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:
Feb. 27, 2001
Filed:
Jun. 10, 1998
Applicant:
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/510 ;
U.S. Cl.
CPC ...
C04B 3/510 ;
Abstract
This invention relates to highly toughened alumina sintered bodies, and the highly toughened alumina sintered bodies are fabricated by sintering an &agr;-aluminum oxide powder which is obtained by employing an aluminum hydroxide produced by the Bayer's process as a starting material, and calcining at 900-1200° C. a mixture obtained by adding abrasion powder worn from pulverizing alumina balls or another product to the material, in an amount of 0.01-20 mass % as seed crystals for &agr;-aluminum oxide.