Structure, dielectric, ferroelectric, and energy density properties of (1-x)BZT-xBCT ceramic capacitors for energy storage applications

作者：Puli Venkata Sreenivas^*; Pradhan Dhiren K; Chrisey Douglas B; Tomozawa M; Sharma G L; Scott J F; Katiyar Ram S

来源：Journal of Materials Science, 2013, 48(5): 2151-2157.

DOI：10.1007/s10853-012-6990-1

We investigate the dielectric, ferroelectric, and energy density properties of Pb-free (1 - x)BZT-xBCT ceramic capacitors at higher sintering temperature (1600 A degrees C). A significant increase in the dielectric constant, with relatively low loss was observed for the investigated {Ba(Zr0.2Ti0.8)O-3}((1-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/cm(3) 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.

• 出版日期2013-3