【摘要】 应用TG/DSC-FTIR-MS联用技术研究了标准物质CaC₂O₄·H₂O的分解过程及分解机理，用热分析动力学数据处理的Ozawa和Coats-Redfern方法，从微观气体产物的生成动力学角度对CaC₂O₄·H₂O的分解机制进行了研究，获得了CO气体产物的生成动力学参数和热分解三阶段的活化能和机理函数。验证了CaC₂O₄·H₂O的经典的分解生成气体产物为H₂O,CO和CO₂的分解机制的正确性。更多还原

【Abstract】 The thermal decomposition and mechanism of CaC₂O₄·H₂O were investigated by using DSC/TG-MS-FTIR technology together.With the thermal decomposition of CaC₂O₄·H₂O、H₂O,CO and CO₂ are detected in gas phase by simultaneous TG-DSC-FTIR-MS techniques.The curves of TIR and TMS for correlation of conversion with respect to temperature were obtained, which were based on the changes of relative IR and MS intensity of characteristic gas products corresponding temperature.The kinetics parameters of gas product formations identified from IR and MS were obtained by Ozawa and Coats-Redfern equations.These parameters would be demonstrated the decomposition mechanism which would rather closely to the microcosmic processes.The results show that the new method following by TG-DSC-FTIR-MS technologies and kinetics is an important way to investigate the thermal decomposition and mechanism of compounds.更多还原