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Journal of Electroceramics

, Volume 21, Issue 1–4, pp 573–576 | Cite as

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

  • Min Dong
  • Hongyan Miao
  • Guoqiang Tan
  • Yongping Pu
Article

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.

Keywords

Barium titanate Hydrothermal Doping Mg 

Notes

Acknowledgements

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

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Min Dong
    • 1
  • Hongyan Miao
    • 1
  • Guoqiang Tan
    • 1
  • Yongping Pu
    • 2
  1. 1.School of Materials Science and EngineeringShaanxi University of Science and TechnologyXianyangPeople’s Republic of China
  2. 2.State Key Laboratory of Electrical Insulation for Power EquipmentXi’an Jiaotong UniversityXi’anPeople’s Republic of China

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