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A kind of preparation method of high-performance gesbte-based thermoelectric material

A technology of thermoelectric materials and raw materials, which is applied in the manufacture/processing of thermoelectric devices, and lead-out wire materials of thermoelectric devices. , the effect of reducing the carrier concentration and improving the thermoelectric performance

Active Publication Date: 2020-04-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

First of all, from the perspective of composition, Pb-containing samples are toxic and have varying degrees of damage to the human body and the environment; secondly, the samples prepared only by fusion bonding and sintering have disordered microstructure, uneven composition, poor density, and insufficient strength. It not only affects the accuracy of the test data, but also affects the stability of the later use process, so this limits the further research and application of GeTe-based thermoelectric materials, especially in the field of micro devices

Method used

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  • A kind of preparation method of high-performance gesbte-based thermoelectric material
  • A kind of preparation method of high-performance gesbte-based thermoelectric material
  • A kind of preparation method of high-performance gesbte-based thermoelectric material

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Embodiment 1

[0034] A method for preparing a high-performance GeSbTe-based thermoelectric material, comprising the steps of:

[0035] 1) Using Ge, Sb and Te simple substances as raw materials, according to Ge 0.93 Sb 0.06 The stoichiometric ratio of Te weighs each raw material, puts the weighed raw material into a quartz test tube and vacuum seals it, then puts the quartz tube into a melting furnace and heats it to 1100°C for 24 hours until the reaction is complete, and finally cools to room temperature with the furnace. Ingot product;

[0036] 2) Place the ingot product obtained in step 1) in a quartz tube with a nozzle diameter of 0.5mm, place the quartz tube above the radio frequency copper roller for induction melting, and spray the molten alloy obtained by smelting on a 10m On the copper roller that rotates at / s, the thin strip product is obtained;

[0037] 3) Grind the strip product obtained in step 2), and then perform PAS sintering at a temperature of 500°C and a pressure of 50...

Embodiment 2

[0040] A method for preparing a high-performance GeSbTe-based thermoelectric material, comprising the steps of:

[0041] 1) Using Ge, Sb and Te simple substances as raw materials, according to Ge 0.98 Sb 0.01The stoichiometric ratio of Te weighs each raw material, puts the weighed raw material into a quartz test tube and vacuum seals it, then puts the quartz tube into a melting furnace and heats it to 1100°C for 24 hours until the reaction is complete, and finally cools to room temperature with the furnace. Ingot product;

[0042] 2) Place the ingot product obtained in step 1) in a quartz tube with a nozzle of 0.5mm in diameter, and place the quartz tube above the radio frequency copper roller for induction melting. On the copper roller that rotates at / s, a thin strip product is obtained;

[0043] 3) Grinding the ribbon product obtained in step 2), and then performing PAS sintering at a temperature of 480° C. and a pressure of 52 MPa for 5 minutes to obtain a dense block, ...

Embodiment 3

[0045] A method for preparing a high-performance GeSbTe-based thermoelectric material, comprising the steps of:

[0046] 1) Using Ge, Sb and Te simple substances as raw materials, according to Ge 0.89 Sb 0.1 The stoichiometric ratio of Te weighs each raw material, puts the weighed raw material into a quartz test tube and vacuum seals it, then puts the quartz tube into a melting furnace and heats it to 1100°C for 24 hours until the reaction is complete, and finally cools to room temperature with the furnace. Ingot product;

[0047] 2) Place the ingot product obtained in step 1) in a quartz tube with a nozzle diameter of 0.5mm, place the quartz tube above the radio frequency copper roller for induction melting, and spray the molten alloy obtained by smelting on a 10m On the copper roller that rotates at / s, a thin strip product is obtained;

[0048] 3) Grinding the ribbon product obtained in step 2), and then performing PAS sintering at a temperature of 520° C. and a pressure...

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Abstract

The invention discloses a preparation method of a high-performance GeSbTe-based thermoelectric material, which comprises the following steps: 1) taking Ge, Sb and Te simple substances as raw materials, weighing each raw material according to the stoichiometric ratio, performing melting treatment, and cooling to room temperature with the furnace Obtain an ingot product; 2) Inductively melt and spin the obtained ingot product to obtain a thin strip product; 3) Grind the thin strip product obtained in step 2), and then perform spark plasma sintering to obtain the GeSbTe based thermoelectric materials. The present invention effectively reduces the carrier concentration of GeTe-based thermoelectric materials by Sb-doping GeTe, and combines the melting and sintering method with the melting spin-spin technology, on the basis of ensuring the GeSbTe-based system structure and composition information, further The microstructure is controlled by the melt spinning process, so as to prepare GeSbTe-based thermoelectric materials with fine structure, stable composition and excellent thermoelectric performance.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric material preparation, and in particular relates to a preparation method of a high-performance GeSbTe-based thermoelectric material. Background technique [0002] Since the discovery of the thermoelectric effect 200 years ago, researchers have carried out a lot of research aimed at improving the thermoelectric figure of merit of existing thermoelectric material systems or expanding new thermoelectric material systems, and have achieved fruitful progress. Fossil fuels not only have limited reserves, but also cause irreversible damage to the environment. Therefore, the research on thermoelectric materials actively responds to the current global call for the development of alternative energy sources from fossil fuels. [0003] GeTe has a high ZT value and is an important medium-high temperature thermoelectric material. In recent years, the research on GeTe-based thermoelectric materials mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34H01L35/16
CPCH10N10/852H10N10/01
Inventor 唐新峰齐尼玛纳·艾瑞思邓日桂苏贤礼鄢永高
Owner WUHAN UNIV OF TECH
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