Investigation on electromagnetic and microwave absorbing properties of La0.7 Sr0.3 MnO3-δ /carbon nanotube composites

C. Y. Tsay, R. B. Yang, D. S. Hung, Y. H. Hung, Y. D. Yao, C. K. Lin

研究成果: 雜誌貢獻文章

26 引文 斯高帕斯(Scopus)

摘要

In this study, the influence of the addition of carbon nanotube (CNT) (0, 0.5, 1.0, and 2.0 wt %) on complex permittivity, complex permeability, and reflection loss for La0.7 Sr0.3 MnO3-δ (LSMO)/polymer composites was investigated. Microwave absorbing composites were prepared by molding and curing a mixture of LSMO powders, CNTs, and epoxy resin. The complex permittivity and complex permeability for LSMO/CNT composites were examined by a cavity perturbation technique. The experimental results showed that the complex permittivity increased with increasing CNT addition and the imaginary part of the permeability decreased with rising frequency. In the present study, a microwave absorbing composite filled with 80 wt % LSOM powders and 2 wt % CNTs exhibited the optimum performance, that is, the microwave absorbing peak was -22.85 dB at 9.5 GHz and the -10 dB absorbing bandwidth reached 3.3 GHz for the sample with a matching thickness of 3 mm.
原文英語
文章編號09A502
期刊Journal of Applied Physics
107
發行號9
DOIs
出版狀態已發佈 - 五月 1 2010
對外發佈Yes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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