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Effects of Nb5+ doping on sintering and electrical properties of lead-free (Bi0.5Na0.5)TiO3 ceramics

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Abstract

The Nb5+ doped (Bi0.5Na0.5)TiO3 (BNT) ceramics were manufactured by a conventional solid state reaction method. The influence of Nb5+ doping on the sintering, microstructure and various electrical properties of BNT ceramics was investigated. The results of X-ray diffraction show that the solubility limit of Nb5+ in the BNT lattice is less than 3%. Additionally, Nb5+ doping produces significant effects on the densification and grain growth of BNT ceramics. Various electrical properties of BNT ceramics are obviously changed with doping a small amount of Nb5+. The ferroelectric and piezoelectric properties display enhanced values at a low doping level. The formation of A-site vacancies is considered as the reason for the changed ferroelectric and electromechanical behavior.

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Acknowledgments

This work was financially supported by HFUT RenCai Foundation (No. 103-035006, No.103-035034), and by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, and an open fund of State Key Laboratory of New Ceramics and Fine Processing (Tsinghua University).

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Authors and Affiliations

  1. Institute of Electro Ceramics & Devices, School of Materials Science and Engineering, Hefei University of Technology, 230009, Hefei, People’s Republic of China

    Ruzhong Zuo, Hongqiang Wang & Bing Ma

  2. State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, 100084, Beijing, People’s Republic of China

    Longtu Li

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  1. Ruzhong Zuo
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  2. Hongqiang Wang
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  3. Bing Ma
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  4. Longtu Li
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Correspondence to Ruzhong Zuo.

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Zuo, R., Wang, H., Ma, B. et al. Effects of Nb5+ doping on sintering and electrical properties of lead-free (Bi0.5Na0.5)TiO3 ceramics. J Mater Sci: Mater Electron 20, 1140–1143 (2009). https://doi.org/10.1007/s10854-008-9840-9

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  • DOI: https://doi.org/10.1007/s10854-008-9840-9

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