| 程序升温还原技术研究针形超微粒α-Fe_2O_3还原过程动力学 |
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| 引用本文： | 李春忠,洪智富.程序升温还原技术研究针形超微粒α-Fe_2O_3还原过程动力学[J].化工学报,1995,46(6):734-740. |
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| 作者姓名： | 李春忠 洪智富 |
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| 作者单位： | 华东理工大学技术化学物理研究所!上海200237,华东理工大学技术化学物理研究所!上海200237,华东理工大学技术化学物理研究所!上海200237,华东理工大学技术化学物理研究所!上海200237,华东理工大学技术化学物理研究所!上海200237 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 在针形γ-Fe_2O_3磁粉制备过程中,还原过程是关键步骤之一,本文利用程序升温还原技术研究了针形超微粒a-Fe_2O_3还原过程机理,建立了还原过程动力学研究方法,得到了a-Fe_2O_3在氮氢混合气体中还原动力学方程,并进一步研究了该还原过程动力学特征,给出了还原过程的优化操作条件.
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| 关 键 词： | 磁粉 α－Fe2O3 还原 超微粒 程序升温 氧化铁 |
REDUCTION KINETICS OF ACICULAR UITRAFINE α-Fe_2O_3 PARTICLES BY TPR TECHNOLOGY |
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| Li Chunzhong,Hong Zhifu,Zhu Yihua,Zheng Baicun and Hu Liming.REDUCTION KINETICS OF ACICULAR UITRAFINE α-Fe_2O_3 PARTICLES BY TPR TECHNOLOGY[J].Journal of Chemical Industry and Engineering(China),1995,46(6):734-740. |
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| Authors: | Li Chunzhong Hong Zhifu Zhu Yihua Zheng Baicun and Hu Liming |
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| Abstract: | The reduction process is very important for acicular magnetic powder preparation. In this paper, the mechanism of acicular ultrafine a-Fe2O3 particle reduction process was investigated by TPR, The study method for reduction kinetics was established and the operation condition was investigated. The kinetic equation for α-Fe2O3 reduction was proposed. This equation can be used at 300℃-450℃ for the reduction of pure α-Fe2O3 particles. The optimized temperature for acicular α- Fe2O3 powder reduction was at 360℃-400℃. |
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