三元体系NaVO_3-H_2NCONH_2-H_2O 298K相平衡及平衡液相物化性质研究  

EXPERIMENTAL STUDY ON THE EQUILIBRIUM PHASE DIAGRAM AND SOLUTION PROPER TIES OF THE TERNARY SYSTEM NaVO_3-H_2NCONH_2-H_2O AT 298 K

作　　者：彭芸[1] 曾英[1] 周琳[1] 李元波[1] 

机构地区：[1]成都理工大学材料与生物工程学院,四川成都610059

出　　处：《矿物岩石》2005年第2期118-120,共3页Mineralogy and Petrology

基　　金：四川省教育厅青年科学基金(2003B027);四川省应用基础研究基金(04JY029-008-1);中国地质调查局项目(200314200015)

摘　　要：　采用等温平衡溶解平衡法测定了三元体系NaVO3-H2NCONH2-H2O298K下的溶解度及平衡液相物化性质(密度、电导率、pH值),绘制出了相应的溶解度等温图和物化性质-组成图。此三元体系等温溶解度图属简单共饱型,未产生新的复盐和固溶体。2个结晶区分别对应为盐NaVO3和H2NCONH2,无变量点平衡液相组成为:w(NaVO3)3.99%,w(H2NCONH2)40.17%,对应的平衡固相盐为NaVO3和H2NCONH2。In this paper,solubilities and properties (density,conductivity and pH value) of equilibrium solution were studied in the ternary system NaVO_3-H_2NCONH_2-H_2O at 298K by isothermal method.Phase diagram and physicochemical properties-composition diagrams of the ternary system were plotted according to the experimental data.This ternary system was a simple evtonic one without double salt or solid solution.The isotherm diagram consisted of two univariant curves and two crystallization fields corresponding to NaVO_3 and H_2NCONH_2,and the composition of equilibrium solution of invariant point was:w(NaVO_3)3.99%,w(H_2NCONH_2)(40.17%) respectively.

关 键 词：NaVO3 三元体系 等温溶解平衡法 物化性质 

分 类 号：TQ013.1[化学工程]