公开(公告)号：US09105845B2

公开(公告)日：2015-08-11

申请号：US13712426

申请日：2012-12-12

Applicant: TDK CORPORATION

Inventor： Hideaki Sone ,  Tomohisa Azuma ,  Masahito Furukawa ,  Satoko Ueda

IPC: H01L41/187 ,  C04B35/495 ,  H01L41/083

CPC classification number: H01L41/1873 ,  C04B35/495 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3244 ,  H01L41/083

Abstract: A piezoelectric ceramic with environmental friendliness including a composition as the main component composed of a composite oxide free from lead (Pb) as a constituent element, and with excellent piezoelectric characteristics such as the relative dielectric constant, the electromechanical coupling factor, and the piezoelectric constant, and a piezoelectric device using the piezoelectric ceramic, are provided. A piezoelectric ceramic including a composition represented by the following general formula as the main component: (K1-x-y-w-vNaxLiyBawSrv)m(Nb1-z-uTaz-Zru)O3 (wherein, x, y, z, w, v, u and m in the formula satisfy the following conditions respectively: 0.4

Abstract translation: 一种具有环境友好性的压电陶瓷，其包含作为主要成分的组合物，其由不含铅（Pb）作为构成元素的复合氧化物组成，并且具有优异的压电特性，例如相对介电常数，机电耦合系数和压电常数 ，以及使用该压电陶瓷的压电元件。 包含由以下通式表示的组合物作为主要成分的压电陶瓷：（K1-xyw-vNaxLiyBawSrv）m（Nb1-z-uTaz-Zru）O3（其中，x，y，z，w，v，u和 m分别满足以下条件：0.4