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Sintering and electrical properties of Nb5+ doped 0.63Bi(Mg1/2Ti1/2)O3–0.37PbTiO3 piezoelectric ceramics

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Abstract

Nb5+ doped 0.63Bi(Mg1/2Ti1/2)O3–0.37PbTiO3 (0.63BMT–0.37PT + xNb5+) ceramics have been fabricated by means of citrate sol–gel method and ordinary sintering. Effects of Nb5+ doping on the densification and various electrical properties were studied. The results indicated that the addition of a small amount of Nb5+ gradually changes the crystal structure from a typical rhombohedral-tetragonal coexisted structure to a nearly pure rhombohedral structure. A slight amount of secondary phases start to appear as the doping content of Nb5+ is more than 1.5 mol%, indicating that the solubility limit of Nb5+ in the matrix composition is reached. Moreover, electrical properties of the sintered ceramics were obviously changed based on the effect of densification and ionic substitution. 0.63BMT–0.37PT + 0.005Nb5+ ceramics sintered at 1,020 °C exhibit optimum properties of piezoelectric constant d33 ~ 245 pC/N, planar electromechanical coupling factor kp ~ 30 %, \( \varepsilon_{33}^{\text{T}} /\varepsilon_{\text{o}} \) ~ 1,220, and Tc ~ 460 °C.

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Acknowledgments

This work was financially supported by a project of Natural Science Foundation of Anhui Province (1108085J14), the National Natural Science Foundation of China (50972035), a Program for New Century Excellent Talents in University, State Education Ministry (NCET-08-0766) and 973 Program (No. 2009CB623301).

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Authors and Affiliations

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

    Xun Ji, Ruzhong Zuo & Wenwu Zuo

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

    Xiaohui Wang & Longtu Li

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  1. Xun Ji
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  2. Ruzhong Zuo
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  3. Wenwu Zuo
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  5. Longtu Li
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Correspondence to Ruzhong Zuo.

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Ji, X., Zuo, R., Zuo, W. et al. Sintering and electrical properties of Nb5+ doped 0.63Bi(Mg1/2Ti1/2)O3–0.37PbTiO3 piezoelectric ceramics. J Mater Sci: Mater Electron 23, 2162–2166 (2012). https://doi.org/10.1007/s10854-012-0733-6

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  • DOI: https://doi.org/10.1007/s10854-012-0733-6

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