Abstract: In this paper, the theoretical basis of high mechanical quality factor (Qm) piezoelectric ceramic materials is elaborated from the physical mec-hanism, Qm and its influencing factors such as grain size, lattice constant, domain wall motion and space charge, etc. Then several systems and research status of high Qm piezoelectric ceramics are introduced. It is pointed out that doping modification, exploring new systems and processes are effective ways to improve the high Qm of piezoelectric ceramic materials.Finally, the article gives a brief introduction to high Qm piezoelectric ceramic devices.
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