The Structure and Properties of Multi-cations Doped KNN-based Piezoelectric Ceramics

Abstract

The piezoelectric strain of K_0.5Na_0.5NbO₃-based lead-free ceramic at different temperatures was studied. The Rayleigh analysis shows that the intrinsic and extrinsic contributions are increased at temperature from 173 to 298 K. In addition, a monoclinic phase structure was observed at 83 K. The results of phase field simulation show that the temperature dependent microstructure evolution is a function of the local structure size. This work contributes to understanding the structure and properties relationship of the multi-cations doped KNN-based piezoelectric ceramics as a function of temperature.

Keywords

microstructure evolution / phase structure / monoclinic phase / strain behavior

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