A composite hybrid structure reinforced by cobalt oxide (Co3O4), copper-copper oxide (Cu–Cu2O), and barium hexaferrite (BaFe12O19) was investigated. Chemical reduction and sol-gel were used for synthesizing reinforcement materials. Polyester resin was used as a matrix material. Synthesized powders were analyzed and characterized by using various characterization techniques such as differential thermal analysis, X-ray diffractions (XRD), vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), and particle size analysis. Three-Layer RAM structures were prepared layer by layer, and the concentration of the filler powders was the same in each layer. RAM structures were investigated using a vector network analyzer (VNA). Based on the radar absorbing analysis, the most effective absorption is possessed by sample RA5 50 wt%, which consists of two layers of cobalt oxide and one layer of copper-copper oxide. The maximum value of the reflection loss was- 45 dB at a frequency of 10.25 GHz.

中文翻译：

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通过溶胶-凝胶合成的氧化钴 (Co3O4)、铜-氧化铜 (Cu-Cu2O) 和六方铁氧体 (BaFe12O19) 增强的雷达吸波混合结构的研究

研究了由氧化钴 (Co3O4)、铜-铜氧化物 (Cu-Cu2O) 和六方铁氧体 (BaFe12O19) 增强的复合混合结构。化学还原和溶胶-凝胶用于合成增强材料。使用聚酯树脂作为基体材料。使用各种表征技术对合成粉末进行分析和表征，例如差热分析、X 射线衍射 (XRD)、振动样品磁力计 (VSM)、扫描电子显微镜 (SEM) 和粒度分析。逐层制备三层RAM结构，每层填料粉末的浓度相同。使用矢量网络分析仪 (VNA) 研究 RAM 结构。根据雷达吸收分析，最有效的吸收是样品RA5 50 wt%，它由两层氧化钴和一层铜-铜氧化物组成。反射损耗的最大值在 10.25 GHz 频率处为 45 dB。