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High-performance Cu2SnSe3 thermoelectric material and rapid preparing method thereof

A thermoelectric material and high-performance technology, applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, chemical instruments and methods, etc. and other problems, to achieve the effect of fast reaction speed, precise control of product stoichiometric ratio, and short sintering process time.

Active Publication Date: 2014-07-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low melting point of Se (221 °C), Se volatilized severely during the long-term reaction process, thus destroying the Cu 2 SnSe 3 stoichiometric ratio, which in turn has a greater impact on the repeatability of sample performance

Method used

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  • High-performance Cu2SnSe3 thermoelectric material and rapid preparing method thereof
  • High-performance Cu2SnSe3 thermoelectric material and rapid preparing method thereof
  • High-performance Cu2SnSe3 thermoelectric material and rapid preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A single-phase Cu 2 SnSe 3 The rapid preparation method of compound, it comprises the following steps:

[0038]1) Prepare Cu powder, Se powder and Sn powder as raw materials according to the stoichiometric ratio of 2.02:3.03:1, weigh the total amount of Cu powder, Se powder and Sn powder to be 5g, and mix the raw materials evenly in an agate mortar to obtain the reaction Put the reactant into a steel mold, press 10MPa on the tablet machine to form a f10mm block, and then put it into a quartz glass tube (17mm inner diameter, 20mm outer diameter);

[0039] 2) In an air atmosphere, put the quartz glass tube into a muffle furnace at 300°C for direct heating, self-propagating reaction occurs, and the reaction is completed in 30 seconds. After the reaction is completed, naturally cool to obtain Cu 2 SnSe 3 compound.

[0040] figure 1 It is the XRD spectrum of the product obtained after the self-propagating reaction. It can be seen from the figure that the product obtain...

Embodiment 2

[0042] A high performance Cu 2 SnSe 3 A rapid preparation method for thermoelectric materials, which comprises the following steps:

[0043] 1) Prepare Cu powder, Se powder and Sn powder as raw materials according to the stoichiometric ratio of 2.02:3.03:1, weigh the total amount of Cu powder, Se powder and Sn powder to be 5g, and mix the raw materials evenly in an agate mortar to obtain the reaction Put the reactant into a steel mold, press 10MPa on the tablet machine to form a f10mm block, and then put it into a quartz glass tube (17mm inner diameter, 20mm outer diameter);

[0044] 2) In an air atmosphere, put the quartz glass tube into a muffle furnace at 500°C and heat it directly until the self-propagating reaction occurs, stop heating, and cool naturally after the reaction is completed to obtain Cu 2 SnSe 3 compound.

[0045] 3) Cu will be obtained 2 SnSe 3 The product powder is put into a graphite mold for compaction, and then plasma activated sintering (PAS sinte...

Embodiment 3

[0050] A kind of fast preparation method of high-performance Cu2SnSe3 thermoelectric material, it comprises the following steps:

[0051] 1) Prepare Cu powder, Se powder and Sn powder as raw materials according to the stoichiometric ratio of 2.02:3.03:1, weigh the total amount of Cu powder, Se powder and Sn powder to be 5g, and mix the raw materials evenly in an agate mortar to obtain the reaction Put the reactant into a steel abrasive tool, use 10MPa pressure on the tablet machine to form a f10mm block, and then put it into a quartz glass tube (with an inner diameter of 17mm and an outer diameter of 20mm);

[0052] 2) In an air atmosphere, put the quartz glass tube into a muffle furnace at 1000°C and heat it directly until the self-propagating reaction occurs, stop heating, and cool naturally after the reaction is completed to obtain Cu 2 SnSe 3 compound.

[0053] Figure 9 is the XRD pattern of the product obtained after the self-propagating reaction, from Figure 9 It c...

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Abstract

The invention relates to a high-performance Cu2SnSe3 thermoelectric material and a rapid preparing method thereof. The method includes the following steps that (1) Cu powders, Se powders and Sn powders are prepared as raw materials according to a stoichiometric ratio of 2.02: 3.03: 1, and then the Cu powders, the Se powders and the Sn powders are uniformly mixed to form a reactant; (2) self-propagating reaction of the reactant which is obtained in the step (1) is initiated, and naturally cooling is performed after the reaction is finished to obtain Cu2SnSe3 product; (3) the Cu2SnSe3 product obtained in the step (2) is ground to form fine powders, and then plasma activated sintering is performed to obtain the high-performance Cu2SnSe3 thermoelectric material. The high-performance Cu2SnSe3 thermoelectric material and the rapid preparing method thereof have the advantages that the reaction time is short, operation is simple and convenient, large devices are not required, noises are absent, and the performances of the product are 37.8% higher than those of products by traditional methods.

Description

technical field [0001] The invention belongs to the technical field of new energy material preparation-self-propagating high-temperature synthesis, and specifically relates to a high-performance Cu 2 SnSe 3 Thermoelectric materials and rapid preparation methods thereof. Background technique [0002] In the past ten years, with the rapid population expansion and rapid industrial development, energy and environmental issues have gradually become prominent. Finding and developing new energy sources and new energy materials has become a research hotspot for scientists around the world. Thermoelectric conversion technology can use the Seebeck effect and Peltier effect of thermoelectric materials to realize the mutual conversion between electric energy and thermal energy. As an environmentally friendly material, it is useful in utilizing industrial waste heat and waste heat, automobile exhaust gas, geothermal energy, solar energy, and ocean temperature differences. It has impor...

Claims

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Application Information

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IPC IPC(8): B22F3/105C01B19/00H01L35/34H01L35/16
Inventor 唐新峰程鑫张清杰
Owner WUHAN UNIV OF TECH
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