A comparative study of different solvothermal methods for the synthesis of Sn2+-doped BaTiO3 powders and their dielectric properties

摘要

Ternary oxDEes containing Sn2+ are rare and difficult to prepare by the conventional solDE state reactions due to the disproportionation of Sn2+ to Sn4+ and Sn at high temperatures. In this article, Sn2+-doped barium titanate, Ba1-x Sn (x) TiO3 (x = 0.00, 0.02, 0.05, and 0.10) nanopowders were successfully synthesized at a moderate temperature by a microwave-assisted solvothermal reaction (MSR) and a solvothermal reaction with rolling (SRR). The powders obtained using the MSR and SRR consisted of nanoparticles of 20-50 nm and 100-120 nm in diameter, respectively. The dielectric constant of the sample increased by doping with a small amount of Sn2+ (x a parts per thousand currency sign 0.05), but decreased by doping in excess amounts of it.