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A novel method for synthesizing anisotropically shaped particles of materials having cubic symmetry is reported. Anisotropically shaped single-crystal particles of cubic SrTiO3 were obtained by epitaxial growth on tabular tetragonal Sr3Ti2O7. Transmission electron microscopy revealed that both the shape and the size of the single-crystal particles was regulated by selecting a precursor material that can act as a reaction site in molten KCl and has an epitaxial relation with SrTiO3. The [001] and [110] directions of tabular SrTiO3 are parallel to the [001] and [110] directions of the Sr3Ti2O7 host particle, respectively. Tabular SrTiO3 particles with rectangular faces having an edge length of 10–20 μm and a thickness of ˜2 μm were obtained by reacting TiO2 and tabular Sr3Ti2O7 particles of the same edge length in molten KCl.

Growth of Sr 2 Nb 2 O 7 particle size in KCl melts occurs by reaction on insoluble Nb 2 O 5 particles in the melt. Thus, Sr 2 Nb 2 O 7 size is controlled by the initial size of the reactants. By altering the reactant composition to include larger Nb-rich reactants such as SrNb 2 O 6 , 5-30 µm, anisotropic Sr 2 Nb 2 O 7 particles are formed.

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