| 发明名称 | Piezoelectric ceramic comprising an oxide and piezoelectric device | ||
| 摘要 | 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<x≦0.7; 0.02≦y≦0.1; 0<z≦0.3; 0<w≦0.01; 0.04≦v≦0.07; 0.04≦u≦0.07; and 0.95≦m<1). | ||
| 申请公布号 | US9105845(B2) | 申请公布日期 | 2015.08.11 |
| 申请号 | US201213712426 | 申请日期 | 2012.12.12 |
| 申请人 | TDK CORPORATION | 发明人 | Sone Hideaki;Azuma Tomohisa;Furukawa Masahito;Ueda Satoko |
| 分类号 | H01L41/187;C04B35/495;H01L41/083 | 主分类号 | H01L41/187 |
| 代理机构 | Oliff PLC | 代理人 | Oliff PLC |
| 主权项 | 1. A piezoelectric ceramic comprising a composition represented by the following general formula (1) as the main component, (K1-x-y-w-vNaxLiyBawSrv)m(Nb1-z-uTaz-Zru)O3 (1) wherein, x, y, z, w, v, u and m in the formula (1) are satisfying the following conditions respectively, 0.4<x≦0.7, 0.02≦y≦0.1, 0<z≦0.3, 0<w≦0.01, 0.04≦v≦0.07, 0.04≦u≦0.07, and 0.95≦0.975. | ||
| 地址 | Tokyo JP | ||