Opening remarks:
Electromagnetic wave absorbing materialsIt has a wide range of applications in the field of electromagnetic compatibility of electronic and communication devices. With the rise of 5G and radar communication technology, the demand for broadband absorbing materials is increasing. However, how to achieve wideband effective absorption while ensuring thin thickness is currently an important challenge in the development of absorbing material applications.
Innovation breakthrough: Breakthrough in high-frequency rare earth soft magnetic and Fe based amorphous powder electromagnetic wave absorbers
1. Breakthrough in high-frequency rare earth soft magnetic materials
High frequency rare earth soft magnetic materialsIt is an absorbing material composed of rare earth Ce2Fe17N3- δ silica gel composite. This material achieved an absorption effect of -60.5dB at a frequency of 9.97GHz, with a thickness of only 1.7mm. This means that it can effectively absorb electromagnetic waves, resulting in less or even no reflection. In addition, it can also cover the spectrum range of the X-band (8-12 GHz).
2. Breakthrough in Fe based amorphous powder electromagnetic wave absorbers
Fe based amorphous powder electromagnetic wave absorber is an absorbing material made by using Fe based amorphous powder material. The material achieved a strong absorption effect of -60.3dB at a frequency of 7.08 GHz, and its effective absorption bandwidth is 2.3 GHz. This means that it can achieve effective absorption over a wide spectral range. In addition, there is currently a Co based amorphous wire X-band thin layer absorbing material that can achieve an effective absorption bandwidth of 3.6 GHz.
Structural design innovation: composite design of carbonyl iron and carbon nanotubes
Recently, the Advanced Institute of Science and Technology's Soft Magnetic Materials team conducted an innovative research and designed a wideband multi-layer electromagnetic wave absorbing material. This material is achieved through a composite structure of carbonyl iron, carbon nanotubes, and Ce2Fe17N3- δ. By adjusting the thickness of the carbon nanotube layer, different frequencies of electromagnetic waves can achieve differentiated reflection/transmission effects. Research has shown that this material achieves effective absorption of broadband electromagnetic waves at a frequency of 12.6 GHz, with a frequency range of 5.4-18 GHz. Surprisingly, the total thickness of this material is only 2.4mm, achieving wideband effective absorption at thin thicknesses.
Summary:
Electromagnetic wave absorbing materialsIt has a wide range of applications in the field of electromagnetic compatibility of electronic and communication devices. Recent research breakthroughs have shown that high-frequency rare earth soft magnetic materials and Fe based amorphous powder electromagnetic wave absorbers have made significant progress in achieving wideband effective absorption. In addition, the composite structure design of carbonyl iron and carbon nanotubes has opened up new ideas for the research and development of absorbing materials. These innovative breakthroughs provide new possibilities for the development of absorbing materials and make important contributions to the advancement of technologies such as 5G and radar communication. I believe that with the advancement of more research and development, absorbing materials will play a more important role in the field of electromagnetic wave applications.
