| 专利名称： | PIEZOELECTRIC CERAMIC MATERIAL |
| 公开（告）号： | |
| 公开（公告）日： | 2006-12-07 00:00:00 |
| 申请（专利）号： | JP2005153541 （ JP2006327863） |
| 申请日： | 2005-05-26 00:00:00 |
| 发明（设计）人： | HONDA ELECTRONIC CO LTD |
| (申请)专利权（人）： | TO TONSHAKU ; HAMAGUCHI YUKI |
| 内容： | The invention provides a piezoelectric ceramic material comprising a Bi3TiNbO9 crystal and/or an MBi2Nb2O9 crystal which are each a bismuth layer compound, where M represents at least one element selected from Sr, Ba and Ca. The ceramic material contains Bi, Ti, M and Nb as main component elements. The molar ratio as oxides of the main component elements is given by (Bi3-xMx)z (Nb1+yTi1-y)O9 provided that 0 < x, y <= 0.8 and 0.95 <= z <= 1.05. When the molar ratio of Ba/(M + Bi) is given by xB/3 and the molar ratio of Ca/(M + Bi) is given by xC/3, it is required that 0 <= xB <= 0.5 and 0 <= xC < 0.4. This piezoelectric ceramic material, free from any lead whatsoever, has a sufficiently high Curie point, and exhibits ever more improved piezoelectric properties. |
发布日期：2007-07-13 11:27:00