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›› 2015, Vol. 15 ›› Issue (1): 84-88.

• 反应与分离 • 上一篇    下一篇

草酸盐热分解法制备多孔FeNi合金粉及其热分解动力学

姚永林 张传福 樊友奇 湛菁   

  1. 建行马鞍山湖东路支行6217001700001909090 中南大学冶金与环境学院 安徽工业大学冶金工程学院 中南大学冶金与环境学院
  • 收稿日期:2014-10-27 修回日期:2014-11-25 出版日期:2015-03-13 发布日期:2015-03-13
  • 通讯作者: 姚永林

Preparation of Porous FeNi Alloy Powder by Oxalate Thermal Decomposition and the Kinetics

YAO Yong-lin ZHANG Chuan-fu FAN You-qi ZHAN Jing   

  1. School of Metallurgical Engineering, Anhui University of Technology School of Metallurgy and Environment, Central South University School of Metallurgical Engineering, Anhui University of Technology School of Metallurgy and Environment, Central South University
  • Received:2014-10-27 Revised:2014-11-25 Online:2015-03-13 Published:2015-03-13
  • Contact: YAO Yong-lin

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被引次数

2

摘要： 采用草酸盐热分解还原法制备了粒径1 mm的多孔结构FeNi合金粉，研究了草酸铁镍前驱体热分解过程. 结果表明，FeNi合金为纯BCC相，前驱体在加热过程中在217.5和352.5℃脱水和热分解释放出CO和CO2气体，产生多孔结构；前驱体热分解活化能为148.59 kJ/mol，热分解过程遵循随机成核和随后生长模型，指前因子为1.25×107，动力学方程为G(a)=[-ln(1-a)]0.44.

关键词: FeNi合金, 草酸盐, 热分解, 热分析, 动力学

Abstract: The porous FeNi alloy powder with a particle size of 1 mm and BCC structure was prepared by a thermal decomposition-reduction process of oxalate precursor, and the thermal decomposition process studied. The results showed that the precursor underwent two steps in the heating process, dehydration (217.5℃) and gas (CO and CO2) release (352.5℃), and the latter was the reason for the formation of porous structure. The thermal decomposition followed random nuclei production and nuclei growth model, the activation energy was 148.59 kJ/mol, the pre-exponential factor 1.25×107 and the kinetics function G(a)=[-ln(1-a)]0.44.

Key words: FeNi alloy, oxalate, thermal decomposition, thermal analysis, kinetics

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