Synthesis, characterization and magnetic properties of microcrystalline lithium cobalt ferrite from spent lithium-ion batteries

被引：65
|
作者：
Bahat, M. [1 ]
Farghaly, F. E. [1 ]
Basir, S. M. Abdel [1 ]
Fouad, O. A. [1 ]
机构：
[1] Cent Met Res & Dev Inst, Cairo 11421, Egypt
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2007年 / 183卷 / 01期
关键词：
spent Li-ion batteries; ferrites; microcrystalline materials; magnetic properties;
D O I：
10.1016/j.jmatprotec.2006.10.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microcrystalline Li/Co ferrite composite of about 0.14 mu m crystallite size has been synthesized successfully by treating a mixture of cathode material of spent lithium-ion batteries and iron oxide at temperatures >= 1000 degrees C and for >= 4 h firing times. XRD analyses indicate that Li0.5Fe2O4/CoFe2O4 composite is formed. Microstructure investigation using optical microscopy reveals the formation of homogeneous structure with non-uniform size and shape of two ferrite phases. At lower temperature (900 degrees C) and shorter time (1 h) impure ferrite phase with the presence of unreacted Co-3 O-4 and Fe,03 phases is detected. It is found that the coercivity (Hc) and saturation magnetization (Ms) values of synthesized Li/Co ferrite composite increased with increasing the firing time and temperature from 153.6 to 177 Oe and from 58.7 to 76.3 emu/g, respectively. Based on the obtained results, the prepared material can be used as a permanent magnet. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：117 / 121
页数：5
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