Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1995-06-02
1998-02-03
Speer, Timothy
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
4283122, 4283128, 4283184, 4283197, 4283199, B32B 326
Patent
active
057142424
ABSTRACT:
A ceramic material is a calcined article obtained by calcining a molded ceramic article and in which the pores of the calcined article are impregnated with a substance which can be removed at a temperature lower than a sintering temperature for the molded ceramic article. A method for manufacturing a ceramic product includes the steps of calcining a molded ceramic article, impregnating the open pores of the calcined ceramic article with a substance which can be removed at a temperature lower than a sintering temperature for the calcined ceramic article, mechanically machining the ceramic article to impart a desired shape thereto, removing the substance from the ceramic article, and then sintering the ceramic article. Large-sized ceramic products having a high strength and an excellent shape accuracy and having complex shapes can be manufactured at low costs. The change of the product shape can be accomplished only by changing a program for operation, and for the ceramic products having various shapes, a prompt design changing is possible.
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patent: 4579705 (1986-04-01), Matsuoka et al.
patent: 4892786 (1990-01-01), Newkirk
patent: 5116663 (1992-05-01), Fujimoto
patent: 5238593 (1993-08-01), Jones et al.
patent: 5258205 (1993-11-01), Wu
Egawa Koji
Kato Shigeki
Watanabe Keiichiro
NGK Insulators Ltd.
Speer Timothy
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