Synthesis and characterizations of NaNbO3 modified 0.92BaTiO3–0.08K0.5Bi0.5TiO3 ceramics for energy storage applications

  • Jing WanEmail author
  • Yongping Pu
  • Chiyuan Hui
  • Chenwei Cui
  • Yisong Guo


In this work, (1 − x)(0.92BaTiO3–0.08K0.5Bi0.5TiO3)–xNaNbO3 (0 ≤ x ≤ 0.08) [(1 − x)BTKBT–xNN] ceramics were prepared by using conventional solid state reaction method. Phase composition, microstructures, and energy storage properties were investigated. X-ray diffraction analysis for all samples showed that the tetragonal symmetry structure of the (1 − x)BTKBT–xNN ceramics. It was found that the tetragonal phase content decreases with increasing NN content. Variation of \({\text{V}^{\prime}_{\text{Na}}} - {\text{V}_{\text{O}}^{\cdot \cdot}} - {\text{V}^{\prime}_{\text{Na}}}\) defect dipole concentration leads to the average grain size of the (1 − x)BTKBT–xNN ceramics reduces from 1.49 to 0.90 µm during sintering process. The 0.92BTKBT–0.08NN ceramic sample exhibits to processes the largest energy storage density of 1.96 J/cm3 with energy storage efficiency about 67.4% at breakdown strength 22 kV/mm.



This research was supported by the National Natural Science Foundation of China (51372144, 51641207), and the Key Program of Innovative Research Team of Shaanxi Province (2014KCT-06).


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Authors and Affiliations

  1. 1.School of Materials Science and EngineeringShaanxi University of Science and TechnologyXi’anChina

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