کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1475156 | 991110 | 2011 | 4 صفحه PDF | دانلود رایگان |
Fine powder of iron oxide has been required in the preparation of ferromagnetic α″-Fe16N2 powder in low temperature nitridation. Magnetite and maghemite mixture was obtained by the reaction of iron acetylacetonate Fe(acac)3 in benzyl alcohol. It was reduced to α-Fe in hydrogen at 400 °C. Particle size of the α-Fe was 300 nm in the reduction of iron oxides obtained from 2 g of Fe(acac)3. It decreased to 100 nm in the preparation using 8 g of Fe(acac)3. After the successive nitridation under ammonia flow at 160 °C, the highest yield of α″-Fe16N2 in 66 wt.% was observed on the nitrided product from the latter α-Fe, because of the smallest α-Fe particle size after the reduction in the present study. The yield and reproducibility of α″-Fe16N2 formation in low temperature nitridation was improved using the iron oxide prepared in non-aqueous benzyl alcohol compared to the use of magnetite obtained from aqueous solution.
Journal: Journal of the European Ceramic Society - Volume 31, Issue 14, November 2011, Pages 2471–2474