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

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number09A502
JournalJournal of Applied Physics
Volume107
Issue number9
DOIs
Publication statusPublished - May 1 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Investigation on electromagnetic and microwave absorbing properties of La0.7 Sr0.3 MnO3-δ /carbon nanotube composites'. Together they form a unique fingerprint.

  • Cite this