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A kind of preparation method of thermoelectric power generation material

A thermoelectric power generation and weighing technology, applied in the manufacture/processing of thermoelectric devices, thermoelectric device junction lead-out materials, etc., can solve the problems of low electrical conductivity, low thermoelectric conversion efficiency, high thermal conductivity, etc., to reduce thermal conductivity efficiency, good electron mobility, and high mechanical strength

Active Publication Date: 2022-04-12
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention aims to solve the problems of high thermal conductivity, low electrical conductivity and low thermoelectric conversion efficiency of existing bismuth telluride thermoelectric power generation materials, and further provides a preparation method of thermoelectric power generation materials

Method used

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  • A kind of preparation method of thermoelectric power generation material
  • A kind of preparation method of thermoelectric power generation material
  • A kind of preparation method of thermoelectric power generation material

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specific Embodiment approach 1

[0037] Specific embodiment 1: In this embodiment, a method for preparing a thermoelectric power generation material is carried out according to the following steps:

[0038] 1. Weighing:

[0039] According to the general structural formula as Bi 2 Te 2.7 Se 0.3-xThe stoichiometric ratio of bismuth powder, tellurium powder and selenium powder is weighed; wherein 0.01≤x≤0.05; silicon carbide nanowires are weighed, and the quality of silicon carbide nanowires is 0% to 0% of the total mass of bismuth powder, tellurium powder and selenium powder 0.8%;

[0040] 2. Ball milling:

[0041] Place the bismuth powder, tellurium powder, selenium powder and silicon carbide nanowires weighed in step 1 in a ball milling jar, add grinding aids and grinding balls, seal the ball milling jar, inject nitrogen after vacuuming, and then vacuumize, and finally Under the condition of rotating speed of 300rpm-500rpm, grind for 8h-10h to obtain the product after ball milling;

[0042] 3. Heat trea...

specific Embodiment approach 2

[0058] Embodiment 2: This embodiment differs from Embodiment 1 in that the grinding aid described in step 2 is absolute ethanol. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0059] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, the ball-to-material ratio is (14-21):1 and the balls are put into the grinding ball. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a thermoelectric power generation material, which relates to a preparation method of a thermoelectric material. The invention aims to solve the problems of high thermal conductivity, low electrical conductivity and low thermoelectric conversion efficiency of existing bismuth telluride thermoelectric power generation materials. Methods: 1. weighing; 2. ball milling; 3. heat treatment; 4. hot pressing sintering. The invention is used for the preparation of thermoelectric power generation materials.

Description

technical field [0001] The invention relates to a preparation method of a thermoelectric material. Background technique [0002] A thermoelectric material is a material that can realize direct mutual conversion of thermal energy and electrical energy, and can be used to manufacture thermoelectric engines or thermoelectric coolers. The discovery of the Seebeck effect (also known as the first thermoelectric effect) in 1823 and the Peltier effect in 1834 provided a theoretical basis for the application of thermoelectric refrigeration and thermoelectric energy converters. In the late 20th century, it was discovered that the extensive use of freon refrigerants had a huge destructive effect on the earth's ozone layer, and finding new refrigeration methods became a hot topic for scientists, which provided a new opportunity for the research of thermoelectric materials. Studies have found that thermoelectric materials are strong, light in weight, small in size, and have no noise dur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/16H01L35/34C04B35/547C04B35/622C04B35/645C04B35/80
CPCC04B35/547C04B35/622C04B35/645C04B2235/6567H10N10/852H10N10/01
Inventor 帅永邱杭宇倪晨旭陈钊李玲高俊雄
Owner HARBIN INST OF TECH
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