The effects of sintering temperature and content of x on phase formation, microstructure and dielectric properties of (1−x)(Bi0.4871Na0.4871La0.0172TiO3)−x(BaZr0.05Ti0.95O3) ceramics prepared via the combustion technique

Abstract (1−x)(Bi0.4871Na0.4871La0.0172TiO3)−x(BaZr0.05Ti0.95O3) ceramics (abbreviated (1−x)BNLT−xBZT) where 0.1≤x≤0.3 were fabricated by the combustion technique using glycine as fuel. BNLT and BZT powders were calcined at temperatures of 825 °C for 4 h and 925 °C for 6 h, respectively. After that they were mixed with the different compositions. It was found that the optimum sintering temperature of (1−x)BNLT−xBZT ceramic was obtained at 1125 °C for 2 h. This ceramic had the highest density. The structure of the (1−x)BNLT−xBZT ceramics exhibited the co-existence of tetragonal and rhombohedral phases with x≤0.1. The tetragonality increases with the increase of x content. The average grain size, the density and the Curie temperatures decrease with increasing x content. The maximum dielectric constant and the highest Pr were at about 4850 and 12.7 μC/cm2, respectively, and were obtained by the 0.85BNLT−0.15BZT sample.