Reduction of TiO2 with hydrogen cold plasma in DC pulsed glow discharge
(Shanghai Key Laboratory of Modern Metallurgy and Material Processing,
Shanghai University, Shanghai 200072, China)
Shanghai University, Shanghai 200072, China)
Abstract: The reduction of TiO2 to Ti2O3 with hydrogen cold plasma generated by a DC pulsed glow discharge was realized under 2500Pa at 1233K. Only a little of Ti10O19 and Ti9O17 was detected for using molecular hydrogen. Enhancement effects of hydrogen cold plasma on the reduction were discussed in terms of thermodynamic coupling, kinetics and plasma sheath. The exited hydrogen species are considered more effective reducing agents. It is instructive to reduce refractory oxides with plasma hydrogen at the reduced temperature.
Key words: hydrogen; cold plasma; reduction; TiO2; pulsed glow discharge