Abstract
The structure of barium titanate powder prepared by conventional solid state reaction has been investigated by x-ray diffractometry. The pseudo-Voigt function fitted to the diffractographs to discriminate between cubic and tetragonal peaks. The Scherrer formula, with correction for instrument broadening, was employed to estimate the particle size. The method of internal standards was applied to calibrate the amount of cubic phase in the particles. The fraction of cubic shell, covering tetragonal core, was found to increase with decreasing particle size.
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