HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

Magnetite/maghemite mixture prepared in benzyl alcohol for the preparation of α"-Fe16N2 with α-Fe

Files in This Item:
JECS31-14_2471-2474.pdf341.44 kBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/47362

Title: Magnetite/maghemite mixture prepared in benzyl alcohol for the preparation of α"-Fe16N2 with α-Fe
Authors: Masubuchi, Y. Browse this author →KAKEN DB
Yamashita, S. Browse this author
Motohashi, T. Browse this author
Kikkawa, S. Browse this author
Niederberger, M. Browse this author
Keywords: Iron oxide
Iron nitride
Magnetic property
Nanoparticle
Non-aqueous synthesis
Issue Date: Nov-2011
Publisher: Elsevier
Journal Title: Journal of the European Ceramic Society
Volume: 31
Issue: 14
Start Page: 2471
End Page: 2474
Publisher DOI: 10.1016/j.jeurceramsoc.2011.02.001
Abstract: Fine powder of iron oxide has been required in the preparation of ferromagnetic α"-Fe16N2 powder in low temperature nitridation. Its particle size of about 30 nm and less humidity content was crucial in the reproducible α"-Fe16N2 preparation in high yield. Magnetite and maghemite mixture with about 40 nm particle size was obtained by the reaction of iron acetylacetonate Fe(acac)3 of more than 4 g dissolved in 40 mL benzyl alcohol. It was reduced to α-Fe in hydrogen at 400 ℃. 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 because smaller iron oxide was easily reduced sintering to larger α-Fe particle. After the successive nitridation under ammonia flow at 160℃, 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 by using the iron oxide prepared in non-aqueous benzyl alcohol compared to the use of magnetite obtained from aqueous solution. Benzyl alcohol was a useful solvent to obtain iron oxide fine powder having less humidity because of its very small water solubility.
Type: article (author version)
URI: http://hdl.handle.net/2115/47362
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鱒渕 友治

Export metadata:

OAI-PMH ( junii2 , jpcoar )

MathJax is now OFF:


 

 - Hokkaido University