N-type pbse-pbs based thermoelectric material and preparation method thereof

A thermoelectric material, n-type technology, applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, etc., can solve problems such as difficulty in individual regulation and control

Active Publication Date: 2020-10-30
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the expression that in order to improve the thermoelectric conversion efficiency of materials, materials with high S and σ values ​​and low κ values ​​should be selected, but these three physical parameters are mutually restricted, and it is difficult to control them individually

Method used

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  • N-type pbse-pbs based thermoelectric material and preparation method thereof
  • N-type pbse-pbs based thermoelectric material and preparation method thereof
  • N-type pbse-pbs based thermoelectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, an n-type PbSe-PbS based thermoelectric material, the chemical formula of which is PbSe 0.7 S 0.3 Cu x , x are 0, 0.005, 0.01, 0.012, 0.014, 0.016, 0.018 respectively, that is, in this embodiment, an n-type PbSe-PbS based thermoelectric material has the chemical formula PbSe 0.7 S 0.3 , PbSe 0.7 S 0.3 Cu 0.005 , PbSe 0.7 S 0.3 Cu 0.01 , PbSe 0.7 S 0.3 Cu 0.012 , PbSe 0.7 S 0.3 Cu 0.014 , PbSe 0.7 S 0.3 Cu 0.016 , PbSe 0.7 S 0.3 Cu 0.018 a series of materials.

[0033] In this embodiment, a method for preparing an n-type PbSe-PbS-based thermoelectric material includes the following steps:

[0034] a. In a glove box filled with Ar gas, use Pb grains, Se powder, S powder and Cu powder with a purity of 99.99% as raw materials, and prepare the target material according to the chemical formula PbSe 0.7 S 0.3 Cu x Weigh 6g of each raw material component in total, prepare the raw materials with Pb, Se, S and Cu in a molar ratio of 1:0.7...

Embodiment 2

[0044] This embodiment is basically the same as Embodiment 1, especially in that:

[0045] In this embodiment, an n-type PbSe-PbS based thermoelectric material, the chemical formula of which is PbSe 0.7 S 0.3 Cu x , x are 0, 0.005, 0.01, 0.012, 0.014, 0.016, 0.018 respectively, that is, in this embodiment, an n-type PbSe-PbS based thermoelectric material has the chemical formula PbSe 0.7 S 0.3 , PbSe 0.7 S 0.3 Cu 0.005 , PbSe 0.7 S 0.3 Cu 0.01 , PbSe 0.7 S 0.3 Cu 0.012 , PbSe 0.7 S 0.3Cu 0.014 , PbSe 0.7 S 0.3 Cu 0.016 , PbSe 0.7 S 0.3 Cu 0.018 a series of materials. The n-type PbSe-PbS based thermoelectric material of this embodiment is the same as that of Embodiment 1, only the process conditions of the preparation method are different.

[0046] In this embodiment, a method for preparing an n-type PbSe-PbS-based thermoelectric material includes the following steps:

[0047] a. This step is the same as in Embodiment 1;

[0048] b. This step is the same...

Embodiment 3

[0053] This embodiment is basically the same as the previous embodiment, and the special features are:

[0054] In this embodiment, an n-type PbSe-PbS based thermoelectric material, the chemical formula of which is PbSe 0.7 S 0.3 Cu x , x are 0, 0.005, 0.01, 0.012, 0.014, 0.016, 0.018 respectively, that is, in this embodiment, an n-type PbSe-PbS based thermoelectric material has the chemical formula PbSe 0.7 S 0.3 , PbSe 0.7 S 0.3 Cu 0.005 , PbSe 0.7 S 0.3 Cu 0.01 , PbSe 0.7 S 0.3 Cu 0.012 , PbSe 0.7 S 0.3 Cu 0.014 , PbSe 0.7 S 0.3 Cu 0.016 , PbSe 0.7 S 0.3 Cu 0.018 a series of materials. The n-type PbSe-PbS based thermoelectric material of this embodiment is the same as that of Embodiment 1, only the process conditions of the preparation method are different.

[0055] In this embodiment, a method for preparing an n-type PbSe-PbS-based thermoelectric material includes the following steps:

[0056] a. This step is the same as in Embodiment 1;

[0057] b....

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Abstract

The invention discloses an n-type PbSe-PbS-based thermoelectric material and a preparation method thereof. The preparation method of the present invention comprises the following steps: firstly take Pb particles, Se powder, S powder and Cu powder and mix uniformly; then package the mixed sample in a vacuum quartz glass tube; then place the quartz tube in a vertical tube furnace for sintering ; Finally, the obtained ingot is ground into a fine powder, and then vacuum hot-pressed and sintered into a regular block. The n-type thermoelectric material prepared by the invention has very high thermoelectric performance, and its thermoelectric figure of merit is as high as 1.74. The present invention improves the thermoelectric properties of n-type PbSe-PbS-based thermoelectric materials through batching process, melting and casting process, and sintering process, and prepares novel n-type PbSe-PbS-based thermoelectric materials with ideal thermoelectric conversion efficiency for the future realization of no-transmission parts, Noiseless, pollution-free, reliable and stable thermal energy conversion is the foundation. The method of the invention has simple process, easy control and low cost.

Description

technical field [0001] The invention relates to an N-type thermoelectric material and a preparation method thereof, in particular to an N-type lead compound-based thermoelectric material and a preparation method thereof, which are applied in the technical field of functional thermoelectric materials. Background technique [0002] With the excessive consumption of traditional fossil fuels such as coal and oil, energy and environmental issues have become the most severe challenges facing mankind. Thermoelectric materials have received great attention as a green energy material. [0003] Thermoelectric materials are functional materials that utilize the movement of carriers inside solids to directly convert heat and electricity. The thermoelectric device made of it has the advantages of small size, light weight, no noise, wide temperature control range and high precision, long service life, and no pollution to the environment. These advantages make thermoelectric materials a n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/16H01L35/34
CPCH10N10/852H10N10/01
Inventor 骆军欧阳路张继业王晨阳
Owner SHANGHAI UNIV
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