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:
Jan. 26, 2016
Filed:
Nov. 29, 2011
Yutaka Sekiguchi, Ichinomiya, JP;
Yoshihito Ikai, Tsushima, JP;
Takeshi Mitsuoka, Kounan, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A ceramic heater elementincludes an insulating substrate, and a heating resistorembedded in the insulating substrate. The insulating substratecontains a main phase formed of β-SiAlON or a multiphase SiAlON of β-SiAlON and α-SiAlON; a grain boundary phase containing a rare earth element; and a silicide of at least one species selected from among Cr, W, Mo, V, and Fe. The heating resistorcontains a main phase formed of an electrically conductive compound containing at least one species selected from among silicide, nitride, and carbide of Mo, and silicide, nitride, and carbide of W; β-SiAlON or a multiphase SiAlON of β-SiAlON and α-SiAlON; and a grain boundary phase containing a rare earth element.