| MgO-B2O3-28%MgCl2-H2O体系0℃热力学非平衡态相图 |
| Phase Diagram of Thermodynamic Non-equilibrium State of MgO-B2O3-28%MgCl2-H2O System at 0℃ |
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| 摘要: 采用结晶动力学方法对MgO-B2O3-28%MgCl2-H2O体系0℃时过饱和溶液的结晶过程进行了研究，结晶析出固相通过化学分析确定了组成，并用X-射线粉末衍射和红外光谱等对其进行了表征。给出了该体系0℃时的热力学非平衡态相图。该相图有4个相区，分别与H3BO3、MgO·3B2O3·7.5H2O、2MgO·2B2O3·MgCl2·14H2O和3Mg(OH)2·MgCl2·8H2O相对应。 |
| 关键词: 结晶动力学 热力学非平衡态 相图 硼酸盐 |
| 基金项目: |
| Abstract: The crystallization processes of hydrated magnesium borates， boric and Mg-oxychloride from MgO-B2O3-28%MgCl2-H2O supersaturated solution at 0℃ have been studied by kinetic method. The crystallization solid phases were characterized by X-ray powder diffraction， IR spectra and chemical analysis. The liquid-solid phase diagram of thermodynamic non-equilibrium state of MgO-B2O3-28%MgCl2-H2O system at 0℃ has been given. In this phase diagram， there exist four crystallization fields， boric acid(H3BO3)， Macallisterite(MgO·3B2O3·7.5H2O)， chloropinnoite(2MgO·2B2O3·MgCl2·14H2O) and magnesium oxychloride (3Mg(OH)2·MgCl2·8H2O). |
| Keywords: crystallization kinetic thermodynamic non-equilibrium phase diagram Mg-borate |
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| 朱黎霞,高世扬,李新,王波,夏树屏.MgO-B2O3-28%MgCl2-H2O体系0℃热力学非平衡态相图[J].无机化学学报,2003,19(5):491-496. |
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