Piezoelectric ceramic material and monolithic piezoelectric transducer employing the ceramic material

摘要

A piezoelectric ceramic material which can suppress segregation of a W compound or a W oxide in W-containing sintered PbTiO3 and a piezoelectric transducer employing the ceramic material. The ceramic material contains lead titanate as a primary component; an Mn-containing oxide or an Mn-containing compound and a W-containing compound or a W-containing oxide as secondary components; and an Si-containing oxide or an Si-containing compound as an additional component. Alternatively, the piezoelectric ceramic material contains a primary component containing PbTiO3 and Pb(MnyW(1-y))O3 and additionally SiO2 or PbSiO3.