Abstract
A (1-x)K0·5Na0·5NbO3-xBi(Zn0·5Zr0.5O3) was designed and prepared by a conventional ceramic fabrication method. The effects of doping amount on phase structure, microstructure and electrical properties were investigated. It was found that when the doping content x = 0.008, a multi-phase coexistence region is formed. In the area where the two phases coexistence, it showed the best piezoelectric performance (d33~238 pC/N) together with a high Curie temperature (Tc~316 °C). In addition, the scanning electron microscopy (SEM) revealed that the doping content has a significant effect on the grain size and density. Particularly, the d33 remains stable between room temperature and Tc. The temperature stability of the system is enhanced.
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