Electronic Materials Letters

The Korean Institute of Metals and Materials (대한금속재료학회)
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High Temperature Capacitors using a $BiScO_3-BaTiO_3-(K_{1/2}Bi_{1/2})TiO_3$ Ternary System

  • Lim, Jong-Bong (Nano. Functional Materials Group, Korea Institute of Materials Science) ;
  • Zhang, Shujun (Material Research Institute, Pennsylvania State University) ;
  • Shrout, Thomas R. (Material Research Institute, Pennsylvania State University)
  • Published : 2011.03.01
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Abstract

$BiScO_3-BaTiO_3$ with $(K_{1/2}Bi_{1/2})TiO_3$ [BSBT-KBTx] in the perovskite solid solution system were prepared by conventional ceramic processing for potential high temperature capacitors. The effect of KBT on the dielectric properties of BSBT was investigated as a function of temperature and frequency. The BSBT-KBT20 exhibited high dielectric permittivity and low dielectric loss over the temperature range from $100{^{\circ}C}$ to $300{^{\circ}C}$ with flat coefficients of temperature ($TC{\varepsilon}s$). In addition, BSBT-KBTx were observed to possess dielectric relaxation behavior at temperatures (> RT) as observed in lead-based relaxors. Furthermore, the E-field polarization behavior was investigated showing high energy density of $1.28 J/cm^3$ at 100 kV/cm for the BSBT-KBT20.

Keywords

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