【摘要】 本文对RE-Al合金体系相图的富铝部分以及混合轻稀土氯化物与等摩尔氯化钾、氯化钠所组成的熔盐混合物的物化性质与电化学性质进行了研究。更多还原

【Abstract】 Measurements have been made on the phase diagram of RE-Al alloy in Alrich region （RE=mixed lighter rare earth metals）, the weight losses, conductivities and density of RECl₃-KCl·NaCl （KCl: NaCl=1:1 mol） molten salt mixtures, and the deposition potentials of REⁿ⁺ ions in RECl₃-KCl·NaCl molten systems. The phase diagram of RE-Al alloy shows that there is an eutectic point at RE 10 wt% at 638℃, and that when the content of RE is less than 12.5 wt%, the fre zing points of alloys are lower than 690℃. The freezing points of RECl-KCl·NaCl system arc 630-650℃ in the composition range of RECl₃ 10-30 wt.% The freezing points of Al or RE-Al alloy match ones of RECl-KCl·NaCl system finely. The weight losses of RECl₃-KCl·NaCl system is doubled with increase of temperature from 750-850℃. The deposition potential of REⁿ⁺ at liquid Al cathode is more positive than one at a solid Mo cathode, therefore, its apparent current efficiency is higher. RE-Al alloys can be prepared by electrolysis at about 700℃, using RECl₃-KCl·NaCl molten salt as electrolyte and liquid Al as a cathode.更多还原