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Thermoelectric material and preparation method thereof

A technology of thermoelectric materials and composite materials, applied in the fields of thermoelectric device junction lead-out materials, thermoelectric device manufacturing/processing, nanotechnology for materials and surface science, etc., can solve the problems of low voltage and weak thermoelectric effect, etc. To achieve the effect of easy regulation, increase the thermoelectric coefficient, and increase the Seebeck coefficient

Inactive Publication Date: 2018-09-18
长沙大衡智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current thermoelectric materials generally have the problems of weak thermoelectric effect and low voltage, which limit their application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add 4,4'-diaminodiphenyl ether and pyromellitic dianhydride to 2000 ml of DMAC at a molar ratio of 1:1, with a solid content of 13%, and stir and react at 20 degrees Celsius for 6 hours to obtain Viscous polyamic acid solution mixture, viscosity 8400cp.

[0031] (2) Under the conditions of 20 degrees Celsius and 60% relative humidity, the mixture is vacuum degassed for 1 hour, the mixture is coated on stainless steel, and then placed in an aqueous solution of ethanol (45% ethanol by volume), soaked for 10 minutes, and then Dry at 60 degrees centigrade for 10 minutes, then transfer to a furnace with a temperature increase of 5 degrees centigrade per minute, raise the temperature to 320 degrees centigrade, and keep the temperature for 60 minutes to obtain a polyimide porous membrane.

[0032] The average pore diameter of the porous membrane measured by mercury intrusion porosimetry was 67 nanometers, and the porosity was 38%. The thickness of the film was measured to...

Embodiment 2

[0037] (1) Add 4,4'-diaminodiphenyl ether and pyromellitic dianhydride to 2000 ml of DMAC at a molar ratio of 1:1, with a solid content of 19%, and stir and react at 20 degrees Celsius for 6 hours to obtain Viscous polyamic acid solution mixture, viscosity 2400cp.

[0038] (2) Under the conditions of 20 degrees Celsius and 50% relative humidity, the mixture is vacuum degassed for 1 hour, the mixture is coated on stainless steel, and then placed in an aqueous solution of ethanol (ethanol volume content 60%), soaked for 20 minutes, and then Dry at 80 degrees centigrade for 10 minutes, then transfer to a furnace with a temperature increase of 5 degrees centigrade per minute, raise the temperature to 300 degrees centigrade, and keep the temperature for 30 minutes to obtain a polyimide porous membrane.

[0039] The average pore diameter of the porous membrane measured by mercury intrusion porosimetry was 66 nanometers, and the porosity was 31%. The thickness of the film was measur...

Embodiment 3

[0044] (1) Add 4,4'-diaminodiphenyl ether and pyromellitic dianhydride to 3000 ml of DMAC at a molar ratio of 1:1, with a solid content of 8%, and stir and react at 20 degrees Celsius for 6 hours to obtain Viscous polyamic acid solution mixture, viscosity 6550cp.

[0045] (2) At 20 degrees Celsius, vacuum degas the mixture for 1 hour, and apply the mixture to stainless steel at a relative humidity of 50%, then place it in an aqueous solution of ethanol (45% ethanol by volume), soak for 20 Minutes, then dried at 60 degrees Celsius for 10 minutes, then transferred to a furnace with a temperature increase of 5 degrees Celsius per minute, raised the temperature to 300 degrees Celsius, and kept the temperature for 30 minutes to obtain a polyimide porous membrane.

[0046]The average pore diameter of the porous membrane measured by mercury intrusion porosimetry was 76 nanometers, and the porosity was 47%. The thickness of the film was measured to be 6 microns with a thickness gauge...

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Abstract

The invention discloses a thermoelectric material and a preparation method thereof and particularly relates to a polyimide porous film / Sn2Te3-xFex thermoelectric film composite material and a preparation method thereof. The method is advantaged in that the nano-level thermoelectric material is prepared through magnetron sputtering and is embedded in a porous film, the thermoelectric material can reach the nanometer scale, and the thermoelectric coefficient is high.

Description

technical field [0001] The invention relates to the field of thermoelectric materials, in particular to a nanoscale thermoelectric composite material and a manufacturing process thereof. Background technique [0002] The thermoelectric effect means that when the temperature at both ends of the object is different, the carriers in the object will diffuse from the high-temperature region to the low-temperature region along the temperature gradient, so that the number of carriers in the low-temperature region is gradually greater than that in the high-temperature region, thereby generating a potential difference and establishing a thermoelectric effect. built-in electric field. A thermoelectric material is a material that converts a temperature difference into a potential difference, thereby turning the temperature difference into a resource. Therefore, people have available power sources anytime, anywhere. Compared with traditional power generation and refrigeration equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/24H01L35/16H01L35/34B82Y30/00C08G73/10C08J5/18C08L79/08H10N10/856H10N10/01H10N10/852
CPCB82Y30/00C08G73/1007C08G73/1071C08J5/18C08J2379/08H10N10/856H10N10/852H10N10/01
Inventor 不公告发明人
Owner 长沙大衡智能科技有限公司
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