本文系统研究了冰晶石熔体中添加钇族稀土碳酸盐即2.7NaF·AlF_3(7Wt％CaF_2)-Al_2O_3-YM_2O_3体系的一系列物理化学性质。 应用最优化设计原理,研究了该体系的初晶温度、表面张力、密度、粘度和电导率,分别得到了表征该体系初晶温度、粘度与Al_2O_3、YM_2O_3浓度关系的回归方程以及该体系表 In this paper, a series of physico-chemical properties of 2.7NaF · AlF_3 (7Wt% CaF_2) -Al_2O_3-YM_2O_3 system for the addition of yttrium-bearing rare earth carbonate into cryolite melt have been systematically studied. The optimal temperature, surface tension, density, viscosity and conductivity of the system were studied by using the principle of optimum design. The regression equations for the relationship between the temperature and viscosity of the system and the concentrations of Al 2 O 3 and YM 2 O 3 were obtained,