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Preparation method and application of metal phase change microcapsule heat storage particles

A technology of metal phase change and metal particles, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of liquid phase leakage, high temperature corrosion, etc., and achieve the effect of simple preparation method, long service life and easy access

Active Publication Date: 2022-04-01
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a method for preparing metal phase change microcapsule heat storage particles, which can solve the problems of liquid phase leakage and high temperature corrosion of metal phase change materials after high temperature melting and phase transition

Method used

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  • Preparation method and application of metal phase change microcapsule heat storage particles
  • Preparation method and application of metal phase change microcapsule heat storage particles
  • Preparation method and application of metal phase change microcapsule heat storage particles

Examples

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Effect test

Embodiment 1

[0028] Fix the nylon filter on the mouth of the beaker, and heat the water in the beaker to boil. Afterwards, 2 g of metal tin particles (1 μm) were placed in the center of a filter screen (the pore size of the filter screen was smaller than the size of the metal particles). Keep boiling for 1 min. After steam treatment, it was dried, then heated to 300°C at a rate of 10°C / min in an oxygen atmosphere, kept for 1min, and then naturally cooled to room temperature.

Embodiment 2

[0030] Fix the nylon filter on the mouth of the beaker, and heat the water in the beaker to boil. Afterwards, 2 g of metallic tin particles (45 μm) were placed in the center of a filter screen (the aperture of the filter screen was smaller than the size of the metal particles). Keep boiling for 90 minutes. After steam treatment, it was dried, then heated to 400°C at a rate of 10°C / min in an oxygen atmosphere, kept for 30 minutes, and then naturally cooled to room temperature.

Embodiment 3

[0032] Fix the nylon filter on the mouth of the beaker, and heat the water in the beaker to boil. Afterwards, 2 g of metal tin particles (100 μm) were placed in the center of a filter screen (the pore size of the filter screen was smaller than the size of the metal particles). Keep boiling for 3 hours. After steam treatment, it was dried, then heated to 500°C at a rate of 10°C / min in an oxygen atmosphere, kept for 3 hours, and then naturally cooled to room temperature.

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Abstract

The invention discloses a preparation method and application of metal phase change microcapsule heat storage particles. Micron-sized metal particles are placed on a filter screen, and the filter screen is placed above a container filled with water but not in contact with the water, and heated Keep the water boiling to generate water vapor. The water vapor passes through the filter and fully contacts the surface of the metal particles, so that the metal surface and the water vapor undergo an oxidation reaction to form the corresponding metal oxide precursor shell film; Or high-temperature heat treatment in an air atmosphere to generate metal phase-change microcapsule heat storage particles coated with corresponding metal oxides, that is, core-shell structure microcapsule particles with a metal core and a metal oxide shell. The encapsulated phase-change particles prepared by the invention can effectively prevent the liquid phase leakage of the core material metal after the phase change, so that it can maintain the state of solid particles above the melting point, and isolate the core material from the air, so that its service life can be improved. More durable, simple preparation, and environmentally friendly process.

Description

technical field [0001] The invention relates to the field of heat storage and heat energy utilization, in particular to a preparation method and application of metal phase change microcapsule heat storage particles. Background technique [0002] In recent years, under the increasing energy crisis and the objective demand of national energy conservation and emission reduction, the use of phase change heat storage technology can effectively solve the problems of space and time mismatch between energy demand and supply and low energy utilization rate. Phase change heat storage technology has broad application prospects in the fields of industrial waste heat recovery, building insulation and refrigeration, and solar thermal utilization. [0003] Phase change heat storage is the use of phase change materials to absorb or release heat during the phase change process, so as to achieve the purpose of heat storage and release and regulation of energy demand and supply. Common solid-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 朱春宇盛楠饶中浩卢家辉
Owner CHINA UNIV OF MINING & TECH