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:
Nov. 02, 1993
Filed:
Feb. 26, 1992
Applicant:
Inventor:
Kiminari Kato, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 65 ; 264 66 ; 264 67 ;
Abstract
After hydrostatic pressure is applied to a formed ceramic material, the hydrostatic-pressure-applied formed ceramic material is calcined in such a temperature that shrinkage after calcination is less than one percent. The obtained calcined ceramics has an average pore size of 0.04-0.3 .mu.m and a total pore volume of 0.1-0.3 cc/g and a four-point bending strength of 2-20 kg/mm.sup.2. The calcined ceramics is worked wet by machines to a desired shape, and afterwards the shaped ceramic material is sintered to manufacture a ceramic product.