Improvement of Dielectric Breakdown Strength in (1-x)Sr_0.7Ba_0.3Nb₂O₆-xSr_0.7Bi_0.2TiO₃ Ceramics

Abstract:

In this work, a series of (1-x)Sr_0.7Ba_0.3Nb₂O₆-xSr_0.7Bi_0.2TiO₃ ceramics were formulated by a phase-mixed sintering, the microstructure and energy storage performance were studied. The introduction of SBT induces the formation of equiaxed crystals leading to the denser microstructure, thus improving the dielectric breakdown strength. In addition, the enhancement of relaxor behavior improves the energy storage performance. For 0.94Sr_0.7Ba_0.3Nb₂O₆-0.06Sr_0.7Bi_0.2TiO₃, an energy storage density of 0.49J/cm³ and an efficiency of 94.2% were achieved.

• Periodical: Key Engineering Materials (Volume 842)
• Pages: 153-159
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.842.153
• Online since: May 2020
• Authors: Lei Cao, Ying Yuan*, En Zhu Li, Shu Ren Zhang
• Keywords: Dielectric Breakdown Strength, Energy Storage, Tetragonal Tungsten Bronze

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