Regular Fe3O4 octahedrons with excellent soft magnetic properties prepared by dealloying technique

Jia, Shi, Song, Tingting, Zhao, Bingge, Zhai, Qijie and Gao, Yulai (2014) Regular Fe3O4 octahedrons with excellent soft magnetic properties prepared by dealloying technique. Journal of Alloys and Compounds, 585 580-586. doi:10.1016/j.jallcom.2013.10.017


Author Jia, Shi
Song, Tingting
Zhao, Bingge
Zhai, Qijie
Gao, Yulai
Title Regular Fe3O4 octahedrons with excellent soft magnetic properties prepared by dealloying technique
Formatted title
Regular Fe3O4 octahedrons with excellent soft magnetic properties prepared by dealloying technique
Journal name Journal of Alloys and Compounds   Check publisher's open access policy
ISSN 0925-8388
1873-4669
Publication date 2014-02-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.jallcom.2013.10.017
Volume 585
Start page 580
End page 586
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2014
Language eng
Formatted abstract
The dealloying processes of Al-15Fe (at.%) alloy ribbons consisting of two distinct phases of α-Al (Fe) and Al13Fe4 in NaOH solutions were investigated. The effects of NaOH solution concentration, dealloying temperature and time on the results were comparatively discussed. The as-dealloyed samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). It was found that all of the three experimental conditions could affect the morphology of the as-dealloyed samples, and the influence of solution concentration was the crucial factor. The Al could be leached out from both the α-Al (Fe) and Al13Fe4 phases to obtain regular octahedral Fe3O4 under most of the experimental conditions except for that in the 0.5 mol L-1 NaOH solution at ambient temperature. In particular, the Fe3O4 from dealloying Al-15Fe ribbons in 5 mol L-1 NaOH solution for 48 h at ambient temperature shows a uniform octahedral structure (average edge length: 667 ± 158 nm) and special magnetic properties (saturation magnetization: 83.3 emu g-1, residual magnetization: 10.4 emu g-1 and coercive force: 256.9 Oe), implying its potential applications in magnetic fluid, information storage, etc.
Keyword Al-Fe alloy
Dealloying
Fe3O4 octahedrons
Magnetic properties
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2014 Collection
 
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