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Metallization sintering powder for 95 alumina ceramic middle temperate metallization paste and preparation method thereof

A technology of alumina ceramics and metallization, which is applied in the application field of ceramic metallization materials, can solve the problems of low metallization strength and slow air leakage, and achieve the effects of high sintering density, good air tightness, and refined grains

Inactive Publication Date: 2014-07-30
XIAN YUANXING VACUUM ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some existing medium-temperature metallizations often encounter problems such as low metallization strength and slow air leakage.

Method used

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  • Metallization sintering powder for 95 alumina ceramic middle temperate metallization paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] a) Weigh 65 parts of Mo powder (mass ratio) and 35 parts of glass additive powder (mass ratio) to prepare a metallization slurry.

[0060] Molybdenum powder, 65 parts,

[0061] Glass phase composition:

[0062] MnO, 16 parts;

[0063] Al 2 o 3 ,3 copies;

[0064] SiO 2 , 11 copies;

[0065] CaO, 0.7 parts;

[0066] Mg, 3 parts.

[0067] Sintering aid components:

[0068] TiO 2 , 0 copies;

[0069] BaO, 0.3 parts;

[0070] Y 2 o 3 , 0 copies;

[0071] La 2 o 3 , 0 copies;

[0072] P 2 o 5 , 1 serving.

[0073] b) Preparation of glass additive powder with lower melting temperature. According to the above formula, 35 parts by weight of each glass phase component and sintering aid component were weighed, mixed evenly, placed in a platinum crucible, and melted in a silicon-molybdenum rod box-type electric furnace. After smelting at 1500°C, quickly pour the melted glass into cold water, and water quench to obtain glass slag. Put the glass slag into an ...

Embodiment 2

[0077] a) Weigh 70 parts of Mo powder (mass ratio) and 30 parts of glass additive powder (mass ratio) to prepare a metallization slurry.

[0078] Molybdenum powder, 70 parts,

[0079] Glass phase composition:

[0080] MnO, 14 parts;

[0081] Al 2 o 3 , 2 copies;

[0082] SiO 2 , 8 copies;

[0083] CaO, 1 part;

[0084] Mg, 2 parts.

[0085] Sintering aid components:

[0086] TiO 2 , 1 copy;

[0087] BaO, 0.5 parts;

[0088] Y 2 o 3 , 0 copies;

[0089] La 2 o 3 , 1 copy;

[0090] P 2 o 5 , 0.5

[0091] b) Preparation of glass additive powder with lower melting temperature. According to the above formula, 30 parts by weight of each glass phase component and sintering aid component were weighed, mixed evenly, placed in a platinum crucible, and melted in a silicon-molybdenum rod box-type electric furnace. After smelting at 1530°C, quickly pour the melted glass into cold water, and water quench to obtain glass slag. Put the glass slag into an agate ball mill...

Embodiment 3

[0095] a) Weigh 75 parts of Mo powder (mass ratio) and 25 parts of glass additive powder (mass ratio) to prepare a metallization slurry.

[0096] Molybdenum powder, 75 parts,

[0097] Glass phase composition:

[0098] MnO, 10 parts;

[0099] Al 2 o 3 , 2 copies;

[0100] SiO 2 , 9 copies;

[0101] CaO, 0.5 parts;

[0102] Mg, 1 part.

[0103] Sintering aid components:

[0104] TiO 2 , 0.5 parts;

[0105] BaO, 1 part;

[0106] Y 2 o 3 , 0.5 parts;

[0107] La 2 o 3 , 0 copies;

[0108] P 2 o 5 , 0.5 parts.

[0109] b) Preparation of glass additive powder with lower melting temperature. According to the above formula, 25 parts by weight of each glass phase component and sintering aid component were weighed, mixed evenly, placed in a platinum crucible, and melted in a silicon-molybdenum rod box-type electric furnace. After smelting at 1550°C, quickly pour the melted glass into cold water, and water quench to obtain glass slag. Put the glass slag into an aga...

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Abstract

The invention discloses metallization sintering powder for 95 alumina ceramic middle temperate metallization paste and a preparation method thereof, and the metallization sintering powder comprises the following components by weight: 60-80 parts of molybdenum powder; a glass phase component comprising 10-20 parts of MnO, 0.5-4 parts of Al2O3, 7-12 parts of SiO2, 0.5-1 part of CaO and 1-5 parts of Mg; and a sintering additive component comprising at least one substance of 0-1.2 parts of TiO2, 0-1.2 parts of BaO, 0-1.2 parts of Y2O3, 0-1.2 parts of La2O3 and 0-1.2 parts of P2O5. The sintering additive is added into the metallization paste, so that the metallization sintering temperature is reduced, Al2O3 ceramic surface metallization can be realized at 1370-1420 DEG C by the metallization paste using the sintering additive, and a ceramic metallization layer with high sintered density, good air tightness and high sealing tensile strength can be obtained. The tensile strength of a sample sealed with the metallization paste is over 120MPa, and at the same temperature, the metallization paste is much better than metallization paste without adding of a sintering additive in performance, and the preparation method has the advantages of simple process and convenient operation, and can ensure the stability of the paste and the requirements for mass production.

Description

technical field [0001] The invention belongs to the technical field of application of ceramic metallization materials, and relates to a metallization sintering powder for medium-temperature metallization slurry of 95 alumina ceramics and a preparation method thereof. Background technique [0002] At present, the sealing of 95 alumina ceramics and metals is widely used in vacuum devices such as vacuum switch tubes, discharge tubes, magnetrons, X-ray tubes, microwave tubes, etc., and the key step of sealing is 95 oxidation. Surface metallization of aluminum ceramics. When metallizing 95 porcelain, the Mo-Mn metallization method is generally used, with molybdenum as the main body, manganese-aluminum-silicon-calcium-magnesium and other oxide materials form a glass phase, which is prepared into a metallization slurry and coated on The surface of alumina ceramics is sintered at high temperature to form a metallized layer on the surface of alumina ceramics. The following is the a...

Claims

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Application Information

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IPC IPC(8): C04B41/88
Inventor 袁群李妮
Owner XIAN YUANXING VACUUM ELECTRONICS TECH
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