금속질산염을 이용한 Fe-Ni 나노분말의 제조 및 특성
Synthesis and Properties of Fe-Ni Nano-sized Powders using Metal Nitrates
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The calcination and hydrogen-reduction behavior of Fe- and Ni-nitrate have been investigated. Fe2O3/NiO composite powders were prepared by chemical solution mixing of Fe- and Ni-nitrate and calcination at 350℃ for 2 h. The calcined powders were hydrogen-reduced at 350℃ for 30 min. The calcination and hydrogenreduction 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 Fe2O3/NiO phase transformed to FeNi3 phase at the temperature of 350℃. The activation energy for the hydrogen reduction, evaluated by Kissinger method, was measured as 83.0 kJ/㏖.
Abstract
The calcination and hydrogen-reduction behavior of Fe- and Ni-nitrate have been investigated. Fe2O3/NiO composite powders were prepared by chemical solution mixing of Fe- and Ni-nitrate and calcination at 350℃ for 2 h. The calcined powders were hydrogen-reduced at 350℃ for 30 min. The calcination and hydrogenreduction 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 Fe2O3/NiO phase transformed to FeNi3 phase at the temperature of 350℃. The activation energy for the hydrogen reduction, evaluated by Kissinger method, was measured as 83.0 kJ/㏖.
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