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:
Aug. 27, 2013
Filed:
Sep. 25, 2012
Hiroshi Saito, Yokohama, JP;
Toshihiro Ifuku, Yokohama, JP;
Satoshi Wada, Kofu, JP;
Nobuhiro Kumada, Kofu, JP;
Keisuke Yamato, Kofu, JP;
Takashi Iijima, Tsukuba, JP;
Bong-yeon Lee, Tsukuba, JP;
Hiroshi Saito, Yokohama, JP;
Toshihiro Ifuku, Yokohama, JP;
Satoshi Wada, Kofu, JP;
Nobuhiro Kumada, Kofu, JP;
Keisuke Yamato, Kofu, JP;
Takashi Iijima, Tsukuba, JP;
Bong-Yeon Lee, Tsukuba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
University of Yamanashi, Yamanashi, JP;
National Institute of Advanced Industrial Science & Technology, Tokyo, JP;
Abstract
Provided is a piezoelectric material having good piezoelectric properties and a Curie temperature (Tc) of 150° C. or higher, and a piezoelectric device using the piezoelectric material. The piezoelectric material includes a sintered body made of a perovskite-type metal oxide represented by the following general formula (1): xBi(MgTi)O-(1-x)BaTiO(1), where x satisfies 0.17≦x≦0.8, in which an average grain size of grains contained in the sintered body is 0.5 μm or larger to 10 μm or smaller, and the sintered body is polycrystalline. In addition, the piezoelectric device includes a piezoelectric material and a pair of electrodes disposed in contact with the piezoelectric material, in which the piezoelectric material is the above-mentioned piezoelectric material.