Synthesis and performance of tetragonal BaTiO3 fine powders via a facile tartaric acid assisted method

A facile tartaric acid assisted method using metatitanic acid, barium hydroxide and tartaric acid as starting materials is proposed to prepare tetragonal BaTiO 3 fine powders. Owing to the ultrafine character of the as-formed BaCO 3 with high chemical activity, and its arrangement coating the surface of intermediate TiO 2 nanoscale needles, pure cubic phase BaTiO 3 homogeneous powders with size of about 50 nm was obtained via calcining treatment at 650 ℃, which subsequently transformed as tetragonal BaTiO 3 uniform powders with size of about 240 nm and high tetragonality (c/a=1.0095) after calcining treatment at 1050 ℃. The BaTiO 3 ceramic prepared from the BaTiO 3 uniform powders displayed much improvement performances with high permittivity of about 5980 and low dielectric loss of about 0.014 at room temperature in comparison to the BaTiO 3 ceramic prepared respectively from the BaTiO 3 synthesized via a traditional solid-state method, and commercial BaTiO 3 , suggesting it’s compatible in application of MLCCs with high performance.