| US 7,525,239 B2 | ||
| Piezoelectric element, and liquid jet head and ultrasonic motor using the piezoelectric element | ||
| Katsumi Aoki, Yokohama (Japan); Kenichi Takeda, Yokohama (Japan); Tetsuro Fukui, Yokohama (Japan); and Hiroshi Funakubo, Yokohama (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan); and Tokyo Institute of Technology, Tokyo (Japan) | ||
| Filed on Sep. 10, 2007, as Appl. No. 11/852,878. | ||
| Claims priority of application No. 2006-250601 (JP), filed on Sep. 15, 2006. | ||
| Prior Publication US 2008/0067898 A1, Mar. 20, 2008 | ||
| Int. Cl. H01L 41/187 (2006.01); H01L 41/24 (2006.01) | ||
| U.S. Cl. 310—358 [501/134; 252/62.9 PZ; 252/62.9 R; 257/347] | 5 Claims |
| 1. A piezoelectric element having, a piezoelectric body and a pair of electrodes which are in contact with the piezoelectric
body,
wherein the piezoelectric body consists of a perovskite type oxide represented by the following formula (1):
(Bi,Ba)(M,Ti)O3 (1)
in which M is an atom of one element selected from the group consisting of Mn, Cr, Cu, Sc, In, Ga, Yb, Al, Mg, Zn, Co, Zr,
Sn, Nb, Ta and W, or a combination of the atoms of the plurality of elements, and
wherein the piezoelectric body is a piezoelectric body in which crystal phases of at least two of tetragonal structure, rhombohedral
structure, pseudo-cubic structure, rhombic system and monoclinic structure are mixedly present.
|