Structure, dielectric, ferroelectric, and energy density properties of (1???em class="a-plus-plus">x)BZT-em class="a-plus-plus">xBCT ceramic capacitors for energy storage applications

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• 作者：Venkata Sreenivas Puli (1)
  Dhiren K. Pradhan (1)
  Douglas B. Chrisey (2)
  M. Tomozawa (2)
  G. L. Sharma (1)
  J. F. Scott (3)
  Ram S. Katiyar (1)
  
• 刊名：Journal of Materials Science
• 出版年：2013
• 出版时间：March 2013
• 年：2013
• 卷：48
• 期：5
• 页码：2151-2157
• 全文大小：541KB
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• 作者单位：Venkata Sreenivas Puli (1)
  Dhiren K. Pradhan (1)
  Douglas B. Chrisey (2)
  M. Tomozawa (2)
  G. L. Sharma (1)
  J. F. Scott (3)
  Ram S. Katiyar (1)
  
  1. Department of Physics and Institute for Functional Nano Materials, University of Puerto Rico, San Juan, PR, 00936, USA
  2. Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180-3590, USA
  3. Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB0 3HE, UK
  
• ISSN：1573-4803

文摘

We investigate the dielectric, ferroelectric, and energy density properties of Pb-free (1???em class="a-plus-plus">x)BZT-em class="a-plus-plus">xBCT ceramic capacitors at higher sintering temperature (1600?°C). A significant increase in the dielectric constant, with relatively low loss was observed for the investigated {Ba(Zr0.2Ti0.8)O3}(1?em class="a-plus-plus">x ){(Ba0.7Ca0.3)TiO3} x (x?=?0.10, 0.15, 0.20) ceramics; however, electric breakdown was low (~140, 170, 134?kV/cm), and of which room temperature (300?K) charging curve energy density values are largest ~0.88, 0.94, and 0.87?J/cm3 with maximum high dielectric constant values ~7800, 8400, and 5200, respectively. Bulk ceramic BZT–BCT materials have shown interesting energy densities with good energy storage efficiency (~72?%) at high sintering temperature; they might be one of the strong candidates for high energy density capacitor applications in an environmentally protective atmosphere.