Evolution of structural and morphological transformations of titanium dioxide powder particles during CVD synthesis in the temperature range of 350—900 °С

Abstract

Electron microscopy studies have established that the formation of a powder TiO₂ in the range T = 350—900 °С is due to the development of the following sequence of processes: the formation of nanosized onion-like particles → sampling of such particles into spherical aggregates → homogenization of the substructure in aggregates (coalescence of onion-like particles) and formation іn them the grain structure →phases transformation of anatase → rutile which is accompanied by the expansion of aggregates and the formation of independent monocrystalline particles with elements of contact between them until the emergence of autonomous particles with elements of contact between them. According to the results of the IR studies, it was concluded that the synthesis of titanium dioxide is carried out with the participation of its hydrated forms. Full text download