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High-strength aluminum oxide ceramic metalized paste and preparation method thereof

An alumina ceramic and metallization technology, which is applied in the field of high-strength alumina ceramic metallization paste and its preparation, can solve the problems of difficult control of metallization process, difficult sintering of molybdenum, insufficient strength, etc. Sintering temperature, the effect of improving the sealing strength

Inactive Publication Date: 2013-06-26
JINZHOU METAL CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current problems are: the metallization layer is too thin, and when the glass phase is too small, the molybdenum is difficult to sinter or the strength is insufficient, which causes problems such as light board and powder drop.
When the glass phase is too much, it will cause difficulty in nickel plating
The amount of surface glass phase is not only related to the metallization sintering temperature, holding time, and sintering packing density, but also related to the metallization paste, which will also make the metallization process difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1.1. Take 840g molybdenum powder, 50g manganese powder, 50g AL 2 o 3 Powder, 50g of silica powder, 2g of calcium oxide, 2g of magnesium oxide, 2g of zirconia powder, and 4g of titanium dioxide powder were placed in an oven and dried at 100°C for 2 hours;

[0018] 1.2. Put the molybdenum powder into the ball mill, add 336g of absolute ethanol, and add alumina balls. The diameter of the alumina balls is Φ6~Φ10, and the weight ratio of alumina balls to molybdenum powder is 1:1. Grind for 24 hours to make The average particle size of the molybdenum powder reaches 1.5~2.0μm, and then, it is dried at a temperature of 100°C, and the alumina balls are screened out to obtain molybdenum powder with an average particle size of 1.5~2.0μm;

[0019] 1.3. Combine manganese powder, AL 2 o 3 Powder, silica powder, calcium oxide, magnesium oxide, zirconia powder and titanium dioxide powder are put into the ball mill, and alumina balls are added. The diameter of alumina balls is Φ6~Φ10...

Embodiment 2

[0022] 2.1. Take 700g molybdenum powder, 150g manganese powder, 59g AL 2 o 3 Powder, 50g of silica powder, 12g of calcium oxide, 12g of magnesium oxide, 15g of zirconia powder, and 2g of titanium dioxide powder were placed in an oven and dried at 110°C for 1 hour;

[0023] 2.2. Put the molybdenum powder into the ball mill, add 420g of absolute ethanol, and add alumina balls. The diameter of the alumina balls is Φ6~Φ10, and the weight ratio of alumina balls to molybdenum powder is 1:1. Grind for 48 hours to make The average particle size of the molybdenum powder reaches 1.5~2.0μm, then, it is dried at a temperature of 110°C, and the alumina balls are screened out to obtain molybdenum powder with an average particle size of 1.5~2.0μm;

[0024] 2.3. Combine manganese powder and AL 2 o 3 Powder, silica powder, calcium oxide, magnesium oxide, zirconia powder and titanium dioxide powder are put into the ball mill, and alumina balls are added. The diameter of alumina balls is Φ6~Φ...

Embodiment 3

[0027] 3.1. Take 700g molybdenum powder, 50g manganese powder, 150g AL 2 o 3 Powder, 60g of silica powder, 10g of calcium oxide, 10g of magnesium oxide, 10g of zirconia powder, and 10g of titanium dioxide powder were placed in an oven, and dried at 105°C for 1.5 hours;

[0028] 3.2. Put the molybdenum powder into the ball mill, add 350g of absolute ethanol, and add alumina balls. The diameter of the alumina balls is Φ6~Φ10, and the weight ratio of alumina balls to molybdenum powder is 1:1. Grind for 40 hours to make The average particle size of the molybdenum powder reaches 1.5~2.0μm, then, it is dried at a temperature of 105°C, and the alumina balls are screened out to obtain molybdenum powder with an average particle size of 1.5~2.0μm;

[0029] 3.3. Manganese powder, AL 2 o 3 Powder, silica powder, calcium oxide, magnesium oxide, zirconia powder and titanium dioxide powder are put into the ball mill, and alumina balls are added. The diameter of alumina balls is Φ6~Φ10, an...

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Abstract

The invention discloses high-strength aluminum oxide ceramic metalized paste and a preparation method thereof. The metalized paste disclosed by the invention is prepared from the following substances by weight percent: 70-85% of molybdenum powder, 5-15% of manganese powder, 5-15% of Al2O3 powder; 5-10% of silica powder, 0.2-1.2% of calcium oxide, 0.2-1.5% of magnesium oxide, 0.2-1.5% of zirconium oxide powder, and 0.2-1.0% of titanium dioxide powder. The preparation method comprises the steps of respectively putting the substances into an oven according to the ratio; baking for 1-2 hours at the temperature of 100-110 DEG C; putting the molybdenum powder into a ball grinder; adding absolute ethyl alcohol to grind for 24-48 hours; baking at 100-110 DEG C; and putting the manganese powder, the Al2O3 powder, the silica powder, the calcium oxide, the magnesium oxide, the zirconium oxide powder and the titanium dioxide powder into the ball grinder to grind for 4-6 hours; adding the grinded molybdenum powder to grind for 36-48 hours, so as to obtain the mixed powder of the materials; and adding a binder to the mixed powder to grind for 24-48 hours, so as to obtain the metalized paste.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics, in particular to a high-strength aluminum oxide ceramic metallization paste and a preparation method thereof. Background technique [0002] Alumina ceramics are the most widely used ceramics in structural ceramics. Due to the excellent electrical properties of alumina ceramics at high frequencies, its low dielectric constant, large volume resistance, high strength, and high wear resistance and impact resistance, it can be said that it includes almost all the excellent properties that insulating materials for electronic devices should have. performance. However, since ceramics are good insulating materials, ordinary solder cannot infiltrate them, so direct sealing with metal materials cannot be achieved. The solution is to first firmly form a layer of metal film on the surface of the ceramic seal, and then use this layer of metal film to seal with the metal material. The process of fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/88
Inventor 毕军邱志忠
Owner JINZHOU METAL CERAMICS
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