Phase change heat storage microcapsule with frame shear wall shell structure and preparation method thereof

Abstract

The invention relates to a phase change heat storage microcapsule with a frame shear wall shell structure and a preparation method thereof. According to the technical scheme, the method comprises thesteps that aluminum-silicon alloy powder is alternately washed with acid (or alkali) and deionized water, dried in a drying box and a protective atmosphere, then placed in alkaline pressurized water vapor for pretreatment and dried to obtain dried aluminum-silicon alloy powder; and the dried aluminum-silicon alloy powder is sintered according to different heating systems and cooling systems to obtain the phase change heat storage microcapsule with a frame shear wall shell structure. The preparation method has the characteristics of low production cost, high yield, simple preparation process and easiness in industrial production, and the prepared phase change heat storage microcapsule with a frame shear wall shell structure is high in heat storage capacity, large in heat conductivity coefficient, good in thermal shock stability, good in cycle performance, high in use temperature and capable of improving the utilization rate and the utilization efficiency of heat.

Description

technical field [0001] The invention belongs to the technical field of phase change thermal storage microcapsules. Specifically, it relates to providing a phase-change thermal storage microcapsule with a frame shear wall shell structure and a preparation method thereof. Background technique [0002] High-temperature heat storage is one of the core technologies for recovering industrial waste heat, developing clean energy, and solving the mismatch between high-temperature waste heat and solar energy supply and demand. High-temperature phase-change heat storage materials are the key to the development of high-temperature heat storage technology. At present, the commonly used high-temperature phase change heat storage materials mainly include molten salts, metals or alloys. Compared with molten salts, metals and related alloys have the characteristics of large thermal conductivity, high latent heat of phase transition, stable phase transition temperature, and small volume chan...

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Problems solved by technology

Although the prepared microcapsules have high heat storage density and high thermal conductivity, the alumina shell is easy to break during the preparation process, the yield of finished products is low and the cost is high; and because of the low thermal shock stability of alumina, the thermal cycle of the produced product Insufficient stability, low service life, unable to meet long-term thermal cycle service requirements