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| 1 | Ceramsite Containing Iron Oxide and its Use as Functional Aggregate in Microwave Absorbing Cement-based Materials显示文摘Electromagnetic(EM) wave absorbing cement-based composite has promising applications in protecting civil and military buildings from electromagnetic interferences. A new idea of preparing EM wave absorbing cement-based composite is proposed by using ceramsite containing iron oxide as EM wave absorbing functional aggregate. The ceramsite was synthesized by adding 10 wt% Fe_3O_4 into clay and sintering at 1 200 ℃, which shows obvious dielectric and magnetic loss properties for electromagnetic wave. The maximum reflection loss(RL) of the concrete specimens prepared with the ceramsite is between-10.2--10.7 dB(corresponding to absorption greater than 90% EM energy) in the bandwidth of 8-18 GHz. In addition, the compressive strength at 28 days age of the concrete is 46 MPa, showing the potentiality of being used as structural components in buildings. | 何永佳 LI Guangfeng 李洪斌 Lü Linnü HE Liu | 2018 | Journal of Wuhan University of Technology(Materials Science)2018，33，1： | 5 |
| 2 | 基于机械球磨法的茂金属PE/石墨/碳纳米管导电复合材料的制备及性能研究显示文摘以茂金属PE为基体,以石墨和碳纳米管为导电填料,采用机械球磨法,制备茂金属PE/石墨/碳纳米管导电复合材料,考察球磨时间、球磨温度、球磨转速和石墨含量等对复合材料导电性的影响。结果表明,在球磨时间60 min,球磨温度50℃,球磨转速150 r/min、导电填料15%石墨、5%碳纳米管的条件下,复合材料的电阻率降到1.36Ω·cm,可作为一种电磁屏蔽材料应用于电子元器件表面。 | 沈芳 余聪 李庆华 胡华宇 朱云鹏 梁景 黄祖强 张燕娟 覃宇奔 | 2019 | 应用化工2019，48，5： | 2 |
| 3 | Microwave Absorption and Mechanical Properties of Short-cutted Carbon Fiber/glass Fiber Hybrid Veil Reinforced Epoxy Composites显示文摘This work aims at investigating the microwave absorption and mechanical properties of short-cutted carbon fiber/glass fiber hybrid veil reinforced epoxy composites.The short-cutted carbon fibers(CFs)/glass fibers(GFs)hybrid veil were prepared by papermaking technology,and composites liquid molding was employed to manufacture CFs/GFs hybrid epoxy composites.The microstructure,microwave absorbing properties and mechanical properties of the hybrid epoxy composites were studied by using SEM,vector network analyzer and universal material testing,respectively.The reflection coefficient of the composites were calculated by the measured complex permittivity and permeability in the X-band(8.2-12.4 GHz)range.The optimum microwave absorption properties can be obtained when the content of CFs in the hybrid veil is 6 wt%and the thickness of the composites is 2 mm,the minimum reflection coefficient of-31.8 dB and the effective absorption bandwidth is 2.1 GHz,which is ascribed to benefitting impedance matching characteristic and dielectric loss of the carbon fiber.Simultaneously the tensile strength and modulus can achieve 104.0 and 2.98GPa,demonstrating that the CFs/GFs hybrid epoxy composites can be a promising candidate of microwave absorbing materials with high mechanical properties. | 陈威 ZHEN Bowen XIE Yuxuan 贺行洋 SU Ying WANG Jun WU Yan | 2023 | Journal of Wuhan University of Technology(Materials Science)2023，38，1： | 1 |
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