2005•Cailiao yanjiu xuebaoRequires access

Decomposition kinetics and its influencing factors SrCO_3 of with high purity

Wei Qunyi

Abstract

Non-isothermal decomposition of SrCO3 was investigated by DSC-TG, and kinetic parameters of decomposition were calculated and analyzed by Kissinger method. The influences of additives (including Al2O3, SiO2, C) on decomposition process of SrCO3 were investigated, respectively. In the case of pure SrCO3, the transformation from rhombohedral to hexagonal occurred at 930-950℃; decomposition reaction of it occurred at about 900℃ cand finished at above 1150℃. The non-isothermal decomposition process of SrCO3 mainly occurred in second endothermic peaks. Additives can change reactive mode of SrCO3, and decrease its decomposition temperature about 100℃. In these additives, additive C is the best.

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Key concepts: Decomposition, Endothermic process, Chemical process of decomposition, Isothermal process, Materials science, Kinetics, Chemical decomposition, Chemical engineering