In situ construction of Fe3Al@Al2O3 core-shell particles with excellent electromagnetic absorption

doi:10.1016/j.jcis.2021.12.084

CORC > 兰州理工大学 > 兰州理工大学

	In situ construction of Fe3Al@Al2O3 core-shell particles with excellent electromagnetic absorption
	Luo, Xixi 1,2; Zhang, Kaikai 3; Zhou, Yingying 1; Wu, Hongjing 4,5; Xie, Hui 1
刊名	Journal of Colloid and Interface Science
	2022-04-01
卷号	611 页码:306-316
关键词	Absorption Alumina Aluminum Aluminum oxide Atoms Binary alloys Circular waveguides Electromagnetic wave absorption Electromagnetic waves Heat treatment Nanoparticles Argon atmospheres Core shell Core/shell particles Diffusion rate Fe atoms In-situ construction Microwave absorption Microwave absorption properties Thermal Trace amounts
ISSN号	0021-9797
DOI	10.1016/j.jcis.2021.12.084
英文摘要	To obtain Fe3Al@Al2O3 core-shell absorbents, DO3-type Fe3Al powder was thermal treated in an argon atmosphere containing a trace amount of oxygen at different temperatures. Since Al atoms have a higher diffusion rate than that of the Fe atoms, Al atoms can migrate to the surface of the Fe3Al particle and in-situ convert to Al2O3 nanoparticles during the thermal treatment process. With the increase of the thermal treatment temperature, the Al2O3 nanoparticles grow larger, exhibiting different microwave absorption properties. In particular, the Fe3Al@Al2O3 obtained by controllable oxidation at 800 exhibits the best microwave absorption properties, with the minimum reflection loss of −34 dB at 11.5 GHz when the thickness is 2 mm, and the bandwidth below −10 dB is as broad as 6.7 GHz. Since a dielectric Al2O3 shell with a proper thickness can increase the impedance matching ratio of the Fe3Al absorbent, more electromagnetic waves can come into the absorbent. In addition, the magnetic Fe3Al core can efficiently attenuate the absorbed electromagnetic waves by dimensional resonance and natural resonance. © 2021 Elsevier Inc.
WOS研究方向	Chemistry
语种	英语
出版者	Academic Press Inc.
WOS记录号	WOS:000766366500004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157841]
专题	兰州理工大学
作者单位	1.School of Materials Engineering, Xi'an Aeronautical University, Xi'an; 710077, China; 2.State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 3.School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an; 710021, China; 4.MOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, China; 5.School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang; 453007, China
推荐引用方式 GB/T 7714	Luo, Xixi,Zhang, Kaikai,Zhou, Yingying,et al. In situ construction of Fe3Al@Al2O3 core-shell particles with excellent electromagnetic absorption[J]. Journal of Colloid and Interface Science,2022,611:306-316.
APA	Luo, Xixi,Zhang, Kaikai,Zhou, Yingying,Wu, Hongjing,&Xie, Hui.(2022).In situ construction of Fe3Al@Al2O3 core-shell particles with excellent electromagnetic absorption.Journal of Colloid and Interface Science,611,306-316.
MLA	Luo, Xixi,et al."In situ construction of Fe3Al@Al2O3 core-shell particles with excellent electromagnetic absorption".Journal of Colloid and Interface Science 611(2022):306-316.