| 摘要 |
This invention provides a piezoelectric ceramic composition that does not contain lead, can be sintered at a normal pressure and has a high electro-mechanical coupling coefficient and a small dielectric loss, its production method, and a piezoelectric device utilizing the piezoelectric ceramic composition. The invention relates to a piezoelectric composition containing a compound expressed by the general formula {Li x (K 1-y Na y ) 1-x } (Nb 1-z Ta z )O 3 , each of x, y and z respectively falling within composition range of 0 ‰¦ x ‰¦ 0.2, 0 ‰¦ y ‰¦ 1.0 and 0 ‰¦ z ‰¦ 0.4, as its main component, and further containing nickel or a nickel-containing compound. To provide a piezoelectric device that does not contain lead, can be sintered at a normal pressure and has a high electro-mechanical coupling coefficient Kp and a small dielectric loss, the piezoelectric ceramic composition of the invention is expressed by the general formula (Li x (K 1-y Na y ) 1-x }(Nb 1-z-n Ta z (Mn 0.5 W 0.5 ) n O 3 , each of x, y, z and n respectively falling within a composition range of 0 ‰¦ x ‰¦ 0.2, 0 ‰¦ y ‰¦ 1.0, 0 ‰¦ z ‰¦ 0.4 and 0 < n ‰¦ 0.1. |
