Abstract Designing novel structure to optimize the dielectric constant and permeability was believed as an effective way to improve the performances of wave-absorbing material. In this work, PVA coating containing homogeneously-distributed graphene oxide (GO) was firstly deposited onto the surface of carbonyl iron powder (CIP), which was then followed by a heat-treatment to obtain rGO/PVA/CIP composite materials. The electromagnetic parameters (relative complex permittivity and permeability) and corresponding loss mechanism of the as-prepared rGO/PVA/CIP composites were investigated in a frequency of 2.0–18.0 GHz. It was found that the presence of well-dispersed rGO could effectively improve the dielectric loss of the composites and microwave absorption capability without sacrificing magnetic loss. The effective absorbing width (reflection loss lower than −10 dB) of PVA/CIP composite containing 1 mg/g GO was measured to be ∼8.4 GHz.

中文翻译：

---

rGO/CIP/PVA复合材料的制备及其微波吸收性能

摘要 设计新颖的结构以优化介电常数和磁导率被认为是提高吸波材料性能的有效途径。在这项工作中，首先将含有均匀分布的氧化石墨烯 (GO) 的 PVA 涂层沉积在羰基铁粉 (CIP) 的表面上，然后进行热处理以获得 rGO/PVA/CIP 复合材料。在 2.0-18.0 GHz 的频率下研究了所制备的 rGO/PVA/CIP 复合材料的电磁参数（相对复介电常数和磁导率）和相应的损耗机制。发现分散良好的rGO的存在可以有效地提高复合材料的介电损耗和微波吸收能力，而不会牺牲磁损耗。