具有纳米晶铁磁坡莫合金型薄片的磁性复合材料中微波的传输、反射和耗散

Transmission, Reflection and Dissipation of Microwaves in Magnetic Composites with Nanocrystalline Finemet-Type Flakes.

作者信息

Rinkevich Anatoly B, Perov Dmitry V, Ryabkov Yuriy I

机构信息

M.N. Miheev Institute of Metal Physics UB RAS, Sofia Kovalevskaya St., 18, Ekaterinburg 620108, Russia.

Institute of Chemistry UB RAS, Pervomayskaya St., 48, Syktyvkar 167000, Russia.

出版信息

Materials (Basel). 2021 Jun 23;14(13):3499. doi: 10.3390/ma14133499.

DOI:10.3390/ma14133499

PMID:34201669

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8269561/

Abstract

The microwave properties of a composite material containing flakes of finemet-type nanocrystalline alloy placed in the epoxy matrix have been investigated. Two compositions have been studied: with 15% and 30% flakes. Frequency dependences of transmission and reflection coefficients are measured in the frequency range from 12 to 38 GHz. The dielectric permittivity and magnetic permeability are obtained, and the microwave losses are calculated. The dependences of transmission and reflection coefficients have been drawn as functions of wave frequency and thickness of the composite material, taking into account the frequency dependences of permittivity and permeability. The regions of maximal and minimal microwave absorption have been defined. The influence of wave interference on the frequency dependence of microwave absorption is studied.

摘要

对一种包含置于环氧基质中的铁磁纳米晶合金薄片的复合材料的微波特性进行了研究。研究了两种成分：含15%和30%薄片的情况。在12至38 GHz频率范围内测量了传输系数和反射系数的频率依赖性。获得了介电常数和磁导率，并计算了微波损耗。考虑到介电常数和磁导率的频率依赖性，绘制了传输系数和反射系数与波频率及复合材料厚度的函数关系。确定了最大和最小微波吸收区域。研究了波干涉对微波吸收频率依赖性的影响。