Al薄膜对玻璃纤维增强树脂基复合材料电磁性能的影响  

Effect of Al Film on the Electromagnetic Properties of Glass Fiber Reinforced Resin Matrix Composite

作　　者：陈育秋[1,2] 祖亚培 宫骏[1] 孙超[1] 王晨[3] 

机构地区：[1]中国科学院金属研究所,沈阳110016 [2]中国科学院大学,北京100049 [3]澳汰尔工程软件(上海)有限公司,上海200436

出　　处：《金属学报》2017年第11期1511-1520,共10页Acta Metallurgica Sinica

摘　　要：利用高频电磁场计算软件FEKO对Al薄膜与玻璃纤维增强树脂基复合材料的电磁波反射率进行了仿真计算。研究了复合材料介电常数实部er、电损耗角正切tande、磁导率mr及磁损耗角正切tandm对反射率的影响,并通过仿真计算与实际测试结果对比,确定了仿真模型中玻璃纤维增强树脂基复合材料的等效电磁参数。研究了Al薄膜与玻璃纤维增强树脂基复合材料结构中Al薄膜厚度对反射率的影响,仿真计算与测试结果表明,Al薄膜厚度对复合材料的反射率影响较大,Al薄膜与玻璃纤维增强树脂基复合材料结构中存在一个最佳电阻值,使该结构谐振反射最小。根据传输线理论,利用MATLAB对谐振最强时对应电阻的大小进行了求解。通过计算不同结构的Al薄膜与玻璃纤维增强树脂基复合材料,得到了仿真模型中Al薄膜与磁控溅射制备Al薄膜的厚度关系。确定了仿真模型中各材料的等效电磁参数,仿真计算结果与测试结果吻合较好。Metallic thin films have many properties that bulk metals do not possess, such as high impedance. Recently, increasing attention has been paid to high impedance surface in the design of antennas and absorbers. Metallic thin films used in composite materials can realize the perfect matching of electromagnetic wave in different materials. The use of metallic thin films in electromagnetic functional materials results in significant increase of the absorbing intensity and operating bandwidth. But it usually needs to pay a huge amount of manpower, material resources and a longer period of time to design excellent electromagnetic functional materials with metallic films. So it is greatly significant to understand clearly the electromagnetic influence of metallic film for designing excellent performance materials and saving costs by simulation software. AI film is a typical non-magnetic metal film. In this work, the electro- magnetic refiectivity of AI films and glass fiber reinforced resin matrix composite had been studied. High frequency electromagnetic field calculation software FEKO was employed to calculate the reflection coef- ficient of the composites. The effect of composites＇ real part of permittivity ε, dielectric loss tangent tanδ permeability μ and magnetic loss tangent tan＆. on microwave reflectivity had been discussed. The equiv- alent electromagnetic parameters of glass fiber reinforced resin matrix composite had been obtained through a comparison between simulation and experimental results. Due to resonance phenomena of the embedded AI film in the glass fiber reinforced resin matrix composite with certain thickness, there is an optimum resistance value of AI film that makes the composite structure have minimum reflection. Through the calculation of AI film and glass fiber reinforced resin matrix composite with different struc- ture, the thickness relationship between AI films in calculation and AI films prepared by magnetron sputter- ing had been obtained. According to the theory of transmission l

关 键 词：Al薄膜 玻璃纤维增强树脂基复合材料 等效电磁参数 仿真 谐振 电阻 

分 类 号：O484.5[理学—固体物理] TB43[理学—物理]