磁织构化处理对铁砂电波吸收材料性能的影响

The Influence of Magnetic-Texture Treatment on Specific Properties of Iron-Sand EM Wave Absorption Material

在铁砂基电波吸收材料中掺入单轴各向异性的BaFe12 O19单畴微粒 ,经磁织构化处理 ,使吸收量从 19dB提高到2 4.2dB ,吸收峰的位置由 9.2 5GHz移向低频 8.6GHz ,10dB带宽从 1.6 5GHz增至 2 .5GHz ,A～h曲线出现双峰 ,匹配厚度增加 ,对其作用机理进行了初步探讨。

Mix anisotropic uniaxial single-domain BaFe 12 O 19 particle into compound iron-sand foundation EM wave absorption material,with magnetic-texture treatment,we can find the absorption quantity increase from 19dB to 24.2dB,the absorption peak shifts from 9.25GHz to low frequency 8.6GHz,10dB bandwidth increase from 1.65GHz to 2.5GHz,there are two absorption peaks in the curve of A～f,matching thickness is also increased.This thesis is a preliminary discussion of mechanism of the action.