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:
Apr. 18, 2017
Filed:
Feb. 04, 2010
Kazuhiko Koike, Okazaki, JP;
Kiyomi Kobayashi, Kuwana, JP;
Kazuhiko Koike, Okazaki, JP;
Kiyomi Kobayashi, Kuwana, JP;
DENSO CORPORATION, Kariya, JP;
NIPPON SOKEN, INC., Nishio, JP;
Abstract
A solid electrolyte is made of zirconia grains containing yttria and alumina grains dispersed in the zirconia grains. In the solid electrolyte, the yttria content per zirconia content is within a range of 2 to 10 mol. %, the relative density is not less than 93%, and the average particle size Rz of the zirconia grains is not more than 2 μm, an average particle size Ra of the alumina grains is not more than 1 μm. The average particle size Ra of the alumina grains is smaller than the average particle size Rz of the zirconia grains. An average distance value Abetween the alumina grains is not more than 2 μm, and a standard deviation Sthereof is not more than 0.8. The solid electrolyte satisfies a relationship of (S/A)×Rz≦0.9.