Patent ID: 6731049
Filing Date: 2004-05-04
Classification: H01L,Y10T

Abstract:
A piezoelectric element comprising:a ceramic substrate; a piezoelectric portion made of a piezoelectric ceramic composition containing a PbMg1/3Nb2/3O3â€”PbZrO3â€”PbTiO3 ternary system solid solution composition having an average particle diameter of 1-10 &mgr;m with a maximum particle diameter being not more than 5 times as large as the average particle diameter 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; 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(Mgy/3Nb2/3)aTibZrcO3â€ƒâ€ƒ(1) wherein 0.95&lE;x&lE;1.05; 0.8&lE;y&lE;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 said a, b and c, and a+b+c=1.00.