窒化ケイ素セラミックスの電気接合プロセスにおける加熱メカニズム

概要

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The electrical joining of Si_3N_4 ceramics using a local heating system was studied to clarify the relevant heating mechanism. In this study, a CaF_2/kaolinite mixture with suitable electroheating characteristics and good reactivity with Si_3N_4 ceramics was used as a joining agent. The temperature characteristics of conductivity of the joining agent, the electrical characteristics during electroheating and the composition of the joint layer were examined. The heating process in this joining method consisted of preheating by a gas flame and principal heating by electroheating. The electrical conduction of the joining agent was due to ionic conduction of CaF_2 and the conductivity was enhanced by preheating. Starting electrical charging to the joining agent, joule heat was generated and the entire joining plane was heated to high temperature by the self-controlling mechanism arising from changes in the composition of the joining agent. In addition, the maximum temperature in the joining plane was estimated about 1800℃ by thermal conduction analysis.
社団法人日本セラミックス協会の論文
1993-06-01