Electromagnetic-wave absorbing material with interstitial modulation characteristics and production method of electromagnetic-wave absorbing material

Abstract

The invention discloses an electromagnetic-wave absorbing material with the interstitial modulation characteristics and a production method of the electromagnetic-wave absorbing material. The general formula of the electromagnetic-wave absorbing material is R<2>Fe<17>N<x>C<y>, wherein the R refers to combination of any one or multiple rare earth elements of Y, Ce, Nd, Pr, Sm, Gd, Tb, Dy, Ho, Er, Tm and Lu, the x and the y respectively refer to nitrogen and carbon content entering the lattice gap position, 0< / =<x>+<y>< / =9, and the x and the y are not equal to 0 at the same time; the electromagnetic-wave absorbing material is an R<2>Fe<17>-type master alloy billet formed by mixing and melting the rare earth element R and an iron element and is obtained by subjecting the master alloy billet coarse crushing prior to being introduced into clearance carbon atoms and / or nitrogen atoms to have magnetism of a master alloy crystal modulated. The electromagnetic-wave absorbing material has high absorbing capability on high-frequency electromagnetic waves ranging from 1GHz to 100GHz in smaller matching thickness, and the characteristics of accurate operation frequency modulation can be realized by the production method and according to different use conditions.

Description

technical field [0001] The present invention relates to an electromagnetic wave absorbing material, in particular to an electromagnetic wave material specially suitable for working in a high-frequency and wide-band environment higher than 1G Hz after the material properties are precisely modulated by using interstitial atoms (C, N, etc.). Background technique [0002] With the continuous expansion and improvement of the application fields and frequency bands of electromagnetic waves in modern society, it has become increasingly important for researchers to develop new and efficient electromagnetic wave absorbing materials (referred to as wave absorbing materials) for the purpose of radiation protection and energy absorption of electromagnetic waves. pressing challenge. From electromagnetic pollution control and electromagnetic radiation protection for civilian use; to military applications, stealth technology for radar signals; and in the field of scientific research, electr...

AI Technical Summary

Problems solved by technology

[0005] However, the existing technology still has the disadvantages of the following aspects: 1. The absorption rate is not high, especially in the frequency bands above 5 and 6 GHz, it is difficult to achieve effective absorption strength; 2. The working frequency range is narrow, especially to achieve effective absorption. The bandwidth range of the absorption rate (<-20dB) is smaller; 3. The matching thickness is too large. Usually, in order to achieve the absorption strength that meets the basic work needs, the matching thickness needs to be more than 3mm, and even up to 6-7mm

This situation makes the existing absorbing materials almost impossible to apply in some special fields, especially in the military.

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