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...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)→Sb 4O 5Cl 2(s)+SbCl 3(g)→Sb 8O 11 Cl 2 (s)+SbCl 3(g)→Sb 2O 3(s)+SbCl 3(g). The forth step is the oxidation of Sb 2O 3 by air, Sb 2O 3(s)+O 2→Sb 2O 4(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 the order are respectively 91.97?kJ/mol, 0.73 in the first step, 131.14?kJ/mol, 0.63 in the second step and 146.94?kJ/mol, 1.58 in the third step.展开更多
文摘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)→Sb 4O 5Cl 2(s)+SbCl 3(g)→Sb 8O 11 Cl 2 (s)+SbCl 3(g)→Sb 2O 3(s)+SbCl 3(g). The forth step is the oxidation of Sb 2O 3 by air, Sb 2O 3(s)+O 2→Sb 2O 4(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 the order are respectively 91.97?kJ/mol, 0.73 in the first step, 131.14?kJ/mol, 0.63 in the second step and 146.94?kJ/mol, 1.58 in the third step.
