Preparation method of low-melting-point alloy phase change material

Abstract

The invention relates to a preparation method of a low-melting-point alloy phase change material, and belongs to the technical field of preparation of phase change materials. The method comprises the following steps: removing surface oxides of raw materials Ga, In and metal A, wherein the metal A is one or more of Sn, Bi, Zn and Al; adding Ga, In and metal A into a smelting medium, increasing the temperature to a preset temperature at a constant speed, conducting heat preservation for 4-6 hours, and conducting metal alloying to obtain an alloying system, wherein the smelting medium is glycerol or silicone oil; and heating the alloying system to the preset temperature, performing uniform stirring and mixing to performing full alloying, and then adding an ice-water mixture into the alloying system to quickly cool an alloy sample and obtain the low-melting-point alloy phase change material. According to the method, the glycerol or silicone oil is adopted as the smelting medium, the problems of oxidation, insufficient alloying and the like of low-melting-point alloy in the smelting process can be effectively solved, the low-melting-point alloy phase change material has greater latent heat in unit volume, the heat capacity of the low-melting-point alloy phase change material can be greatly improved, the volume proportion of the phase change material is effectively reduced, and better stability and higher heat conductivity are achieved.

Description

technical field [0001] The invention relates to a preparation method of a low-melting-point alloy phase-change material, and belongs to the technical field of phase-change material preparation. Background technique [0002] In recent years, due to the overheating of chips in the field of electronic devices, and the failure of central processing units due to the large temperature difference between day and night in the aerospace field, the problem of central processing unit failure has become more and more serious. Therefore, phase change energy storage technology is very important for the thermal management of electronic devices. Inorganic and organic compounds are two conventional phase change materials widely used to store and release latent heat, but their thermal stability is insufficient and their service life is poor due to supercooling and precipitation phenomena. Because the thermal control operation in the use process of each electronic device is intermittent, perio...

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Problems solved by technology

[0005] Aiming at the problem that the existing low-melting-point alloy phase-change materials are easily oxidized in the preparation process, the present invention proposes a preparation method of low-melting-point alloy phase-change materials, that is, glycerin or silicone oil is used as the melting medium, which can effectively solve the problem of low-melting point alloy phase-change materials. For problems such as oxidation and insufficient alloying during the smelting process, the low-melting point alloy phase change material has greater latent heat per unit volume, which can greatly increase its heat capacity and effectively reduce the volume ratio of the phase change material; at the same time, it has better stability. , Higher thermal conductivity, contributes to the rapid absorption and dissipation of heat

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