| 摘要 |
For the purpose of preventing the degradation of the piezoelectric strain properties when Cu is used for internal electrodes, there is provided a piezoelectric ceramic composition including: a composite oxide, as a main constituent thereof, represented by (Pb a- b Me b) [ (Zn1/3Nb2/3)x Ti y Zr z]O3 with the proviso that 0.96 .ltoreq. a .ltoreq. 1.03, 0 5 b .ltoreq. 0.1, 0.05 .ltoreq. x .ltoreq. 0.15, 0.25 .ltoreq. y .ltoreq. 0.5, 0.35 .ltoreq. z .ltoreq. 0.6, and x + y + z = 1, and Me represents at least one selected from Sr, Ca and Ba; and at least one selected from Co, Mg, Ni, Cr and Ga as a first additive to the main constituent in a content of 0.5% by mass or less (not inclusive of 0) in terms of oxide, wherein an electrode made of Cu is to be disposed on the piezoelectric ceramic composition.
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