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Preparation method of antimony telluride block thermoelectric material

A technology of thermoelectric material and antimony telluride block, which is applied in the manufacture/processing of thermoelectric devices, and lead wire materials of thermoelectric device nodes, etc., can solve the problems of long time consumption, complex process, high consumption of resources and energy, etc. Low, broad application prospects, easy mass production effect

Pending Publication Date: 2020-07-17
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the preparation method of the existing antimony telluride-based bulk thermoelectric material is complicated in process, takes a long time, and consumes more resources and energy.

Method used

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  • Preparation method of antimony telluride block thermoelectric material
  • Preparation method of antimony telluride block thermoelectric material
  • Preparation method of antimony telluride block thermoelectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of antimony telluride bulk thermoelectric material includes the following steps:

[0026] (1) Powder synthesis: Add 0.002mol SbCl to 80mL of deionized water in sequence 3 , 0.003mol TeO2, 0.4g PVA and 4.48g KOH, stir for 1h, then add 1.2g KBH 4 , Continue to stir for 30 min. Transfer the above solution to a reaction kettle, heat it to 180°C for 24 hours, then wash it with deionized water and absolute ethanol several times, and dry it under vacuum at 60°C for 8 hours to obtain antimony telluride powder;

[0027] (2) Powder cold pressing: 0.8g of antimony telluride powder is put into a stainless steel mold with a diameter of 12.7mm, and cold pressed at a pressure of 30MPa for 30 minutes at room temperature to form a bulk material of antimony telluride;

[0028] (3) Block annealing: Put the block into a tube furnace, pass in argon as a protective gas, quickly raise it to 275°C at a heating rate of 5°C / min, and keep it at room temperature for 1 hour.

Embodiment 2

[0030] A preparation method of antimony telluride bulk thermoelectric material includes the following steps:

[0031] (1) Powder synthesis: Add 0.002molSbCl to 80mL of deionized water in sequence 3 , 0.003mol TeO2, 0.4g PVA and 4.48g KOH, stir for 1h, then add 1.2g KBH 4 , Continue to stir for 30 min. Transfer the above solution to a reaction kettle, heat it to 180°C for 24 hours, then wash it with deionized water and absolute ethanol several times, and vacuum dry it at 60°C for 8 hours to obtain antimony telluride powder;

[0032] (2) Powder cold pressing: 0.8g of antimony telluride powder is put into a stainless steel mold with a diameter of 12.7mm, and cold pressed at a pressure of 30MPa for 30 minutes at room temperature to form a bulk material of antimony telluride;

[0033] (3) Block annealing: Put the block into a tube furnace, pass in argon as a protective gas, and rapidly increase the temperature to 425°C at a heating rate of 5°C / min for 1 hour, and then cool to room tempera...

Embodiment 3

[0035] A preparation method of antimony telluride bulk thermoelectric material includes the following steps:

[0036] (1) Powder synthesis: add 0.001 mol SbCl to 80 mL of deionized water sequentially 3 , 0.0015mol TeO2, 0.2g sodium dioctyl succinate sulfonate and 2.24g KOH, stir for 1h, then add 0.6g KBH 4 , Continue to stir for 30 min. Transfer the above solution to a reaction kettle, heat it to 150°C for 20 hours, then wash it with deionized water and absolute ethanol several times, and dry it under vacuum at 60°C for 8 hours to obtain antimony telluride powder;

[0037] (2) Powder cold pressing: Put 1.2g of antimony telluride powder into a stainless steel mold with a diameter of 10mm, and press it into a block material of antimony telluride by cold pressing at room temperature at a pressure of 10MPa for 10 minutes;

[0038] (3) Block annealing: Put the block into a tube furnace, pass in nitrogen as a protective gas, and rapidly increase the temperature to 200°C at a heating rate o...

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Abstract

The invention discloses a preparation method of an antimony telluride block thermoelectric material. The preparation method is characterized by comprising the following steps: adding SbCl3, TeO2, a surfactant and KOH into deionized water to prepare a precursor solution; stirring to dissolve; adding potassium borohydride; continuing to stir; transferring the solution into a reaction kettle to react; washing with deionized water and absolute ethyl alcohol for multiple times; and carrying out vacuum drying to obtain antimony telluride powder; putting antimony telluride powder into a stainless steel mold; and carrying out cold pressing at room temperature to form a block; and putting the block into a tubular furnace; introducing protective gas; heating; keeping the temperature; carrying out annealing treatment; and cooling to room temperature to obtain the antimony telluride block thermoelectric material. The antimony telluride block thermoelectric material is prepared through a cold pressing and annealing combined method, the prepared p-type antimony telluride block thermoelectric material has good thermoelectric performance, meanwhile, the preparation process is simple and easy to operate; the cost is low; large-scale production is easy to achieve; and the p-type antimony telluride block thermoelectric material has wide application prospects in the fields of thermoelectric powergeneration and refrigeration devices.

Description

Technical field [0001] The invention relates to a method for preparing an antimony telluride bulk thermoelectric material, and belongs to the field of inorganic nano bulk thermoelectric materials. Background technique [0002] As a new energy material with application potential, thermoelectric materials use inherent carrier transport to realize the mutual conversion of heat and electric energy. In recent years, they have attracted people's attention and have a wide range of applications in thermoelectric power generation and refrigeration. The energy conversion efficiency of thermoelectric materials is represented by the dimensionless thermoelectric figure of merit, and its expression is as follows: [0003] [0004] Among them, S and σ are the Seebeck coefficient and conductivity of the material, κ is the thermal conductivity, and T is the absolute temperature. It can be seen from the above formula that the optimization of thermoelectric performance needs to increase the power fa...

Claims

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Application Information

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IPC IPC(8): H01L35/34H01L35/18H01L35/16
CPCH10N10/852H10N10/853H10N10/01
Inventor 杜永朱其旗孟秋风
Owner SHANGHAI INST OF TECH
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