(华中科技大学 电子科学与技术系, 武汉 430074)
摘 要: 采用扁平化工艺以及绝缘包覆工艺对铁硅铝系软磁合金粉末进行改性。 对实验样品进行扫描电镜分析， 观察颗粒形貌对材料性能的影响； 探讨球磨时间以及不同绝缘介质含量对于材料电磁性能的影响规律。 根据单层吸波材料(含导电衬底)对电磁波的反射率公式的分析以及对不同样品反射率的计算可知， 球磨扁平化工艺以及绝缘包覆工艺可有效地改善铁硅铝金属粉末的微波吸收性能。 经改性后的铁硅铝系软磁金属粉末在1.0~3.5 GHz频段具有较好的吸波性能， 可应用于抗电磁干扰领域。
关键字: Fe-Si-Al系合金； 扁平化处理； 包覆工艺； 反射系数
（Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China）
Abstract: By flattening the metallic materials and by means of a chemical coating method, the anti-electromagnetic interference characteristic of the Fe-Si-Al magnetic alloy powder can be improved. The influence of different flattening time and the different additive contents of insulative materials on electro-magnetic parameters of Fe-Si-Al magnetic alloy powders were discussed. The formulas of reflection coefficient of absorbing materials with conduction bases was analysed. The results shows that this materials can be used as absorbing materials on 1.0-3.5 GHz.
Key words: Fe-Si-Al magnetic alloy powders; flattening; chemical coating method; reflection coefficient
