SOLID-PHASE PROCESSES AT THE TECHNOLOGY OBTAINING FUNCTIONAL MATERIALS
It was shown that there is not only the particle size reduction, but their structural and morphological transformations during mechanical activation of powders of titanium compounds, thereby increasing the reactivity of the crystallites formed at the same time. Thus, during mechanical activation of a mixture of titanium sulphate TiO(SO4)·H2O and ammonium sulfate carried out in a planetary mill, a complex compound is formed, which structure corresponds to the formula (NH4)2TiO(SO4)2·H2O. Regimes for solid-phase synthesis under a stoichiometric components ratio have been determined. By the example of mechanical activation of the metastable phase of titanium dioxide (anatase) was shown the possibility of reconstruction of its structure to form an intermediate phase, close to brookite structure, which is formed in the thermolysis rutile. The change in the crystallite size on the basis of X-ray diffraction data were calculated it was served as the basis for the study of the kinetics and mechanisms of processes occurring during mechanical activation. For substantiate the positive influence of mechanical activation on the reactivity of the solid particles have been calculated microdistortions change using the approximation method based on the use of a pseudo-Voigt function. Environmentally safe processing methods based on solid-phase processes may be used to improve the known techniques.