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. 03, 2018
Filed:
Sep. 21, 2015
Tdk Corporation, Tokyo, JP;
Masaru Nanao, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
The present invention aims to provide a piezoelectric composition containing a composition represented by formula (5) as the main component, wherein the composition represented by formula (5) contains a first perovskite-type oxide represented by formula (1), a second perovskite-type oxide represented by formula (2), a tungsten bronze-type oxide represented by formula (3) and a third perovskite-type oxide represented by formula (4), (KNaLi)(NbTa)O(1), SrZrO(2), Ba(NbTa)O(3), (BiNa)TiOand/or (BiK)TiO(4), (1−m−n−p)A+mB+nC+pD (5); in formula (1), 0.20≤x≤0.80, 0.02≤y≤0.10, 0.01≤z≤0.30 and 0.800≤q≤1.050; in formula (3), 0.01≤w≤0.30; and in formula (5), A represents the composite oxide represented by formula (1), B represents the composite oxide represented by formula (2), C represents the composite oxide represented by formula (3), D represents the composite oxide represented by formula (4), and 0.04≤m≤0.07, 0≤n≤0.010 and 0.001≤p≤0.020.