High-voltage preparation method of Er-doped bismuth telluride-based pseudo ternary thermoelectric material

A bismuth telluride-based pseudo-thermoelectric material technology, which is applied in the manufacture/processing of thermoelectric devices, thermoelectric device node lead-out materials, etc., can solve the problems of ZT value reduction and achieve lattice thermal conductivity reduction, power transmission The effect of improved transport performance and simple preparation process

Active Publication Date: 2021-08-20
HARBIN INST OF PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But with increasing temperature, the ZT value decreases sharply, limiting the Bi 2 Te 3 Application of Base Alloys in Power Generation Field

Method used

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  • High-voltage preparation method of Er-doped bismuth telluride-based pseudo ternary thermoelectric material
  • High-voltage preparation method of Er-doped bismuth telluride-based pseudo ternary thermoelectric material
  • High-voltage preparation method of Er-doped bismuth telluride-based pseudo ternary thermoelectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] High pressure preparation method using ER doped tantaltinate three-membered thermoelectric material

[0034] 1. According to BI powder (99.99%), Sb powder (99.99%), SE powder (99.99%) and TE powder (99.99%) according to the chemical measurement ratio (molar ratio of 180: 2: 285: 15), will A well raw material is encapsulated into a vacuum glass tube, and the vacuum smelting is carried out at a temperature of 800 ° C, and the powder is synthesized (Bi 2 TE 3 ) 0.90 (SB 2 TE 3 ) 0.05 (SB 2 SE 3 ) 0.05 Orientation crystals.

[0035] 2, will be (BI) 2 TE 3 ) 0.90 (SB 2 TE 3 ) 0.05 (SB 2 SE 3 ) 0.05 The orientation crystal is broken into a powder, and the rare earth element Er is added, and the mixture is obtained, wherein the amount of the rare earth element ER is 0.1% of the total mass. The mixture was pulverized to about 1 mm, and the petroleum ether is a ball milling medium, under the condition of 410 r / min, the spherium is 10: 1, the mechanical ball milling 50 h, the rare ...

Embodiment 2

[0040] High pressure preparation method using ER doped tantaltinate three-membered thermoelectric material

[0041] 1. According to BI powder (99.99%), Sb powder (99.99%), SE powder (99.99%) and TE powder (99.99%) according to the chemical measurement ratio (molar ratio of 180: 2: 285: 15), will A well raw material is encapsulated into a vacuum glass tube, and the vacuum smelting is carried out at a temperature of 800 ° C, and the powder is synthesized (Bi 2 TE 3 ) 0.90 (SB 2 TE 3 ) 0.05 (SB 2 SE 3 ) 0.05 Orientation crystals.

[0042] 2, will be (BI) 2 TE 3 ) 0.90 (SB 2 TE 3 ) 0.05 (SB 2 SE 3 ) 0.05 The orientation crystal is broken into a powder, and the rare earth element Er is added, and the mixture is obtained, wherein the amount of rare earth element Er is 0.5% of the total mass. The mixture was pulverized to about 1 mm, and the petroleum ether is a ball milling medium, under the condition of 410 r / min, the spherium is 10: 1, the mechanical ball milling 50 h, the rare eart...

Embodiment 3

[0047] High pressure preparation method using ER doped tantaltinate three-membered thermoelectric material

[0048] 1. According to BI powder (99.99%), Sb powder (99.99%), SE powder (99.99%) and TE powder (99.99%) according to the chemical measurement ratio (molar ratio of 180: 2: 285: 15), will A well raw material is encapsulated into a vacuum glass tube, and the vacuum smelting is carried out at a temperature of 800 ° C, and the powder is synthesized (Bi 2 TE 3 ) 0.90 (SB 2 TE 3 ) 0.05 (SB 2 SE 3 ) 0.05 Orientation crystals.

[0049] 2, will be (BI) 2 TE 3 ) 0.90 (SB 2 TE 3 ) 0.05 (SB 2 SE 3 ) 0.05 The orientation crystal is broken into a powder, and the rare earth element Er is added, and the mixture is obtained, wherein the amount of the rare earth element ER is 1.0% of the total mass. The mixture was pulverized to about 1 mm, and the petroleum ether is a ball milling medium, under the condition of 410 r / min, the spherium is 10: 1, the mechanical ball milling 50 h, the rare ...

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Abstract

The invention discloses a high-pressure preparation method of an Er-doped bismuth telluride-based pseudo-ternary thermoelectric material. The method comprises the following steps: weighing Bi powder, Sb powder, Se powder and Te powder according to a stoichiometric ratio, carrying out vacuum melting at 800 DEG C to synthesize (Bi2Te3)0.90(Sb2Te3)0.05(Sb2Se3)0.05 oriented crystal from the powder, adding rare earth Er, crushing the mixture, carrying out ball milling to obtain n-type pseudo-ternary Er-doped alloy powder, carrying out high temperature and high pressure on the alloy powder to obtain a high-temperature and high-pressure synthetic block, crushing the synthetic block, carrying out secondary high-pressure block forming, and then carrying out vacuum sintering to obtain the n-type pseudo ternary Er-doped alloy powder. The mechanical property of the material can be improved, the conductivity of the material can be greatly improved, the material becomes a thermoelectric material with application prospects, meanwhile, the preparation process is simple, operation is easy, and the requirement for preparation conditions is not high.

Description

Technical field [0001] The present invention relates to the field of preparation of thermoelectric material, and more particularly to a high pressure preparation method for use ER doped trimethical trimmer thermoelectric material. Background technique [0002] Thermoelectric conversion technology is a new cleaning energy technology directly converting heat into electrical energy. The core of the thermoelectric conversion technology is a thermoelectric material that converts the waste heat in the production and life into electrical energy by thermoelectric material into electrical energy, and improving the efficiency of the use of traditional energy sources, or the thermoelectric material can be powered to achieve solid refrigeration. The thermoelectric appliance made of thermoelectric material has the advantages of small size, light, noise, no vibration, no pollution to environment, has important application value and extensive application prospects in the field of temperature di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/16H01L35/18H01L35/34
CPCH10N10/853H10N10/852H10N10/01
Inventor 曹显莹曲阳
Owner HARBIN INST OF PETROLEUM
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