Microstructure and Dielectric Properties of Nickel-Doped Ba0.7Sr0.3TiO3 Ceramics Fabricated by Solgel Method.

A study of phase transition, microstructure, and dielectric properties of Ba_0.7Sr_0.3Ti_{1- x}Ni _xO₃ ( BSTN) ceramics prepared by slow-injection solgel technique with x ranging from 0 to 1 mol% is reported in this article. The as-prepared BSTN material was calcined at 800 and 1000°C and subsequently sintered at 1100 and 1200°C, respectively. The optimized condition was found to be Ba_0.7Sr_0.3TiO₃ doped with 1 mol% nickel calcined at 1000°C and sintered at 1200°C having the lowest dielectric loss of 0.02 with a dielectric constant of 1603 which was measured at a frequency of 1 kHz at room temperature. [ABSTRACT FROM AUTHOR]