Ceramic porous bodies and method of producing the same

Details Ceramic porous bodies and method of producing the same Ceramic porous bodies and method of producing the same

1996-12-20

1998-05-12

Marcantoni, Paul

Compositions: ceramic

Ceramic compositions

Pore-forming

501 88, 501 89, 501 91, 501 92, 501 93, 501 961, 501 971, C04B 3800, C04B 3556, C04B 3558

Patent

active

057504490

ABSTRACT:
A ceramic porous body composed principally of silicon carbide or silicon nitride which has higher strength, higher heat resistance and higher thermal shock resistance and has a large number of fine pores, and a method of producing the same. The ceramic porous body, comprised principally of silicon carbide or silicon nitride, has a pore diameter of not more than 1 .mu.m, with a porosity of not less than 35%, and has a flexural strength of not less than 100 MPa. The ceramic porous body is produced by using a silicon oligomer which is capable of producing silicon carbide or silicon nitride when calcined, mixing the silicon oligomer with a silicon carbide powder or silicon nitride powder, and/or other ceramic powder which has a mean particle diameter of not more than 1.0 .mu.m, molding the mixture into shape, then sintering the molding in a suitable atmosphere at temperatures of not less than 1200.degree. C.

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Chemical Abstracts, vol. 110, No. 10, Mar. 6, 1989, Columbus, Ohio, US; abstract No. 81297s, XP000018590 *abstract* & JP 63 210 066 A (UBE Industries) Aug. 31, 1988.
Ceramic Engineering and Science Proceedings, vol. 10, No. 7/08, Jul. 1, 1989, pp. 833-836, XP000126489, Rogers J. J. et al.: "Silicon Carbide and Silicon Nitride Structural Ceramics Derived from a Preceramic Polymer Binder" (1989).

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