| 摘要 |
PURPOSE:To provide a piezoelectric porcelain compsn. having a high electromechanical coupling factor and high heat resistance and undergoing little change with the lapse of time. CONSTITUTION:This piezoelectric porcelain compsn. consists of a base represented by a formula aPb(Yb1/2Nb1/2)O3-bPb(Mg1/2W1/2)O3-cPbTiO3-dPbZrO3 (where 0.01<=a<=0.20, 0.01<=b<=0.20, 0.20<=c<=0.70, 0.28<=d<=0.98 and a+b+c+d=1) and 0.02-2.00wt.% MnO2 as a secondary component. |
