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Bi2S3-doped PbS thermoelectric material and preparation method thereof

A technology of thermoelectric material and hydrothermal method, which is applied in the direction of thermoelectric device junction lead wire material, etc., can solve the problems of difficult mass production, complex production process, and high equipment requirements, and achieves low production cost, simple equipment operation, and excellent thermoelectricity. The effect of increasing the value

Inactive Publication Date: 2017-04-05
涂艳丽
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Problems solved by technology

However, the melting method requires high temperature conditions, and its equipment requirements are relatively high, the production process is relatively complicated, the cost is high, and the cycle is long, so it is not easy to carry out large-scale production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] A doped 3wt%Bi 2 S 3 The PbS thermoelectric material, its preparation method comprises: 4.3gPb(CH 3 COO) 2 , 1.5g of thiourea, 0.8g of bismuth nitrate and 10mL of ethylene glycol were dissolved in 40mL of deionized water. After stirring evenly, the solution was poured into a polytetrafluoroethylene reactor, put into an oven for 24 hours, and the oven was opened to cool naturally to room temperature, then centrifugally wash and filter with distilled water and alcohol, put the precipitate into an oven and dry at 60°C to obtain Bi 2 S 3 doped PbS powder; the resulting Bi 2 S 3 The doped PbS powder is sintered by spark plasma, and the SPS sintering parameters are as follows: Ar environment, 100°C / min heating rate, 45Mpa pressure at 450°C for 10min, to obtain doped 3wt% Bi 2 S 3 PbS thermoelectric material. After testing, at the test temperature of 773K, the power factor of the thermoelectric material is 6.7μWcm -1 k -2 , the thermoelectric figure of merit ZT is 0....

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Abstract

The invention relates to a Bi2S3-doped PbS thermoelectric material and a preparation method thereof. The Bi2S3 doping proportion in the thermoelectric material is 1-5.5wt%. The preparation method is that a hydrothermal method is used for synthesizing Bi2S3-doped PbS powder, and the thermoelectric material is obtained through spark plasma sintering (SPS). The thermoelectric material obtained by the preparation method is characterized in that the seebeck coefficient absolute value is reduced, the conductivity is increased, the thermal conductivity is reduced, the thermoelectric figure of merit ZT is increased, and the thermoelectric property is effectively improved.

Description

technical field [0001] The invention provides a Bi 2 S 3 A doped PbS thermoelectric material and a preparation method thereof relate to the technical field of thermoelectric materials. Background technique [0002] Among thermoelectric materials, PbS is considered to be the most ideal material to replace PbTe due to its stable structure, cheap price, abundant reserves on earth, and excellent thermoelectric properties. It has been reported in the literature that PbS is doped with an appropriate amount of Bi by melting method. 2 S 3 Finally, the lattice thermal conductivity of the material can be reduced and the thermoelectric performance of the material can be improved. However, the melting method requires high temperature conditions, and its equipment requirements are relatively high, the production process is relatively complicated, the cost is high, the cycle is long, and it is difficult to carry out large-scale production. Contents of the invention [0003] For abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/16C04B35/547C04B35/622H10N10/852
CPCC04B35/547C04B35/622H10N10/852
Inventor 不公告发明人
Owner 涂艳丽
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