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Ceramic metallizing paste and preparation method and application thereof

A technology for ceramic metallization and ceramic metal, applied in the field of ceramic metallization paste and its preparation, can solve problems such as insufficient sealing tensile strength, and achieve the effects of reducing energy consumption, small particle size, and reducing production costs

Active Publication Date: 2017-11-21
BEIJING BOE VACUUM ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above method can reduce the sintering temperature of the ceramic metallization paste to a certain extent and increase its sealing tensile strength, the sintering temperature is still higher than 1400°C, and the sealing tensile strength is insufficient, and there is still room for further improvement

Method used

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  • Ceramic metallizing paste and preparation method and application thereof
  • Ceramic metallizing paste and preparation method and application thereof
  • Ceramic metallizing paste and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Weigh 71% Mo powder, 8% Mn powder, 11% Al by mass percentage 3 o 2 Powder, SiO 2 Powder 8% and 2% CaO powder, mix and place in the ball mill jar, then add absolute ethanol and ZrO in the ball mill jar 2 Grinding balls, placed on a ball mill for ball milling; the weight ratio of metal mixed powder to absolute ethanol is 1:1; ZrO 2 The diameter of the grinding ball is 10 mm; the weight ratio of the grinding ball to the metal mixed powder is 2:1, and the average particle size of the metal mixed powder obtained after ball milling for 72 hours is 1 μm;

[0051] (2) Take out the slurry obtained after ball milling, put it in an oven, and dry it at 90° C. for 24 hours;

[0052] (3) take by weight 95% terpineol, 3% ethyl cellulose, 1.5% diethyl ether and 0.5% castor oil as binding agent by mass percentage, step ( 2) Mix the dried material with the binder and stir for 30 minutes with a stirrer; after the stirring is completed, use a three-roller grinder to carry out press...

Embodiment 2

[0056] (1) Weigh 73% Mo powder, 9% Mn powder, 9% Al by mass percentage 3 o 2 Powder, 7% SiO 2 powder and 2% CaO powder, mix and place in the ball mill jar, then add absolute ethanol and ZrO 2 Grinding balls are placed on a ball mill for ball milling; the weight ratio of metal mixed powder to absolute ethanol is 0.9:1; ZrO 2 The diameter of the grinding ball is 11 mm; the weight ratio of the grinding ball to the metal mixed powder is 2.5:1, and the average particle size of the metal mixed powder obtained after ball milling for 60 hours is 0.8 μm;

[0057] (2) Take out the slurry obtained after ball milling, put it in an oven, and dry it at 85°C for 30h;

[0058] (3) take by weight 93% terpineol, 5% ethyl cellulose, 1% diethyl ether and 1% castor oil as binding agent by mass percentage, step ( 2) Mix the dried material with the binder and stir for 40 minutes with a stirrer; after the stirring is completed, use a three-roller grinder to carry out pressing. When pressing, adju...

Embodiment 3

[0062] (1) Weigh 71% Mo powder, 9% Mn powder, 11% Al by mass percentage 3 o 2 Powder, 7% SiO 2 powder and 2% CaO powder, mix and place in the ball mill jar, then add absolute ethanol and ZrO 2 Grinding balls, placed on a ball mill for ball milling; the weight ratio of metal mixed powder to absolute ethanol is 1:1; ZrO 2 The diameter of the grinding ball is 10 mm; the weight ratio of the grinding ball to the metal mixed powder is 3:1, and the average particle size of the metal mixed powder obtained after ball milling for 68 hours is 0.6 μm;

[0063] (2) Take out the slurry obtained after ball milling, put it in an oven, and dry it at 88° C. for 27 hours;

[0064] (3) Weigh 96% terpineol, 3% ethyl cellulose and 1% diethyl butyl ether as binding agent by mass percentage, after step (2) is dried by the mass ratio of 6.0:1 The material and the binder are mixed, and stirred for 40 minutes with a stirrer; after the stirring is completed, the three-roll mill is used for pressing, ...

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Abstract

The invention relates to a ceramic metallizing paste and a preparation method and application thereof. The ceramic metallizing paste comprises the following components by mass percent: 71-73% of Mo powder, 8-13% of Mn powder, 9-11% of Al2O3 powder, 7-9% of SiO2 powder and 1.1-3% of CaO powder. All the powder in the formula are mixed and then ground to obtain the granularity of 0.5-1.3 [mu]m, and then a roll-pressing technology is adopted for paste making to obtain the fine and smooth paste with uniform ingredients and small granularity. The ceramic metallizing paste is subjected to metallizing sintering at 1,330-1,350 DEG C to realize good interinfiltration with ceramic, so that the energy consumption is reduced. When the end surface of ceramic is coated with the prepared ceramic metallizing paste, a metallized layer formed after sintering is continuous and compact, the sealing strength reaches 300 MPa or above, which is far higher than the industrial standard, the air tightness of a weld meets the demands, and favorable economical benefits and a wide application prospect are achieved.

Description

technical field [0001] The invention relates to the technical field of vacuum interrupters, in particular to a ceramic metallization paste and its preparation method and application. Background technique [0002] The vacuum interrupter is the heart of the vacuum switch and the main functional element of the vacuum switch. The quality of the ceramic metallization is crucial to the performance of the vacuum interrupter. In the existing ceramic metallization technology, powders such as molybdenum and manganese are used to make a paste and coated on the surface of ceramic and metal sealing, and then sintered at high temperature to make the powder sintered into a whole and penetrate into the surface of alumina ceramics, so that The metal layer and ceramics are sintered together, and at the same time, a moderately thick, dense and void-free metal layer is obtained, so as to achieve the conditions such as tensile strength and air tightness required for sealing. However, the parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/88
CPCC04B41/009C04B41/5138C04B41/88C04B35/00C04B41/5183C04B41/5031C04B41/5035C04B41/5027
Inventor 王立君刘宝华
Owner BEIJING BOE VACUUM ELECTRONICS CO LTD
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