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Effects of Mg-doping on the microstructure and properties of BaTiO3 ceramics prepared by hydrothermal method

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Abstract

Nanosized Mg-doped barium titanate powders were prepared at 240 °C by hydrothermal method using BaCl2·2H2O, TiCl4 and NaOH as the main reactants and MgCl2·6H2O as additive. The effects of Mg-doping on microstructure and properties of BaTiO3 ceramics were investigated by X-ray diffractometer (XRD), atomic emission spectrum (AES) and scanning electron microscopy (SEM) characterizations. As indicated by results, B site (Ti) is substituted by Mg. Mg-doping is helpful to get the microstructure with small grains and high density. Mg has evident function on shifting Curie peak. The value of ΔT c is −40 °C in the doping range of 0 to 0.15 wt%. When Mg/Ti atomic ratio is 0.06 in starting materials, the density reaches the maximum, relative dielectric constant reaches 4,100 and breakdown electric field rises up to 3.0 kV/mm.

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Acknowledgements

This work was supported by the National Nature Science Foundation of China (NSFC No. 50372039).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xianyang, 712081, People’s Republic of China

    Min Dong, Hongyan Miao & Guoqiang Tan

  2. State Key Laboratory of Electrical Insulation for Power Equipment, Xi’an Jiaotong University, Xi’an, 710049, People’s Republic of China

    Yongping Pu

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  1. Min Dong
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  2. Hongyan Miao
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  3. Guoqiang Tan
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  4. Yongping Pu
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Correspondence to Hongyan Miao.

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Dong, M., Miao, H., Tan, G. et al. Effects of Mg-doping on the microstructure and properties of BaTiO3 ceramics prepared by hydrothermal method. J Electroceram 21, 573–576 (2008). https://doi.org/10.1007/s10832-007-9254-8

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  • DOI: https://doi.org/10.1007/s10832-007-9254-8

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