Ferrite composite wave-absorption material adopting foam aluminum as substrate

A composite wave-absorbing material and ferrite technology, which is applied in the field of composite wave-absorbing materials, can solve the problems of increasing energy loss and achieve the effect of enhancing temperature resistance

Active Publication Date: 2014-07-16
SUZHOU YUXI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the porous structure of aluminum foam makes electromagnetic waves reflect, scatter and interfere multiple times, increasing its energy loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Mixing: Weigh 100 grams of foaming agent (ingredients: 32 grams of dolomite, 35 grams of calcium carbonate, 10 grams of calcium sulfate, 13 grams of carbon powder, 10 grams of silicon powder), 1 kilogram of deionized water and 20 grams of polystyrene Vinyl alcohol, mixed with a vibration ball mill for 0.5 hour to obtain powder;

[0028] 2) Sand milling: put the above powder into a sand mill, and add 200 grams of nickel-zinc ferrite (component Fe 2 o 3 80 grams, 20 grams of NiO, 80 grams of ZnO, 20 grams of BaO, the particle size is 3 μm), 100 grams of aluminum powder, 40 grams of alumina powder, sand milling for 0.5 hours to obtain a slurry;

[0029] 3) Molding: Molding the above sanded slurry to obtain a green body;

[0030] 4) Foaming: After drying the green body, keep it at a constant temperature of 600°C for 5 minutes, and cool it naturally in the air to obtain a foamed aluminum / ferrite composite wave-absorbing material.

Embodiment 2

[0032] 1) Mixing: Weigh 100 grams of foaming agent (ingredients: 52 grams of dolomite, 25 grams of calcium carbonate, 5 grams of calcium sulfate, 10 grams of carbon powder, 8 grams of silicon powder), 5 kilograms of deionized water and 50 grams of polystyrene Vinyl alcohol, mixed with a vibration ball mill for 0.5 hour to obtain powder;

[0033] 2) Sanding: Put the above powder into a sand mill, and add 1 kg of nickel-zinc ferrite (component Fe 2 o 3 600 grams, 100 grams of Ni, 200 grams of ZnO, 100 grams of BaO, the particle size is 5 μm), 2 kilograms of aluminum powder, 1.25 kilograms of alumina powder, sand milling for 3 hours to obtain a slurry;

[0034] 3) Molding: Molding the above sanded slurry to obtain a green body;

[0035] 4) Foaming: After drying the green body, keep it at a constant temperature of 800°C for 10 minutes, and cool it naturally in the air to obtain a foamed aluminum / ferrite composite wave-absorbing material.

Embodiment 3

[0037] 1) Mixing: Weigh 100 grams of foaming agent (ingredients: 40 grams of dolomite, 30 grams of calcium carbonate, 6 grams of calcium sulfate, 18 grams of carbon powder, 6 grams of silicon powder), 3 kilograms of deionized water and 30 grams of formazan Base cellulose, mixed with a vibrating ball mill for 0.5 hour to obtain powder;

[0038] 2) Sand milling: put the above powder into a sand mill, and add 500 grams of nickel-zinc ferrite (component Fe 2 o 3 225 grams, 150 grams of NiO, 100 grams of ZnO, 25 grams of BaO, the particle size is 3 μm), 700 grams of aluminum powder, 300 grams of alumina powder, and sand milled for 2 hours to obtain a slurry;

[0039] 3) Molding: Molding the above sanded slurry to obtain a green body;

[0040] 4) Foaming: After drying the green body, keep the temperature at 650°C for 5 minutes, and cool it naturally in the air to obtain the aluminum foam / ferrite composite wave-absorbing material.

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Abstract

The present invention relates to a ferrite composite wave-absorption material adopting foam aluminum as a substrate. The ferrite composite wave-absorption material comprises, by mass, 5-15% of a foaming agent, 20-50% of ferrite, 25-40% of aluminum powder, and 10-25% of alumina powder. According to the present invention, 1) the problems of expensive price and harsh operation condition of application of TiH2 as the foaming agent can be solved with the foaming agent of the present invention; 2) with the foaming agent of the present invention, the raw material ratio can be changed to adjust the porosity and the pore size distribution of the foam aluminum so as to adjust the wave-absorption performance of the foam aluminum/ferrite composite material; 3) dolomite can be decomposed to produce a lot of gas, and the selected carbon powder and the silicon powder are adopted as the adjustment agent, such that the foaming performance of the foaming agent is adjusted, and the temperature resistance of the foam aluminum is enhanced; and 4) the foam aluminum/ferrite composite material can meet "thin, light, wide and strong" requirements.

Description

technical field [0001] The invention relates to a composite wave-absorbing material, in particular to a ferrite composite wave-absorbing material with aluminum foam as a matrix. Background technique [0002] With the popularization of high and new technologies such as computers, substations, wireless communication stations and sensors, wave-absorbing materials have entered the stage of being widely used. In people's daily work and life, the electromagnetic radiation and interference problems caused by the popularization of some electronic and electrical equipment are becoming more and more serious. The problems caused by electromagnetic wave radiation are gradually attracting public attention in today's pursuit of high-quality life. [0003] Absorbing materials can be divided into two types: interference type and absorbing type according to the working principle, and absorbing type absorbing materials can be divided into two types: magnetic loss type and electric loss type. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C29/12
Inventor 张宇左士祥
Owner SUZHOU YUXI NEW MATERIAL TECH
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