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Aluminum silicon carbide tube shell electrical insulator and sintering method thereof

The technology of a silicon carbide tube and a sintering method is applied in the field of aluminum silicon carbide tube shell insulators and its sintering, and can solve the problems of sintering insulators that are not suitable for aluminum silicon carbide tube shells, difficult to weld insulators, and materials that are not resistant to high temperature. The effect of solving the problem of difficult sintering, low crack tendency and no pollution

Active Publication Date: 2019-05-03
西安明科微电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum silicon carbide shell with high volume fraction has good thermal conductivity, small type variable and high reliability. It belongs to the high-end product of microwave and hybrid circuit shells. However, the aluminum silicon carbide shell itself has great shortcomings, and it is difficult to make insulator welding
[0003] At present, most of the insulators on the market are glass or ceramics, and their sintering temperature is generally 800°C-1200°C. During the sintering process, most of the insulators need to be heated as a whole under vacuum or protective atmosphere, and the time is relatively long. However, this process It is not suitable for the sintering of the insulator of the aluminum silicon carbide shell, because the continuous heating of the aluminum silicon carbide material at such a high temperature will produce a series of unknown changes, and the material itself is not resistant to high temperature

Method used

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  • Aluminum silicon carbide tube shell electrical insulator and sintering method thereof
  • Aluminum silicon carbide tube shell electrical insulator and sintering method thereof
  • Aluminum silicon carbide tube shell electrical insulator and sintering method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] S1. Place the aluminum silicon carbide shell with holes designed in advance on a custom mold mixed with stainless steel and graphite, and the limited slot on the mold can fix the shell;

[0041] S2. Put the self-made glass powder hollow tube on the hole of the tube shell, and insert the Kovar lead wire in the middle;

[0042] S3. Separate the two ends of the hole with graphite paper, and then fill the hole with carbon powder to ensure that the carbon powder can completely bury the hole;

[0043] S4. Put the mold together with the shell into the self-made microwave sintering furnace, adjust the microwave output power to 100W, and the sintering time to 60min, and start the sintering by running the program;

[0044] S5. After sintering, take out the shell, clean the surface, and complete the sintering of the insulator. The lead wire and the aluminum silicon carbide shell are well welded through insulating glass, and the airtightness is less than 10 -10 Pa·m 3 / s, meet th...

Embodiment 2

[0046] S1. Place the aluminum silicon carbide shell with holes designed in advance on a custom mold mixed with stainless steel and graphite, and the limited slot on the mold can fix the shell;

[0047] S2. Put the self-made glass powder hollow tube on the hole of the tube shell, and insert the Kovar lead wire in the middle;

[0048] S3. Separate the two ends of the hole with graphite paper, and then fill the hole with carbon powder to ensure that the carbon powder can completely bury the hole;

[0049] S4. Put the mold together with the shell into the self-made microwave sintering furnace, adjust the microwave output power to 10KW, the sintering time to 10min, and start the sintering with the operating program;

[0050] S5. After sintering, take out the shell, clean the surface, and complete the sintering of the insulator. The lead wire and the AlSiC shell are well welded by insulating glass, and the airtightness is less than 10 -10 Pa·m 3 / s, meet the national military standa...

Embodiment 3

[0052] S1. Place the aluminum silicon carbide shell with holes designed in advance on a custom mold mixed with stainless steel and graphite, and the limited slot on the mold can fix the shell;

[0053] S2. Put the self-made glass powder hollow tube on the hole of the tube shell, and insert the Kovar lead wire in the middle;

[0054] S3. Separate the two ends of the hole with graphite paper, and then fill the hole with carbon powder to ensure that the carbon powder can completely bury the hole;

[0055] S4. Put the mold together with the shell into the self-made microwave sintering furnace, adjust the microwave output power to 5000W, the sintering time to 30min, and start the sintering with the running program;

[0056] S5. After sintering, take out the shell, clean the surface, and complete the sintering of the insulator. The lead wire and the AlSiC shell are well welded by insulating glass, and the airtightness is less than 10 -10 Pa·m 3 / s, meet the national military stand...

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Abstract

The invention discloses an aluminum silicon carbide tube shell electrical insulator and a sintering method thereof. The sintering method comprises the following steps: an aluminum silicon carbide tubeshell is placed on a sintering mold, a glass powder hollow tube sleeves a corresponding hole position in the aluminum silicon carbide tube shell, a lead wire is inserted into the middle, then two ends of the hole are separated and filled with carbon powder, the mold is placed into a microwave sintering furnace together with the tube shell, microwave output power and time are adjusted, sintering is performed, and therefore welding of the aluminum silicon carbide tube shell, the electrical insulator and the lead wire is completed. According to the method provided by the invention, different temperature fields are provided by means of microwave selective heating, sintering of the glass electrical insulator of the aluminum silicon carbide tube shell is realized, and the problem that aluminumsilicon carbide is not resistant to heat in a conventional sintering process is solved.

Description

technical field [0001] The invention belongs to the technical field of aluminum silicon carbide shell welding, and in particular relates to an aluminum silicon carbide shell insulator and a sintering method thereof. Background technique [0002] Due to its unique material properties, aluminum silicon carbide is widely used in the field of electronic packaging, and is the material of choice in harsh environments such as aerospace. The aluminum silicon carbide shell with high volume fraction has good thermal conductivity, small type variable and high reliability. It belongs to the high-end product of microwave and hybrid circuit shells. However, the aluminum silicon carbide shell itself has great shortcomings, and it is difficult to make insulator welding. [0003] At present, most of the insulators on the market are glass or ceramics, and their sintering temperature is generally 800°C-1200°C. During the sintering process, most of the insulators need to be heated as a whole u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/02
Inventor 刘昌涛陈燕
Owner 西安明科微电子材料有限公司
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