| 摘要 |
PURPOSE:To obtain a piezoelectric porcelain small in mechanical quality coefficient Qm value and excellent in heat resistance, especially a piezoelectric porcelain flat in group delay time characteristics, little in phase distortion, and suitable as a filter raw material capable of corresponding to surface packaging. CONSTITUTION:Mn is thermally diffused in a piezoelectric porcelain having a composition represented by general formula: Pb{(SbaSn1-a)xZryTi1-x-y}O3 wherein 0<a<1, 0<=x0.10, 0.36<=y<=0.54, up to 8.0mol.% of Pb atoms being substituted with at least one kind selected from Ca, Sr, and Ba, and at least one kind selected from Cr, Nb, W and Ta being added in an amount of 0.03-0.30wt.% converted into Cr2O3, Nb2O5, WO3, or Ta2O5. |
