Process for preparing organic salt/ceramic base high temperature phase-changing energy-storing material

A preparation process, high-temperature phase change technology, applied in the direction of heat exchange materials, sustainable manufacturing/processing, chemical industry, etc., can solve the problem of affecting the appearance of material compactness and mechanical strength, low mechanical strength of composite energy storage materials, mechanical strength decrease and other problems, to achieve the effects of large latent heat of phase change, improved heat storage performance, and improved heat transfer performance

Inactive Publication Date: 2006-07-19
GUANGDONG UNIV OF TECH
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Problems solved by technology

The currently known preparation method of this kind of material mainly adopts the hybrid sintering method, but there are the following problems: First, the contradiction between the sintering temperature and the content of the inorganic salt of the phase change latent heat material in the composite material, because the heat storage performance of the phase change composite material mainly depends on The higher the content, the better the heat storage performance. However, the sintering temperature of the ceramic substrate is much higher than the melting point of the inorganic salt, and the evaporation of the molten salt is inevitable; secondly, it is precisely because the sintering temperature and T

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  • Process for preparing organic salt/ceramic base high temperature phase-changing energy-storing material

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[0015] 1. Implementation conditions

[0016] The silica powder passes through the 180-mesh standard inspection sieve, the pore-forming agent starch and the high-temperature binder bentonite pass through the 325-mesh standard inspection sieve, and the ratio is: 80% silicon dioxide, 15% pore-forming agent, and high-temperature binder 5%, add an appropriate amount of forming agent water glass solution, mix the ingredients evenly through repeated stirring and sieving, and form a short cylinder with a diameter of about 30mm and a h of about 25mm on a hydraulic universal material testing machine, and the molding pressure is 15Mpa; The pressed samples were dried in an electric blast drying oven at 200°C for 2 hours, and fired in a resistance furnace at a firing temperature of 1250°C; the porous ceramic preform was obtained after being slowly cooled in the furnace. Then use the prepared porous ceramic preform and inorganic salt sodium sulfate to impregnate and synthesize. The synthesi...

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Abstract

The disclosed preparation technique for inorganic salt/ceramic-base high-temperature phase- change energy-storage material comprises: first, preparing the porous ceramic precast body with three-dimensional connected ultrastructure; heating the phase-change potential heat heat-storage inorganic slat material to full fusion in normal-pressure resistance furnace, dipping the precast body rapidly into the fused material; finally, cooling to room temperature, taking surface desalination treatment. Wherein, as the well wettability and capillary tension effect, the inorganic salt will unprompted infiltrate into the precast body. This invention simplifies process, and improves heat exchange efficiency greatly.

Description

technical field [0001] The invention relates to the field of energy material science, in particular to a preparation process of an inorganic salt / ceramic-based high-temperature phase-change energy storage material. Background technique [0002] Heat storage material is a new type of functional material that is widely used at present. Using it can solve the contradiction between energy supply and demand time and space. Heat storage material is mainly used in solar thermal utilization, industrial waste heat recovery, building energy conservation and other fields. There are two main known heat storage materials: sensible heat storage materials and phase change (latent heat) heat storage materials. Among them, sensible heat storage materials are easy to obtain, safe, and cheap, but the heat storage density is small and the use temperature cannot be constant; phase change (latent heat) heat storage materials mainly include inorganic salts, inorganic hydrated salts, metals and all...

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Application Information

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IPC IPC(8): C09K5/02
CPCY02P20/10
Inventor 黄金张仁元柯秀芳
Owner GUANGDONG UNIV OF TECH
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