四电极法测量Na_3AlF_6-Al_2O_3-RE_2O_3熔体的电导率  

MEASUREMENT OF SPECIFIC ELECTRICAL CONDUCTIVITY OF Na_3AlF_6-Al_2O_3-RE_2O_3 MELT BY FOUR ELECTRODE METHOD

作　　者：赵敏寿[1] 冯力[1] 吕翔平[1] 唐定骧[1] 

机构地区：[1]中国科学院长春应用化学研究所

出　　处：《应用化学》1989年第5期67-69,共3页Chinese Journal of Applied Chemistry

摘　　要：为了排除和减小电极与熔体接触面间的阻抗,电极与连接导线的电阻以及石英电导池腐蚀的影响,本文用交流四电极法测量了熔体Na_3Na_3AlF_6-Al_3O_3-RE_2O_3的电导率,其中RE指以Ce为主的混合稀土。 实验装置如图1所示,电极为φ0.8mm的Pt和Pt-Rh丝(其中二根Pt、二根Pt-Rh)。Four electrode method has beenused in measuring the specific electrical conductivityk of Na_3AlF_6 -Al_2O_3-RE_2O_3 melt. It is found.that k is decreased with increasing thecontents of Al_2,O_3 and RE_2O_3 in the melt and is increased with temperature. The apparentactiviation energy calculated is 18.84kJ/mol.The effect of the Al_2O_3 content on k is greaterthan that of the RE_2O_3 content.A mathematical model of the specific electrical conductivityof the melt is deduced with an accuracy of 95%.

关 键 词：氟铝酸钠 氧化铝 烯土氧化物 溶体 

分 类 号：TF821[冶金工程—有色金属冶金]