With the continuous advancement of technology, the control and utilization of electromagnetic waves have become a research focus in many fields. However, achieving impedance matching with free space and high losses for a single soft magnetic material is a challenging task. To meet this demand,
Soft magnetic composite materialsemerge as the times require. This article will delve into the methods of regulating the absorption properties of soft magnetic composite materials, taking you to understand the research results of advanced institute technology in constructing soft magnetic composite materials and using interfaces to regulate their absorption properties.
1. Advantages of heterostructures
Over the years, researchers have conducted numerous encapsulation or coating experiments on FeSiAl alloys, forming heterostructures such as FeSiAl/ferrite, FeSiAl/graphite heterostructures, etc. These heterostructures significantly improve the absorbing performance of soft magnetic composite materials by changing the material of the outer layer and regulating the matching thickness between the two layers.
A heterostructure is formed by wrapping or coating a layer of FeSiAl alloy with a high matching layer (such as ferrite, graphite, etc.). This structure causes current polarization and electromagnetic induction effects at the interface during electromagnetic wave propagation, effectively enhancing the magnetic permeability of the material. In addition, by adjusting the matching thickness between the two layers of materials, the impedance matching performance of soft magnetic composite materials can be further improved, enabling them to absorb electromagnetic waves more effectively.
2. Application of nuclear shell structure
In addition to heterostructures, core-shell structures are also improved
Soft magnetic composite materialsAn effective method for improving absorption performance. The core-shell structure is formed on FeSiAl alloy by encapsulating one or more layers of other materials (such as Al2O3, SiO2, etc.), such as FeSiAl@Al2O3 @SiO2 core-shell structure. This structure has attracted widespread interest in the field of materials science due to its unique advantages.
In the core-shell structure, the outer coating material serves as a matching layer, enabling the soft magnetic composite material to have good impedance matching performance. Meanwhile, by regulating the thickness of different materials and the interaction between interfaces, the magnetic permeability of soft magnetic composite materials can be further improved, thereby achieving better absorption performance.
3. Wide application of soft magnetic composite materials
In addition to common soft magnetic materials such as FeSiAl, Mn Zn ferrite, Ni Zn ferrite, etc., in recent years, the composite of soft magnetic alloys and carbon materials has also become a hot topic in the research of absorbing materials. These new soft magnetic composite materials combine the advantages of various materials and broaden the application range of absorbing materials.
The research on soft magnetic composite materials not only has wide applications in the military field, such as stealth technology and electronic warfare equipment, but also plays an important role in communication, radar and other fields. For example, the electromagnetic absorption performance of soft magnetic composite materials is superior, which can effectively reduce the interference of electromagnetic radiation on surrounding electronic devices and improve the reliability of communication transmission.
With the excellent performance of soft magnetic composite materials, they have also been widely used in fields such as construction, automobiles, and electronic products to reduce the impact of electromagnetic waves on the environment and human health.
Conclusion:
Soft magnetic composite materialsBy constructing heterostructures and core-shell structures, the absorption performance has been successfully regulated. This material not only plays an important role in the military field, but also has broad application prospects in fields such as communication, construction, and automobiles. With the continuous advancement of technology, we believe that the application of soft magnetic composite materials in the field of electromagnetic wave control will become more widespread. Let us look forward to more breakthroughs and innovations in the research of soft magnetic composite materials.
