Synthesis and characterization of (001) oriented BaTiO3 platelets through a topochemical conversion

Micrometer-sized (001) oriented BaTiO3 (BT) platelets with a perovskite structure, a stoichiometric composition and a high aspect ratio (10–20 μm in diameter and 0.5–1 μm in thickness) were synthesized through a modified two-step molten salt method by means of a typical topochemical microcrystal conversion. The results indicated that it is necessary to prevent Bi+ and Cl− or NO3− from coexisting under nonacidic or weakly acid environment. A less pollutive washing method and the corresponding principle were summarized in combination with the hydrolysis reaction process. The effect of synthesis temperatures on the formation of BT platelets was discussed.