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:
Sep. 28, 2010
Filed:
Aug. 24, 2007
Hirofumi Yamaguchi, Komaki, JP;
Shuichi Ozawa, Nagoya, JP;
Hirofumi Yamaguchi, Komaki, JP;
Shuichi Ozawa, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
There is disclosed a piezoelectric/electrostrictive body in which a polarization direction of a domain indicates reversible conversion in an electric field and a strain ratio increases, a manufacturing method of the same, and a piezoelectric/electrostrictive element. The piezoelectric/electrostrictive body includes a matrix phase represented by a composition formula ABO, and an additional, material phase included in the matrix phase, having at least a crystal structure of tetragonal system, represented by a composition formula ABOand having a composition different from that of the matrix phase. For example, an alkali-niobate-based material of the tetragonal system, BaTiO, PZT, PbTiO, or (Bi, Na)TiOis added as an additional material forming the additional material phase to an alkali-niobate-based matrix material forming the matrix phase to form the piezoelectric/electrostrictive body. An amount of the additional material to be added has a volume ratio of 5 vol % or more and 30 vol % or less (5 vol % or more and 45 vol % or less in a case where an additional material having a composition to which Mn has been added is used) with respect to the matrix material.