摘要
采用化学共沉+高温助熔工艺制备了铁氧体Ba(Zn(1-x)Cox)2Fe16O27粉体,然后用模压法制备了铁氧体粉体/环氧树脂复合材料板,采用同轴电缆法测定了复合材料的电磁参数。研究表明,随着铁氧体中Co含量增加,铁氧体主相由BaZn2Fe16O27转变成Ba-Co2Fe16O27,材料磁损耗逐渐加强,复合材料与空气的电磁匹配特性在频率低于12GHz时较好。然后将M-玻璃纤维/环氧树脂复合材料置于铁氧体粉体/环氧树脂复合材料前端组合成多层复合材料结构,复合材料板与空气的电磁匹配性能和吸波性能都有很大提高。数据如下:当复合材料结构中x=0.75铁氧体吸波层厚度为2.0mm,结构总厚度5.3mm时,复合结构反射系数R的绝对值在2～8GHz时>4dB、在8～18GHz时>10dB的吸波性能。
The ferrite powders/epoxy composite panels were prepared by molding method,which the ferrite powders Ba（Zn（1-x）Cox）2Fe16O27 were synthesized through chemical co-precipitation combining high temperature flux techniques.The electromagnetic parameters of the composite panels were investigated by coaxial cable method.Results showed that with increasing the content of Co,the main phase of the ferrite powders was transformed from BaZn2Fe16O27to BaCo2Fe16O27and corresponding the magnetic loss was increased gradually. The composite panels＇electromagnetic matching with air was relatively good when the frequency below 12.4 GHz.Furthermore,when connecting the ferrite powders/epoxy-based composite panels and M-glass fibers/epoxy-based composite panels together to form a multi-composite panels,there was a significant improvement in the electromagnetic matching performance.The specific results are as follows：when the thickness of the ferrite powders and the multi-composite panels absorbing layer were set to 2.0mm（x=0.75）and 5.3mm,respectively.Corresponding absolute values of the reflection coefficient of the multi-composite panels was over 4dB at the frequency from 2to 8GHz,while over 10dB at the frequency from 8to 18GHz.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第10期1750-1752,共3页
Journal of Functional Materials
基金
江西省科技支撑资助项目(kj200813)
