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http://dx.doi.org/10.4150/KPMI.2009.16.3.191

Synthesis and Properties of Fe-Ni Nano-sized Powders using Metal Nitrates  

Joo, Min-Hee (Department of Materials Science and Engineering, Seoul National University of Technology)
Oh, Sung-Tag (Department of Materials Science and Engineering, Seoul National University of Technology)
Publication Information
Journal of Powder Materials / v.16, no.3, 2009 , pp. 191-195 More about this Journal
Abstract
The calcination and hydrogen-reduction behavior of Fe- and Ni-nitrate have been investigated. $Fe_2O_3$/NiO composite powders were prepared by chemical solution mixing of Fe- and Ni-nitrate and calcination at $350^{\circ}C$ for 2 h. The calcined powders were hydrogen-reduced at $350^{\circ}C$ for 30 min. The calcination and hydrogen-reduction behavior of Fe- and Ni-nitrate were analyzed by TG in air and hydrogen atmosphere, respectively. TG and XRD analysis for hydrogen-reduced powders revealed that the $Fe_2O_3$/NiO phase transformed to $FeNi_3$ phase at the temperature of $350^{\circ}$. The activation energy for the hydrogen reduction, evaluated by Kissinger method, was measured as 83.0 kJ/mol.
Keywords
Fe-80 wt% Ni nano-sized powder; Metal nitrates; Hydrogen reduction; Activation energy;
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