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Magnesium-antimony-based thermoelectric element and preparation method and application thereof

A thermoelectric element, magnesium-antimony-based technology, applied in the manufacture/processing of thermoelectric devices, thermoelectric device parts, thermoelectric device junction lead wire materials, etc. low cost effect

Active Publication Date: 2020-09-01
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some traditional electrode materials (such as aluminum, silver, copper, nickel, etc.) cannot be tightly combined with magnesium-antimony-based thermoelectric materials, some have too high contact resistance, and some will react with the material matrix

Method used

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  • Magnesium-antimony-based thermoelectric element and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mg chips, Mn powder, Bi particles, Sb particles, Te powder according to the chemical formula Mg 3.275 mn 0.025 Bi 0.5 Sb 1.49 Te 0.01 After weighing, it was ball milled for 12 hours to obtain the mixture powder, which was sintered into a cylindrical bulk material with a thickness of 1.2 mm and a diameter of 12.7 mm by spark plasma sintering. The sintering process is as follows: the heating rate is 50°C per minute, the temperature is kept at 600°C for 2 minutes, and then the temperature is raised to 800°C for 2 minutes and then cooled with the furnace. The pressure during the sintering process is 50Mpa.

[0032] (2) Mg scrap and Cu powder according to the chemical formula Mg 2 Cu was weighed and ball milled for 6 hours to obtain transition layer powder.

[0033] (3) The base thermoelectric material, the transition layer powder and the copper foil as the electrode layer are according to figure 1 The positions shown are placed in the mold for sintering. The sint...

Embodiment 2

[0036] (1) Mg chips, Mn powder, Bi particles, Sb particles, Te powder according to the chemical formula Mg 3.275 mn 0.025 Bi 0.5 Sb 1.49 Te 0.01 After weighing, it was ball-milled for 12 hours to obtain the mixture powder, which was sintered by spark plasma to form a matrix layer of a cylindrical bulk magnesium-antimony-based thermoelectric material with a thickness of 1.2 mm and a diameter of 12.7 mm. The sintering process is as follows: the heating rate is 50°C per minute, the temperature is kept at 600°C for 2 minutes, and then the temperature is raised to 800°C for 2 minutes and then cooled with the furnace. The pressure during the sintering process is 50Mpa.

[0037] (2) Put the magnesium-antimony-based thermoelectric material matrix layer prepared in step (1) into a beaker filled with alcohol, clean it with an ultrasonic cleaner for 20 minutes, then dry it with a hair dryer or a drying device, and then fix it on In a magnetron sputtering apparatus with copper and mag...

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Abstract

The invention provides a magnesium-antimony-based thermoelectric element and a preparation method and application thereof. The magnesium-antimony-based thermoelectric element comprises a magnesium-antimony-based thermoelectric material matrix layer which is located in the center of the thermoelectric element, transition layers which are attached to the two surfaces of the matrix layer and two electrode layers which are attached to the surfaces of the two transition layers respectively, wherein the transition layers are made of magnesium-copper alloy and / or magnesium-aluminum alloy, and the electrode layers are made of copper. The transition layer and the electrode layer which are developed by the invention and can be suitable for the magnesium-antimony-based thermoelectric material have important application significance and prospects, the electrode layer enables the magnesium-antimony-based thermoelectric material to have an opportunity to enter the market, and the industrialization becomes possible. Compared with an existing bismuth telluride thermoelectric device in the market, the prepared thermoelectric element is lower in cost, meanwhile, the rare element tellurium can be saved, and the thermoelectric element is beneficial to energy saving and environment protection.

Description

technical field [0001] The invention relates to a magnesium-antimony-based thermoelectric element, a preparation method thereof, and a thermoelectric cooling device comprising the magnesium-antimony-based thermoelectric element. Background technique [0002] Thermoelectric materials are functional materials that can directly convert heat and electricity into each other. Thermoelectric components made of thermoelectric materials have the advantages of light weight, small size, simple structure, no noise, zero emission, and long service life. This is of great significance for solving severe problems such as energy crisis and environmental pollution, and therefore has received great attention from all countries in the world. [0003] With the development of new material design concepts and new device fabrication processes and technologies, the performance of thermoelectric materials has been gradually optimized and improved. At the same time, thermoelectric devices have also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/02H01L35/16H01L35/18H01L35/34H10N10/80H10N10/01H10N10/852H10N10/853
CPCH10N10/80H10N10/853H10N10/852H10N10/01
Inventor 赵怀周杨佳伟常思轶高君玲
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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