| 硅灰石与盐酸快速反应规律及应用研究 |
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| 引用本文： | 王廷吉,周 光,陈庆春.硅灰石与盐酸快速反应规律及应用研究[J].岩石矿物学杂志,2002,21(3):291-297. |
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| 作者姓名： | 王廷吉 周 光 陈庆春 |
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| 作者单位： | 1. 华东地质学院,材料科学与工程系,江西,抚州,344000
2. 重庆市建筑科学研究院,重庆,400015 |
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| 基金项目： | 江西省自然科学基金资助项目 (975 0 15 ) |
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| 摘 要： | 反应体系pH≤1．5时，硅灰石与盐酸快速反应，反应后体系中Si,Ca,Fe,Mg等元素在固液两相中化学状态及分布不同，当pH值为0．3－0．6时，液相中SiO2(硅溶胶）比例最大，Ca主要存在于液相中，但固相中总有少量Ca存在。快速反应固相比表面积较大，若反应前添加PEG，反应后中和到pH=4，可制备高比表面多孔SiO2，其比表面积＞430m^2/g，孔径1－2nm，该产物在合成以二氧化硅为基质的纳米复合材料及用作催化剂载体等方面有较好的应用前景。
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| 关 键 词： | 硅灰石 快速反应 化学状态 pH值 纳米复合材料 固相 比表面积 |
| 文章编号： | 1000-6524(2002)03-0291-07 |
| 修稿时间： | 2001年5月8日 |
The regularity of rapid reaction between wollastonite and hydrochloric acid and its application |
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| WANG Ting_ji,ZHOU Guang and CHEN Qing_chun.The regularity of rapid reaction between wollastonite and hydrochloric acid and its application[J].Acta Petrologica Et Mineralogica,2002,21(3):291-297. |
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| Authors: | WANG Ting_ji ZHOU Guang and CHEN Qing_chun |
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| Institution: | WANG Ting_ji 1,ZHOU Guang 2 and CHEN Qing_chun 1 |
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| Abstract: | Wollastonite and hydrochloric acid react quickly when the pH value is not higher
than 1.5. This paper studies the chemical conditions and distribution of such elements as Si,Ca, Fe and Mg in solid phase and liquid phase after reaction. When the pHvalue is 0.3~0.6,the ratio of silica in liquid phase (silica sol) is the highest. Ca is mainly in liquid phase, with always a little in solid phase. The specific surface area of solid phase is large in rapid reaction.If PEG is added to the system before reaction and the PH value is adjusted to 4 after reaction,
porous silica with specific surface area larger than 430 m2/g and pore size of 1~2 nm can be prepared. The product can be used in the preparation of nano-composite based on silica and catalyst holder. |
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| Keywords: | wollastonite hydrochloric acid rapid reaction application |
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