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采用Ｘ射线衍射、红外光谱及现代摄像等技术研究了Ｋ２ＴａＦ７－Ｈ２Ｏ体系中Ｋ２ＴａＦ７的水解特征及Ｋ２ＴａＦ７在烘干过程的稳定性；考察了Ｋ２ＴａＦ７与金属钠的润湿状态；同时测定了Ｋ２ＴａＦ７－ＮａＣｌ体系中特征点的粘度及密度变化．结果表明：Ｋ２ＴａＦ７的水解是一个非常复杂的过程，Ｋ＋和Ｆ－对钽盐会产生盐析作用，从而抑制Ｋ２ＴａＦ７的水解；Ｋ２ＴａＦ７活化的目的主要是细化颗粒，获得理想晶型；Ｋ２ＴａＦ７物料与液钠的“包覆”特征是Ｋ２ＴａＦ７与稀释剂的混合物粉末在液钠表面形成包裹层，而且熔盐体系的熔度、粘度及密度等物理参数对Ｋ２ＴａＦ７钠还原过程有重要的影响．研究结果可为Ｋ２ＴａＦ７钠还原过程参数的选择提供重要的理论依据．
The hydrolysis characteristics of K2TaF7 in K2TaF7-H2O system and the stability of K2TaF7 in the drying process were investigated by X-ray diffraction, infrared spectroscopy and modern imaging. The wetting state of K2TaF7 with sodium metal was also investigated. The effects of K2TaF7-NaCl Viscosity and density changes of characteristic points in the system. The results show that the hydrolysis of K2TaF7 is a very complicated process. K + and F- can cause salting-out effect on tantalum salt, thus inhibiting the hydrolysis of K2TaF7. The purpose of K2TaF7 activation is mainly to refine the grains to obtain the ideal crystal form. K2TaF7 material and The “coating” feature of liquid sodium is that the mixture powder of K2TaF7 and diluent forms a coating on the surface of liquid sodium, and the physical parameters such as melting degree, viscosity and density of the molten salt system have an important influence on the reduction process of sodium K2TaF7. The results provide important theoretical basis for the selection of K2TaF7 sodium reduction process parameters.