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:
Apr. 04, 1995
Filed:
Mar. 30, 1993
Hideki Kita, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
The low thermal conductivity ceramic of the present invention comprises a sialon (Si--Al--O--N) and at least one element selected from among La, Dy, Ce, Hf and Zr and has an average grain size of 1.5 .mu.m or less and a thermal conductivity of 0.01 cal/cm.multidot.s.multidot..degree.C. or less. It can be produced by raising the temperature of a molding containing a sialon and the above elements in a gas atmosphere having a pressure of 5 arm or more at a high rate to conduct firing. The present invention enables the ceramic structure to be hyperfined and the phonon scattering to be enhanced, so that it is possible to provide a low thermal conductivity ceramic having a high strength and a low thermal conductivity.