The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 1991
Filed:
Oct. 27, 1988
Yoshinari Miyamoto, Kawanishi, JP;
Hirohiko Nakata, Itami, JP;
Osaka University, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to a pressure self-combustion sintering method for obtaining a ceramic sintered body. Conventionally, in order to sinter ceramics by the pressure self-combustion sintering method, a mixture comprising metallic elements and non-metallic elements has been inserted into an airtight vessel and then a filament formed of W, Mo and the like as a heat source for starting a reaction has been placed within said airtight vessel followed by heating by adding energy to this heat source from outside of the airtight vessel and applying an isostatic pressure to the mixture comprising metallic elements and non-metallic elements to start a synthetic reaction of ceramics from one end of said mixture, thereby carrying out a chain synthetic sintering of ceramics by a reaction heat. However, this method requires drawing a power supply lead wire formed of a filament made of W, Mo and the like out of the airtight vessel for the filament formed of W, Mo and the like placed within the airtight vessel while maintaining a airtightness. It has been said that this is remarkably difficult industrially. Accordingly, the pressure self-combustion sintering method has never been practically used industrially. The present invention was achieved by finding that the problems of the conventional method can be solved by covering an exterior of the airtight vessel, into which the mixture comprising metallic elements and non-metallic elements is inserted, with the mixture comprising metallic elements and non-metallic elements in place of using the filament formed of W, Mo and the like as the heat source, that is ignition agent.