Importance

Loading Importance Indicators...

Abstract

A piezoelectric element includes: a ceramic substrate, an electrode and a piezoelectric portion made of a piezoelectric ceramic composition containing a Pb(Mg, Ni).sub.1/3 Nb.sub.2/3 O.sub.3 --PbZrO.sub.3 --PbTiO.sub.3 ternary system solid solution composition being represented by the following general formula (1) as a main component: Pb.sub.x {(Mg.sub.1-y Ni.sub.y).sub.1/3.times.a Nb.sub.2/3 }.sub.b Ti.sub.c Zr.sub.d O.sub.3 (1), wherein 0.95.ltoreq.x.ltoreq.1.05; 0.05.ltoreq.y.ltoreq.0.20; 0.90.ltoreq.a.ltoreq.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.

Loading the Abstract Image...

First Claim