探讨了Nb2O5、NiO、Fe2O3掺杂量对三元系PMS-PZ-PT陶瓷的微观结构和电性能的影响.实验结果表明:随着掺杂量的增加,有一个共同的规律:物相组成由四方相向三方相转变;掺杂物在PMS-PZ-PT材料准同型相界区的固溶度比较小;适当的少量掺杂使εr、d33、Kp,等都有所提高.所不同的是,少量硬性掺杂和取代能提高Qm,而软性掺杂材料的Qm值却随着掺杂量的增加一直下降.改性后的组分具有良好的压电性能,能更好的满足超声马达实际使用的要求.
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