| 2MgO·2B2O3·MgCl2·14H2O-7.8%H3BO3-H2O体系多温相关系研究 |
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| 引用本文： | 刘志宏,胡满成,高世扬. 2MgO·2B2O3·MgCl2·14H2O-7.8%H3BO3-H2O体系多温相关系研究[J]. 高等学校化学学报, 2003, 24(2): 189-194 |
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| 作者姓名： | 刘志宏 胡满成 高世扬 |
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| 作者单位： | 1. 陕西师范大学化学与材料科学学院,西安,710062;兰州大学化学化工学院,兰州,730000
2. 陕西师范大学化学与材料科学学院,西安,710062 |
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| 基金项目： | 国家自然科学基金 (批准号 :2 99710 32 )资助 |
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| 摘 要： | 研究了2MgO·2B2O3·MgCl2·14H20在不同温度下的7.8%H3BO3水溶液中的相转化产物及其溶解度.IR,XRD,TG及化学分析表明,相转化产物在0～22℃范围内为MgO·2B2O3·9H20;22～68℃为MgO·2B2O3·7.5H20;68～95℃为MgO·2B2O3·7H20;95～98.8℃为MgO·2B2O3·5H20;100～110℃为MgO·B2O3·3H20;110～120℃为2MgO·B2O3·2H20;120～170℃为2MgO·B2O3·1.5H20;170～200℃为2MgO·B2O3·H20.提出了相转化反应原理.
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| 关 键 词： | 氯柱硼镁石 镁硼酸盐 相关系 |
| 文章编号： | 0251-0790(2003)02-0189-06 |
| 收稿时间： | 2002-06-05 |
| 修稿时间： | 2002-06-05 |
Phase Relation of 2MgO·2B2O3·MgCl2·14H2O-7.8%H3BO3-H2O System at Various Temperatures |
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| LIU Zhi-Hong ,,HU Man-Cheng ,GAO Shi-Yang . Phase Relation of 2MgO·2B2O3·MgCl2·14H2O-7.8%H3BO3-H2O System at Various Temperatures[J]. Chemical Research In Chinese Universities, 2003, 24(2): 189-194 |
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| Authors: | LIU Zhi-Hong HU Man-Cheng GAO Shi-Yang |
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| Affiliation: | LIU Zhi-Hong 1,2*,HU Man-Cheng 1,GAO Shi-Yang 1,2 |
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| Abstract: | The phase relation of 2MgO·2B2O3·MgCl2·14H20-7.8%H3BO3-H20 system at various temperatures has been studied by FTIR spectroscopy, XRD, TG, as well as chemical analyses. The phase transformation product is MgO·2B2O3·9H20 at 0-22 ℃, MgO·2B2O3·7.5 H20 at 22-68 ℃, MgO·2B2O3·7H20 at 68-95 ℃, MgO·2B2O3·5H20 at 95-98.8 ℃, MgO·B2O3·3H20 at 100-110 ℃, 2MgO·B2O3·2H20 at 110-120 ℃, 2MgO·B2O3·1.5H20 at 120-170 ℃, and 2MgO·B2O3·H20 at 170-200 ℃, respectively. The mechanisms of dissolution and phase transformation have been proposed and discussed. |
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| Keywords: | Chloropinnoite Mg-borates Phase relation |
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