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High-temperature phase-change heat storage material, heat storage brick and preparation method of heat storage brick

A heat storage material and high-temperature phase change technology, applied in the field of energy storage materials, can solve the problems such as cracks and deformation of heat storage materials, and achieve the effects of expanding the use temperature range, reducing the preparation cost, and having good adhesion.

Active Publication Date: 2020-04-14
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the heat storage materials in the prior art are prone to cracks and deformation during sintering, so as to provide a high temperature phase change heat storage material

Method used

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  • High-temperature phase-change heat storage material, heat storage brick and preparation method of heat storage brick
  • High-temperature phase-change heat storage material, heat storage brick and preparation method of heat storage brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) the fused magnesia powder and the heavy sodium carbonate with a particle diameter of 60 μm are uniformly mixed to form the first mixture;

[0029] (2) The first mixture is mixed with barium carbonate and sodium silicate to form the second mixture. The mass ratio of fused magnesium oxide powder, heavy sodium carbonate, barium carbonate and sodium silicate is 40:50:6 :0.5;

[0030] (3) Based on the mass of the second mixture, add 12% water to the second mixture, stir and knead for 10 minutes and pass through a 20-mesh sieve to form a mixture;

[0031] (4) Compress the above-mentioned kneaded material at 16Mpa for a holding time of 30s; then dry at 25°C for 4h;

[0032] (5) Sintering at 835° C. for 1 hour to obtain a high temperature phase change heat storage brick.

Embodiment 2

[0034] (1) the fused magnesia powder and the heavy sodium carbonate with a particle diameter of 60 μm are uniformly mixed to form the first mixture;

[0035] (2) The first mixture is mixed with bismuth oxide and sodium silicate to form the second mixture. The mass ratio of fused magnesium oxide powder, heavy sodium carbonate, barium carbonate and sodium silicate is 44:50:1 : 5 mix homogeneously, obtain compound;

[0036] (3) Based on the mass of the second mixture, add 10% water to the second mixture, stir and knead for 15 minutes and pass through a 20-mesh sieve to form a mixture;

[0037] (4) Compress the above-mentioned kneaded material at 16Mpa for a holding time of 30s; then dry at 50°C for 5h;

[0038] (5) Sintering at 850° C. for 1 hour to obtain a high temperature phase change heat storage brick.

Embodiment 3

[0040] (1) the fused magnesia powder and the heavy sodium carbonate with a particle diameter of 40 μm are uniformly mixed to form the first mixture;

[0041] (2) The first mixture is mixed with barium carbonate, bismuth oxide and sodium silicate to form the second mixture, and the mass ratio of fused magnesium oxide powder, heavy sodium carbonate, barium carbonate and bismuth oxide is 32:56 :3:2:2;

[0042] (3) Based on the mass of the second mixture, add 10% water to the second mixture, stir and knead for 20 minutes and pass through a 20-mesh sieve to form a mixture;

[0043] (4) Compress the above-mentioned kneaded material at 16Mpa for a holding time of 30s; then dry at 75°C for 5h;

[0044] (4) Sintering at 830° C. for 1 hour to obtain a high temperature phase change heat storage brick.

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Abstract

The invention provides a high-temperature phase-change heat storage material, a heat storage brick and a preparation method of the heat storage brick. The high-temperature phase-change heat storage material comprises a base material, a phase-change material, an adhesive and a sintering aid, and the base material comprises fused magnesium oxide. The high-temperature phase change heat storage material comprises the fused magnesium oxide. The fused magnesium oxide has relatively high surface activity and relatively low thermal expansion coefficient; the surface tension of particles in the sintering process can be reduced, so that the raw material particles can be fully contacted and fused in the sintering process, the cohesiveness among the particles is better, the sintering is facilitated, and the phenomena of serious cracking, deformation or insufficient strength cannot occur when the heat storage brick, especially a large-size heat storage brick, is prepared.

Description

technical field [0001] The invention relates to the field of energy storage materials, in particular to a high-temperature phase change heat storage material, a heat storage brick and a preparation method thereof. Background technique [0002] At present, there is a contradiction between energy supply and demand in many energy utilization systems, resulting in unreasonable energy utilization and a large amount of waste. Improving energy conversion and utilization efficiency is a major issue that countries around the world must give priority to when implementing sustainable development strategies. As a material for energy conversion and storage, energy storage materials can effectively improve energy utilization efficiency, and phase change heat storage materials can be widely used in building energy conservation, solar thermal utilization, civil heating and other fields, and are the main research areas of energy storage materials. one of the directions. Inorganic salt phase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/053C04B35/622C04B35/64C09K5/06
CPCC04B35/053C04B35/622C04B35/64C09K5/063C04B2235/442C04B2235/3201C04B2235/3215C04B2235/3427C04B2235/3298C04B2235/3296C04B2235/5436C04B2235/656C04B2235/6567
Inventor 常亮张高群邓占锋徐桂芝蔡林海杨岑玉谭晖
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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