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. 15, 2013
Filed:
May. 16, 2008
Ruiping Wang, Ibaraki, JP;
Hiroshi Bando, Ibaraki, JP;
Ruiping Wang, Ibaraki, JP;
Hiroshi Bando, Ibaraki, JP;
Abstract
A piezoelectric solid solution composition containing, as a main component, a composition represented by the following general formula:{M(NaLiK)}{(TiZrHf)(NbTa)}Ois disclosed. In the formula, M represents a combination of at least one member selected from the group consisting of (BiK), (BiNa) and (BiLi) and at least one member selected from the group consisting of Ba, Sr, Ca and Mg; and in the formula, x, y, z, u, v, w and m are in the following ranges: 0.06<x≦0.3, 0≦y≦1, 0≦z≦0.3, 0≦(y+z)≦1, 0<u≦1, 0≦v≦0.75, 0≦w≦0.2, 0<(u+v)≦1 and −0.06≦m≦0.06. This solid solution composition preferably forms the same rhombohedral-tetragonal morphotropic phase boundary as in PZT, is environmentally friendly, and displays an excellent piezoelectric constant d.