摘要
根据区熔提纯稀土的理论模型,推导出了区熔提纯稀土金属棒的温度分布规律,分析了温度分布对熔体结晶速度,杂质迁移率的影响,结果表明,熔区附近温度分布呈二次曲线,与电流强度的平方成正比,与稀土棒半径成反比,并和激磁线圈与稀土棒半径之比密切相关,此结果可作为合理选取区熔提纯实验技术参数的依据。
According to the theoretical model of zone refining of rare earth,temperature distribution of the rare earth rod was deduced and the effect of temperature distribution on the crystallizing velocity of the molten sample and the moving ratio of the impurity was analyzed. The result shows that the temperature distribution nearby the melting zone presents as quadratic curve,is directly proportional to the square of the current and inversely proportional to sample radius,and is related to the ratio of the stimulated magnetic coil radius to the sample radius. The result can be applied to guide the reasonable selection of the technological parameters in the zone refining experiment.
作者
云月厚
YUN Yue-hou(School of Physical Science and Technology,Inner Mongolia University,Hohhot 010021,China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2018年第4期50-54,共5页
Chinese Rare Earths
基金
内蒙古自治区自然科学基金项目(2015MS0524)
关键词
区熔提纯
稀土棒
温度分布
zone refining
rare earth bar
temperature distribution
