Dielectric and Energy Storage Properties of Ba0.65Sr0.35TiO3 Ceramics Modified by BiNbO4
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(1 − x) (Ba0.65Sr0.35TiO3)–xBiNbO4 (x = 0.0–0.15) ceramic were prepared by solid-state reaction method. The phase composition, microstructure, dielectric properties, polarization–electric field, breakdown strength and energy storage behaviors for the BiNbO4-modified Ba0.65Sr0.35TiO3 ceramics were investigated. With the addition of BiNbO4, the remnant polarization and saturation polarization decreased and the nonlinearity was suppressed. When x = 0.07, the maximum recoverable energy storage achieved was 0.5 J/cm3, 1.5 times that of un-doped Ba0.65Sr0.35TiO3 ceramics, with an efficiency of 96.89% and a breakdown electric field reaching 15.3 kV/mm. Therefore, BiNbO4 doping could improve the energy storage properties of Ba0.65Sr0.35TiO3 for high-energy pulse capacitor application.
KeywordsBa0.65Sr0.35TiO3 BiNbO4 energy storage capacitor breakdown strength
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This work was supported by the Innovation Foundation of Collaboration Center of Electronic Materials and Devices (No. ICEM2015-4002).
- 20.M. Wei, J. Zhang, K. Wu, H. Chen, and C. Yang, Int. J. Appl. Ceram. Technol. (2017). https://doi.org/10.1111/ijac.12775.