The mechanism and influence factors of thermal decomposition of NH_4VO_3 in Ar to produce V_6O_(13) were investigated by TG-DTG, DSC, X-ray diffraction and orthogonal design experiments at 25～450℃.The process includ...The mechanism and influence factors of thermal decomposition of NH_4VO_3 in Ar to produce V_6O_(13) were investigated by TG-DTG, DSC, X-ray diffraction and orthogonal design experiments at 25～450℃.The process includes four reactions, among which the reduction of V_2O_5 by NH_3 is one of the most important stagrt controlling the constituents of the fina1 products, and it is affected by heating rate and amount of NH_4VO_3 singnificantly. This reduction reaction is controlled by a first order reaction or nucleation and nuclei growth with a kinetic equation--ln(l-a)=kt,and apparent activation energy of 410kJ/molis obtained.展开更多
文摘The mechanism and influence factors of thermal decomposition of NH_4VO_3 in Ar to produce V_6O_(13) were investigated by TG-DTG, DSC, X-ray diffraction and orthogonal design experiments at 25～450℃.The process includes four reactions, among which the reduction of V_2O_5 by NH_3 is one of the most important stagrt controlling the constituents of the fina1 products, and it is affected by heating rate and amount of NH_4VO_3 singnificantly. This reduction reaction is controlled by a first order reaction or nucleation and nuclei growth with a kinetic equation--ln(l-a)=kt,and apparent activation energy of 410kJ/molis obtained.
