【摘要】 本文应用TG-DSC-MS联用技术和XRD研究Ar气条件下偏钒酸铵热分解过程和动力学。热分解过程包括4个反应,气相产物是NH3和H2O,最终固相产物是V2O5。生成V2O5反应受形核长大控速,动力学方程为-ln(1-α)=kt,表观活化能和表观速率常数分别为460kJ/mol和0.0344s-1。更多还原

【Abstract】 The mechanism and process of thermal decomposition of NH4VO3 in Ar were investigated by TG-DSC-MS and XRD at 25-450℃.The process includes four reactions and evolves NH3 and H2O.The X-ray pattern of final product matches with that of V2O5 in ASTM.The reaction of forming V2O5 is controlled by nucleation and nuclei growth with a kinetic equation-ln(1-α)=kt,and apparent activation energy of 460kJ/mol and apparent rate constant of 0.0344s-1 ate obtained.更多还原