| 专利名称： | High energy density piezoelectric ceramic materials |
| 公开（告）号： | |
| 公开（公告）日： | 2007-04-19 00:00:00 |
| 申请（专利）号： | US20050252923(US2007087930) |
| 申请日： | 2005-10-18 00:00:00 |
| 发明（设计）人： | UNIV TEXAS (US) |
| (申请)专利权（人）： | PRIYA SHASHANK (US) |
| 内容： | The present invention includes methods, devices, and compositions having improved piezoelectric characteristics with high energy density. Compositions of the present invention are ceramic materials of the formula: Pb[(Zr0.52Ti0.48)O3]1-x[(Zn1/3Nb2/3)O3]x+Mn, where x is 0.05 to 0.20 and Mn is manganese in a form that is present from about 0.1 to 1.5 wt %. Suitable manganese forms include MnCO3, MnO2, MnO, and Mn3O4. The compositions exhibit a high product of piezoelectric voltage constant and piezoelectric stress constant. The compositions are polycrystalline or textured with a dense microstructure and small grain. The piezoelectric voltage constant and piezoelectric stress constant obtained from such compositions are superior to those of conventional hard or soft ceramics and yield a magnitude product of the piezoelectric voltage constant and piezoelectric stress constant that is significantly higher than those reported in the literature or in available with commercial or conventional ceramic compositions. |
发布日期：2007-08-27 10:10:00