The electromagnetic characteristics, of carbon foams

IMR OpenIR

	The electromagnetic characteristics, of carbon foams; The electromagnetic characteristics, of carbon foams
	Z. G. Fang; C. S. Li; H. Y. Sun; H. T. Zhang; J. S. Zhang
	2007 ; 2007
发表期刊	Carbon ; Carbon
ISSN	0008-6223 ; 0008-6223
卷号	45 期号:15 页码:2873-2879
摘要	Three different pore size carbon foams with variable electric conductivities were prepared by a polymer sponge replication method. The electromagnetic parameters of these carbon foams and their corresponding pulverized powders were measured by a resonant cavity perturbation technique at a frequency of 2450 MHz. The results show that carbon foams have smaller dielectric constants but several times larger dielectric loss compared with their corresponding pulverized powders. Moreover, carbon foams show magnetic loss while no magnetic loss can be observed from their corresponding pulverized powders. The magnetic loss of carbon foams is apparently a kind of extrinsically magnetic loss and believed to be able to maintain at high temperatures. The electromagnetic characteristics of carbon foams demonstrate that macrostructure modification is an effective way to modulate electromagnetic properties of such materials. (C) 2007 Elsevier Ltd. All rights reserved.; Three different pore size carbon foams with variable electric conductivities were prepared by a polymer sponge replication method. The electromagnetic parameters of these carbon foams and their corresponding pulverized powders were measured by a resonant cavity perturbation technique at a frequency of 2450 MHz. The results show that carbon foams have smaller dielectric constants but several times larger dielectric loss compared with their corresponding pulverized powders. Moreover, carbon foams show magnetic loss while no magnetic loss can be observed from their corresponding pulverized powders. The magnetic loss of carbon foams is apparently a kind of extrinsically magnetic loss and believed to be able to maintain at high temperatures. The electromagnetic characteristics of carbon foams demonstrate that macrostructure modification is an effective way to modulate electromagnetic properties of such materials. (C) 2007 Elsevier Ltd. All rights reserved.
部门归属	[fang, zhigang; li, chusen; sun, hayan; zhang, hongtao; zhang, jinsong] chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhang, js (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;jshzhang@imr.ac.cn ; [fang, zhigang; li, chusen; sun, hayan; zhang, hongtao; zhang, jinsong] chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhang, js (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;jshzhang@imr.ac.cn
关键词	Microwave Dielectric-properties Microwave Dielectric-properties Silicon-carbide Foams Silicon-carbide Foams X-band X-band Composites Composites Matrix Matrix Black Black
URL	查看原文 ; 查看原文
WOS记录号	WOS:000252265800003 ; WOS:000252265800003
引用统计	被引频次：158[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33526
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. G. Fang,C. S. Li,H. Y. Sun,et al. The electromagnetic characteristics, of carbon foams, The electromagnetic characteristics, of carbon foams[J]. Carbon, Carbon,2007, 2007,45, 45(15):2873-2879, 2873-2879.
APA	Z. G. Fang,C. S. Li,H. Y. Sun,H. T. Zhang,&J. S. Zhang.(2007).The electromagnetic characteristics, of carbon foams.Carbon,45(15),2873-2879.
MLA	Z. G. Fang,et al."The electromagnetic characteristics, of carbon foams".Carbon 45.15(2007):2873-2879.