摘要
The phase diagrams of the binary systems RECl<sub>3</sub>-MCl<sub>n</sub>（M=Li,Mg,Ca,Pb;n=1 or 2）were investigated bymeans of DTA and X-ray diffraction analysis.It was found that they are of simple eutectic type with eutectic points50.1 Mol.-% TBCl<sub>3</sub>（445℃）,67.5Mol.-% TbCl<sub>3</sub>（589℃）,65.9Mol.-% TbCl<sub>563℃</sub>and 35.6 Mol.-%TbCl<sub>3</sub>（445℃）respectively.Unstable compounds,formed in the solid slate,are MgTbCl<sub>7</sub>,CaTb<sub>2</sub>Cl<sub>8</sub>,LiTb<sub>2</sub>Cl<sub>7</sub> andPbTbCl<sub>5</sub>.Their decomposition temperatures are 388℃ with a phase transition at 352,500 and 521℃ with a phasetransition at 483 and 405℃ respectively.Some rules of the phase diagrams were explored.
The phase diagrams of the binary systems RECl_3-MCl_n(M=Li,Mg,Ca,Pb;n=1 or 2)were investigated by means of DTA and X-ray diffraction analysis.It was found that they are of simple eutectic type with eutectic points 50.1 Mol.-% TBCl_3(445℃),67.5Mol.-% TbCl_3(589℃),65.9Mol.-% TbCl_(563℃)and 35.6 Mol.-% TbCl_3(445℃)respectively.Unstable compounds,formed in the solid slate,are MgTbCl_7,CaTb_2Cl_8,LiTb_2Cl_7 and PbTbCl_5.Their decomposition temperatures are 388℃ with a phase transition at 352,500 and 521℃ with a phase transition at 483 and 405℃ respectively.Some rules of the phase diagrams were explored.
出处
《中国有色金属学会会刊：英文版》
CSCD
1993年第2期32-35,共4页
Transactions of Nonferrous Metals Society of China
基金
Project financially supported by the National Natural Science Foundation of China
Manuseript received,Sept.21,1992
