机载龙伯透镜天线用聚苯乙烯泡沫塑料的制备及介电常数调控

发布时间：2018-10-20 14:58

【摘要】：针对雷达通讯微波频段新型轻质介电复合材料的迫切需求,开展高介电性能复合材料的研究具有现实意义。采用悬浮聚合法制备不同密度的聚苯乙烯泡沫,研究了聚苯乙烯泡沫的介电常数与密度之间的关系,分析了钛酸钡粉末的介电性能。采用干混法添加钛酸钡粉末制备介电常数可调控的轻质钛酸钡/聚苯乙烯复合泡沫。聚苯乙烯泡沫的介电常数随密度增大,表现出弱的频率依赖性和低介电损耗。钛酸钡粉末具有高的介电常数和较低的介电损耗。BaTiO_3/PS复合材料的介电常数随着BaTiO_3含量的增加而升高。相同介电常数的BaTiO_3/PS复合材料和聚苯乙烯泡沫相比,密度显著下降,说明添加BaTiO_3可以实现介电材料的轻质化。
[Abstract]:In order to meet the urgent need of new light dielectric composites in microwave frequency band of radar communication, it is of practical significance to develop the research of high dielectric properties composite materials. Polystyrene foam with different densities was prepared by suspension polymerization. The relationship between dielectric constant and density of polystyrene foam was studied. The dielectric properties of barium titanate powder were analyzed. The light barium titanate / polystyrene composite foam with adjustable dielectric constant was prepared by adding barium titanate powder into dry mixing process. The dielectric constant of polystyrene foam increases with density, showing weak frequency dependence and low dielectric loss. Barium titanate powder has high dielectric constant and low dielectric loss. The dielectric constant of BaTiO_3/PS composites increases with the increase of BaTiO_3 content. The density of the BaTiO_3/PS composites with the same dielectric constant was significantly lower than that of the polystyrene foam, indicating that the addition of BaTiO_3 could achieve the light-weight of the dielectric materials.
【作者单位】：空军驻长沙地区军事代表室;国防科技大学新型陶瓷纤维及其复合材料国防科技重点实验室;
【分类号】：TN821.5;TQ328.4

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