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 BaTiO3 fine powders. Owing to the ultrafine character of the asformed BaCO3 with high chemical activity, and its arrangement coating the surface of intermediate TiO2 nanoscale needles, pure cubic phase BaTiO3 homogeneous powders with size of about 50 nm was obtained via calcining treatment at 650 & DEG;C, which subsequently transformed as tetragonal BaTiO3 uniform powders with size of about 240 nm and high tetragonality (c/a=1.0095) after calcining treatment at 1050 & DEG;C. The BaTiO3 ceramic prepared from the BaTiO3 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 BaTiO3 ceramic prepared respectively from the BaTiO3 synthesized via a traditional solid-state method, and commercial BaTiO3, suggesting it's compatible in application of MLCCs with high performance.

Automated summary

A facile method using tartaric acid to prepare tetragonal BaTiO3 fine powders is proposed. The as-formed BaCO3 with high chemical activity coated the surface of TiO2 nanoscale needles, resulting in the formation of pure cubic phase BaTiO3 powders after calcining. The BaTiO3 ceramic prepared from these powders showed improved performances compared to ceramic prepared from traditional methods, making it suitable for high-performance MLCC applications.