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:
Jul. 22, 2008
Filed:
Oct. 25, 2005
Mitsuyoshi Matsushita, Chiba, JP;
Yosuke Iwasaki, Chiba, JP;
Mitsuyoshi Matsushita, Chiba, JP;
Yosuke Iwasaki, Chiba, JP;
JFE Mineral Co., Ltd., Tokyo, JP;
Abstract
A piezoelectric single crystal device is provided exhibiting excellent piezoelectric properties, within a specific high-temperature range of Tr° C. to (T−20)° C., where Trepresents a transformation temperature between a pseudocubic system and a tetragonal system. Specifically, the piezoelectric single crystal device is composed of a single crystal having a composition represented by [Pb(Mg,Nb)O]·[PbTiO], where X is within the range of 0.26 to 0.29 and having a complex perovskite structure, wherein a specific inductive capacity at 25° C. is 5,000 or more, and a specific inductive capacity at the transformation temperature between a pseudocubic system and a tetragonal system of the above-described single crystal is 2.5 times or more larger than the specific inductive capacity at 25° C.