A phase-change heat storage material and a preparing method thereof

A technology of phase-change heat storage materials and mixtures, which is applied in the field of new energy and energy-saving materials, can solve the problems that the performance expectations of inorganic salt phase-change heat storage materials cannot be met, and achieve stable overall shape, high heat storage density, shape retention effect

Active Publication Date: 2017-11-10
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But even so, the thermal conductivity of the above-mentioned composite heat storage material is only 3-4.1W / (m K), and its heat storage density is only 380-550kJ / kg, so it still cannot achieve the phase transition of inorganic salts in this field. Performance Expectations of Thermal Storage Materials

Method used

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  • A phase-change heat storage material and a preparing method thereof

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Embodiment 1

[0031] This embodiment provides a phase change heat storage material, which includes the following raw materials:

[0032] Sodium carbonate 25g, lithium carbonate 30g and magnesium oxide 30g.

[0033] A method for preparing a phase change heat storage material, comprising the steps of:

[0034] (1) sodium carbonate, lithium carbonate and magnesium oxide are dried at 90°C;

[0035] (2) Use a ball mill to crush sodium carbonate and lithium carbonate to a particle size of 3 μm, mix evenly, use a ball mill to crush magnesium oxide to a particle size of 10 μm, and mix the mixture of magnesium oxide, sodium carbonate and lithium carbonate at a pressure of 15Mpa Next, press for 60s to form;

[0036] (3) Sintering at 750° C. for 0.5 h to obtain a phase change heat storage material.

Embodiment 2

[0038] This embodiment provides a phase change heat storage material, which includes the following raw materials:

[0039] Sodium carbonate 22g, barium carbonate 20g and magnesium oxide 48g.

[0040] A method for preparing a phase change heat storage material, comprising the steps of:

[0041] (1) drying sodium carbonate, barium carbonate and magnesium oxide at 130°C;

[0042] (2) Use a ball mill to crush sodium carbonate and barium carbonate to a particle size of 5 μm, mix evenly, use a ball mill to crush magnesium oxide to a particle size of 5 μm, and mix the mixture of magnesium oxide, sodium carbonate and barium carbonate at a pressure of 20 MPa Next, press for 50s to form;

[0043] (3) Sintering at 750° C. for 1 hour to obtain a phase change heat storage material.

Embodiment 3

[0045] This embodiment provides a phase change heat storage material, which includes the following raw materials:

[0046] 65g of carbonate, 48g of magnesium oxide and 3g of kaolin; wherein the carbonate includes potassium carbonate and sodium carbonate with a mass ratio of 50:50.

[0047] A method for preparing a phase change heat storage material, comprising the steps of:

[0048] (1) drying sodium carbonate, potassium carbonate and magnesium oxide at 100°C;

[0049] (2) Sodium carbonate and potassium carbonate were pulverized to a particle size of 2 μm by a ball mill, and ground and mixed to form eutectics, and magnesium oxide was pulverized to a particle size of 7 μm by a ball mill, and the co-crystal of magnesium oxide and kaolin with sodium carbonate and potassium carbonate was The crystals are mixed and pressed for 50 seconds under a pressure of 30Mpa;

[0050](3) Sintering at 730° C. for 2 hours to obtain a phase change heat storage material.

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Abstract

A phase-change heat storage material is provided. The phase-change heat storage material includes carbonate and a ceramic matrix. The granularity of the carbonate is 2-10 [mu]m, and the granularity of the ceramic matrix is 1-10 [mu]m. The phase-change heat storage material has a high heat storage density and high thermal conductivity, the heat storage density of the material can be 700 kJ/kg or above, and the thermal conductivity of the material can be 4.5 w/m.k or above. The number of times of cyclic use of the material is greatly increased and can be 19000 or above.

Description

technical field [0001] The invention relates to a heat storage material, which belongs to the field of new energy and energy-saving materials. Background technique [0002] With the rapid development of global industry and the continuous reduction of fossil fuels, energy shortage and environmental pollution have become common challenges faced by all countries in the world. Therefore, how to improve energy efficiency has become an important issue facing mankind. [0003] Energy storage materials are one of the important means to improve energy utilization. Phase change thermal storage materials are a mainstream research direction of energy storage materials, which are widely used in spacecraft thermal control, building energy conservation, solar thermal utilization, chip cooling and other fields. Inorganic salt phase change heat storage materials are currently the most widely used phase change heat storage materials due to their advantages such as wide temperature range, easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/04C04B35/63C04B35/634C04B35/636
CPCC04B35/04C04B35/6303C04B35/63416C04B35/636C04B35/6365C04B2235/3201C04B2235/3203C04B2235/3215C04B2235/3826C04B2235/425C04B2235/5436C04B2235/9607
Inventor 邓占锋徐桂芝赵波杨岑玉金翼杜兆龙宋鹏翔冷光辉胡晓蒋招梧
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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