| 专利名称： | PIEZOELECTRIC CERAMIC AND PIEZOELECTRIC ELEMENT |
| 公开（告）号： | |
| 公开（公告）日： | 2008-07-03 00:00:00 |
| 申请（专利）号： | WO2008078703 |
| 申请日： | 2007-12-21 00:00:00 |
| 发明（设计）人： | KYOCERA CORP (JP)FUKUOKA SHUUICHI (JP) |
| (申请)专利权（人）： | FUKUOKA SHUUICHI (JP) |
| 内容： | [PROBLEMS] To provide a piezoelectric ceramic, which has a large piezo dynamic d33 constant, can be used even under an elevated temperature of 200 C, and the change between the dynamicd33 constant at room temperature and the dynamic d33 constant at 200 C is small, and a piezoelectric element. [MEANS FOR SOLVING PROBLEMS] A piezoelectric ceramic characterized by comprising 100 parts by mass of a bismuth layered compound as a main component and 0.05 to 1 part by mass in total in terms of oxides (MnO2 and Fe2O3) of at least one of Mn and Fe, the bismuth layered compound being represented by a compositional formula of Bi4Ti3O12 ss[(1-?M1TiO3 ?M2M3O3] wherein 0.405 = ss = 0.498; 0 = ? = 0.3; M1 represents at least one of Sr, Ba, Ca, (Bi0.5Na0.5), (Bi0.5Li0.5), and (Bi0.5K0.5); M2 is at least one of Bi, Na, K, and Li; and M3 is at least one of Fe and Nb. |
发布日期：2008-11-14 11:07:00