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Composition for metallization of 95 alumina ceramic small hole and use method thereof

An alumina ceramic and hole metallization technology, applied in the field of 95 alumina ceramic metallization compositions, can solve the problems of high air leakage rate and low sealing strength, and achieve the effects of uniform thickness and improved sealing strength.

Active Publication Date: 2009-07-22
上海新华东光电技术研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also gradually developing towards small volume, and it is often necessary to treat 95-Al with a diameter of less than 2mm 2 o 3 Metallization of ceramic inner holes, when using existing materials for metallization, the sealing strength of small holes is often only about 120MPa, and the air leakage rate is higher than 30%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a) Take 60 parts by weight of molybdenum powder, 20 parts by weight of manganese powder, 95-Al 2 o 3 Put 20 parts by weight of porcelain powder, 0.1 part by weight of titanium dioxide powder and agate balls into a ball mill jar and mix evenly. The total weight of the powder: weight of agate balls = 1:2;

[0022] b) Add butyl acetate and nitrocellulose to the powder mixed by ball milling, then mix evenly on the ball mill, the volume, volume and weight ratio of butyl acetate and nitrocellulose to the total weight of the powder are 25ml: 50ml: 100g;

[0023] c) The ceramic metallization paste mixture prepared in step b is coated on 95-Al with a diameter of 2mm 2 o 3 On the ceramic inner hole, the coating thickness is 55-65μm, and the 95-Al 2 o 3 The ceramics are placed in a metallized sintering furnace, the sintering temperature is 1550°C, and the heat preservation time is 40 minutes. Control its dew point to -20℃±5℃.

Embodiment 2

[0025] a) Take 65 parts by weight of molybdenum powder, 17.5 parts by weight of manganese powder, 95-Al 2 o 3 Put 17.5 parts by weight of porcelain powder, 0.5 parts by weight of titanium dioxide powder and agate balls into a ball mill jar, mix evenly, the total weight of powder: weight of agate balls = 1:2;

[0026] b) Add butyl acetate and nitrocellulose to the powder mixed by ball milling, then mix evenly on the ball mill, the volume, volume and weight ratio of butyl acetate and nitrocellulose to the total weight of the powder are 15ml: 40ml: 100g;

[0027] c) The ceramic metallization paste mixture prepared in step b is coated on the 95-Al with a diameter of 1.5mm 2 o 3 On the ceramic inner hole, the coating thickness is 55-65μm, and the 95-Al 2 o 3 The ceramics are placed in a metallized sintering furnace, the sintering temperature is 1530°C, and the heat preservation is 50 minutes. Control its dew point to -25℃±5℃.

Embodiment 3

[0029] a) Take 70 parts by weight of molybdenum powder, 15 parts by weight of manganese powder, 95-Al 2 o 3 Put 15 parts by weight of porcelain powder, 1 part by weight of titanium dioxide powder and agate balls into a ball mill jar and mix evenly. The total weight of the powder: the weight of agate balls = 1:2;

[0030] b) Add butyl acetate and nitrocellulose to the powder mixed by ball milling, then mix evenly on the ball mill, the volume, volume and weight ratio of butyl acetate and nitrocellulose to the total weight of the powder are 30ml: 60ml: 100g;

[0031] c) The ceramic metallization paste mixture prepared in step b is coated on 95-Al with a diameter of 1mm 2 o 3 On the inner hole of the ceramic, the coating thickness is 55 μm, and the 95-Al 2 o 3 The ceramics are placed in a metallized sintering furnace, the sintering temperature is 1550°C, and the heat preservation is 40 minutes. The sintering atmosphere is hydrogen and nitrogen gas, and its volume ratio is 3:1....

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Abstract

The invention discloses a composition for metallizing 95 alumina ceramic pinholes and a using method thereof. The composition comprises the following substances in percentage by weight: 60 to 70 percent of molybdenum powder, 15 to 20 percent of manganese powder, 15 to 20 percent of 95-Al2O3 ceramic powder and 0.1 to 1 percent of titania powder. Compared with the prior art, the method improves soakage capacity of the composition for metallizing the 95 alumina ceramic pinholes on ceramics by addition of the titania powder into the composition, so that the sealing strength of the 95-Al2O3 ceramics and metallic sealing pieces is improved and reaches between 300 and 400 MPa; the air leakage rate of the sealing pieces is less than 3 percent; and the thickness of metallic layers of the 95 alumina ceramic pinholes is uniform.

Description

technical field [0001] The invention belongs to the composition and its application method for the metallization of 95 alumina ceramics, in particular to the use of vacuum electron 95-Al 2 o 3 Compositions for aperture metallization on ceramics and methods of use thereof. Background technique [0002] Microwave vacuum devices are widely used in radar, electronic countermeasures, satellite communications and other projects, and are known as the "heart" of electronic systems. With the development of science and technology, microwave vacuum electronic devices are gradually developing towards small volumes, which also leads to the use of 95-Al in microwave vacuum electronic devices. 2 o 3 Ceramics, 95 alumina ceramics refer to ceramics with an alumina content of 95%. It is also gradually developing towards small volume, and it is often necessary to treat 95-Al with a diameter of less than 2mm 2 o 3 Metallization of ceramic inner holes, when using existing materials for met...

Claims

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Application Information

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IPC IPC(8): B22F7/00
Inventor 吴华夏方卫肖兵阮智文
Owner 上海新华东光电技术研究所有限公司