Infrared and microwave radiative properties of metal coated microfibres

Revue Générale de Thermique Pub Date : 1998-12-01 DOI:10.1016/S0035-3159(98)80017-2

Leonid A. Dombrovsky

{"title":"Infrared and microwave radiative properties of metal coated microfibres","authors":"Leonid A. Dombrovsky","doi":"10.1016/S0035-3159(98)80017-2","DOIUrl":null,"url":null,"abstract":"<div><p>Recent experimental investigations have shown that insulations containing metallised glass or polymer fibres are characterised by an extremely high extinction coefficient for infrared radiation and, as a result, by very good heat shielding properties. This may be explained by the unusual optical properties of single fibres. In this paper, the most general theoretical model for the radiation absorption and scattering by metallised fibres 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. The accuracy of some simple models of metallised fibres is analysed. In particular, the range of applicability of the perfectly conducting cylinder approximation is determined. A comparison with published experimental data shows good agreement between the calculated and the experimental values of the equivalent specific extinction coefficients in the spectral range of 2.5 < λ < 27.5 μm. Computational data on the absorption and scattering of microwave radiation by metallised dielectric fibres are presented for the first time. High values of the absorption efficiency factor for single submicron fibres may be of interest for microwave applications.</p></div>","PeriodicalId":101133,"journal":{"name":"Revue Générale de Thermique","volume":"37 11","pages":"Pages 925-933"},"PeriodicalIF":0.0000,"publicationDate":"1998-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0035-3159(98)80017-2","citationCount":"8","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Revue Générale de Thermique","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0035315998800172","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 8

Abstract

Recent experimental investigations have shown that insulations containing metallised glass or polymer fibres are characterised by an extremely high extinction coefficient for infrared radiation and, as a result, by very good heat shielding properties. This may be explained by the unusual optical properties of single fibres. In this paper, the most general theoretical model for the radiation absorption and scattering by metallised fibres 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. The accuracy of some simple models of metallised fibres is analysed. In particular, the range of applicability of the perfectly conducting cylinder approximation is determined. A comparison with published experimental data shows good agreement between the calculated and the experimental values of the equivalent specific extinction coefficients in the spectral range of 2.5 < λ < 27.5 μm. Computational data on the absorption and scattering of microwave radiation by metallised dielectric fibres are presented for the first time. High values of the absorption efficiency factor for single submicron fibres may be of interest for microwave applications.

查看原文本刊更多论文

金属包覆微纤维的红外和微波辐射特性

最近的实验研究表明，含有金属化玻璃或聚合物纤维的绝缘体具有极高的红外辐射消光系数，因此具有非常好的热屏蔽性能。这可以用单根纤维不同寻常的光学特性来解释。本文采用了金属化光纤辐射吸收和散射的最一般的理论模型。它基于严格的任意取向双层柱体散射理论，可用于宽光谱范围内的计算。分析了几种简单的金属化纤维模型的精度。特别地，确定了完全导电圆柱体近似的适用范围。与已发表的实验数据比较表明，在2.5 <光谱范围内，等效比消光系数的计算值与实验值吻合较好;λ& lt;27.5μm。本文首次给出了金属化介质光纤对微波辐射的吸收和散射的计算数据。单亚微米纤维的高吸收效率系数值可能是微波应用的兴趣。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Revue Générale de Thermique

自引率

0.00%

发文量