研究了软性Nb2O5掺杂对PMS-PZ-PT三元系压电陶瓷温度稳定性能的影响.实验结果表明,适量的掺杂不仅能优化体系的压电性能,而且改善了体系的温度稳定性.改性后的三元系陶瓷频移小,机电耦合系数K31的温度稳定性较好,同时压电常数d31温度稳定性也得到了改善,能满足超声马达等器件对压电陶瓷材料性能的要求.
The influences of Nb-doping on the temperature stability of PMS-PZ-PT ternary system ceramics were investigated. The stable temperature dependence of resonance frequency, electromechanical coupling coefficient K31 and piezoelectric constant d31 were measured. Results show that the donor dopants can not only optimize piezoelectric properties of the system, but also improve the temperature stability. So the modified PMS-PZ-PT ceramics can achieve the requirements for high-power piezoelectric devices such as ultrasonic motors.
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