BeSO_(4)-Al_(2)(SO_(4))_(3)-Na_(2)SO_(4)三元熔盐体系相图的研究

A STUDY ON THE PHASE DIAGRAM OF TERNARY SALT SYSTEM BeSO_(4)-Al_(2)(S0_(4))_(3)-Na_(2)SO_(4)

热分析法研究了BeSO_(4)-Al_(2)(SO_(4))_(3)~Na_(2)SO_(4)三元熔盐体系的状态图。体系中存在三元转熔(包晶)点P,温度490℃,组成为BeSO_(4)18.8Wt%,Al_(2)(SO_(4))_(3)15.0%,Na_(2)SO_(4)66.2%;三元低共熔(共晶)点E1,温度为476℃,组成为BeSO_(4)20.0%,Al_(2)(SO_(4))_(3)11.2,%,Na_(2)SO_(4)68.8%。另一低共熔点E2温度为595℃,组成未能确定。体系中无三元化合物生成。

A study has been made of ternary salt system BeSO_(4)-Al_(2)(SO_(4))_(3)-Na_(2)SO_(4) by the thermal analysis method.A ternary peritectic point containing BeSO_(4)18.8 Wt%,A12(SO_(4))_(3)15.0%,Na_(2)SO_(4)66.2%,melting at 490°C and a ternary eutectic point containing BeSO_(4)20.0%,Al_(2)(SO_(4))_(3)11.2%,Na_(2)SO_(4)68.8%,melting at 475°C,were found in this system.The composition of the other ternary eutectic point melting at 595°C has not been exactly determined.No evidence was found about any ternary compound existing in the system.