天津科技大学学报2017，Vol.32Issue(4)：36-40,5.DOI:10.13364/j.issn.1672-6510.20160046
Na2B4O7-Mg2B6O11-H2O体系298.15K时固液相平衡研究
Solid-liquid Phase Equilibria in the Aqueous System Na2B4O7-Mg2B6O11-H2O at298.15K
摘要
Abstract
The phase equilibrium of the aqueous system Na2B4O7-Mg2B6O11-H2O has been researched at 298.15K using an iso-thermal dissolution method.The solubility and physico-chemical properties such as density and refractive index were analyzed.Based on the experimental data,the phase diagram at 298.15K and diagrams of physico-chemical properties ver-sus compositions were plotted respectively.The results show that the system at 298.15K belongs to hydrate type Ⅰ and no double salt or solid solution was generated.There is one invariant point(liquid phase composition is Na2B4O72.95%,, Mg2B6O110.034%,),two univariate curves and two crystallization fields(Na2B4O7·10H2O and Mg2B6O11·15H2O).The con-centration of Mg2B6O11 decreased with the concentration increase of Na2B4O7,which shows that Na2B4O7 has salting-out effect on Mg2B6O11.Physico-chemical properties changed regularly with the increase of Na2B4O7 content.Using empirical equations,the calculated values highly match the experimental values.关键词
稳定相平衡/溶解度/硼砂/多水硼镁石Key words
stable phase equilibrium/solubility/borax/inderite分类
化学化工引用本文复制引用
杜雪敏,王士强,景妍,郭亚飞,邓天龙..Na2B4O7-Mg2B6O11-H2O体系298.15K时固液相平衡研究[J].天津科技大学学报,2017,32(4):36-40,5.基金项目
国家自然科学基金资助项目(U1507109,U1407113,21276194,21106103) （U1507109,U1407113,21276194,21106103）
