| 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 electromechanical 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 {Lix(K1-yNay)1-x}(Nb1-zTaz)O3, 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 electromechanical coupling coefficient Kp and a small dielectric loss, the piezoelectric ceramic composition of the invention is expressed by the general formula {Lix(K1-yNay)1-x}(Nb1-z-nTaz(Mn0.5W0.5)nO3, 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.
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