The effects of sintering temperature and content of x on phase formation, microstructure and dielectric properties of (1-x)(Bi0.4871Na0.4871La0.0172TiO3)-x(BaZr(0.05)Ti(0.9)5O(3)) ceramics prepared via the combustion technique

作者：Kornphom Chittakorn; Laowanidwatana Artid; Bongkarn Theerachai^*

来源：Ceramics International, 2013, 39: S421-S426.

DOI：10.1016/j.ceramint.2012.10.106

• Sintering
• Ferroelectric properties
• Dielectric properties
• Perovskites

(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 degrees C for 4 h and 925 degrees 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 degrees 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 P-r were at about 4850 and 12.7 mu C/cm(2), respectively, and were obtained by the 0.85BNLT - 0.15BZT sample.

• 出版日期2013