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Aerogel-metal composite material, and preparation method and application thereof

A metal composite material and airgel technology, applied in the direction of silica, silicon oxide, etc., can solve the problems of lack of depth in the comprehensive utilization of airgel, and achieve the effects of high strength, convenient operation, and low density

Inactive Publication Date: 2017-03-29
HONGDA TECH BEIJING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, the main research direction of aerogels has been focused on its preparation, and the comprehensive utilization of aerogels still lacks in-depth development.

Method used

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  • Aerogel-metal composite material, and preparation method and application thereof
  • Aerogel-metal composite material, and preparation method and application thereof
  • Aerogel-metal composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Set the density to 0.01g / cm 3Add the silica airgel into a high-speed pulverizer, and pulverize at a speed of 2000-50000r / min for 1-200min to obtain silica airgel powder. Pass the above powder through 100-mesh, 1000-mesh, and 2500-mesh sieves in sequence to obtain an airgel powder with a particle size of about 5 μm. The above-mentioned silica airgel powder and aluminum powder are mixed uniformly in a certain ratio, and the volume ratio of the airgel powder to the aluminum powder is 1:1 to 1:25. The particle size of the aluminum powder used is 300 mesh. The mixture of the above-mentioned airgel and aluminum powder is placed in a closed container, and heated from room temperature to 660-800°C under the protection of nitrogen, with a heating rate of 5-200°C / min. After the aluminum is melted, stir with a certain intensity to further mix the system evenly. The holding time is 0-4 hours. After skimming off impurities such as oxidized slag in the upper layer, transfer the m...

Embodiment 2

[0036] According to the method described in Example 1, a uniform silica airgel powder with a particle size of about 5 μm was prepared. Melting aluminum particles with a certain particle size under the protection of nitrogen, the particle size of the aluminum particles used is 0.1-20mm, and the heating rate is 5-200°C / min. After the aluminum particles are completely melted, add the above-mentioned airgel powder. The volume ratio of the airgel powder to the aluminum liquid is 1:1 to 1:25. Stir with a certain intensity to make the system evenly mixed. By adopting the cooling molding and demoulding methods described in Example 1, the silica airgel-aluminum porous composite material with a certain shape can be obtained, and the density of the gained composite material is 1.82-2.64g / cm 3 .

Embodiment 3

[0038] According to the method described in embodiment 1, the density is 0.030g / cm 3 The alumina airgel was pulverized and sieved to obtain uniform alumina airgel powder. The above-mentioned alumina airgel powder and copper powder are mixed evenly in a certain ratio, and the volume ratio of the airgel powder and copper powder is 1:1 to 1:25. The particle size of the copper powder used is preferably 300 mesh to 10 mesh. The mixture of the above-mentioned airgel and copper powder is placed in a closed container, and heated from room temperature to 1100-1300° C. under the protection of argon, with a heating rate of 5-200° C. / min. After the copper is melted, stir with a certain intensity to further mix the system evenly. The holding time is 0-4 hours. After skimming off impurities such as oxidized slag on the upper layer, transfer the mixture of copper liquid and alumina airgel into a mold, and cool and form at a cooling temperature of 5-100°C / min. After the mixture is cooled ...

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Abstract

The invention relates to an aerogel-metal composite material, and a preparation method and application thereof. In the aerogel-metal composite material provided by the invention, an aerogel is dispersed in a metal material. The particle size of the aerogel is preferably ranged from 0.1mu m to 10cm. The aerogel is provided with holes with the size being preferably ranged from 3nm to 100nm. The preparation method of the aerogel-metal composite material comprises the following steps of after mixing the aerogel and the metal, heating to melt the metal, or mixing the aerogel and the metal melt liquid, and then cooling the mixture in a die to obtain the aerogel-metal composite material. The composite material provided by the invention has the characteristics of low density and high strength, and can be used as a novel structure material so as to be applied in the fields of spaceflight, military, buildings, machinery and the like.

Description

technical field [0001] The invention relates to a porous metal material and a preparation method thereof, in particular to an airgel-metal porous composite material and a preparation method thereof. Background technique [0002] As an important porous material, metal porous material is a new type of engineering material with dual properties of function and structure. This lightweight material not only retains the weldability, electrical conductivity, and good mechanical stability of metals, but also has low density, large specific surface area, high porosity, electromagnetic shielding, good permeability, low thermal conductivity, and energy absorption. The characteristics of porous materials such as shock absorption and noise reduction. Porous metal materials are of great significance in the fields of filtration and separation, fluid distribution and control, heat exchange, energy absorption and shock absorption, noise reduction, electrode material manufacturing, catalyst a...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/08
CPCC01B33/14
Inventor 杨国强张涛王双青李光武
Owner HONGDA TECH BEIJING CO LTD
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