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Novel method for quickly preparing high-performance CuInTe2-base thermoelectric material

A thermoelectric material and high-performance technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of complex process, unfavorable commercial application, long preparation cycle, etc., and achieve good repeatability, high efficiency and energy saving. Cooling rate, fast response effect

Inactive Publication Date: 2015-09-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melting annealing method generally takes 4 to 7 days, the process involved is complicated, and the preparation cycle is long, which is not conducive to commercial application.

Method used

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  • Novel method for quickly preparing high-performance CuInTe2-base thermoelectric material
  • Novel method for quickly preparing high-performance CuInTe2-base thermoelectric material
  • Novel method for quickly preparing high-performance CuInTe2-base thermoelectric material

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Effect test

Embodiment 1

[0029] A rapid preparation of high performance CuInTe 2 A new method based on thermoelectric materials, including the following steps:

[0030] 1) According to the chemical formula Cu 1-x InTe 2 The stoichiometric ratio of each element in the formula takes Cu powder, In powder and Te powder as raw materials, wherein x=0, grinds and mixes the weighed raw materials evenly, and then presses them into a block green body (the pressure is 2MPa, and the holding time is 3min);

[0031] 2) The block body obtained in step 1) is partially ignited at one end to initiate a high-temperature self-propagating synthesis reaction (SHS) and then naturally cooled to obtain an ingot (close to single-phase CuInTe 2 base compound);

[0032] 3) Grinding the ingot obtained in step 2) into powder, and then performing discharge plasma activation sintering (PAS) to obtain single-phase high-performance CuInTe 2 based thermoelectric materials. The sintering process parameters are as follows: under th...

Embodiment 2

[0035] A rapid preparation of high performance CuInTe 2 A new method based on thermoelectric materials, including the following steps:

[0036] 1) According to the chemical formula Cu 1-x InTe 2The stoichiometric ratio of each element in the formula takes Cu powder, In powder and Te powder as raw materials, wherein x=0.05, grinds and mixes the weighed raw materials evenly, and then presses them into a block green body (the pressure is 3MPa, and the holding time is 5min);

[0037] 2) The block body obtained in step 1) is partially ignited at one end to initiate a high-temperature self-propagating synthesis reaction (SHS) and then naturally cooled to obtain an ingot (close to single-phase CuInTe 2 base compound);

[0038] 3) Grinding the ingot obtained in step 2) into powder, and then performing discharge plasma activation sintering (PAS) to obtain single-phase high-performance CuInTe 2 based thermoelectric materials. The sintering process parameters are as follows: under ...

Embodiment 3

[0041] A rapid preparation of high performance CuInTe 2 A new method based on thermoelectric materials, including the following steps:

[0042] 1) According to the chemical formula Cu 1-x InTe 2 The stoichiometric ratio of each element in the formula takes Cu powder, In powder and Te powder as raw materials, wherein x=0.1, grinds and mixes the weighed raw materials evenly, and then presses them into a block green body (the pressure is 5MPa, and the holding time is 8min);

[0043] 2) The block body obtained in step 1) is partially ignited at one end to initiate a high-temperature self-propagating synthesis reaction (SHS) and then naturally cooled to obtain an ingot (close to single-phase CuInTe 2 base compound);

[0044] 3) Grinding the product obtained in step 2) into powder, and then performing discharge plasma activation sintering (PAS) to obtain single-phase high-performance CuInTe 2 based thermoelectric materials. The sintering process parameters are under the condit...

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Abstract

The invention discloses a novel method for quickly preparing a high-performance CuInTe2-base thermoelectric material, which comprises the following steps: 1) weighing raw materials Cu powder, In powder and Te powder according to the stoichiometric proportion of the elements in the chemical formula Cu[1-x]InTe2 (0<=x<=0.2), grinding and uniformly mixing the powder raw materials, and pressing into a block billet; 2) initiating high-temperature self-propagating synthesis reaction on the block billet obtained in the step 1), and after the reaction finishes, naturally cooling to obtain the nearly-single-phase CuInTe2-base thermoelectric material. The method has the advantages of high reaction speed, simple technique, high efficiency, energy saving, favorable repetitiveness and the like; the whole preparation process can be completed within 15 minutes; and the optimal thermoelectric value of the obtained block can reach 0.58 under 720K.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy materials, in particular to a method for rapidly preparing high-performance CuInTe 2 A new approach to thermoelectric materials. Background technique [0002] At present, the global natural environment has been deteriorating due to the use of unclean energy, which seriously threatens the sustainable development of human beings; as we all know, the main source of energy in the world is still fossil energy (coal, oil and natural gas), but these energy sources on the earth Reserves are extremely limited. With the progress and development of human society, these energy sources are continuously mined, resulting in the rapid depletion of fossil energy reserves; not only that, these non-renewable energy sources will inevitably exclude some harmful gases during the use, which is harmful to nature. The environment is seriously polluted. Therefore, the development of new, environmentally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/00
Inventor 唐新峰梁涛马世林谭晓鸣刘欢谢鸿耀苏贤礼鄢永高
Owner WUHAN UNIV OF TECH
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