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Nano thermal electric material with coaxial cable structure and its making method

A technology of thermoelectric materials and coaxial cables, applied in thermoelectric device node lead-out materials, thermoelectric device manufacturing/processing, thermoelectric devices, etc., can solve problems such as low thermoelectric conversion efficiency

Inactive Publication Date: 2008-08-06
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a thermoelectric material with a new structure, which can effectively solve the problem of low thermoelectric conversion efficiency, and at the same time provide a preparation method for the thermoelectric material with this structure

Method used

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  • Nano thermal electric material with coaxial cable structure and its making method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) In a reaction vessel, add 0.1 g of tellurium powder, 0.12 g of bismuth chloride, 200 ml of distilled water, 0.5 g of sodium p-dodecylbenzenesulfonate, 1.5 g of sodium hydroxide, and 1 g of sodium borohydride. Stir and control the temperature of the reactor at 50°C and keep it warm for 48h to obtain Bi 2 Te 3 Nano core material;

[0023] 2) Set Bi 2 Te 3 The nanopowder is taken out, then washed with ethanol and distilled water and then dried;

[0024] 3) Wash the Bi 2 Te 3 Put the nanopowder into a 200ml beaker, add 100ml of water, and stir with a magnetic force. Then add 0.1 g of surface treatment reagent mercaptoacetic acid, and stir for 5 hours at room temperature for surface treatment.

[0025] 4) The Bi which has been treated with the surface treatment agent 2 Te 3 The nano-powders were washed and dried with ethanol and distilled water respectively, and then added to the autoclave, followed by adding 0.1 g of tellurium powder, 0.12 g of antimony chloride...

Embodiment 2

[0027] 1) In a reaction vessel, add 0.1 g of tellurium powder, 0.12 g of antimony chloride, 200 ml of distilled water, 0.5 g of sodium p-dodecylbenzenesulfonate, 1.5 g of sodium hydroxide, and 1 g of sodium borohydride. Stir and control the temperature of the reactor at 100°C, keep it warm for 12h, and obtain Sb 2 Te 3 Nano core material;

[0028] 2) Add Sb 2 Te 3 The nanopowder is taken out, then washed with ethanol and distilled water and then dried;

[0029] 3) The washed Sb 2 Te 3 Put the nanometer powder into a 200ml beaker, add 100ml of ethanol, and stir with a magnetic force. Then add 20 grams of surface treatment reagent mercaptopropionic acid, and stir for 5 hours at room temperature for surface treatment.

[0030] 4) Sb treated with surface treatment agent 2 Te 3 The nano-powders were washed and dried with ethanol and distilled water respectively, and then added to the high-pressure reaction kettle, followed by adding 0.1 g of tellurium powder, 0.12 g of bis...

Embodiment 3

[0032] 1) In a reaction vessel, add 0.1 g of selenium powder, 0.12 g of antimony nitrate, 200 ml of distilled water, 0.5 g of sodium p-dodecylbenzenesulfonate, 1.5 g of sodium hydroxide, and 1 g of sodium borohydride. Stir and control the temperature of the reactor at 80°C, keep it warm for 18h, and obtain Sb 2 Se 3 Nano core material;

[0033] 2) Add Sb 2 Se 3 The nanopowder is taken out, then washed with ethanol and distilled water and then dried;

[0034] 3) The washed Sb 2 Se 3 Put the nanopowder into a 200ml beaker, add 100ml of water, and stir with a magnetic force. Then add 10 grams of surface treatment reagent bismercaptooxalic acid, and stir for 5 hours at room temperature for surface treatment.

[0035] 4) Sb treated with surface treatment agent 2 Se 3 The nano-powders were washed and dried with ethanol and distilled water respectively, and then added into the autoclave, followed by adding 0.1 g of tellurium powder, 0.06 g of bismuth chloride, 0.06 g of ferr...

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Abstract

The invention relates to nano thermoelectric material and comprises a linear inner nano core and an outer sleeve arranged coaxially with the linear inner nano core. Different thermoelectric materials are adopted on the linear inner nano core and the outer sleeve. The method for preparing the structure comprises the steps of: adding raw materials in a reaction vessel, adding distilled water, potassium borohydride and sodium hydroxide and sodium dodecyl benzene sulfonate to prepare the inner nano-core; washing, drying and dispersing the inner nano-core in solvent for surface treatment; putting the inner nano core in a high pressure reaction vessel and then adding raw materials, potassium borohydride, sodium hydroxide and distilled water to prepare an coaxial cable structured nano thermoelectric material. The raw materials are two or more of soluble salt, Tellurium powder and Selenium Powder of Bi, Sb, Zn, Pb, Co, Fe and Sn. Compared with the thermoelectric material with the prior structure and owning to the unique microstructure, the nano thermoelectric material can enhance the phonon transmission, reduce the heat transfer coefficient and improve the thermoelectric figure of merit so as to improve the thermoelectric conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of semiconductor thermoelectric materials, and relates to thermoelectric materials, in particular to a nanometer thermoelectric material with a coaxial cable structure and a preparation method for the thermoelectric material with the structure. Background technique [0002] Thermoelectric materials are functional materials that use the movement of carriers inside a solid to achieve direct mutual conversion of thermal energy and electrical energy. That is, the Seebeck effect is used to directly convert thermal energy into electrical energy. On the contrary, the Peltier effect is used to transfer heat from the low-temperature end to the high-temperature end to achieve refrigeration. Due to the excellent performance of no transmission parts, no noise operation, no pollution, accurate and reliable, etc., thermoelectric conversion devices constructed of thermoelectric materials are ideal power supplies and refrige...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/00H01L35/14H01L35/16H01L35/18H01L35/34H10N10/00H10N10/01H10N10/851H10N10/852H10N10/853
Inventor 袁求理聂秋林殷好勇
Owner HANGZHOU DIANZI UNIV
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