| 专利名称： | Piezoelectric ceramic composition and piezoelectric device |
| 公开（告）号： | |
| 公开（公告）日： | 2006-12-07 00:00:00 |
| 申请（专利）号： | US20050559740；US2006273697 |
| 申请日： | 2005-12-06 00:00:00 |
| 发明（设计）人： | |
| (申请)专利权（人）： | HIROSE MASAKAZU (JP) |
| 内容： | A piezoelectric ceramic composition excellent in heat resisting properties is provided. In the piezoelectric ceramic composition including a perovskite compound containing Pb, Zr and Ti as main components, the piezoelectric ceramic composition is made to include Cr as an additive from 0.025 to 0.250 wt % in terms of Cr2O3. In the piezoelectric ceramic composition of the present invention, Deltak15 (here, Deltak15 is the rate of change in electromechanical coupling factor k15, caused by external thermal shock), of the piezoelectric ceramic composition can be controlled to 3.0% or less in absolute value. |
发布日期：2007-07-13 10:11:00