| 摘要 |
A piezoelectric element comprising: a ceramic substrate (2), a piezoelectric portion (1) made of a piezoelectric ceramic composition containing a PbMg1/3Nb2/3O3-PbZrO3-PbTiO3 ternary system solid solution composition having an average particle diameter of 1 - 10 mu m with a maximum particle diameter being 5 times as large as the average particle diameter or less and being represented by the following general formula (1) as a main component and 0.05 to 10.0 mass% of NiO, and an electrode (3). 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. Pbx(Mgy/3Nb2/3)aTibZrcO3 wherein 0.95</=x</=1.05; 0.8</=y</=1.0; a, b and c are decimals falling in a range surrounded by (a,b,c) = (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 the a, b and c, and a+b+c = 1.00. <IMAGE> <IMAGE> |
