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A making method for nano thermal electric material with nucleus shell structure

A technology of thermoelectric materials and core-shell structure, which is applied in the manufacture/processing of thermoelectric devices, and can solve problems such as poor combination of core and shell

Inactive Publication Date: 2009-09-30
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of nano-thermoelectric materials with core-shell structure has always been difficult to combine the core and the shell.

Method used

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  • A making method for nano thermal electric material with nucleus shell structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) In a reaction vessel, add 0.1 g of tellurium powder, 0.12 g of bismuth chloride, 200 ml of distilled water, 5 g of polyethylene glycol, 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 Spherical nanocore.

[0022] (2) will Bi 2 Te 3 The spherical nano-core powder is taken out, washed with ethanol and distilled water respectively, and dried.

[0023] (3) The washed Bi 2 Te 3 Put the spherical nano-core powder into a 200 ml beaker, add 100 ml of water, and stir with magnetic force. Then add 0.1 g of surface treatment reagent mercaptoacetic acid, and stir for 5 hours at room temperature for surface treatment.

[0024] (4) The Bi after surface treatment agent treatment 2 Te 3 The spherical nano-core powder was washed and dried with ethanol and distilled water, respectively, and then added to a high-pressure reactor, followed by adding 0.1 g of tellurium...

Embodiment 2

[0026] (1) In the reaction vessel, add 0.1 g of tellurium powder, 0.12 g of antimony chloride, 200 ml of distilled water, 5 g of polyethylene glycol, 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 Spherical nanocore.

[0027] (2) Sb 2 Te 3 The spherical nano-core powder is taken out, washed with ethanol and distilled water respectively, and dried.

[0028] (3) The washed Sb 2 Te 3 Put the spherical nano-core powder into a 200 ml beaker, add 100 ml of ethanol, and stir with magnetic force. Then add 20 grams of surface treatment reagent mercaptopropionic acid, and stir for 5 hours at room temperature for surface treatment.

[0029] (4) Sb treated with surface treatment agent 2 Te 3 The nano-powder was washed and dried with ethanol and distilled water respectively, and then added to the high-pressure reaction kettle, and then 0.1 g of tellurium powder, 0.12 g o...

Embodiment 3

[0031] (1) In a reaction vessel, add 0.1 g of selenium powder, 0.12 g of antimony nitrate, 200 ml of distilled water, 5 g of polyethylene glycol, 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 Spherical nano core material.

[0032] (2) Sb 2 Se 3 The spherical nano-core powder is taken out, washed with ethanol and distilled water respectively, and dried.

[0033] (3) The washed Sb 2 Se 3 Put the spherical nano-core powder into a 200 ml beaker, add 100 ml of water, and stir with magnetic force. Then add 10 grams of surface treatment reagent bismercaptooxalic acid, and stir for 5 hours at room temperature for surface treatment.

[0034] (4) Sb treated with surface treatment agent 2 Se 3 The spherical nano-core powder was washed and dried with ethanol and distilled water respectively, and then added to the autoclave, followed by adding 0.1 g of tellurium powder, ...

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Abstract

The invention relates to a preparation method of nano thermoelectric material. The core and shell of the core-shell structure nano thermoelectric material prepared by the current method are not well combined. The method of the present invention is as follows: adding raw materials into a reaction vessel, adding distilled water, potassium borohydride, sodium hydroxide and polyethylene glycol to prepare spherical nano-cores; washing and drying the spherical nano-cores, dispersing them in a solvent, and performing surface Processing: Add the spherical nano-core into the high-pressure reactor, then add the raw materials, potassium borohydride and sodium hydroxide, add distilled water, the core-shell structure nano-thermoelectric material. 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. In the present invention, the end group of the surface treatment additive can be complexed with elements such as bismuth, antimony, zinc, lead, cobalt, iron, tin and the like in the spherical nano core and shell of the thermoelectric material, thereby realizing the spherical nano core and shell of tight connection.

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 core-shell 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, petrochemical,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34H10N10/01
Inventor 袁求理聂秋林殷好勇
Owner HANGZHOU DIANZI UNIV