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. 23, 2011
Filed:
May. 29, 2009
Toshiatsu Nagaya, Kuwana, JP;
Kouji Noda, Aichi-ken, JP;
Masatoshi Ikeda, Aichi-ken, JP;
Masaya Nakamura, Nagoya, JP;
Daisuke Shibata, Tokai, JP;
Toshiatsu Nagaya, Kuwana, JP;
Kouji Noda, Aichi-ken, JP;
Masatoshi Ikeda, Aichi-ken, JP;
Masaya Nakamura, Nagoya, JP;
Daisuke Shibata, Tokai, JP;
Denso Corporation, Kariya, JP;
Nippon Soken, Inc., Nishio, JP;
Abstract
A multilayered piezoelectric element and a method of producing the multilayered piezoelectric element are disclosed. The multilayered piezoelectric element is made of piezoelectric ceramic layers and electrode formation layers which are alternately laminated. The piezoelectric ceramic layers are made of crystal oriented ceramic as polycrystalline material. The crystal oriented ceramic is made mainly of an isotropic perovskite type compound in which the specific {100} crystal plane of each of crystal grains that form the polycrystalline material is oriented. The electrode formation layers have electrode parts forming inner electrodes containing a conductive metal. The isotropic perovskite type compound is expressed by a general formula (1):[Ag{Li(KNa)}](NbTaSb)O  (1),where 0≦x≦0.2, 0≦y≦1, 0≦z≦0.4, 0≦w≦0.2, x+z+w>0, 0<h≦0.05, 0.94≦j≦1, and 0≦k≦0.5).