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. 05, 1996
Filed:
Feb. 07, 1995
Applicant:
Inventors:
Kenji Ichikawa, Okayama, JP;
Hisayuki Harako, Tokyo, JP;
Teiichi Fujiwara, Okayama, JP;
Masashi Taniguchi, Okayama, JP;
Assignee:
Shinagawa Refractories Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501133 ;
Abstract
A method for producing silica brick comprising firing a siliceous stone material containing silica as a main component is disclosed, in which 0.05 to 0.25% by weight of Na.sub.2 O--CaO--SiO.sub.2 fused and solidified material and 0.1 to 1.0% by weight, in terms of Fe.sub.2 O.sub.3, of iron oxide are added to the siliceous stone material, before firing. Transformation of silica into tridymite is effectively accelerated to provide silica bricks mainly comprising tridymite with reduced contents of residual silica and amorphous glass and exhibiting improved creep resistance.