Fe-doped BiCuSeO thermoelectric material and preparation method thereof

A thermoelectric material and particle size technology, which is applied in the direction of thermoelectric device junction lead-out materials, thermoelectric device manufacturing/processing, etc., can solve problems such as low dimensionless thermoelectric figure of merit ZT, poor electrical transport performance, and low power factor , to achieve the effects of improving electrical transport performance, high production efficiency, and short production cycle

Inactive Publication Date: 2018-01-30
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like other oxide thermoelectric materials, there are also defects such as low electrical conductivity,

Method used

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  • Fe-doped BiCuSeO thermoelectric material and preparation method thereof
  • Fe-doped BiCuSeO thermoelectric material and preparation method thereof
  • Fe-doped BiCuSeO thermoelectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An Fe-doped BiCuSeO thermoelectric material and a preparation method thereof. The steps of the preparation method are:

[0038] The chemical formula of the Fe-doped BiCuSeO thermoelectric material is Fe x Bi 1-x CuSeO, 0.01≤x≤0.02.

[0039] The first step, according to bismuth oxide powder: copper powder: selenium powder: bismuth powder: the ratio of the amount of substance of iron powder is 1: 3: 3: (1-3y): 3y batching, 0.01≤3y=x≤0.02, Then mix evenly to obtain mixed powder.

[0040] In the second step, the mixed powder is put into a ball mill jar, and ball milled for 5-8 hours under an inert atmosphere to obtain a single-phase Fe x Bi 1-x CuSeO powder, 0.01≤x≤0.02.

[0041] The third step, the single-phase Fe x Bi 1-x Put the CuSeO powder into the mold, place it in the plasma activated sintering furnace, and then start to raise the temperature and pressure at a constant speed at the same time, and raise the temperature to 500-600°C and the pressure to 30-50MPa...

Embodiment 2

[0047] An Fe-doped BiCuSeO thermoelectric material and a preparation method thereof. The steps of the preparation method are:

[0048] The chemical formula of the Fe-doped BiCuSeO thermoelectric material is Fe x Bi 1-x CuSeO, 0.02≤x≤0.06.

[0049] The first step, according to bismuth oxide powder: copper powder: selenium powder: bismuth powder: the ratio of the amount of substance of iron powder is 1: 3: 3: (1-3y): 3y batching, 0.02≤3y=x≤0.06, Then mix evenly to obtain mixed powder.

[0050] In the second step, the mixed powder is put into a ball mill jar, and ball milled for 5-8 hours under an inert atmosphere to obtain a single-phase Fe x Bi 1-x CuSeO powder, 0.02≤x≤0.06.

[0051] The third step, the single-phase Fe x Bi 1-x Put the CuSeO powder into the mold, place it in the plasma activated sintering furnace, and then start to raise the temperature and pressure at a constant speed at the same time, and raise the temperature to 500-600°C and the pressure to 30-50MPa...

Embodiment 3

[0057] An Fe-doped BiCuSeO thermoelectric material and a preparation method thereof. The steps of the preparation method are:

[0058] The chemical formula of the Fe-doped BiCuSeO thermoelectric material is Fe x Bi 1-x CuSeO, 0.06≤x≤0.08.

[0059] The first step, according to bismuth oxide powder: copper powder: selenium powder: bismuth powder: the ratio of the amount of substance of iron powder is 1: 3: 3: (1-3y): 3y batching, 0.06≤3y=x≤0.08, Then mix evenly to obtain mixed powder.

[0060] In the second step, the mixed powder is put into a ball mill jar, and ball milled for 5-8 hours under an inert atmosphere to obtain a single-phase Fe x Bi 1-x CuSeO powder, 0.06≤x≤0.08.

[0061] The third step, the single-phase Fe x Bi 1-x Put the CuSeO powder into the mold, place it in the plasma activated sintering furnace, and then start to raise the temperature and pressure at a constant speed at the same time, and raise the temperature to 500-600°C and the pressure to 30-50MPa...

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Abstract

The invention relates to a Fe-doped BiCuSeO thermoelectric material and a preparation method thereof. The preparation method is characterized by comprising the steps of: preparing materials accordingto an amount-of-substance ratio of bismuth oxide powder to copper powder to selenium powder: bismuth powder to iron powder being 1:3:3:(1-3y):3y, wherein 0.01<=3y = x <=0.08, mixing the powder, putting the mixed powder into a ball-milling tank, performing ball milling on the mixed powder under the condition of an inert atmosphere to prepare single-phase FexBi1-XCuSeO powder, putting the single-phase FexBi1-XCuSeO powder into a mold, placing the mold in a plasma activated sintering furnace, raising the temperature to 500-700 DEG C at a constant speed and raising the pressure to 30-100 MPa at aconstant speed simultaneously, maintaining the temperature and pressure simultaneously, then reducing the temperature to normal temperature at a constant speed and reducing the pressure to normal pressure at a constant speed simultaneously, taking out the sintered mold, and demolding to obtain the Fe-doped BiCuSeO thermoelectric material. The preparation method has the advantages of simple process, short production cycle and high production efficiency. The prepared product has the advantages of high purity, low thermal conductivity, high electrical conductivity, good electrical transmission performance, high power factor and high dimensionless thermoelectric figure of merit ZT.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric materials. Specifically relates to an Fe-doped BiCuSeO thermoelectric material and a preparation method thereof. Background technique [0002] Thermoelectric materials can realize the direct conversion of thermal energy and electrical energy, and have good application prospects in the use of high-temperature industrial low-grade waste heat and distributed low-temperature waste heat for thermoelectric power generation, and have become a research hotspot in the field of materials. The key parameter "dimensionless figure of merit" that determines the thermoelectric conversion efficiency of materials ZT=(S 2 σ / κ)T; where: S is the Seebeck coefficient, σ is the electrical conductivity and κ is the thermal conductivity. A good thermoelectric material should meet the requirements of high electromotive force, high electrical conductivity and low thermal conductivity. At present, the thermoelectr...

Claims

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Application Information

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IPC IPC(8): H01L35/16H01L35/34
Inventor 樊希安冯波江程鹏李光强贺铸李亚伟
Owner WUHAN UNIV OF SCI & TECH
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