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Block thermoelectric material

A thermoelectric material and block technology, applied in the direction of thermoelectric device junction lead wire materials, etc., can solve the problems of unenvironmental protection, low performance, small size, etc., and achieve the effect of wide power generation temperature

Inactive Publication Date: 2013-06-12
何琴玉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the PbTe system contains lead and is not environmentally friendly
However, the preparation cost of the thin film is high and the volume is small, so it is not suitable for power generation.
The research team of Shanghai Institute of Silicon Research has reported that Cu2-xSe (02- The performance of xSe (0≤x≤0.25) is lower

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] The chemical formula of the thermoelectric material of the present invention is Cu 1.94 Al 0.02 Se 0.9 o 0.1 The thermoelectric material has a ZT value between 2.12-2.52 at 580°C-680°C, such as figure 1 shown.

Embodiment 2

[0028] The chemical formula of the thermoelectric material of the present invention is Cu 1.8 Ni 0.1 Se 0.925 N 0.05 The thermoelectric material has a ZT value between 2-2.17 at 580°C-680°C, such as figure 2 shown.

Embodiment 3

[0030] The chemical formula of the thermoelectric material of the present invention is Cu 1.76 co 0.12 Se 0.895 N 0.07 , the ZT value of the thermoelectric material is between 2.08-2.53 at 580°C-680°C, such as image 3 shown.

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Abstract

The invention relates to block thermoelectric material. The chemical formula of the thermoelectric material is (Cu2-xHAx) (Sel-y (L / 2)My), wherein x<=0.15, 0<=y<=0.1, H is the valence of the element A, L is the valence of the element M, the element A is any one of Al, Mn, Co, Ni, Ga, Mo, W, Zr and Nb, and the element M is any one of N and Si. The performance factor ZT of the thermoelectric material is 2-3 at the temperature of 580-680 DEG C. By certain fabrication processing of the thermoelectric material, the block material can be obtained, wherein the performance factor ZT of the block material is 2-3 at the temperature of 580-680 DEG C, and the block material is suitable for business application. As everyone knows, improvement of the performance factor ZT of the thermoelectric material by 0.4 is great performance, moreover the performance factor ZT is improved by 1.4 to the greatest extent, and the working temperature range is as wide as 100 DEG C. The thermoelectric properties of the thermoelectric material already reaches the requirements of the business application, the performance factor ZT is 2-3 at the temperature of 580-680 DEG C, and the range of electricity generating temperature is wide.

Description

technical field [0001] The invention is a thermoelectric material, especially a block thermoelectric material suitable for use in the fields of industrial waste heat, automobile waste heat and solar thermal power generation, and belongs to the innovative technology of block thermoelectric materials. Background technique [0002] As a material that can directly convert thermal energy into electrical energy, thermoelectric materials can be used for waste heat utilization, and can also convert sunlight into heat and then generate electricity, that is, the "solar-thermal-electric" power generation method (hereinafter referred to as "solar thermal energy") ). Solar thermal photovoltaics can concentrate sunlight on thermoelectric materials with a small area and volume to generate high-temperature power generation through cheap reflective materials, reducing the amount of thermoelectric materials and reducing the cost of power generation. On the other hand, the conversion efficien...

Claims

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Application Information

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IPC IPC(8): H01L35/22
Inventor 何琴玉钟斌张勇
Owner 何琴玉
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