| 摘要 |
A piezoelectric element includes: a ceramic substrate, an electrode and a piezoelectric portion made of a piezoelectric ceramic composition containing a Pb(Mg, Ni)1/3Nb2/3O3-PbZrO3-PbTiO3 ternary system solid solution composition being represented by the following general formula (1) as a main component: Pbx{(Mg1-yNiy)1/3xaNb2/3}bTicZrdO3 (1), wherein 0.95<=x<=1.05; 0.05<=y<=0.20; 0.90<=a<=1.10; b,c, and d are decimals falling in a range surrounded by (b, c, d)=(0.550, 0.425, 0.025), (0.550, 0.325, 0.125), (0.375, 0.325, 0.300), (0.100, 0.425, 0.475), (0.100, 0.475, 0.425) and (0.375, 0.425, 0.200) in the coordinates with coordinate axes of said b, c and d, and b+c+d=1.000. The electrode is electrically connected to the piezoelectric portion, and the piezoelectric portion is solidly attached to the ceramic substrate directly or via the electrode. |
