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

Zhang, Ji and Pan, Zhao and Guo, Fei-Fei and Liu, Wen-Chao and Ning, Huanpo and Chen, Y. B. and Lu, Ming-Hui and Yang, Bin and Chen, Jun and Zhang, Shan-Tao and Xing, Xianran and Rödel, Jürgen and Cao, Wenwu and Chen, Yan-Feng (2015):
Semiconductor/relaxor 0–3 type composites without thermal depolarization in Bi0.5Na0.5TiO3-based lead-free piezoceramics.
In: Nature Communications, pp. 6615(1-10), 6, ISSN 2041-1723, [Online-Edition: http://dx.doi.org/10.1038/ncomms7615],
[Article]

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.

Item Type: Article
Erschienen: 2015
Creators: Zhang, Ji and Pan, Zhao and Guo, Fei-Fei and Liu, Wen-Chao and Ning, Huanpo and Chen, Y. B. and Lu, Ming-Hui and Yang, Bin and Chen, Jun and Zhang, Shan-Tao and Xing, Xianran and Rödel, Jürgen and Cao, Wenwu and Chen, Yan-Feng
Title: Semiconductor/relaxor 0–3 type composites without thermal depolarization in Bi0.5Na0.5TiO3-based lead-free piezoceramics
Language: English
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.

Journal or Publication Title: Nature Communications
Volume: 6
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 20 Mar 2015 11:52
Official URL: http://dx.doi.org/10.1038/ncomms7615
Identification Number: doi:10.1038/ncomms7615
Funders: This work was supported by the State Key Program for Basic Research of China (2013CB632900 and 2015CB921203) and the National Nature Science Foundation of China (U1432112 and 21322102).
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