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Graphite/barium ferrite composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material, barium ferrite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as the toxicity and hazards of composite materials, achieve the effects of reducing operating costs, good application prospects, and avoiding toxicity hazards

Active Publication Date: 2013-01-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve existing preparation graphene / Fe 3 o 4 There is a problem of toxicity and hazards in the process of composite materials, and a graphene / barium ferrite composite absorbing material and its preparation method are provided

Method used

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  • Graphite/barium ferrite composite wave-absorbing material and preparation method thereof
  • Graphite/barium ferrite composite wave-absorbing material and preparation method thereof

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specific Embodiment approach 1

[0008] Specific implementation mode 1: This implementation mode is a graphene / barium ferrite composite absorbing material. The graphene / barium ferrite composite absorbing material is composed of barium ferrite suspension and concentration of 0.5mol / L~5mol / L of graphite oxide aqueous dispersion prepared.

[0009] The mass ratio of the barium ferrite in the barium ferrite suspension described in this embodiment to the graphite oxide aqueous dispersion with a concentration of 0.5 mol / L-5 mol / L is 9:(1-2).

[0010] Barium ferrite is a typical magnetic loss absorbing material with better absorbing performance but higher density.

[0011] Using a scanning electron microscope to characterize the morphology of the graphene / barium ferrite composite wave-absorbing material described in this embodiment, and using a vector network analyzer to evaluate the wave-absorbing performance of the graphene / barium ferrite composite wave-absorbing material, It can be seen that the graphene / barium ...

specific Embodiment approach 2

[0012] Specific embodiment two: This embodiment is a preparation method of graphene / barium ferrite composite wave-absorbing material, which is completed according to the following steps: 1. Prepare graphite oxide aqueous dispersion: put graphite oxide into deionized Perform ultrasonic dispersion in water to obtain a graphite oxide aqueous dispersion with a concentration of 0.5mol / L~5mol / L; 2. Preparation of barium ferrite suspension: put barium ferrite with a particle size of 50nm~2μm into deionized water Perform ultrasonic dispersion to obtain a barium ferrite suspension uniformly dispersed by ultrasonic; 3. Ultrasonic treatment: add the barium ferrite suspension to the graphite oxide aqueous dispersion with a concentration of 0.5mol / L~5mol / L for ultrasonic dispersion , to obtain the ultrasonic blend; 4. Hydrothermal treatment: transfer the ultrasonic blend to the reactor for hydrothermal treatment to obtain the reduced product; 5. Drying treatment: The reduced product is firs...

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 2 is: the specific operation of the ultrasonic dispersion described in step 1 is as follows: Ultrasonic dispersion is performed for 60 min to 300 min with the assistance of ultrasound at a frequency of 20 KHz to 100 KHz. Others are the same as in the second embodiment.

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Abstract

The invention provides a preparation method of a graphite / barium ferrite composite wave-absorbing material, relating to a preparation method of a graphite-loaded magnetic particle barium ferrite. The invention aims to solve the problem that toxicity hazards exist in the existing graphite / Fe3O4 composite preparation processes. The method comprises the following steps: I. preparing the graphite oxide aqueous dispersion liquid; II. preparing the barium ferrite suspension; III. carrying out ultrasonic treatment; IV. carrying out hydrothermal treatment; and V. carrying out washing and drying treatment. The material and the preparation method have the following advantages: I. the operation cost and the operation difficulty are reduced, nonhazardous operation is achieved, and the material has the advantage of environment friendliness; and II. the prepared material has excellent wave-absorbing property and has good application prospect in the field of electromagnetic wave absorbing materials. The preparation method is mainly used for preparing the graphite / barium ferrite composite wave-absorbing material.

Description

technical field [0001] The invention relates to a preparation method of graphene-supported magnetic particle barium ferrite. Background technique [0002] Graphene is a layer of carbon atoms with a thickness of one atom. As a new type of carbon material, it has unique properties in terms of mechanics, quantum and electricity. Since its discovery in 2004, it has become an important research hotspot. Graphene is a typical dielectric loss absorbing material, and its light weight makes it have great research potential in the field of electromagnetic absorbing; in "Graphene / Fe 3 o 4 Preparation of Composite Materials and Electromagnetic Wave Absorption Properties" using graphene and Fe 3 o 4 Prepared graphene / Fe 3 o 4 Composites, Graphene / Fe 3 o 4 Because of the addition of Fe in the composite 3 o 4 To enhance the electromagnetic wave-absorbing ability of graphene, but this method uses hydrazine hydrate as a reducing agent, and hydrazine hydrate is a highly toxic chemica...

Claims

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Application Information

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IPC IPC(8): C09K3/00
Inventor 王亚明巩艳秋曹建云周玉贾德昌欧阳家虎
Owner HARBIN INST OF TECH
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