发明名称 |
Piezoelectric ceramic and method of manufacturing the same |
摘要 |
A piezoelectric/electrostrictive device which exhibits an excellent piezoelectric characteristic and which has only a small dependence on a temperature is provided. The piezoelectric/electrostrictive device includes a piezoelectric/electrostrictive portion made of a piezoelectric ceramic, and electrodes electrically connected to the piezoelectric/electrostrictive portion. The piezoelectric ceramic reversibly transits to a tetragonal phase and an orthorhombic phase at a phase transition point as a boundary. The piezoelectric/electrostrictive portion is formed by a polarization treatment performed under the conditions that a treatment temperature ranges from a first temperature which exceeds the phase transition point of the piezoelectric ceramic to a second temperature which is 50° C. higher than the first temperature.
|
申请公布号 |
US7598659(B2) |
申请公布日期 |
2009.10.06 |
申请号 |
US20070685359 |
申请日期 |
2007.03.13 |
申请人 |
NGK INSULATORS, LTD. |
发明人 |
YURA YUKINOBU;YAMAGUCHI HIROFUMI;TANAKA RITSU |
分类号 |
H01L41/08;H01L41/257;H01L41/43 |
主分类号 |
H01L41/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|