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Making method of nano thermal electric material with coaxial cable structure

A coaxial cable and thermoelectric material technology, which is applied in the manufacture/processing of thermoelectric devices, thermoelectric device node lead-out materials, thermoelectric devices, etc., can solve the problems of low thermoelectric conversion efficiency

Inactive Publication Date: 2009-09-30
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 method for preparing nanometer thermoelectric materials with coaxial cable structure, which can effectively solve the problem of low thermoelectric conversion efficiency

Method used

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  • Making method of nano thermal electric material with coaxial cable structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (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;

[0021] (2) will Bi 2 Te 3 The nanopowder is taken out, then washed with ethanol and distilled water and then dried;

[0022] (3) The washed 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.

[0023] (4) The Bi after surface treatment agent treatment 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, 1.5 g o...

Embodiment 2

[0025] (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;

[0026] (2) Sb 2 Te 3 The nanopowder is taken out, then washed with ethanol and distilled water and then dried;

[0027] (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.

[0028] (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

[0030] (1) In the 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;

[0031] (2) Sb 2 Se 3 The nanopowder is taken out, then washed with ethanol and distilled water and then dried;

[0032] (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.

[0033] (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 fe...

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Abstract

The invention relates to a nano thermoelectric material. The invention includes a linear nano inner core and a coaxially arranged outer shell, both of which adopt different thermoelectric materials. The method for preparing the nanometer thermoelectric material is as follows: adding raw materials into a reaction vessel, adding distilled water, potassium borohydride, sodium hydroxide and sodium p-dodecylbenzenesulfonate to prepare a nanometer inner core; washing the nanometer inner core, Drying, dispersing in a solvent, and performing surface treatment; adding the nano inner core into a high-pressure reaction kettle, adding raw materials, potassium borohydride and sodium hydroxide, and adding distilled water to prepare a nanometer thermoelectric material with a coaxial cable structure. The raw materials of the invention are two or more kinds of soluble salts of Bi, Sb, Zn, Pb, Co, Fe, Sn, tellurium powder and selenium powder. Compared with the thermoelectric material with traditional structure, the present invention can enhance the phonon transport, reduce the heat transfer coefficient of the thermoelectric material, improve the thermoelectric figure of merit, and thus improve the thermoelectric conversion efficiency of the material due to its unique microstructure and increased interface area.

Description

technical field [0001] The invention belongs to the technical field of semiconductor thermoelectric materials, and relates to thermoelectric materials, in particular to a method for preparing nanometer thermoelectric materials with a coaxial cable 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, precision and reliability, the thermoelectric conversion device constructed of thermoelectric materials is an ideal power supply and refrigerator, and is widely used in human, rock, petrochemic...

Claims

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Application Information

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Patent Type & Authority Patents(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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