PHASE DIAGRAM OF SYSTEM NdCl_3-LiCl-KCl

Abstract

Abstract: The phase diagram of system NdCl_3-LiCl-KCl has been investigated by DTA.Six surfaces corresponding to the prhnary crystallization of NdCl_3,LiCl,KCl,γ-KCl·NdCl_3, β-3KCl·NdCl_3 and 2KCl·NdCl_3 respectively,eleven univariant lines related to the sec- ondary crystallization,two ternary eutectics E_1(70.5wt-% NdCl_3+8.0wt-% KCl,360℃) and E,(5.0wt-% NdCl_3+ 53.0wt-% KCl,355℃)and one ternary peritectic P (67.0wt-% NdCl_3+10.0wt-% KCl,375℃)were found.It is also chtrified that this study on the system NdCl_3- KCl differs from previous work in the two transition temperatures: e_1(77.0 wt-% NdCl_3,484℃),e_2(40.0wt-% NdCl_3,620℃),p (70.0wt-%NdCl_3,610℃),3KCl·NdCl_3(690℃)and two reactions: α-3KGl·NdCl_3β-3KGl·NdCl_3 (355℃) β-SKGl·NdCl_3γ-3KCl·NdCl_3 (450℃) The eutectic point e_5(31.0wt-%LiCl,460C)is determined for the pseudobinary system 3KCl·NdCl_3—LiCl.

Key words: ternary system NdCl_3—LiCl—KCl, phase diagram

ZHANG Yifeng Northeast University of Technology,Shenyang,ChinaZHENG Chaogui YE Yupu Peking University,Beijing,China Department of Chemistry,Northeast University of Technology,Shenyang.China. PHASE DIAGRAM OF SYSTEM NdCl_3-LiCl-KCl[J]. Acta Metallurgica Sinica (English Letters), 1989, 2(7): 13-17.

References

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