 | Nanotech 2006 Vol. 1
Technical Proceedings of the 2006 NSTI Nanotechnology Conference and Trade Show, Volume 1
Chapter 4: Nanoparticle Processes & Applications |
| | Structural and Magnetic Properties study of CoFe2O4 Nanopowder prepared by Mechanical Milling using metallic Cobalt and Hematite powder Blend |
| Authors: | A. Beitollahi, R. Sani, Yu.V. Maksimov and I.P. Suzdalev |
| Affilation: | Iran University of Science and Technology (IUST), IR |
| Pages: | 431 - 434 |
| Keywords: | nanopowder, cobalt ferrite, mechanical activation |
| Abstract: | In this work we report the phase formation and magnetic properties of CoFe2O4 nanopowder prepared by mechanical alloying technique using metallic cobalt and hematite powder (1:1 molar ratio) as the initial raw material in ambient air atmosphere. The formation of single phase cobalt ferrite of (Co2+ 0.18Fe3+ 0.82)[Co2+ 0.82 Fe3+ 1.18]O4 stoichiometry was confirmed for the samples milled above 15 hours without any heat-treatment by XRD and Mössbauer techniques. The average crystallite size of the sample milled for 30 h was ~ 13 nm. The highest room temperature value of the saturation magnetization (51 e.m.u./g) was obtained for the sample milled for 25h which was much lower than the corresponding value of the bulk cobalt ferrite due to the size effect. |
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| ISBN: | 0-9767985-6-5 |
| Pages: | 871 |
| Hardcopy: | $185.00 |
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