Microwave absorption in percolating metal-insulator composites

D. T. Zimmerman; J. D. Cardellino; K. T. Cravener; K. R. Feather; N. M. Miskovsky; G. J. Weisel

doi:10.1063/1.3036900

Microwave absorption in percolating metal-insulator composites

D. T. Zimmerman, J. D. Cardellino, K. T. Cravener, K. R. Feather, N. M. Miskovsky, G. J. Weisel

Division of Mathematics & Natural Sciences (Altoona)

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

We measure several electromagnetic properties of tungsten-Teflon composites as a function of metal volume concentration. The electric (E) and magnetic (H) loss tangents at 2.45 GHz and the dc conductivity each exhibits a percolation transition at a different critical value of the metal volume fraction p. Moreover, the transition behavior depends on the average particle size and size distribution of the metal component. We explain the variation in each case by a schematic model derived from established percolation theory and the distinct response of conducting particles to microwave electric and magnetic fields.

Original language	English (US)
Article number	214103
Journal	Applied Physics Letters
Volume	93
Issue number	21
DOIs	https://doi.org/10.1063/1.3036900
State	Published - 2008

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3036900

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title = "Microwave absorption in percolating metal-insulator composites",

abstract = "We measure several electromagnetic properties of tungsten-Teflon composites as a function of metal volume concentration. The electric (E) and magnetic (H) loss tangents at 2.45 GHz and the dc conductivity each exhibits a percolation transition at a different critical value of the metal volume fraction p. Moreover, the transition behavior depends on the average particle size and size distribution of the metal component. We explain the variation in each case by a schematic model derived from established percolation theory and the distinct response of conducting particles to microwave electric and magnetic fields.",

author = "Zimmerman, {D. T.} and Cardellino, {J. D.} and Cravener, {K. T.} and Feather, {K. R.} and Miskovsky, {N. M.} and Weisel, {G. J.}",

note = "Funding Information: We acknowledge funding from the National Science Foundation (NSF/RUI: DMR-0406584), The Pennsylvania State University, Altoona College, and valuable discourse with Dr. E. J. Johnson and Professor J. Ma during the early stages of this work. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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doi = "10.1063/1.3036900",

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AU - Zimmerman, D. T.

AU - Cardellino, J. D.

AU - Cravener, K. T.

AU - Feather, K. R.

AU - Miskovsky, N. M.

AU - Weisel, G. J.

N1 - Funding Information: We acknowledge funding from the National Science Foundation (NSF/RUI: DMR-0406584), The Pennsylvania State University, Altoona College, and valuable discourse with Dr. E. J. Johnson and Professor J. Ma during the early stages of this work. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2008

Y1 - 2008

N2 - We measure several electromagnetic properties of tungsten-Teflon composites as a function of metal volume concentration. The electric (E) and magnetic (H) loss tangents at 2.45 GHz and the dc conductivity each exhibits a percolation transition at a different critical value of the metal volume fraction p. Moreover, the transition behavior depends on the average particle size and size distribution of the metal component. We explain the variation in each case by a schematic model derived from established percolation theory and the distinct response of conducting particles to microwave electric and magnetic fields.

AB - We measure several electromagnetic properties of tungsten-Teflon composites as a function of metal volume concentration. The electric (E) and magnetic (H) loss tangents at 2.45 GHz and the dc conductivity each exhibits a percolation transition at a different critical value of the metal volume fraction p. Moreover, the transition behavior depends on the average particle size and size distribution of the metal component. We explain the variation in each case by a schematic model derived from established percolation theory and the distinct response of conducting particles to microwave electric and magnetic fields.

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Microwave absorption in percolating metal-insulator composites

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