of applying the metallization paste to the surface of both ends of the ceramic substrate is relatively backward. Usually, manual coating is used, resulting in uncontrollable thickness of the coating layer, large dispersion of thickness and low coating efficiency. Coating, so it needs to be repeated many times during the coating process, resulting in a large waste of paste, resulting in increased product costs

Method used

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  • Ceramic metallizing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A) prepare metallization paste, take by weighing 60 parts of molybdenum powder, 25 parts of glass phase materials, and 25 parts of binder, put into a ball mill jar equipped with agate balls, place the ball mill jar on a ball mill for ball milling, the frequency of the ball mill Set at 20Hz, after 15h of ball milling, use a filter screen to separate the abrasive material from the agate balls to obtain a metallized paste for coating, for subsequent use, wherein: the glass phase material is made of the following raw materials in the following weight ratio Composed of 35 parts of alumina, 1.5 parts of calcium oxide, 20 parts of silicon dioxide, 40 parts of manganese powder, 2.5 parts of titanium powder, 2 parts of zirconium dioxide, and the binder is 20 parts of terpineol by weight Prepared with 1 part of ethyl cellulose;

[0029] B) Fixture preparation, equipped figure 1 The shown fixture 1 is made of high temperature-resistant bakelite material, and a set of ceramic subs...

Embodiment 2

[0037] The molybdenum powder in the step A), the glass phase material, the component of binder are respectively 70 parts, 40 parts, 30 parts, the frequency of ball mill 25Hz, ball milling time 20h, the aluminum oxide 23 parts in the glass phase material, calcium oxide 1.5 parts, 30 parts of silicon dioxide, 32 parts of manganese powder, 4 parts of titanium powder, 2.5 parts of zirconium dioxide, 25 parts of terpineol;

[0038]The distance between the screen plate and the ceramic substrate 1 in step D) is adjusted to 1.5mm, and the angle of the scraper is 50°;

[0039] The drying furnace temperature in step F) is 100°C for 18 minutes, and the sintering temperature is 1425°C for 60 minutes. The metallization thicknesses of the 9 devices obtained are 68um, 68um, 68.1um, 68um, 68.2um, 68um, 67.9um, 68.9um, 68.9um, and the rest are the same

[0040] Description of Example 1.

Embodiment 3

[0042] The molybdenum powder, glass phase material, and binder in step A) are 75 parts, 30 parts, and 35 parts respectively, the frequency of the ball mill is 30 Hz, the ball milling time is 25 h, 40 parts of alumina in the glass phase material, 1 part of calcium oxide, 25 parts of silicon dioxide, 30 parts of manganese powder, 2 parts of titanium powder, 3.5 parts of zirconium dioxide, 30 parts of terpineol;

[0043] The distance between the screen plate and the ceramic substrate 1 in step D) is adjusted to 2 mm, and the angle of the scraper is 60°;

[0044] The drying furnace temperature in step F) is 120° C. for 15 minutes, and the sintering temperature is 1400° C. for 50 minutes.

[0045] The measured metallization thickness of the device is 66um, 66.2um, 66um, 66.1um, 66.2um, 66um, 66.2um, 66um, 66um, and the rest are the same as the description of Example 1.

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Abstract

The ceramic metallizing process belongs to the field of ceramic metallizing technology. The ceramic metallizing process includes the following steps: compounding metallizing paste via ball milling; cleaning fixture via decontaminating, deoiling and stoving; holding ceramic base in the fixture and setting on printer table; locating printing web plate and regulating angle of printer scraper; printing metallizing paste onto one end of the ceramic base; and stoving and baking to seep to obtain metallized ceramic device. The present invention has the advantages of 60 % raised ceramic sealing strength, baking and seeping temperature lowered to 1400-1450 deg.c, easy control of the metallizing paste thickness and raised painting efficiency.

Description

technical field [0001] The invention relates to a ceramic metallization method, which is used to metallize at least one end face of a ceramic substrate of a magnetron anode assembly of a microwave oven, so that the metallized ceramic substrate can be sealed with a metal such as Kovar alloy, and belongs to Technical field of ceramic metallization processing. Background technique [0002] The reason why there is no official production of metallized ceramic devices for microwave oven magnetrons in my country at present is because metallized ceramic devices used for microwave oven magnetrons are compared with discharge tubes, vacuum switch shells, electronic devices, Detection sensors, etc. are much more stringent in terms of technical quality requirements. Therefore, my country's metallized ceramic devices for microwave oven magnetrons are almost all imported from South Korea, Japan and other countries. Although some manufacturers and scientific research institutions are active...

Claims

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Application Information

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IPC IPC(8): C04B41/88
Inventor 高永泉郝志龙翟文斌
Owner CHANGSHU CITY YINYANG CERAMIC CO LTD
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