Al_2(WO_4)_3相关体系相图及其熔剂挥发动力学

PHASE DIAGRAM OF CORRELATED SYSTEMS OF Al_2(WO_4)_3 AND KINETICS OF FLUX VOLATILIZATION

测定了Al_2(WO_4)_3-SrWO_4和Al_2(WO_4)_3-BaWO_4赝二元系相图。Al_2(WO_4)_3与SrWO_4形成共晶体系,共晶温度为103B±3℃,共晶点组成为50％(摩尔含量,以下同)SrWO_4。Al_2(WO_4)_3与BaWO_4也形成了共晶体系,共晶温度为894±3℃,共晶点组成约为42％BaWO_4。用热重法研究了两个体系的熔剂挥发动力学。

Pseudo phase diagrams of Al_2(WO_4)_3-SrWO_3 and Al_2(WO_4)_3-BaWO_4 are determined by means of DTA and XRD. Al_2(WO_4)_3 and SrWO_4 form an eutectic system, and the eutectic reaction occurs at 1038±3℃ and 50％ SrWO_4 (in mole content). The system of Al_2(WO_1)_3 and BaWO_4 is also an eutectic system with eutectic temperature of 894±3℃ and euteetic composition of 42％ BaWO_4 (in mole content). The kinetics of flux volatilization of these two systems is also studied.