抗电磁辐射碳纤维复合吸波材料优化设计与制备
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摘要
基于Maxwell-Garnett模型,计算出短切碳纤维/基体复合材料的等效介电常数;利用传输线理论并采用遗传算法进行短切碳纤维/基体复合吸波材料的优化设计。结果表明:碳纤维长度为1.02 mm,碳纤维体积分数为30.80%,材料厚度为2.46 mm时,复合吸波材料在2~18 GHz的带宽(小于-10 d B)可达7.11 GHz;基于优化参数制备的短切碳纤维/环氧树脂胶复合吸波材料的实验测量结果与优化设计计算结果基本相符;短切碳纤维复合材料能实现介电损耗与电磁波干涉相消的协同作用,在8~18 GHz频段具有良好的吸波性能和应用前景。
The equivalent permittivity of chopped carbon fiber/matrix composite was calculated based on MaxwellGarnett model. An optimal design of the chopped carbon fiber/matrix composite absorbing material was completed by using genetic algorithms and transmission line theory. Results showed that the bandwidth was 7.11 GHz at-10 d B in the range of 2 ~ 18 GHz under the conditions of carbon fiber length of 1.02 mm,carbon fiber volume fraction of 30.80% and composite material thickness of 2.46 mm. The experimental result of the chopped carbon fiber/epoxy composite prepared based on optimized parameters was approximately consistent with that of the calculated result. The chopped carbon fiber composite can realize the synergistic effect of dielectric loss and destructive interference of electromagnetic wave,presenting good absorbing ability in 8 ~ 18 GHz and application prospect.
The equivalent permittivity of chopped carbon fiber/matrix composite was calculated based on MaxwellGarnett model. An optimal design of the chopped carbon fiber/matrix composite absorbing material was completed by using genetic algorithms and transmission line theory. Results showed that the bandwidth was 7.11 GHz at-10 d B in the range of 2 ~ 18 GHz under the conditions of carbon fiber length of 1.02 mm,carbon fiber volume fraction of 30.80% and composite material thickness of 2.46 mm. The experimental result of the chopped carbon fiber/epoxy composite prepared based on optimized parameters was approximately consistent with that of the calculated result. The chopped carbon fiber composite can realize the synergistic effect of dielectric loss and destructive interference of electromagnetic wave,presenting good absorbing ability in 8 ~ 18 GHz and application prospect.
引文
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[3]陈雪刚,叶瑛,程继鹏.电磁波吸收材料的研究进展[J].无机材料学报,2011,26(5):449-452.
[4]张艳丹,唐璐,周克省,等.高能球磨与真空退火对纳米晶Fe Si Al微波特性的影响[J].矿冶工程,2016,36(1):111-113.
[5]张莹莹,迟伟东,沈曾民,等.沥青基短切炭纤维/石墨纤维表面镀镍及其吸波性能[J].炭素技术,2011,30(1):27-30.
[6]吴红焕,王晓艳,张玲,等.碳纤维吸波材料的研究进展[J].材料导报,2007,21(5):115-117.
[7]陈小凤,赵伯琳,高正平.单一定向铁纤维吸波涂料电磁参数的计算[J].磁性材料及器件,2003,34(4):23-25.
[8]何燕飞,龚荣洲,王鲜,等.蜂窝结构吸波材料等效电磁参数和吸波特性研究[J].物理学报,2008,57(8):5261-5263.
[9]周珑,王天民,杜心康,等.Mo-Al2O3金属陶瓷颗粒膜的光学常数研究[J].稀有金属材料与工程,2007,36(5):825-828.
[10]邓跃龙,蒋练军,贾平,等.基于亚铁磁材料-YIG的双负电磁特异材料的设计及电磁特性研究[J].长沙铁道学院学报(社会科学版),2011,12(1):225-228.
[11]缪秀平.具有组分梯度的复合体系的介电响应[J].镇江高专学报,2010,23(1):43-46.
[12]孙艳军,冷雁冰,董连和.蓝宝石红外窗口抗反射浮雕结构研究[J].红外技术,2011,33(2):92-95.
[13]李海华,黄康,王庆康.亚波长纳米结构宽波段抗反射特性[J].红外与激光工程,2011,40(2):267-269.
[14]黄科,冯斌,邓京兰.结构型吸波复合材料研究进展[J].高科技纤维与应用,2010,35(6):54-56.
[15]华伟.复杂电磁媒质介电系数测量方法及实验研究[D].成都:四川大学,2006.
[16]贺君,胡照文,邓联文,等.多晶铁纤维表面原位氧化及其微波吸收性能[J].矿冶工程,2016,36(3):98-101.
[17]Weiqlhofer W S,Lakhtakia A,Monzon J C.Maxwell-Garnett model for composites of electrically small uniaxial objects[J].Microwave and Optical Technology Letters,1993,6(12):681-683.
[18]Koledintseva M Y,Du Broff R E,Schwartz R W.A Maxwell Garnett model for dielectric mixtures containing conducting particles at optical frequencies[J].IEEE Trans Progress in Electromagnetics Research,2006,63:223-242.