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Flexible thermal electromagnetic energy conversion film with enhanced refrigeration performance and preparation method thereof

A refrigeration performance and energy conversion technology, applied in the manufacture/processing of thermoelectric devices, thermoelectric device node lead-out materials, etc., to achieve the effect of improving refrigeration capacity, simple and controllable preparation method, and improving performance parameters

Pending Publication Date: 2021-11-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the above research results, it can be seen that the introduction of magnetic nanoparticles is an effective way to improve the thermoelectric properties of bulk thermoelectric materials, but there are large differences between bulk thermoelectric materials and flexible thermoelectric films in terms of composition, structure, and preparation methods. Whether it can be used in flexible thermoelectric films and improve their thermoelectric properties needs to be further explored and verified, and no relevant reports have been found so far

Method used

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  • Flexible thermal electromagnetic energy conversion film with enhanced refrigeration performance and preparation method thereof
  • Flexible thermal electromagnetic energy conversion film with enhanced refrigeration performance and preparation method thereof
  • Flexible thermal electromagnetic energy conversion film with enhanced refrigeration performance and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Preparation of Fe / Bi by Adding 0.2wt% Fe Magnetic Nanoparticles 0.5 Sb 1.5 Te 3 The process of thermo-electromagnetic energy conversion film is as follows:

[0025] p-type bismuth telluride (Bi 0.5 Sb 1.5 Te 3 , BST) ingots are crushed and sieved to obtain BST thermoelectric powders with a particle size of less than 120 μm. Accurately weigh 9.98g of BST powder and 0.02g of Fe magnetic nanoparticles, and add them together into a high-energy ball mill tank, then add 50g of absolute ethanol as the ball mill medium, and then pass in Ar gas for protection after vacuuming. The ball mill process parameters are: 200r / min, ball milling time 2h. After ball milling, the mixture was centrifuged and dried to obtain Fe / Bi 0.5 Sb 1.5 Te 3 Thermal electromagnetic composite powder.

[0026] Accurately weigh 0.612g bisphenol F diglycidyl ether epoxy resin, 0.521g methyl hexahydrophthalic anhydride, 0.123g 2-ethyl-4-methylimidazole, 1.8g butyl glycidyl ether, mix evenly to obtai...

Embodiment 2

[0033] Preparation of Co / Bi by Adding 0.2wt% Co Magnetic Nanoparticles 0.5 Sb 1.5 Te 3 The process of thermo-electromagnetic energy conversion film is as follows:

[0034] p-type bismuth telluride (Bi 0.5 Sb 1.5 Te 3 , BST) ingots are crushed and sieved to obtain BST thermoelectric powders with a particle size of less than 120 μm. Accurately weigh 9.98g of BST powder and 0.02g of Co magnetic nanoparticles, and add them together into the high-energy ball mill tank, then add 50g of absolute ethanol as the ball mill medium, and then pass in Ar gas for protection after vacuuming. The ball mill process parameters are: 200r / min, ball milling time 2h. After ball milling, the mixture was centrifuged and dried to obtain Co / Bi 0.5 Sb 1.5 Te 3 Thermal electromagnetic composite powder.

[0035] Accurately weigh 0.2g bisphenol F diglycidyl ether epoxy resin, 0.17g methyl hexahydrophthalic anhydride, 0.04g 2-ethyl-4-methylimidazole, 0.9g butyl glycidyl ether, mix evenly to obtain ...

Embodiment 3

[0042] Preparation of Ni / Bi by Adding 0.1wt% Ni Magnetic Nanoparticles 0.5 Sb 1.5 Te 3 The process of thermomagnetic thin film is as follows:

[0043] p-type bismuth telluride (Bi 0.5 Sb 1.5 Te 3 , BST) ingots are crushed and sieved to obtain BST thermoelectric powders with a particle size of less than 120 μm. Accurately weigh 9.98g of BST powder and 0.01g of Ni magnetic nanoparticles, and add them together to the high-energy ball mill tank, then add 50g of absolute ethanol as the ball mill medium, and then pass in Ar gas for protection after vacuuming. The ball mill process parameters are: 200r / min, ball milling time 2h. After ball milling, the mixture was centrifuged and dried to obtain Ni / Bi 0.5 Sb 1.5 Te 3 Thermal electromagnetic composite powder.

[0044] Accurately weigh 0.2g bisphenol F diglycidyl ether epoxy resin, 0.17g methyl hexahydrophthalic anhydride, 0.04g 2-ethyl-4-methylimidazole, 0.9g butyl glycidyl ether, mix evenly to obtain epoxy resin binder sol...

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Abstract

The invention relates to a flexible thermal electromagnetic energy conversion film with enhanced refrigeration performance and a preparation method thereof. The preparation method comprises the steps of firstly, ball-milling and uniformly mixing thermoelectric material powder and magnetic nanoparticles under a protective atmosphere to obtain thermal electromagnetic composite powder; then adding the thermal electromagnetic composite powder into an adhesive solution, and uniformly mixing to obtain thermal electromagnetic ink; and finally, printing a thermal electromagnetic wet film on a substrate by using the thermal electromagnetic ink, drying, and carrying out hot pressed sintering to obtain the flexible thermal electromagnetic energy conversion film. The magnetic nanoparticles are introduced into the thermoelectric film to induce a new thermal electromagnetic coupling effect, so that the film is endowed with certain magnetic performance, and the thermoelectric performance and the refrigerating capacity near the room temperature of the film are also remarkably improved. The technology provided by the invention is expected to promote the development and application of an active heat dissipation technology in an all-solid-state refrigeration surface based on thermal electromagnetic energy conversion.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a flexible thermo-electromagnetic energy conversion film with enhanced refrigeration performance and a preparation method thereof. Background technique [0002] Thermoelectric materials are new energy materials that can directly convert heat and electricity. Thermoelectric conversion devices made of thermoelectric materials can be divided into two types according to the direction of heat flow: out-of-plane thermoelectric devices and in-plane thermoelectric devices. The heat flow direction of out-of-plane thermoelectric devices is perpendicular to the substrate surface, which has the advantages of large heat absorption area and high heat utilization rate. It has been applied in the fields of automobile exhaust waste heat power generation, solar full-spectrum high-efficiency power generation, deep space power supply, and thermoelectric refrigerators. However, out-of-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/34H01L35/16H10N10/01H10N10/852
CPCH10N10/852H10N10/01
Inventor 赵文俞聂晓蕾柯少秋赵耀陈一帆孙丛立桑夏晗魏平朱婉婷贺丹琪张清杰
Owner WUHAN UNIV OF TECH
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