Synthesis of plate-like B-site complex perovskite Ba(Zr0.1Ti0.9)O3 microcrystals

B-site complex perovskite Ba(Zr 0.1 Ti 0.9 )O 3 microcrystals at micron size with a plate-like shape was successfully synthesized using topochemical microcrystal conversion and molten salt method. A plate-like Bi 4 (Zr 0.1 Ti 0.9 ) 3 O 12 precursor was first synthesized by Zr 4+ substitution of Ti 4+ using molten salt. Then plate-like 4–9 μm Ba(Zr 0.1 Ti 0.9 )O 3 microcrystals with an average thickness <500 nm were synthesized by mixing BaCO 3 , Bi 4 (Zr 0.1 Ti 0.9 ) 3 O 12 , and KCl molten salt at 800 °C. Finally, the topochemical microcrystal conversion reaction between BaCO 3 and Bi 4 (Zr 0.1 Ti 0.9 ) 3 O 12 precursor was carried out. The results pave the way for fabricating plate-like B-site complex perovskite microcrystals.