| 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 äLix(K1-yNay)1 -xü(Nb1-zTazüO3, 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 äLix(K1 -yNay)1-xü(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. |
