结构型铁砂基复合电波吸收体研究

Iron sand based structural compound EM wave absorption material.

由天然尖晶石铁氧体（铁砂）为基制备的复合电波吸收材料，在７～１２ＧＨｚ，吸收率Ａ为１２～２７ｄＢ，匹配厚度ｄ为１．４ｍｍ。将几种铁砂基复合吸收材料制成双层结构电波吸收体，Ａ最大达４０ｄＢ，匹配厚度ｄ为１ｍｍ，频带增宽。这是一种廉价的吸收材料，其造价仅为一般铁氧体吸收材料的１／１０，有较大实用价值。

Of natural spinel ferrite(iron sand) based compound EM wave absorption material, the absorption rate A is 15～17 dB at 7～12 GHz, and the matching thickness 1.4 mm. When some iron sand based EM absorption materials be formed in a double layer structure, the absorption rate A will reach as high as 40 dB the matching thickness will reduce to 1 mm and the frequency bandwidth will increase. The cost is only 1/10 of the common ferrite absorption material.(3 refs )