Morphology-controlled synthesis of SrTiO₃ micro-scale particles

A novel and simple strategy of morphology-controlled SrTiO₃ (ST) micro-scale particle synthesis by the flux method is reported. Systematic experiments are designed to realize the tunable morphologies of the particles when the flux salt, sintering process, and the precursors are changed. The ST plates can be synthesized by plate-like Bi₄Ti₃O₁₂ (BIT) precursors in NaCl flux. However, the as-synthesized Bi₄Ti₃O₁₂ grains transform into reticular particles and finally into rods at higher temperature in NaCl and KCl compounds. Besides, cubic ST particles are also prepared using different precursors as a comparative experiment. This study provides a strategy for further investigations in designing the morphology-controlled particles and efficient anisotropic materials of perovskite structure such as ferroelectric and photocatalyst.