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. 05, 2016
Filed:
Jul. 23, 2015
Applicant:
Denso Corporation, Kariya, Aichi-pref., JP;
Inventor:
Shota Imada, Obu, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/02 (2006.01); C04B 35/10 (2006.01); H01T 13/08 (2006.01);
U.S. Cl.
CPC ...
C04B 35/10 (2013.01); H01T 13/08 (2013.01);
Abstract
An alumina sintered body contains a main phase consisting of alumina crystal, and crystalline phases dispersed in the main phase. The crystalline phases consist of at least one selected from a group consisting of MgAlO, 2MgO.2AlO.5SiO, 2MgO.SiOand MgO.SiO. The average grain size of the crystalline phases is 0.4 μm to 5.3 μm. In an arbitrary area having a size of 100 μm×100 μm in a cross-section of the alumina sintered body, the number of the crystalline phases having grain sizes 1 μm to 5 μm is 8 to 412.