Electromagnetic wave absorption properties of mechanically mixed Nd(2)Fe(14)B/C microparticles

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	Electromagnetic wave absorption properties of mechanically mixed Nd(2)Fe(14)B/C microparticles
	X. G. Liu; S. W. Or; S. L. Ho; D. Y. Geng; Z. G. Xie; H. Wang; Z. D. Zhang
	2011
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	509 期号:6 页码:2929-2932
摘要	Nd(2)Fe(14)B/C microparticles were prepared by a mechanical mixing technique using a weight ratio of 2:1. Paraffin-bonded Nd(2)Fe(14)B/C composites were fabricated using 40 wt% microparticles, and their electromagnetic wave absorption properties were studied and compared with those of the paraffin-bonded Nd(2)Fe(14)B composites in the 2-18 GHz frequency range and for 1-5 mm thickness. The Nd(2)Fe(14)B/C-paraffin composites exhibit dual dielectric resonance in complex relative permittivity (epsilon(r)) and essentially flat response in complex relative permeability (mu(r)) rather than showing an abrupt change in both epsilon(r) and mu(r) as in the Nd(2)Fe(14)B-paraffin composites. The results are ascribed to the increased electrical resistivity in the Nd(2)Fe(14)B/C-paraffin composites and the protection on the magnetic properties of the Nd(2)Fe(14)B microparticles at 2-18 GHz by the presence of the C phase. Large reflection loss (RL) exceeding -10 dB and an optimal RL of -13.2 dB are achieved in the Nd(2)Fe(14)B/C-paraffin composites from 9.6 to 18 GHz at a thickness of 1.4-2.6 mm and at 18 GHz at a thickness of 1.4 mm, respectively. (C) 2010 Elsevier B.V. All rights reserved.
部门归属	[liu, xianguo; or, siu wing; ho, s. l.] hong kong polytech univ, dept elect engn, kowloon, hong kong, peoples r china. [liu, xianguo; geng, dianyu; xie, zhigao; wang, han; zhang, zhidong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [liu, xianguo; geng, dianyu; xie, zhigao; wang, han; zhang, zhidong] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;or, sw (reprint author), hong kong polytech univ, dept elect engn, kowloon, hong kong, peoples r china;eeswor@polyu.edu.hk
关键词	Carbon Complex Permeability Complex Permittivity Electromagnetic Wave Absorption Nd(2)Fe(14)b Reflection Loss Microwave-absorption Magnetic-properties Nanocapsules Nanocomposites Composites Range Iron
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30546
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. G. Liu,S. W. Or,S. L. Ho,et al. Electromagnetic wave absorption properties of mechanically mixed Nd(2)Fe(14)B/C microparticles[J]. Journal of Alloys and Compounds,2011,509(6):2929-2932.
APA	X. G. Liu.,S. W. Or.,S. L. Ho.,D. Y. Geng.,Z. G. Xie.,...&Z. D. Zhang.(2011).Electromagnetic wave absorption properties of mechanically mixed Nd(2)Fe(14)B/C microparticles.Journal of Alloys and Compounds,509(6),2929-2932.
MLA	X. G. Liu,et al."Electromagnetic wave absorption properties of mechanically mixed Nd(2)Fe(14)B/C microparticles".Journal of Alloys and Compounds 509.6(2011):2929-2932.