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Synthesis of Ti4O7 magneli phase using mechanical activation

Gusev A.A. (Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of RAS, Novosibirsk, Russia)
Avvakumov E.G. (Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of RAS, Novosibirsk, Russia)
Vinokurova O.B. (Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of RAS, Novosibirsk, Russia)

The processes of phase formation by heating of a mechanically activated mixture of Ti + TiO2 in different atmospheres (air, argon, hydrogen) were investigated. The Ti4O7 compound was obtained by annealing of the mixture in hydrogen atmosphere in the interval of temperatures of 900-1200ºC, the Ti2O3 oxide formed at 800ºC in argon atmosphere and TiO2 formed in air atmosphere Conductivity and morphology of Ti4O7 samples obtained in hydrogen were studied.

Keywords: mechanical activation, titanium oxides, dispersed particles, reduction, sintering