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Preparation method of solar heat absorption composite material

A technology of solar heat absorption and composite materials, which is applied in the field of preparation of solar heat absorption composite materials, and can solve the problems that ordinary heat absorption materials cannot meet the requirements of oxidation resistance of solar heat absorbers.

Inactive Publication Date: 2019-11-08
宁波宏翌能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problem that ordinary heat absorbing materials cannot meet the oxidation resistance of solar heat absorbing bodies, a preparation method of solar heat absorbing composite materials is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In parts by weight, weigh 20 parts of carbon fiber, 20 parts of nitric acid with a mass fraction of 10%, 20 parts of acetone, 12 parts of carboxymethyl cellulose, and 60 parts of deionized water, and place the carbon fiber in a shearing machine to cut After 5 minutes, short carbon fibers with an average length of 2mm were obtained. Put the short carbon fibers in a muffle furnace, heat-preserve and calcinate them at 500°C for 2 hours, and cool down to room temperature with the furnace to obtain pre-oxidized short carbon fibers. Add nitric acid to acetone. Stir at a speed of 160r / min for 10min to obtain a modified solution, add pre-oxidized short carbon fibers into the modified solution, place in a water bath at 40°C and stir at a speed of 180r / min for 10h, filter, take the filter cake, and use deionized water Wash until neutral, dry in an oven at 80°C for 1 hour to obtain modified short carbon fibers, add modified short carbon fibers and carboxymethyl cellulose to deioniz...

Embodiment 2

[0031] In parts by weight, weigh 25 parts of carbon fiber, 25 parts of nitric acid with a mass fraction of 10%, 25 parts of acetone, 15 parts of carboxymethyl cellulose, and 75 parts of deionized water, and place the carbon fiber in a shearing machine to cut 8 minutes to obtain short carbon fibers with an average length of 3mm. Place the short carbon fibers in a muffle furnace, heat-preserve and calcinate them at 525°C for 2.5 hours, and cool down to room temperature with the furnace to obtain pre-oxidized short carbon fibers. Add nitric acid to acetone and heat at room temperature. Stir at a speed of 170r / min for 13min to obtain a modified solution, add pre-oxidized short carbon fibers into the modified solution, place in a water bath at 45°C and stir at a speed of 190r / min for 11h, filter, take the filter cake, and use deionized Wash with water until neutral, dry in an oven at 85°C for 1.5 hours to obtain modified short carbon fibers, add modified short carbon fibers and carb...

Embodiment 3

[0033] In parts by weight, weigh 30 parts of carbon fiber, 30 parts of nitric acid with a mass fraction of 10%, 30 parts of acetone, 18 parts of carboxymethyl cellulose, and 90 parts of deionized water, and place the carbon fiber in a shearing machine to cut After 10 minutes, short carbon fibers with an average length of 4mm were obtained. Put the short carbon fibers in a muffle furnace, heat-preserve and calcinate them at 550°C for 3 hours, and cool down to room temperature with the furnace to obtain pre-oxidized short carbon fibers. Add nitric acid to acetone, and Stir at a speed of 180r / min for 15min to obtain a modified liquid, add pre-oxidized short carbon fibers into the modified liquid, place in a water bath at 50°C and stir at a speed of 200r / min for 12h, filter, take the filter cake, and use deionized water Wash until neutral, dry in an oven at 90°C for 2 hours to obtain modified short carbon fibers, add modified short carbon fibers and carboxymethyl cellulose to deion...

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Abstract

The invention relates to a preparation method of a solar heat absorption composite material, belonging to the technical field of solar energy. The preparation method prepares the solar energy heat absorption composite material by adding andalusite, silicon carbide and silicon nitride, wherein the andalusite is an aluminosilicate mineral; after the andalusite is heated to 1350 DEG C under normal pressure, the andalusite begins to be converted into acicular mullite parallel to original crystals; the mullized andalusite is resistant to quenching and shock heating, has large mechanical strength, strong thermal impact resistance, strong slag resistance, high load conversion point, extremely high chemical stability and extremely strong chemical corrosion resistance; silicon carbide bonded silicon nitride has good oxidation resistance. In addition to good wear resistance, the silicon carbide in the material has high thermal conductivity and low thermal expansion coefficient, so that the silicon nitride bonded silicon carbide has excellent thermal shock resistance and acts as an obstacle and delay role in the penetration of external erosion media, and the solar heat absorption composite material has good chemical stability.

Description

technical field [0001] The invention relates to a preparation method of a solar heat-absorbing composite material, which belongs to the technical field of solar energy. Background technique [0002] Traditional fossil energy sources such as oil, coal, and natural gas are being exhausted day by day, and the development of human beings has an increasing demand for energy, and the problem of energy shortage is imminent. Countries around the world have adopted a series of measures to replace traditional fossil energy with renewable energy. Solar thermal power generation technology is an effective solution to the problem of energy shortage developed in this context. Facts have proved that using solar energy to replace a part of fossil energy is a practical method. People have developed a variety of solar energy utilization technologies, such as solar water heaters, solar heating, solar drying, and solar thermal power generation. As mentioned above, the limitation of fossil energ...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/565C04B35/584C04B35/626C04B35/63F24S70/16
CPCC04B35/565C04B35/584C04B35/626C04B35/6303C04B35/80C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3244C04B2235/3463C04B2235/3826C04B2235/3873C04B2235/5248C04B2235/602C04B2235/656C04B2235/6562C04B2235/667C04B2235/9607F24S70/16Y02E10/40
Inventor 章宏森
Owner 宁波宏翌能源科技有限公司
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