Semiconductor/relaxor 0-3 type composites without thermal depolarization in Bi₀.₅Na₀.₅TiO₃-based lead-free piezoceramics

Nature Communications
Ji ZhangYan-Feng Chen

Abstract

Commercial lead-based piezoelectric materials raised worldwide environmental concerns in the past decade. Bi₀.₅Na₀.₅TiO₃-based solid solution is among the most promising lead-free piezoelectric candidates; however, depolarization of these solid solutions is a longstanding obstacle for their practical applications. Here we use a strategy to defer the thermal depolarization, even render depolarization-free Bi₀.₅Na₀.₅TiO₃-based 0-3-type composites. This is achieved by introducing semiconducting ZnO particles into the relaxor ferroelectric 0.94Bi₀.₅Na₀.₅TiO₃-0.06BaTiO₃ matrix. The depolarization temperature increases with increasing ZnO concentration until depolarization disappears at 30 mol% ZnO. The semiconducting nature of ZnO provides charges to partially compensate the ferroelectric depolarization field. These results not only pave the way for applications of Bi₀.₅Na₀.₅TiO₃-based piezoceramics, but also have great impact on the understanding of the mechanism of depolarization so as to provide a new design to optimize the performance of lead-free piezoelectrics.

References

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Citations

Nov 1, 2016·ACS Applied Materials & Interfaces·Xiang LvJianguo Zhu
Feb 25, 2017·Journal of the American Chemical Society·Mao-Hua ZhangJing-Feng Li
Jun 24, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Ji ZhangShan-Tao Zhang
Oct 27, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Wangfeng BaiZhenguo Ji
Jan 9, 2020·Chemical Society Reviews·Xiang LvJiagang Wu
Jul 3, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Ling LiShan-Tao Zhang
Feb 1, 2016·Chemical Science·Lihong LiXianran Xing
Nov 12, 2020·Scientific Reports·Julio Cesar Camilo Albornoz DiazPaulo Sergio da Silva
Feb 3, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Duanduan LiuZhigang Zou
Apr 8, 2021·ACS Applied Materials & Interfaces·Xiaole YuMankang Zhu
Jul 25, 2021·Advanced Materials·Changhao ZhaoJürgen Rödel
Aug 15, 2018·ACS Applied Materials & Interfaces·Xiang LvJianguo Zhu
Oct 20, 2018·ACS Applied Materials & Interfaces·Fang-Zhou YaoJing-Feng Li

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