Abstract
The piezoelectric characteristics of (Sr0.2Ca0.8)1-xNd2x/3Bi2Ta2O9+y mass%MnCO3 ceramics were examined. The samples were prepared by conventional sintering technique at 1190°C to 1250°C for 2h. The Curie temperature of samples gradually decreased from 631°C to 550°C when x increased. In the sample with (x, y)=(0.2, 0.2), the maximum value of mechanical quality factor Qm was obtained, approximately 27000, and phase curve showed no spurious in thickness extensional vibration mode (t-mode).
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