Abstract
Barium titanate (BaTiO3) was produced from an barium-titanate-peroxo-hydroxide precursor material in NaCl-KCl and Na2SO4-K2SO4 salt mixtures or fluxes at temperatures up to 1080°C via the molten-salt synthesis (MSS) method. Beside the different salt mixtures several other parameters were studied to determine the effect on the particle morphology. A relatively fast heating rate and a relatively high salt to precursor ratio resulted in a highly faceted morphology. The effect of the salt flux was clearly seen in the morphology of BaTiO3 obtained by MSS at 1080°C. Cube-shaped particles were observed for the chloride-flux-grown BaTiO3 while hexagonal-shaped flat particles were observed for the sulfate-flux-grown BaTiO3. BaTiO3 particles produced in the chloride-flux were either {101} or {001} faceted. The hexagonal surface of the sulfate-flux-grown BaTiO3 was {111} faceted.
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