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:
Oct. 21, 1986
Filed:
Mar. 12, 1984
Nobuyuki Kuramoto, Sagamihara, JP;
Hitofumi Taniguchi, Chigasaki, JP;
Tokuyama Soda Kabushiki Kaisha, Yamaguchi, JP;
Abstract
A fine powder of aluminum nitride having an average particle diameter of not more than 2 microns and comprising at least 94% by weight of aluminum nitride, at most 3% by weight of bound oxygen and at most 0.5% by weight as metal of metal compounds as impurities. The fine aluminum nitride powder is prepared from a fine alumina powder and a fine carbon powder as starting materials. The fine aluminum nitride powder provides a sintered body having a high purity and a high density such as at least 2.9 g/cm.sup.3. The fine aluminum nitride powder is also useful as a raw material for alpha-Sialon, beta-Sialon and AlN polytypes, as an addition aid in various ceramics.