Thermal decomposition kinetics of antimony oxychloride in air

来源期刊：中国有色金属学报(英文版)2002年第1期

论文作者：阳卫军 唐谟堂 金胜明

文章页码：156 - 159

Key words：antimony oxychloride；thermal decomposition；kinetics

Abstract: The DTA and XRD techniques were employed to study thermal decomposition mechanism of antimony oxychloride SbOCl in the air. The thermal decomposition reaction occurs in four steps, and the former three steps as: SbOCl(s)→Sb₄O₅Cl₂(s)+SbCl₃(g)→Sb₈O₁₁Cl₂(s)+SbCl₃(g)→Sb₂O₃(s)+SbCl₃(g). The forth step is the oxidation of Sb₂O₃ by air, Sb₂O₃(s)+O₂→Sb₂O₄(s). The activation energy and the order of the thermal decomposition reaction of antimony oxychloride in three steps presented in DTA curves were calculated according to Kinssinger methods from DTA curves. The values of activation energy and t he order are respectively 91.97kJ/mol, 0.73 in the first step, 131.14kJ/mol, 0.63 in the second step and 146.94kJ/mol, 1.58 in the third step.