High-temperature phase change energy storage and discharge material of rare earth ceramic and preparation method thereof

Abstract

The invention belongs to the field of phase change energy storage and discharge materials, and relates to a high-temperature phase change energy storage and discharge material of rare earth ceramic and a preparation method thereof. The phase change energy storage and discharge material comprises a phase change material and rare earth ceramic, wherein the aperture of the rare earth ceramic is 450-1000nm, and the porosity of the rare earth ceramic is greater than or equal to 50%; the phase change material is evenly embedded in the hole of the rare earth ceramic; the volume of the phase change material occupies 1 / 2-2 / 3 of the volume in the embedded hole; the phase change material is inorganic salt mixture, and a phase change temperature for the inorganic salt mixture to be changed into a liquid state from a solid state is 820-920 DEG C; the rare earth ceramic comprises the solid solution of zirconia and rare earth oxide. The adopted inorganic salt mixture is characterized in that villiaumite with high corrosion, relatively high smelting point and relatively low latent heat is compounded with other inorganic salts, a smelting point in the formed inorganic salt mixture is lowered, meanwhile, the latent heat is increased, a phase change temperature is prevented from being overhigh while energy is stored as much as possible, the villiaumite with the relatively high corrosion is subjected to gasification decomposition, and a ceramic material is corroded.

Description

technical field [0001] The invention belongs to the field of phase change energy storage and discharge materials, in particular to a rare earth ceramic high-temperature phase change energy storage and discharge material and a preparation method thereof. Background technique [0002] Phase Change Materials (Phase Change Materials), referred to as PCM. The so-called phase change energy storage refers to the material absorbing or releasing energy during the phase change process. It is this characteristic that constitutes the theoretical basis for the wide application of phase change energy storage materials. A phase change material undergoes a change in physical state when it transitions from a liquid state to a solid state. During these two phase transitions, the material absorbs heat from the environment and conversely releases heat to the environment. The energy that can be stored or released when the physical state changes is called the heat of phase change, and the tempe...

AI Technical Summary

Problems solved by technology

Organic phase change materials mainly include paraffin, fatty acids and polyols. These phase change materials are stable and non-corrosive, but their heat storage capacity is poor

Therefore, inorganic phase change materials with strong heat storage capacity are the most widely studied at present. Most inorganic phase change energy storage materials have strong heat storage capacity but are corrosive, which limits their large-scale application.

[0008] Therefore, how to effectively overcome the problem of strong corrosion of inorganic phase change materials is a technical problem that needs to be solved at present.

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