Synthesis of air stable FeCo alloy nanocrystallite by proteic sol–gel method using a rotary oven

[Display omitted] •The synthesized FeCo alloy presented a high chemical stability against oxidation.•The use of a rotary oven is essential to obtain materials with low defect density, high purity and better homogeneity.•The reduction temperature influence on the formation of pure FeCo alloy and the...

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Veröffentlicht in:Journal of alloys and compounds 2015-02, Vol.622, p.408-417
Hauptverfasser: Braga, Tiago Pinheiro, Dias, Diego Felix, de Sousa, Matheus Falcão, Soares, João Maria, Sasaki, José Marcos
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Sprache:eng
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Zusammenfassung:[Display omitted] •The synthesized FeCo alloy presented a high chemical stability against oxidation.•The use of a rotary oven is essential to obtain materials with low defect density, high purity and better homogeneity.•The reduction temperature influence on the formation of pure FeCo alloy and the average crystallite size.•The hydrogen flow rate affect on the formation of pure FeCo alloy and the average crystallite size. Highly air stable FeCo nanocrystals were synthesized by the proteic sol–gel method using a rotary oven. The synthesized materials were characterized by TG, DTA, XRD, TPR, VSM, Mössbauer spectroscopy and FEG-SEM. The results showed the effect of temperature and the influence of the hydrogen flow rate on the formation of pure FeCo alloy and on the average crystallite size. The use of a rotary oven is efficient, directly influencing the homogeneity and the purity of the FeCo alloy. The synthesized alloy has highvalues of saturation magnetization according to the VSM results. The performed characterizations confirmed that the synthetic route is interesting in the formation of FeCo alloy nanocrystallites with high chemical stability.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2014.10.074