| 摘要 |
PROBLEM TO BE SOLVED: To provide a compound piezoelectric body and a compound piezoelectric oscillator provided with elastic stiffness nearly equal to that of a plezoelectric element and high breaking toughness by forming them with zirconia fiber and a piezoelectric particle scat' tered in the zirconia fiber. SOLUTION: This piezoelectric body is the compound piezoelectric body 1 consisting of the zirconia fiber 3 and the piezoelectric particle 4 scattered in the zirconia fiber 3. Also, the compound piezoelectric oscillator is constituted by forming electrodes on both surfaces of the compound piezoelectric body 1 consisting of the zirconia fiber 3 and the piezoelectric particle 4 scattered in the zirconia fiber 3, respectively. Also, it is constituted by providing the piezoelectric element consisting of a piezoelectric layer and a pair of electrodes holding it between on the surface of the compound piezoelectric body 1 comprising the zirconia fiber 3 and the piezoelectric particle 4 scattered in the zirconia fiber 3. A dielectric constant is remarkably reduced without extremely deteriorating the piezoelectric effect of the electro/mechanical coupling coefficient, etc. Moreover, the breaking toughness is remarkably improved while keeping the elastic stiffness same as that of ceramics. |
