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. 14, 2015
Filed:
Jan. 14, 2011
Masato Yamazaki, Komaki, JP;
Takayuki Matsuoka, Nishikasugai-gun, JP;
Katsuya Yamagiwa, Komaki, JP;
Kazushige Ohbayashi, Nagoya, JP;
Masato Yamazaki, Komaki, JP;
Takayuki Matsuoka, Nishikasugai-gun, JP;
Katsuya Yamagiwa, Komaki, JP;
Kazushige Ohbayashi, Nagoya, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A lead-free piezoelectric ceramic composition includes a first crystal phase of alkali niobate/tantalate type perovskite oxide having piezoelectric properties and a second crystal phase of A-Ti—B—O composite oxide (where the element A is an alkali metal; the element B is at least one of Nb and Ta; and the contents of the element A, the element B and Ti are not zero). Examples of the second crystal phase are those represented by ATiBO, and x preferably satisfies 0≦x≦0.15.