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High-temperature phase-change heat storage composite material and preparation method thereof

A composite material and high-temperature phase change technology, applied in heat exchange materials, chemical instruments and methods, metal processing equipment, etc., can solve the problems of low heat storage density at high temperature, low phase change temperature of microcapsules, and inability to meet high-temperature industries , to achieve the effects of high phase transition temperature, high heat storage density and high utilization efficiency

Active Publication Date: 2021-04-02
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microcapsules prepared by this method have low phase transition temperature and low heat storage density at high temperature, which cannot meet the requirements of high temperature industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A high temperature phase change thermal storage composite material and a preparation method thereof. The preparation method described in this embodiment is:

[0044] Step 1. Alternately wash the ternary aluminum-based alloy powder with acid solution and deionized water for 5 times, then place the washed ternary aluminum-based alloy powder in a protective atmosphere, and dry at 80°C for 8 hours to obtain the surface Modified ternary aluminum-based alloy powder.

[0045] Step 2, placing the surface-modified ternary aluminum-based alloy powder in pressurized water vapor for 60 minutes to obtain pretreated ternary aluminum-based alloy powder.

[0046] Step 3. Place the pretreated ternary aluminum-based alloy powder in aluminum sol, vacuum impregnate for 5 minutes, take it out and filter it; then place it in silica sol, vacuum immerse it for 10 minutes, take it out after filtering, and complete an alternate impregnation; The one-time alternate impregnation method was repea...

Embodiment 2

[0055] A high temperature phase change thermal storage composite material and a preparation method thereof. The preparation method described in this embodiment is:

[0056] Step 1. Alternately wash the ternary aluminum-based alloy powder with acid solution and deionized water for 7 times, then place the washed ternary aluminum-based alloy powder in a protective atmosphere, and dry at 90°C for 6 hours to obtain the surface Modified ternary aluminum-based alloy powder.

[0057] Step 2, placing the surface-modified ternary aluminum-based alloy powder in pressurized water vapor for 70 minutes to obtain pretreated ternary aluminum-based alloy powder.

[0058] Step 3. Place the pretreated ternary aluminum-based alloy powder in aluminum sol, vacuum impregnate for 6 minutes, take it out and filter it; then place it in silica sol, vacuum immerse it for 14 minutes, take it out after filtering, and complete an alternate impregnation; The one-time alternate impregnation method is repeat...

Embodiment 3

[0067] A high temperature phase change thermal storage composite material and a preparation method thereof. The preparation method described in this embodiment is:

[0068] Step 1. Alternately wash the ternary aluminum-based alloy powder with acid solution and deionized water for 9 times, then place the washed ternary aluminum-based alloy powder in a protective atmosphere, and dry it at 100°C for 10 hours to obtain the surface Modified ternary aluminum-based alloy powder.

[0069] Step 2, placing the surface-modified ternary aluminum-based alloy powder in pressurized water vapor for 80 minutes to obtain pretreated ternary aluminum-based alloy powder.

[0070] Step 3: Place the pretreated ternary aluminum-based alloy powder in aluminum sol, vacuum impregnate for 8 minutes, take it out and filter it; then place it in silica sol, vacuum immerse it for 22 minutes, take it out after filtering, and complete an alternate impregnation; The one-time alternate impregnation method is r...

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Abstract

The invention relates to a high-temperature phase-change heat storage composite material and a preparation method thereof. According to the technical scheme, the method comprises the steps that ternary aluminum-based alloy powder is alternately washed with an acid solution and deionized water, dried in a protective atmosphere and placed in pressurized steam to be pretreated, and the pretreated ternary aluminum-based alloy powder is obtained; the pretreated ternary aluminum-based alloy powder is put into aluminum sol for vacuum impregnation, taken out, filtered, put into silica sol for vacuum impregnation, filtered, and taken out; the steps are repeated for 3-5 times according to an alternate impregnation method, and filtering and drying are performed to obtain the pre-coated ternary aluminum-based alloy powder; and the pre-coated ternary aluminum-based alloy powder is put into a high-temperature furnace, fired at 1100-1400 DEG C under an air atmosphere condition, and cooled to obtain the high-temperature phase-change heat storage composite material. The preparation method is simple in process, low in cost and easy for industrial production, and the prepared high-temperature phase-change heat storage composite material is high in shell strength, high in phase-change temperature, high in heat storage density, high in heat utilization rate and high in utilization efficiency, and is suitable for solar power generation, high-temperature industry and the like.

Description

technical field [0001] The invention belongs to the technical field of high temperature phase change storage materials. In particular, it relates to a high-temperature phase change thermal storage composite material and a preparation method thereof. Background technique [0002] Heat storage technology is a kind of energy storage technology that uses heat storage materials to store temporarily unnecessary heat, and then releases heat when heat is needed. Heat storage technology solves the time difference between heat supply and demand, improves the utilization of heat, and can be used for peak load shifting and valley filling, solar energy storage, industrial waste heat recovery, etc., so as to achieve the purpose of developing new energy and saving old energy . [0003] The core issue of thermal storage technology is the preparation and application of thermal storage materials, among which phase change thermal storage materials have become thermal storage materials with g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F1/02C22C21/02C09K5/06
CPCB22F1/0003C22C21/02C09K5/063B22F1/145B22F1/16Y02E60/14
Inventor 张美杰张吉祥顾华志黄奥付绿平栗海峰
Owner WUHAN UNIV OF SCI & TECH
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