Dielectric Properties of Low-Temperature Sintered
0.5Ba(Zr0.2Ti0.8)O3 – 0.5(Ba0.7Ca0.3)TiO3 Ceramics

Abstract

The lead-free 0.5Ba (Zr0.2Ti0.8) O3 – 0.5(Ba0.7Ca0.3)TiO3 have been prepared by conventional solid state reaction technique. The phase pure BZT-BCT can be prepared at 1250◦C. The synthesized powder can be sintered to around 98% of the theoretical density at a temperature as low as 1200◦C by adding a mixture of Li2CO3 and Bi2O3as a sintering aid which may form LiBiO2 in-situ, whereas the conventional sintering temperature is around 1400◦C. Interestingly, the dielectric properties of such low-temperature sintered samples are on a par with BZT-BCT samples prepared via conventional sintering at a high temperature. It is also found that the addition of additive shifts the relative permittivity peak maxima towards room temperature.