Magnetic multiresonance behavior of Fe@Al2O3 nanoembedments and microstructural evolution during mechanosynthesis
Resource
Journal of Alloys and Compounds, 509(18), 5600-5603
Journal
Journal of Alloys and Compounds
Pages
5600-5603
Date Issued
2011
Date
2011
Author(s)
Shi, Zhi-cheng
Zhang, Zi-dong
Guo, Jing-yan
Gao, Meng
Qi, Xiao-gang
Bi, Jian-qiang
Fan, Run-hua
Abstract
The embedding of metal nanoparticles into an insulating ceramic matrix can provide encapsulation and prevent their oxidation and agglomeration. A nanoembedment powder with the Fe nanoparticles embedded into Al 2O3 matrix is prepared by high-energy ball milling. Starting from the highly exothermic reactant mixture of magnetite and aluminum, Fe nanoparticles were in situ formed in Al2O3 matrix by mechanochemical reaction. It is found that a post-reaction milling significantly narrows the size distribution of Fe nanoparticles. The mechanism for the two-stage milling process was proposed. The microwave permeability of nanoembedments exhibited a multiresonance behavior, which was the evidence for monodispersed Fe nanoparticles. The Fe@Al2O3 nanoembedments are potential candidates as microwave absorber and left-handed materials. © 2011 Elsevier B.V. All rights reserved.
SDGs
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
189.pdf
Size
23.45 KB
Format
Adobe PDF
Checksum
(MD5):1efdac22dadf27e0a2a746bec0ee3325