A kind of aluminum silicon carbide shell insulator and its sintering method

Abstract

The invention discloses an aluminum silicon carbide tube shell insulator and a sintering method thereof. The aluminum silicon carbide tube shell is placed on a sintering mold, the glass powder hollow tube is placed on the corresponding hole position on the aluminum silicon carbide tube shell, and the middle is pierced. Insert the lead wire, then separate the two ends of the hole and fill with carbon powder, put the mold together with the shell into the microwave sintering furnace, adjust the microwave output power and time for sintering, and complete the welding of the aluminum silicon carbide shell, insulator and lead. The invention provides different temperature fields through microwave selective heating, realizes the sintering of the glass insulator of the aluminum silicon carbide shell, and solves the problem that the aluminum silicon carbide is not heat-resistant in the traditional sintering process.

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...

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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

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