Chlorination behaviours of tungsten oxide (WO₃) were investigated by means of a thermogravimetric analysis. The rate of chlorination was increased with increasing the mixed ratio of carbon as a reducing agent. the flow. rate of chlorine gas, reactio...
Chlorination behaviours of tungsten oxide (WO₃) were investigated by means of a thermogravimetric analysis. The rate of chlorination was increased with increasing the mixed ratio of carbon as a reducing agent. the flow. rate of chlorine gas, reaction temperature, and the amount of calcium fluoride as an additive. It was found that experimental results fit well Valensi equation, 1-2/3R-(1-R)^(2/3) = Kt and the rate of chlorination is controlled by a diffusion process, the activation energy of which is 26.0 KJ/mole. Discussion of the chlorination mechanism is also given in the text.