Polycrystalline, Al‐doped samples in the TiO 2 ‐SnO 2 ceramic system were made and annealed in the two‐phase field above the [001] coherent spinodal. The samples were examined, after various annealing times, using X‐ray diffraction and Raman spectroscopy. It was observed that time constants obtained from X‐ray studies were in good agreement with those obtained from Raman shifts, and both showed similar effects of grain size on the decomposition kinetics. These results suggest that Raman spectroscopy may be a useful technique for the study of phase transformations in ceramics.
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Cohen et al. (1988) studied this question.
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