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:
Dec. 10, 1991
Filed:
Feb. 27, 1990
Tetsushi Iwamoto, Yamagata, JP;
Nobuhiro Ogawa, Shinnanyo, JP;
Tosoh Corporation, Shinnanyo, JP;
Abstract
An indium oxide powder or indium oxide/tin oxide powder having an average primary particle diameter of 1 to 0.01 .mu.m, a BET surface area of 15 to 50 m.sup.2 /g, and a specific surface area of 2 to 5 m.sup.2 /g as determined from the particle diameter distribution. The mixed powder is prepared by coprecipitating an indium- and tin-containing salt from a solution containing indium and tin, calcining the salt, and pulverizing the calcined product using a specific vibrating pulverizer. A sintered body, prepared by sintering the indium oxide/tin oxide powder, has a density of at least 5.3 g/cm.sup.3, a specific resistance of 2.times.10.sup.-3 to 2.times.10.sup.-4 .OMEGA.-cm, and an average grain diameter of 5 to 15 .mu.m.