| 摘要 |
A piezoelectric material exhibiting a high Curie point and a high displacement at a low drive voltage is provided. The piezoelectric material contains as a main component a composite oxide and is expressed by the general formula [Pb{1-x1-x2-alpha(x1-x2)}, A1x1, A2x2]{(Tiy, Zrz) (1-beta(x1-x2)-gamma), (Y0.5, Nb0.5)gamma}O3, where y +z=1, 1.15 <z/y<1.30 and 0<gamma<0.1; and A1, A2, x1, x2 satisfy any of the conditions (i) A1 is at least selected one of Ce and La, A2 is K, 0.02<=x1<0.08, 0<=x2<=0.05 (0.02<=x1+x2<=0.1, x1<=x2) and alpha=0, beta=0.25 or alpha=0.5, beta=0, and (ii) A1 is Sr, A2 is Ba, 0.03 <=x1<=0.05, 0.03<=x2<=0.05 (|x1-x2|<=0.01), and alpha=0, beta=0.
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