Patent ID: 6610427
Filing Date: 2003-08-26
Classification: H01L

Abstract:
A piezoelectric element comprising:a ceramic substrate, a piezoelectric portion made of a piezoelectric ceramic composition containing a Pb(Mg, Ni)1/3Nb2/3O3â€”PbZrO3â€”PbTiO3 ternary system solid solution composition being represented by the following general formula (1) as a main component, and an electrode; wherein said electrode is electrically connected to said piezoelectric portion, and said piezoelectric portion is solidly attached to the ceramic substrate directly or via said electrode; Pbx{(Mg1-yNiy)1/3Ã—aNb2/3}bTicZrdO3â€ƒâ€ƒ(1) wherein 0.95&lE;x&lE;1.05; 0.05&lE;y&lE;0.20; 0.90&lE;a&lE;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.