| 盐卤硼酸盐化学ⅩⅩⅥ. MgO·2B2O3－18%MgCl2－H2O产过饱和溶液结晶动力学研究 |
| CHEMISTRY OF BORATES IN SALT LAKE BRINE Ⅹ Ⅹ Ⅵ. STUDY ON CRYSTALLIZATION KINETICS OF Mg-BORATES FROM MgO·2B2O3-18%MgCl2H2O SOLUTION AT 20℃ |
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| 摘要: MgO·2B2O3-18%MgCl2-H2O过饱和溶液于20℃恒温静置,其结晶过程分为两个阶段.第一阶段结晶析出三方硼镁石(MgO·3B2O3·7.5H2O),第二阶段析出章氏硼镁石(MgO·2B2O3·9H2O).未得到多水硼镁石和库水硼镁石.探讨了两种析出团相的结晶机理并拟合出结晶动力学方程.结果表明,两种固相结晶机理均为多核表面反应控制生长. |
| 关键词: 镁 硼酸盐 结晶动力学 |
| 基金项目: 国家自然科学基金;中国科学院基础研究“八五”重点资助 |
| Abstract: The supersaturated solution containing 18% MgCl2 and 4.57% MgO·2B2O3 was prepared and kept at 20℃. The crystallization processes of Mg-boratcs from the solution have been studied with the kinetic method. Macallisteritc(MgO·3B2O3·7.5H2O)and Hungchaoite(MgO·2B2O3·9H2O)crystallized out respectively from the solution. With the aid of simplex method and digital integration as well as Runge-Kutta digital solution of differential equation system, we fitted the experimcntal data and obtained the crystallization kinetic equation. The results showed that the crystallization mechanisms arc all polynuclear layer controlled growth.The crystallization reaction processes were also discussed. |
| Keywords: magnesium borat crystallization kinetics |
| 投稿时间：1995-01-26 |
| 摘要点击次数: 1672 |
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| 姚占力,高世扬,朱黎霞.盐卤硼酸盐化学ⅩⅩⅥ. MgO·2B2O3－18%MgCl2－H2O产过饱和溶液结晶动力学研究[J].无机化学学报,1995,11(4):419-423. |
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