Thermoanalytical characteristic of nanocrystalline brookite-based titanium dioxide

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Abstract

Using differential-thermoanalytical (TG-DTA) measurement and X-ray diffraction (XRD) analysis, the characteristics of nanocrystalline brookite-based TiO2 with a certain amount of anatase and rutile have been studied. There are two irreversible endothermic peaks on the DTA curve. The first peak (with weight loss on thermal-gravity TG and differential thermalgravity DTG curves) corresponds to the desorption of physical or chemical species, while the second one (without weight loss on TG and DTG curves) is related to the structural phase transition from brookite to anatase then to rutile, and the structural phase transitions are beneficial to the grain growth. In this paper, the grain size and the content of each individual phase in specimens at different temperatures are also reported.

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