Abstract
Small mica (muscovite and phologopite) flakes coated by thin TiO 2 films (40–150 nm) were studied by TG, DTG and DTA methods. The films were prepared by precipitation from two different titanium chemicals, viz. TiCl 4 and TiOSO 4. During heating both the precipitated TiO 2 hydrate films and the micas dehydrated. By thermoanalytical measurements the amount of TiO 2 on the mica and the water content of the precipitate could be determined. The TG curves could also be used for identification of the titanium source chemical, precipitation process and the mica substrate used.
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