物理化学学报 >> 2007, Vol. 23 >> Issue (08): 1285-1287.doi: 10.3866/PKU.WHXB20070828

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K2B4O7-Na2B4O7-Li2B4O7-H2O四元体系273 K介稳相平衡

桑世华; 殷辉安; 倪师军; 张成江   

  1. 成都理工大学材料与化学化工学院, 成都 610059; 成都理工大学地球化学系, 成都 610059
  • 收稿日期:2007-02-26 修回日期:2007-04-27 发布日期:2007-08-03
  • 通讯作者: 桑世华 E-mail:sangsh@cdut.edu.cn, sangshihua@sina.com.cn

Metastable Equilibrium Solubilities of Solutions in the Quaternary System of K2B4O7-Na2B4O7-Li2B4O7-H2O at 273 K

SANG Shi-Hua; YIN Hui-An; NI Shi-Jun; ZHANG Cheng-Jiang   

  1. Institute of Materials and Chemistry & Chemical Engineering, Chengdu 610059, P. R. China; Department of Geochemistry, Chengdu University of Technology, Chengdu 610059, P. R. China
  • Received:2007-02-26 Revised:2007-04-27 Published:2007-08-03
  • Contact: SANG Shi-Hua E-mail:sangsh@cdut.edu.cn, sangshihua@sina.com.cn

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摘要： 采用等温蒸发平衡法研究了四元体系K2B4O7-Na2B4O7-Li2B4O7-H2O在273 K时的介稳相平衡及平衡液相的密度. 研究发现该四元体系为简单共饱和型, 无复盐及固溶体形成, 根据溶解度数据绘制了相图, 相图中有一个共饱点E, 三条单变度曲线E3E, E2E, E1E; 三个平衡固相分别为K2B4O7·4H2O、Na2B4O7·10H2O 和LiBO2·8H2O. 并简要讨论了实验结果.

关键词: 水盐体系, 介稳相平衡, 硼酸盐

Abstract: Metastable equilibrium solubilities and densities of the quaternary system of K2B4O7-Na2B4O7-Li2B4O7-H2O at 273 K were studied by isothermal evaporation method. Based on the solubility data, the metastable equilibrium phase diagramof the systemwas plotted, which consists of one invariant point E; three univariant curves E1E, E2E, and E3E, three crystallization fields Na2B4O7·10H2O , K2B4O7·4H2O, and LiBO2·8H2O. Potassium borate (K2B4O7) had the largest solubility in the system.

Key words: Salt-water system, Metastable phase equilibrium, Borate