用铁砂研制的铁氧体电波吸收材料

以铁砂为原料制备一种尖晶石型铁氧体电波吸收材料，在７－１２Ｈｚ范围，发现有两个吸收峰，吸收量在９－１３ｄＢ，将铁氧体吸收体和铁砂吸收体组成复合电波吸收材料，亦有两个吸收峰，一峰向低频区偏移，吸收量增至１４．６ｄＢ；以复合吸收体为基础材料，在其中添加六角铁氧体和稀土元素，可改变吸收峰位置，提高吸收量，阳大可达２７ｄＢ。

Ferrite Electromagnetic Wave Absorption Materials Prepared from Iron Sand

Iron sand was used as raw material to prepare a kind of spinel type ferri.EM wave Absorption Material,and two absorption peaks with 9 to 13 dB absorptivity were foundover a frequency range of 7 to 12 GHz. By mixing ferrite and iron sand,a composite AbsorptionMaterial was formed with two absorption peaks,one of which shifts towards low frequency withits absorptivity increasing to 14. 5dB. The addition of magneto plumbite ferrite and rare earth tothe composite material can change the position of absorption peak and increase absorptivity to amaximum of 27 dB.