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Ferroelectric and piezoelectric properties of tungsten doped CaBi4Ti4O15 ceramics

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Abstract

Tungsten doped CaBi4Ti4O15 (CBT) ceramics was prepared by solid-state reaction method. A pure single phase of layer-structured ferroelectric with m = 4 was formed when x ≤ 0.025. The effect of W doping on dielectric, ferroelectric and piezoelectric properties was investigated. W6+ doping increased the temperature stability of dielectric constant and decreased dielectric loss. W6+ doping decreased the remanent polarization, while the coercive field decreased as well, as a result, the piezoelectric constant was increased. AC conductivity measurement showed that W6+ doping increased the conductivity of CBT ceramics and showed n-type conducting mechanism. W6+ doped ceramics has smaller activation energy due to many defects introduced in the crystal lattice.

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Acknowledgements

This work was supported by the Ministry of Sciences and Technology of China through 973-project (2002CB613307), National Natural Science Foundation China (NSFC No. 50572113), and the Innovation Project of Shanghai Institute of Ceramics (SCX200409).

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Authors and Affiliations

  1. The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People’s Republic of China

    Jiangtao Zeng, Ying Wang, Yongxiang Li, Qunbao Yang & Qingrui Yin

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  1. Jiangtao Zeng
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  2. Ying Wang
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  3. Yongxiang Li
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  4. Qunbao Yang
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  5. Qingrui Yin
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Correspondence to Yongxiang Li.

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Zeng, J., Wang, Y., Li, Y. et al. Ferroelectric and piezoelectric properties of tungsten doped CaBi4Ti4O15 ceramics. J Electroceram 21, 305–308 (2008). https://doi.org/10.1007/s10832-007-9144-0

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