| 纺锤形铁黄α－FeOOH微晶合成动力学研究 |
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| 引用本文： | 陈学元,曾桓兴,万召奎,罗红梅.纺锤形铁黄α－FeOOH微晶合成动力学研究[J].中国科学技术大学学报,1994(2). |
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| 作者姓名： | 陈学元 曾桓兴 万召奎 罗红梅 |
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| 摘 要： | 本文对纺锤形α－ＦｅＯＯＨ微晶合成动力学过程进行了研究．利用复相反应经验动力学方程，考察了初始浓度、反应温度和空气流量对Ｆｅ（ＯＨ）２－ＰｅＣＯ３悬浮液氧化速率的影响，确定了α－ＦｅＯＯＨ成核－生长速率方程，证实了晶粒生长阶段存在溶解－氧化的动态平衡，根据活化能大小，推断相界面氧化反应为该复相反应的控制步骤，还对α－ＦｅＯＯＨ成核生长微观机理作了初步探讨．
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| 关 键 词： | 纺锤形α－FeOOH，合成，动力学 |
Studies on Kinetics of Spindle-Type a-FeOOH Crystallite Synthesis Process |
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| Chen Xueyuan, Zeng Huanxing, Wan Zhaokui, Luo Hongmei.Studies on Kinetics of Spindle-Type a-FeOOH Crystallite Synthesis Process[J].Journal of University of Science and Technology of China,1994(2). |
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| Authors: | Chen Xueyuan Zeng Huanxing Wan Zhaokui Luo Hongmei |
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| Institution: | Department of materials Science and Bngineering |
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| Abstract: | This paper studies the kinetic of Spindle-type a-FeOOH crystollite synthesis proceed in thesuspensions System of Fe (OH)2-PeCO3. The influence of the initial concentration, reaction temperature and air flow rate is investigated and the oxidation rate equations of a-FeOOH seed formation andseed growth process are determined by the experimential kinetics equation of heterogeneous reaction. Itis found that the dissolution-oxidation equilbrum exists in the a-FeOOH seed growth stage. The interface oxidation reaction is the rate-determining step of heterogeneous reaction. The mechanism of seedformation and seed growth is also described preliminarily. |
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| Keywords: | spindle-type goethite synthesis kinetics |
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