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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Complex permeability and electromagnetic wave absorption properties of amorphous alloy-epoxy composites
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Complex permeability and electromagnetic wave absorption properties of amorphous alloy-epoxy composites

机译：非晶态合金-环氧树脂复合材料的复磁导率和电磁波吸收特性

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摘要

Electromagnetic wave absorption properties of amorphous alloy-epoxy composites have been investigated with various amorphous alloy particle sizes and fractions in the 45 MHz to 10 GHz frequency range. The fraction of amorphous alloy in amorphous alloy-epoxy composites varied from 30 to 60vol.% at a fixed amorphous alloy particle size and the size of amorphous alloy particles was varied from several mum to 125 mum at a fixed amorphous alloy particle fraction. Complex permeability (mu), permittivity, (epsilon) of composites and reflection loss were measured by the reflection/transmission technique. The composites with small sized amorphous alloy particles (<26 mum) and a small amount of particles (<50%) had good reflection loss values less than -20dB with thin thickness, (<1 cm). The decreasing amorphous alloy particle size and fraction in amorphous alloy-epoxy composites resulted in a high minimum reflection loss frequency and small minimum reflection loss thickness. Variations of minimum reflection loss frequency and thickness of composites resulted from variations of materials constants such complex permeability. permittivity, and resonance frequency. Changes in materials variables were due to the demagnetization effect and the eddy current effect, which operate differently in composites according to amorphous alloy particle size and fraction. (C) 2004 Elsevier B.V. All rights reserved.
机译：已经研究了非晶合金-环氧树脂复合材料在45 MHz至10 GHz频率范围内的各种非晶合金颗粒尺寸和分数下的电磁波吸收特性。在固定的非晶态合金颗粒尺寸下，非晶态合金-环氧树脂复合材料中的非晶态合金份额在30％至60vol。％之间变化，在固定的非晶态合金颗粒分数下，非晶态合金颗粒的尺寸在几微米至125微米之间变化。通过反射/透射技术测量复合物的复数渗透率（μ），介电常数，ε和反射损耗。具有小尺寸非晶合金颗粒（<26微米）和少量颗粒（<50％）的复合材料具有良好的反射损耗值，其厚度薄（<1 cm）时小于-20dB。非晶态合金-环氧树脂复合材料中非晶态合金粒径和分数的减小导致最小反射损耗频率高，最小反射损耗厚度小。复合材料的最小反射损耗频率和厚度的变化是由材料常数（例如复数磁导率）的变化引起的。介电常数和共振频率。材料变量的变化归因于退磁效应和涡流效应，它们根据非晶态合金的粒径和分数在复合材料中的作用不同。 （C）2004 Elsevier B.V.保留所有权利。

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