Large-area flexible thermoelectric refrigeration film cascade device and preparation method thereof

A technology of thermoelectric refrigeration and thermoelectric thin film, which is applied in the manufacture/processing of thermoelectric devices, thermoelectric devices, thermoelectric device junction lead-out materials, etc., and can solve problems affecting the structural accuracy of devices, deterioration of cooling performance, and widening of film edges. Achieve the effects of improving electrical transport performance, improving refrigeration performance, and reducing device internal resistance

Active Publication Date: 2021-01-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hot-press curing process will extrude the film, causing the edge of the film to widen or even stick, which seriously affects the structural accuracy of the device and leads to deterioration of the cooling performance.

Method used

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  • Large-area flexible thermoelectric refrigeration film cascade device and preparation method thereof
  • Large-area flexible thermoelectric refrigeration film cascade device and preparation method thereof
  • Large-area flexible thermoelectric refrigeration film cascade device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The structure of the large-area flexible thermoelectric refrigeration film five-stage cascaded device prepared in this example is as follows: figure 1 As shown (the black area is the thermoelectric arm, the gray area is the electrode), the overall size of the device is 68×57mm 2 , the first level is the cooling area, and the remaining four levels are cooling areas. The preparation method of the device is as follows:

[0031] p-type Bi 0.5 Sb 1.5 Te 3 The ingot is smashed, ground, and passed through a 120-mesh sieve to obtain a ready-to-use powder with a particle size of less than 120 μm;

[0032] According to the calculated mass percentage, weigh the above Bi 0.5 Sb 1.5 Te 3 Add 9.9g of powder and 0.1g of graphene to a high-energy ball mill tank (ball-to-material ratio 55:1) and then add 50mL of absolute ethanol as the ball milling medium. After sealing, vacuumize and flush into Ar gas protection to start ball milling. Ball milling process parameters: ball milli...

Embodiment 2

[0040] The structural schematic diagram and physical photos of the large-area flexible thermoelectric cooling film five-stage cascaded device prepared in this example are as follows Figure 1-2 As shown, the device preparation method is as follows:

[0041] p-type Bi 0.5 Sb 1.5 Te 3 The ingot is smashed, ground, and passed through a 120-mesh sieve to obtain a ready-to-use powder with a particle size of less than 120 μm;

[0042] According to the calculated mass percentage, weigh the above Bi 0.5 Sb 1.5 Te 3 Add 9.9g of powder and 0.1g of graphene to a high-energy ball mill tank (ball-to-material ratio 55:1) and then add 50mL of absolute ethanol as the ball milling medium. After sealing, vacuumize and flush into Ar gas protection to start ball milling. Ball milling process parameters: ball milling speed 200r / min, ball milling 2h;

[0043] The ball-milled powder was centrifuged at a speed of 4000r / min for 10 minutes, the lower layer of slurry was removed and placed in a v...

Embodiment 3

[0050] The structure of the large-area flexible thermoelectric refrigeration film five-stage cascaded device prepared in this example is as follows: figure 1 Shown, concrete preparation method is as follows:

[0051] p-type Bi 0.5 Sb 1.5 Te 3 The ingot is smashed, ground, and passed through a 120-mesh sieve to obtain a ready-to-use powder with a particle size of less than 120 μm;

[0052] According to the calculated mass percentage, weigh the above Bi 0.5 Sb 1.5 Te 3 Add 9.9g of powder and 0.1g of graphene to a high-energy ball mill tank (ball-to-material ratio 55:1) and then add 50mL of absolute ethanol as the ball milling medium. After sealing, vacuumize and flush into Ar gas protection to start ball milling. Ball milling process parameters: ball milling speed 200r / min, ball milling 2h;

[0053] The ball-milled powder was centrifuged at a speed of 4000r / min for 10min, the lower layer of slurry was removed and placed in a vacuum drying oven, heated to 60°C and vacuum-d...

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Abstract

The invention relates to a large-area flexible thermoelectric refrigeration film cascade device and a preparation method thereof. The method comprises the steps of firstly preparing thermoelectric slurry from a thermoelectric material, polymer resin, a solvent and other raw materials, carrying out the silk-screen printing of the thermoelectric slurry on the surface of a flexible substrate, and carrying out the hot-pressing sintering; and then preparing a thermoelectric arm and an electrode on the surface of an obtained thermoelectric film by adopting a laser etching method and a vacuum coatingmethod in sequence, and finally obtaining the device with excellent performance. The method has the advantages of simple process, high processing speed, less material waste, high manufacturing precision and the like, and the prepared large-area flexible thermoelectric refrigeration film cascade device is good in refrigeration performance, can effectively reduce the temperature of a heat source, and is expected to be applied to the fields of efficient heat dissipation, bidirectional accurate temperature control, heat-sensitive sensors and the like of electronic devices.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a large-area flexible thermoelectric cooling film cascade device and a preparation method thereof. Background technique [0002] With the rapid development of microelectronics integration technology, the performance of the processor is getting higher and higher, and the size is getting smaller and smaller. At the same time, the heat generation of the processor is also increasing. It is urgent to develop an efficient thermal management solution. Thermoelectric material is a new energy material that can realize mutual conversion of heat energy and electric energy. The thermoelectric device made of thermoelectric material has the advantages of small size, high reliability, rapid response, no pollution, no noise and no moving parts. It has been applied It is used in deep space power supply, automobile exhaust power generation, small temperature difference power generatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/34H01L35/32H01L35/16
CPCH10N10/852H10N19/101H10N10/01Y02B30/00
Inventor 赵文俞聂晓蕾曹方明魏平桑夏晗朱婉婷张清杰
Owner WUHAN UNIV OF TECH
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