| 摘要 |
PROBLEM TO BE SOLVED: To obtain a piezoelectric porcelain compsn. having improved sinterability and uniformity in sintering reaction and giving a grain diameter fit frequency used by incorporating CuO and MnO2 as subsidiary components into a compd. contg. Pb, Ti, Nd, Pt and Sm as a base. SOLUTION: This piezoelectric porcelain compsn. is based on a compd. represented by the formula (0.01<=x<=0.40, 0<α<1, 0<=β<1, 0<=γ<1 and α+β+γ=1) and contains CuO and MnO2 as subsidiary components by 0.05-2.5 wt.% and 0.05-2.0 wt.%, respectively, based on 1 mol of the base. It is excellent in sinterability, does not cause transition from triple wave oscillation to quintuple wave oscillation in thickness longitudinal vibration and can improve the temp. characteristics of the resonance frequency of fundamental waves in glide vibration. When ZrO2 is further incorporated as a subsidiary component, the grain diameter of the resultant sintered compact can be controlled. |
