PIEZOELECTRIC CERAMIC COMPOSITIONS

摘要

Piezoelectric ceramic compositions having very high mechanical quality factors, high electromechanical coupling coefficients and high durabilities of the piezoelectric constants with cycling of mechanical impact, and comprising the quaternary system Pb(Zn1/3Nb2/3)O3 -Pb(Sn1/3Nb2/3)O3-PbTiO3-PbZrO3 and containing a quantity of manganese equivalent to from 0.05 to 5 weight % of MnO2.