IMF2017

This work reports the effect of sintering temperature on dielectric and ferroelectric behavior of Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃ or BCZT ceramic prepared by sol-gel auto combustion method. The BCZT ceramic exhibited large dielectric permittivity in the range of 5000-5900 at room temperature. The maximum dielectric permittivity of all samples decreased with increasing frequency coupled with accompanying shift in the temperature at maximum dielectric permittivity which confirmed its relaxor behavior. Ferroelectric hysteresis loop (P-E loop) as a function of temperature was also investigated. At room temperature, the slim P-E loop was observed and remnant polarization (P_r) was closed to zero but at low enough temperature, a large P-E loop with the P_r value of 20 mm/cm² was observed. The bulk density, grain size and ferroelectric properties increased with the increasing in sintering temperature. In addition, the characterization of the effect of sintering temperature on the relaxor ferroelectric behavior was discussed in terms of the Curie-Weiss law and Volger-Fulcher law.