3 results about "Material Absorption" patented technology

The application relates to the material field and provides a layered Ti3C2T x / MXene loaded FeCo nanoparticle composite material, a preparation method and application, FeCo nanoparticles prepared by a hydrothermal method and Ti3C2T x / MXene are combined by an electrostatic self-assembly method, so that a layered composite material is obtained, FeCo nanoparticles with soft magnetic properties are loaded between layers and on the surface of the Ti3C2T x / MXene material, and the FeCo nanoparticles can adjust the dielectric property of the composite material, so that the composite material can be widely applied in the wave absorption field. The application has the advantages of simple equipment, low production cost, high production efficiency and green pollution-free. The composite material is a high-reflection and low-absorption material in a 170-220 GHz frequency band, and the absorption rate is 10-30%. In a 0.2-3 THz range, the product prepared by the method also has a wave absorption effect, and the absorption coefficient is 100-150 cm ‑1 .

The application relates to the technical field of wave-absorbing materials, in particular to a wide-band calcium ferrite wave-absorbing material and a preparation method and application thereof. 1.8 La 0.2‑x Ce x Fe2O5, wherein 0<=x<0.14. The application solves the problems of narrow absorption frequency band and low efficiency of the oxide wave-absorbing material by adjusting the composition and dielectric properties of the material through La and Ce double-element co-doping, and the prepared material has the advantages of wide absorption frequency band and high absorption intensity.

The invention relates to a three-band metamaterial wave absorber based on artificial intelligence aided design, and belongs to the technical field of artificial electromagnetic materials. The invention aims to solve the problems of low absorption efficiency, narrow bandwidth, large thickness and sensitivity to incident wave polarization state of the traditional wave-absorbing material. The wave absorber adopts a periodically arranged array unit structure, each unit is composed of a metal resonance layer, a dielectric layer and a metal back plate from top to bottom, and the metal resonance layer comprises two coaxial closed resonance rings and four 90-degree fan-shaped metal patches which are symmetrically distributed. Structural size parameters are optimized through an artificial intelligence aided design method, the advantages of three-band high absorptivity, polarization insensitivity, ultra thinness and compactness are achieved, and the sensor has the remarkable effects of being simple in structure, low in cost and easy to manufacture and is suitable for high-performance electromagnetic wave absorption and sensing application.