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用线性扫描伏-安法研究了等摩尔KCl·NaCl熔体中钕和钇离子在锑、铋、铝、镓、锡、锌、铅、钠八种液体阴极和固体钼阴极上析出电位,求出了析出电位差△ψ。产生△ψ的原因是稀土在液体阴极中的活度比在固体阴极上低,使析出电位向正移,同时也由于稀土与液体阴极合金化产生去极化作用的结果。稀土金属和液体阴极材料的电负性差越大,△ψ也越大。还研究了稀土氯化物浓度和熔体温度列稀土离子析出电位和△ψ的影响,给出了相应的关系式。
The potential of neodymium and yttrium ions in eight kinds of cathodes of antimony, bismuth, aluminum, gallium, tin, zinc, lead, sodium and solid molybdenum in equimolar KCl · NaCl melt was studied by linear sweep voltammetry. Precipitation potential difference △ ψ. The reason for the generation of Δψ is that the activity of rare earth in the cathode of the liquid is lower than that of the cathode in the solid, and the potential of the precipitate is shifted forward, and the depolarization is also caused by the alloying of the rare earth with the cathode of the liquid. The greater the difference in electronegativity between the rare earth metal and the liquid cathode material, the larger the Δψ. The effects of rare earth chloride concentration and melt temperature on the precipitation potential and △ ψ of rare earth ions were also studied, and the corresponding relations were given.