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An Ag-Doped Cubic Phase Ca2Si Thermoelectric Material

A technology of thermoelectric materials and cubic phase, which is applied in the direction of thermoelectric device junction lead-out materials, thermoelectric device manufacturing/processing, etc., can solve the problems that thermoelectric materials have not been reported, and meet the needs of large-scale production, composition controllable, The effect of low reaction temperature

Inactive Publication Date: 2018-04-13
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • An Ag-Doped Cubic Phase Ca2Si Thermoelectric Material
  • An Ag-Doped Cubic Phase Ca2Si Thermoelectric Material
  • An Ag-Doped Cubic Phase Ca2Si Thermoelectric Material

Examples

Experimental program
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Effect test

Embodiment 1

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

[0025] 1) Mix Ca powder, Si powder and Ag powder uniformly under the protective atmosphere of Ar gas according to the molar ratio of Ca, Si and Ag of 81:20:0.5 to obtain the 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 rea...

Embodiment 2

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

[0031] 1) Mix Ca powder, Si powder and Ag powder uniformly in an Ar gas protective atmosphere at a molar ratio of Ca, Si and Ag of 81:20:10 to obtain a 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 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;

[0033] 3) Put the vacuum stainless steel ball mill tank prepared in step 2) into the ball mill, and mill at a speed of 1000 rpm for 50 hours to fully react the mixture powder;

...

Embodiment 3

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

[0039]1) Mix Ca powder, Si powder and Ag powder according to the molar ratio of Ca, Si and Ag as 81:20:6 under the protective atmosphere of Ar gas to obtain the 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 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;

[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 500 rpm for 100 hours to fully react the mixt...

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Abstract

The invention discloses an Ag-doped cubic phase Ca2Si thermoelectric material. After uniformly mixing Ca powder, Si powder and Ag powder in an Ar gas protective atmosphere, the obtained mixture powder and grinding steel balls are placed in an Ar gas protective atmosphere. Put it into a vacuum stainless steel ball mill jar and seal it, and after the ball mill reaction, use plasma sintering to vacuum sinter and press the tablet to obtain a sheet-like Ag-doped cubic phase Ca2Si thermoelectric material. Since Ag element has similar properties to alkaline earth metals, when Ag element is added, it is easy to replace the Ca site, doped as a donor, and provides conductive electrons as carriers, thereby improving the electrical conductivity and thermoelectric properties of the material. The invention has the advantages of simple process, easy operation, low cost, etc., and the obtained Ag-doped cubic phase Ca2Si thermoelectric material has high purity, tight combination, and good industrialization prospect.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric functional materials, in particular to an Ag-doped cubic phase Ca 2 Si thermoelectric material. Background technique [0002] Thermoelectric materials are green and environmentally friendly functional materials that can realize direct mutual conversion of thermal energy and electrical energy; thermoelectric devices can realize mutual conversion between thermal energy and electrical 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 than ten years. They can be widely used in waste heat power generation , Refrigerator refrigeration and other important...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/14H01L35/34H10N10/851H10N10/01
CPCH10N10/851H10N10/01
Inventor 温翠莲熊锐萨百晟裘依梅林逵洪云
Owner FUZHOU UNIV
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