Electromagnetic Wave Absorption Performance of Co–Fe Alloy: Review and Perspective

With advancements in science and technology, electromagnetic waves have played a huge role in many fields but also pose numerous risks. Hence, the research of high-performance wave-absorbing materials has evolved into a pivotal research topic. As a magnetic metal, Co-Fe alloy possesses the attributes of robust saturation magnetization and conductivity. Furthermore, it exhibits excellent application potential in disparate frequency bands and can be easily combined with various materials. And their composites have emerged as noteworthy studies as absorbent materials. In this perspective, the various preparation methods of Co-Fe alloys and related composites are systematically discussed. The ratios of Fe and Co were analyzed; then, the properties and characteristics of the composites of Co-Fe alloys with carbonaceous materials, metal compounds, and conductive polymers are summarized and discussed. Additionally, the shortcomings and development directions of Co-Fe alloy absorbers are pointed out, which will be conducive to innovation and research and development of absorbing materials in the future.