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ISSN 961-91393-0-5
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 Year 1997
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632 pages
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Volume price - $192.00
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CALCULATION OF INFRARED AND MICROWAVE RADIATIVE PROPERTIES OF METAL COATED MICROFIBERS
Leonid A. Dombrovsky
Joint Institute for High Temperatures, Moscow, Russia
ABSTRACT
Recent experimental investigations have shown that insulations containing metallized glass or polymer fibers are characterized by extremely high extinction coefficient for infrared radiation and, as a result, by very good heat shielding properties. The well-known evaluations indicated that this effect may be explained by unusual optical properties of single fibers. In this paper, the most general theoretical model for the radiation absorption and scattering by metallized fibers is employed. It is based on the rigorous theory of scattering by an arbitrary oriented two-layer cylinder and may be used for calculations in a wide spectral range. An accuracy of more simple models of metallized fibers is analyzed. In particular, the range of applicability of the perfectly conducting cylinder approximation is determined. A comparison with published experimental data shows a good agreement between the calculated and the experimental values of the equivalent specific extinction coefficient in the spectral range of 2.5 < λ < 27.5 μm. The computational data on the absorption and scattering of the microwave radiation by metallized dielectric fibers are presented for the first time. High values of the absorption efficiency factor for single submicron fibers may be of interest for microwave technique applications.
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