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The crystalline phase transition from tetragonal TiO2 anatase and rutile structures to an orthorhombic unit cell of CaTiO3 was achieved using a microwave-assisted hydrothermal process. FESEM and HRTEM Images show a well faceted CaTiO3 rectangular-prism morphology. The use of a urea solution during the hydrothermal process allows the direct transformation of TiO2 to perovskite-like with exposed (111) and (202) facets.
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Lozano et al. (2013) studied this question.
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