Method for preparing metal cladding high-temperature phase change heat storage microcapsule and heat storage microcapsule obtained by method

A technology of high-temperature phase change and metal phase change, which is applied in the field of heat storage microcapsules and the preparation of metal-shelled high-temperature phase change heat storage microcapsules, can solve the problems of single application and unrealization, and achieve good thermal cycle performance and high yield High, high production efficiency

Active Publication Date: 2019-02-12
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preparation methods have a single application and are only aimed at specific metal materials, and cannot be realized for some specific metals.

Method used

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  • Method for preparing metal cladding high-temperature phase change heat storage microcapsule and heat storage microcapsule obtained by method
  • Method for preparing metal cladding high-temperature phase change heat storage microcapsule and heat storage microcapsule obtained by method
  • Method for preparing metal cladding high-temperature phase change heat storage microcapsule and heat storage microcapsule obtained by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a metal-clad high-temperature phase-change heat storage microcapsule, the structure of which is as follows: figure 1 As shown, it includes an iron ball core 10, zirconium as the inner cladding 20, and tungsten as the outer cladding 30, and the specific preparation steps include:

[0024] S1, core preparation: select an iron ball with a diameter of 500 μm as the core. After ultrasonic cleaning with acetone, deionized water and ethanol, the iron ball core 10 is obtained by drying in a drying oven.

[0025] S2, put a certain number of iron ball cores 10 into the reaction tube of the high-temperature fluidized bed chemical vapor deposition device, use argon as the carrier gas, and raise the temperature to a set temperature of 1500°C.

[0026] S3, inner layer (zirconium layer) preparation: switch fluidization gas to argon, hydrogen and zirconium chloride (ZrCl 4 ) steam, and continue to coat for one hour to obtain the inner layer cladding 20 of zir...

Embodiment 2

[0030] This embodiment provides another metal-clad high-temperature phase-change heat storage microcapsule, the structure of which is as follows: figure 2 As shown, it includes a copper ball core 1 and a niobium cladding 2 . Concrete preparation steps include:

[0031] S1, core preparation: a copper ball with a diameter of 500 μm is selected as the core. After being ultrasonically cleaned with acetone, deionized water and ethanol, the copper ball core 1 was obtained by drying in a drying oven.

[0032] S2, put a certain number of copper ball cores 1 into the reaction tube of the high-temperature fluidized bed chemical vapor deposition device, use argon as the carrier gas, and raise the temperature to a set temperature of 850°C-1000°C.

[0033] S3, preparation of niobium layer: switch fluidization gas to argon, hydrogen and niobium chloride (NbCl 5 ) steam, and continue coating to obtain the niobium cladding 2 coated on the copper ball core 1.

[0034] S4, cooling and unload...

Embodiment 3

[0037] This embodiment provides yet another metal-shelled high-temperature phase-change heat storage microcapsule, and the specific preparation steps include:

[0038] S1, core preparation: a copper ball with a diameter of 500 μm is selected as the core. After ultrasonic cleaning with acetone, deionized water and ethanol, the copper ball core was obtained by drying in a drying oven.

[0039] S2, put a certain number of copper ball cores into the reaction tube of the high-temperature fluidized bed chemical vapor deposition device, use argon as the carrier gas, and raise the temperature to a set temperature of 400°C.

[0040] S3, preparation of tungsten layer: switch fluidization gas to argon, hydrogen and tungsten carbonyl W(CO) 6 , and continued to deposit for two hours.

[0041] S4, cooling and unloading: switch the gas of the high-temperature fluidized bed chemical vapor deposition device to argon, cool down to room temperature, and unload.

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Abstract

The invention relates to a method for preparing a metal cladding high-temperature phase change heat storage microcapsule. The method comprises the following steps of providing metal phase change material microspheres with the diameter being 20 to 2000 mu m; charging the metal phase change material microspheres into a reaction pipe of a high-temperature fluidized bed chemical vapor-phase depositiondevice; introducing inert gas so that the metal phase change material microspheres form a stable spouting state; regulating the temperature to a first cracking temperature; switching mixed gas of hydrogen gas and first metal precursors so that the first metal precursors crack under the first cracking temperature so as to form first metal, and the first metal is deposited and coated onto the outersurface of the metal phase change material microspheres to form first metal cladding microspheres; switching the inert gas and lowering the temperature to the room temperature to obtain the metal cladding high-temperature phase change heat storage microcapsule. The invention also provides the metal cladding high-temperature phase change heat storage microcapsule prepared by the method. The methodprovided by the invention has the advantages that the process is simple; the finished product rate is high; the method is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of phase-change heat storage materials, and more specifically relates to a method for preparing metal-clad high-temperature phase-change heat storage microcapsules and the heat storage microcapsules obtained therefrom. Background technique [0002] At present, there is an urgent need to develop high-temperature phase change materials above 800 °C for solar concentrating thermal power generation and industrial waste heat recovery. Both solar thermal utilization and industrial waste heat resources have the characteristics of intermittent and unsteady states, which easily cause the mismatch of energy supply and demand in time and space, and make recycling difficult. Therefore, heat storage technology has become the key to large-scale recovery and utilization of industrial waste heat and solar thermal utilization. [0003] Phase change heat storage has the advantages of high heat storage density, constant phase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 张锋林俊杨旭李子威王鹏仲亚娟朱智勇
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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