Cu-doped cubic phase Ca2Si thermoelectric material

A thermoelectric material and cubic phase technology, which is applied in the directions of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, metal silicide, etc. The effect of cost reduction and low reaction temperature

Inactive Publication Date: 2016-11-09
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, regarding Cu-doped cubic Ca 2 Si thermoelectric materials are still almost unreported

Method used

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  • Cu-doped cubic phase Ca2Si thermoelectric material
  • Cu-doped cubic phase Ca2Si thermoelectric material
  • Cu-doped cubic phase Ca2Si thermoelectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A Cu-doped cubic Ca phase 2 The preparation method of Si thermoelectric material comprises the following steps:

[0025] 1) Mix Ca powder, Si powder and Cu powder uniformly under an Ar gas protective atmosphere at a molar ratio of Ca, Si and Cu of 81:20:0.5 to obtain a mixture powder;

[0026] 2) Put the mixture powder obtained in step 1), grinding steel balls, vacuum stainless steel ball milling tank and electronic balance into a glove box filled with Ar gas at an atmospheric pressure; accurately weigh the grinding steel balls in the glove box at a weight ratio of 3:1 and the mixture powder, and put it into a vacuum stainless steel ball mill jar, then seal the vacuum stainless steel ball mill jar to avoid oxygen entry; then take out the vacuum stainless steel ball mill jar from the glove box;

[0027] 3) Put the vacuum stainless steel ball mill tank prepared in step 2) into the ball mill, and ball mill at a speed of 2000 rpm for 5 hours to fully react the mixture powd...

Embodiment 2

[0030] A Cu-doped cubic Ca phase 2 The preparation method of Si thermoelectric material comprises the following steps:

[0031] 1) Mix Ca powder, Si powder and Cu powder uniformly under the protective atmosphere of Ar gas according to the molar ratio of Ca, Si and Cu of 81:20:6 to obtain the mixture powder;

[0032] 2) Put the mixture powder obtained in step 1), grinding steel balls, vacuum stainless steel ball milling tank and electronic balance into a glove box filled with Ar gas at an atmospheric pressure; accurately weigh the grinding steel balls in the glove box according to a weight ratio of 16:1 and the mixture powder, and put it into a vacuum stainless steel ball mill jar, then seal the vacuum stainless steel ball mill jar to avoid oxygen entry; then take out the vacuum stainless steel ball mill jar from the glove box;

[0033] 3) Put the vacuum stainless steel ball mill tank prepared in step 2) into the ball mill, and ball mill at a speed of 500 rpm for 100 h to full...

Embodiment 3

[0038] A Cu-doped cubic Ca phase 2The preparation method of Si thermoelectric material comprises the following steps:

[0039] 1) Mix Ca powder, Si powder and Cu powder uniformly in an Ar gas protective atmosphere at a molar ratio of Ca, Si and Cu of 81:20:10 to obtain a mixture powder;

[0040] 2) Put the mixture powder obtained in step 1), grinding steel balls, vacuum stainless steel ball milling tank and electronic balance into a glove box filled with Ar gas at an atmospheric pressure; accurately weigh the grinding steel balls in the glove box at a weight ratio of 8:1 and the mixture powder, and put it into a vacuum stainless steel ball mill jar, then seal the vacuum stainless steel ball mill jar to avoid oxygen entry; then take out the vacuum stainless steel ball mill jar from the glove box;

[0041] 3) Put the vacuum stainless steel ball mill tank prepared in step 2) into the ball mill, and ball mill at a speed of 1000 rpm for 50 h to fully react the mixture powder;

[...

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Abstract

The invention discloses a Cu-doped cubic phase Ca2Si thermoelectric material. A preparation method of the Cu-doped cubic phase Ca2Si thermoelectric material comprises the steps of: uniformly mixing Ca powder, Si powder and Cu powder under a protective atmosphere of Ar gas; then placing the obtained mixture powder and a grinding steel ball in a vacuum stainless steel ball mill jar under the protective atmosphere of Ar gas for sealing; and after a ball-milling reaction, carrying out vacuum sintering and tabletting on the sealed powder in a manner of plasma sintering to obtain a flaky Cu-doped cubic phase Ca2Si thermoelectric material. Because the Cu element has the characters similar with those of an alkaline-earth metal, after the Cu element is added and is used as donor doping, a Ca position is easily substituted, a conduction electron is provided to be used as a current carrier, thus the electric conductivity and the thermoelectric property of the material are improved. The Cu-doped cubic phase Ca2Si thermoelectric material has the advantages of simple process, easy operation, low cost and the like; and the obtained Cu-doped cubic phase Ca2Si thermoelectric material is high in purity, close in bonding and good in industrial prospect.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric functional materials, in particular to a Cu-doped cubic phase Ca 2 Si thermoelectric material. Background technique [0002] With the increasingly serious energy crisis, it is urgent to actively promote and promote the use of clean renewable energy, especially the combination of new technology development and industrialization investment in renewable energy to reduce the cost of renewable energy utilization. Thermoelectric devices can realize mutual conversion between thermal energy and electric energy, and are green and environmentally friendly energy devices with a wide range of applications. Semiconductor generators and refrigerators made of semiconductor thermoelectric power generation modules can generate electricity as long as there is a temperature difference, and can be used for cooling when supplying power. They work without noise and pollution, and have a service life of more tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/14H01L35/34C01B33/06
CPCC01B33/06H10N10/851H10N10/01
Inventor 温翠莲熊锐萨百晟裘依梅林逵洪云
Owner FUZHOU UNIV
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