Bone-like hierarchical pore ceramic-based photo-thermal storage material and preparation method thereof

A technology for storing materials and graded pores, applied in ceramic products, materials for heat exchange, chemical instruments and methods, etc., can solve the problems of reduced heat transfer efficiency, low final efficiency, heat loss, etc., to improve the spectral absorption rate, spectral The effect of improving the absorption rate and improving the thermal conductivity

Active Publication Date: 2021-03-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When solar energy is used as the heat source, the surface temperature of the commonly used surface heat storage system is high, and there are many internal heat transfer links. The thermal resistance is too large, resulting in too slow heat transfer and unable to transfer the surface heat to the heat storage material in time, causing most of the heat to be lost. Ultimate inefficiency
[0006] During the solid-liquid conversion of inorganic salts, there is a leakage problem. For this reason, packaging can be used to prevent the leakage of inorganic salts, but the thermal resistance between the heat transfer medium and the phase change material is increased, and the heat transfer efficiency is reduced.

Method used

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  • Bone-like hierarchical pore ceramic-based photo-thermal storage material and preparation method thereof
  • Bone-like hierarchical pore ceramic-based photo-thermal storage material and preparation method thereof
  • Bone-like hierarchical pore ceramic-based photo-thermal storage material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Take 1μm aluminum nitride powder, yttrium oxide, and absolute ethanol with a mass ratio of 100:3:75, respectively 35g, 1.05g, and 26.25g, and place them in a ball mill at a speed of 270rpm, and ball mill for half an hour; then add 0.2wt % ethanol dispersant polyacrylic acid, continue to ball mill at 270rpm for half an hour; then add 1wt% polyurethane and mill at 270rpm for half an hour; finally add tetraethylenepentamine and mechanically stir to make it react with polyurethane to form a water-resistant film wrapped in on aluminum nitride powder.

[0048]Then put it into an oven and dry it to make a hydration-resistant aluminum nitride powder. Take the treated aluminum nitride powder and water with a mass ratio of 73%, and weigh 0.3wt% of Ib-104 (as a gelling agent, dispersant) to mix with it and place it in a ball mill to mill half of it at 270rpm Hour.

[0049] Take out the ball-milled slurry, weigh 0.65wt% foaming agent (triethanolamine lauryl sulfate) of the taken ...

Embodiment 2

[0054] Take 2μm aluminum nitride powder, yttrium oxide, and absolute ethanol with a mass ratio of 100:3:75, respectively 35g, 1.05g, and 26.25g, and place them in a ball mill at a speed of 270rpm, and ball mill for half an hour; then add 0.2wt % ethanol dispersant polyacrylic acid, continue ball milling at 270rpm for half an hour; then add 1wt% polyurethane and mill at 270rpm for half an hour.

[0055] Finally, tetraethylenepentamine is added for mechanical stirring to make it react with polyurethane to form a water-resistant film wrapped on the aluminum nitride powder. Then put it into an oven and dry it to make a hydration-resistant aluminum nitride powder. Take the treated aluminum nitride powder and water with a mass ratio of 73%, and weigh 0.3wt% of Ib-104 (as a gelling agent, dispersant) to mix with it and place it in a ball mill to mill half of it at 270rpm Hour. Take out the ball-milled slurry, weigh 0.65wt% foaming agent (triethanolamine lauryl sulfate) of the taken...

Embodiment 3

[0058] Take 1μm silicon carbide powder, yttrium oxide, and absolute ethanol with a mass ratio of 100:3:75, respectively 35g, 1.05g, and 26.25g, and place them in a ball mill at a speed of 270rpm, and weigh the silicon carbide with a mass ratio of 70%. Powder and water, and weigh 0.3wt% of Ib-104 (as a gelling agent, dispersant) and mix it in a ball mill at 270rpm for half an hour. Take out the ball-milled slurry, weigh 0.65wt% foaming agent (triethanolamine lauryl sulfate) of the taken out slurry, pour it into the slurry, and mechanically stir at 700rpm to foam for half an hour. Pour the porous slurry after foaming into the mold, take it out from the mold after it is formed, dry it naturally for two days, place it in the air atmosphere of a muffle furnace and heat it to 650°C at a heating rate of 1°C / min. -104 all removed. Afterwards, the skeleton green body is placed in a nitrogen atmosphere of a hot-press furnace and heated to 1950°C for sintering for 4 hours to obtain a hi...

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Abstract

The invention discloses a bone-like hierarchical pore ceramic-based photo-thermal storage material and a preparation method thereof. An aluminum nitride hierarchical pore structure is prepared by adopting a foaming method by imitating a human bone structure, a layer of titanium nitride is loaded on the aluminum nitride framework, and finally, inorganic salt is soaked into the aluminum nitride-titanium nitride framework by a vacuum soaking method to prepare the hierarchical pore aluminum nitride ceramic-based photo-thermal storage material. The aluminum nitride grade pore structure in the composite material forms a continuous heat conduction channel, so that the overall heat conductivity is greatly improved and can reach 27W / m.K, and the problem of low heat storage / release rate caused by low heat conductivity of the phase change material is greatly improved. The loaded titanium nitride enables the composite material to directly take the sun as a heat source, the aluminum nitride framework conducts heat quickly, inorganic salt stores heat, and the composite material is a novel composite photo-thermal storage material integrating absorption, transmission and heat storage.

Description

technical field [0001] The present invention relates to the technical field of producing energy storage materials by chemical and chemical methods and the scientific and technical field of energy materials. Specifically, the present invention relates to a bone-like level hole ceramic-based photothermal storage material and its preparation method. Background technique [0002] As the support of economic development, energy is continuously consumed with the progress of society, so it is particularly important to find alternative new energy sources. Solar energy is an important source of earth resources, and its supply is durable, clean and safe, and its storage capacity is abundant. Its development and application have attracted the favor of many researchers. However, the energy density and radiation intensity of solar radiation are subject to great instability and intermittency due to the limitation of natural conditions such as seasons, day and night, and cloudy weather. , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/582C04B35/575C04B35/577C04B35/5835C04B35/14C04B35/622C04B35/628C04B35/638C04B35/645C04B38/10C04B41/89C09K5/06
CPCC04B35/581C04B35/575C04B35/583C04B35/14C04B35/622C04B35/62802C04B35/638C04B35/645C04B38/10C04B41/89C04B41/52C09K5/063C04B2235/5436C04B2235/658C04B2235/6567C04B2235/6562C04B2235/9607C04B2235/9669C04B2235/3225C04B41/5068C04B41/4539C04B41/5009C04B41/5012C04B41/501C04B41/522
Inventor 刘向雷王浩蕾宣益民
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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