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基于过程模拟开发组件库SimuSage开发了通过氢气还原氩气气氛中的NbCl5制备超细铌粉的热力学模拟程序,讨论了蒸发温度、载气用量(Ar(g))、还原反应温度、H2(g)用量、收集区温度等关键参数的影响.研究表明:NbCl5(s)的蒸发率以及气相中NbCl5(g)的浓度取决于蒸发温度及氩气的用量;还原温度为1000℃时固相产物为Nb(s)单一相所需的最小H2(g)用量为20 mol/1 mol NbCl5;提高收集区温度有利于获得高纯度固相Nb粉产物.
SimuSage, a component library based on process simulation, developed a thermodynamic simulation program for the preparation of ultrafine niobium powder by reducing NbCl5 in argon atmosphere. The effects of evaporation temperature, amount of carrier gas (Ar (g)), reduction reaction temperature, H2 ), The temperature of the collection zone and other key parameters.The results show that the evaporation rate of NbCl5 (s) and the concentration of NbCl5 (g) in the gas phase depend on the evaporation temperature and the amount of argon. When the reduction temperature is 1000 ℃, the solid phase product The minimum amount of H2 (g) required for a single phase of Nb (s) is 20 mol / 1 mol NbCl5. Increasing the temperature of the collection zone is advantageous for obtaining high purity solid Nb powder.