Method and materials for microwave-assisted rapid preparation of binary alloy high-efficiency microwave-absorbing materials

The microwave-assisted solvothermal method is used to prepare carbon-based alloy composite materials, which solves the problems of insufficient absorption and easy corrosion and oxidation of metal alloy absorbing materials in the low-frequency band. It also enables the efficient and rapid preparation of absorbing materials with high saturation magnetic intensity, which are suitable for stealth materials of weapons and equipment.

CN117259778BActive Publication Date: 2025-09-26ROCKET FORCE UNIV OF ENG
2 Cites 0 Cited by

Patent Information

Application Number
CN202311255076.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-26
Publication Date
2025-09-26
Estimated Expiration
2043-09-26

AI Technical Summary

Technical Problem

Existing metal alloy absorbing materials absorb electromagnetic waves well in high-frequency bands but poorly in low-frequency bands. They are also prone to corrosion and oxidation in harsh environments, affecting their service life and performance.

Method used

A microwave-assisted solvothermal reaction method was adopted, with cobalt nitrate hexahydrate, dimethylimidazole and melamine as raw materials. Carbon-based alloy composite materials were prepared through microwave chemical reaction and tubular furnace heat treatment, forming a three-dimensional nano-skeleton structure with one-dimensional nanotubular hierarchical assembly, and cobalt-iron alloy particles grew within the carbon layer.

Benefits of technology

The efficient and rapid preparation of carbon-based alloy composite absorbing materials with high saturation magnetic strength has been achieved. They have excellent low-frequency electromagnetic wave absorption performance and resistance to oxidation and corrosion, and are suitable for stealth materials for weapons and equipment.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention discloses a method for rapidly preparing a binary alloy high-efficiency absorbing material using microwave assistance and the prepared absorbing material, comprising the following steps: (1) uniformly dispersing melamine in deionized water, and dispersing and dissolving cobalt nitrate hexahydrate in the above solution to form a precursor reaction solution A; (2) dispersing and dissolving dimethylimidazole in deionized water to form a solution B; (3) stirring and mixing solutions A and B and placing them in a microwave chemical reactor for solvent thermal reaction to obtain a composite precursor; (4) placing the obtained precursor and ferrocene in a tube furnace for heat treatment to obtain a hierarchical carbon-coated alloy final product. The prepared absorbing material has the characteristics of high electrical conductivity and high saturation magnetic intensity. The preparation method can achieve the advantages of large-scale, rapid preparation, simplicity, and good controllability of nano-absorbing materials, providing a reliable preparation method for high-efficiency electromagnetic wave absorbing materials.
Need to check novelty before this filing date? Find Prior Art