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《Chemical Research and Application》 2006-05
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The isothermal phase diagram and physico-chemical properties of ternavy system NaVO_3-Na_3PO_4-H_2O

ZHOU Lin,ZENG Ying,Peng Yun,LI Yuan-bo(College of Materials and Chemistry & Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China)  
The phase equilibrium and physicochemical properties(density,conductivity and pH value)of the ternary system NaVO_3—Na_3PO_4—H_2O were studied at 298 K by the isothermal dissolution method.According to the determined data,the phase diagram and composition-proerties-composition diagram were plotted.The isothermal solubility diagram of the ternary system consists of two univariant curves,one invariant point B,and two crystallization regions for salt Na_3 PO4·8H_2O and NaVO_3,respectively.No double salt or solid solution is formed.Physicochemical properties(density,conductivity and pH value)regularly change with the composition of solution.
【Fund】: 四川省教育厅青年科学基金资助项目(2003B027);; 四川省应用基础研究基金资助项目(04JY029-008-1);; 中国地质调查局项目(200314200015)资助
【CateGory Index】: O642.42
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