Process for sealing ceramic-stainless steel

Abstract

The invention provides a ceramic-to-stainless steel seal process. The process comprises the steps of processing a ceramic sheet and a stainless steel sheet, preparing a bonding agent, preparing a glass paste, coating the paste, oxidizing the stainless steel sheet, and sealing. The process has the advantages that the process improves a low-temperature oxide solder method for adapting ceramic-stainless steel seal, and achieves good seal performance, airtight performance and seal strength in terms of influences of the glass paste on the impregnation of a 95 aluminum oxide ceramic sheet and stainless steel sheet, the influences of the thickness of an oxidation film of the stainless steel sheet on the seal performance and the interface conditions of a seal piece. A proper thickness of an oxidation film on the surface of the stainless steel is more favorable for seal.

Description

technical field [0001] The invention relates to a welding process, in particular to a ceramic-stainless steel sealing process. Background technique [0002] With the rapid development of functional ceramics, engineering ceramics, high-temperature structural ceramics and biological ceramics, alumina ceramics still have a place, and there is no possibility of any material that can replace it in large quantities. This is especially true in applications such as vacuum switches, microwave tubes, power electronics, and discharge tube casings. [0003] For more than 20 years, the formula and composition of high alumina porcelain have not changed much and improved, although in recent years, some experts at home and abroad have made some discussions on additives, and they have also benefited from performance or sintering temperature. , but it is finite after all. [0004] At present, there are two trends in the metallization temperature. One is that the United States, Britain, and ...

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Problems solved by technology

[0003] For more than 20 years, the formula and composition of high alumina porcelain have not changed much and improved, although in recent years, some experts at home and abroad have made some discussions on additives, and they have also benefited from performance or sintering temperature. , but after all it is limited

[0005] At present, the commonly used sealing process is the metal powder method. This sealing method has high sealing quality, but the sealing cost is high and the sealing quality is difficult to control.

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