Graphene/Cu2AX3 type thermoelectric composite material and preparation method thereof

A composite material, graphene technology, applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, etc., can solve problems such as reducing lattice thermal conductivity, achieve easy control of process parameters, good thermoelectric performance, Good prospects for the industry

Inactive Publication Date: 2014-09-17
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Copper-based Cu 2 AX 3 The compound (A is Sn or Ge, X is Se or Te) has a diamond-like structure, and due to its own lattice distortion, a large number of phonons are scattered, which greatly reduces the lattice thermal conductivity

Method used

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  • Graphene/Cu2AX3 type thermoelectric composite material and preparation method thereof
  • Graphene/Cu2AX3 type thermoelectric composite material and preparation method thereof
  • Graphene/Cu2AX3 type thermoelectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Use high-purity (99.9%) copper powder (Cu), tin powder (Sn) and selenium powder (Se) as the initial raw materials, and mix according to the stoichiometric ratio of 2:1:3, and weigh a total of about 20g of powder . Then weigh 0.2 g of fullerene, mix it with the above powder, put it into an agate mortar and grind it with alcohol for 30-50 minutes to 400-450 mesh, and dry it in the air. Put the dried powder into a stainless steel ball mill tank, and put 4 kinds of stainless steel balls with different diameters (the ratio of ball to material is 15:1), vacuumize and vent Ar gas in a vacuum glove box, seal it, and then ball mill Put the tank into a planetary ball mill for ball milling, the speed of the ball mill is 400 r / min, and the ball milling time is 48 hours, wherein the star-shaped ball mill is milled in the forward direction for 1 hour, and the stop interval is 15 minutes, and the reverse ball mill is 1 hour, and the stop interval is 15 minutes , reciprocating, the to...

Embodiment 2

[0041] Use high-purity (99.9%) copper powder (Cu), germanium powder (Ge) and selenium powder (Se) as the initial raw materials, and mix according to the stoichiometric ratio of 2:1:3, and weigh a total of about 20g of powder . Then weigh 0.25 g of fullerene, mix it with the above powder, put it into an agate mortar and grind it with alcohol for 30-50 minutes to 400-450 mesh, and dry it in the air. Put the dried powder into a stainless steel ball mill tank, and put 4 kinds of stainless steel balls with different diameters (the ratio of ball to material is 15:1), vacuumize and vent Ar gas in a vacuum glove box, seal it, and then ball mill Put the tank into a planetary ball mill for ball milling, the speed of the ball mill is 400 r / min, and the ball milling time is 48 hours, wherein the star-shaped ball mill is milled in the forward direction for 1 hour, and the stop interval is 15 minutes, and the reverse ball mill is 1 hour, and the stop interval is 15 minutes , reciprocating,...

Embodiment 3

[0045] Use high-purity (99.9%) copper powder (Cu), germanium powder (Ge) and tellurium powder (Te) as the initial raw materials, and mix according to the stoichiometric ratio of 2:1:3, and weigh a total of about 20g of powder . Then weigh 0.15 g of fullerene, mix it with the above powder, put it into an agate mortar and grind it with alcohol for 30-50 minutes to 400-450 mesh, and dry it in the air. Put the dried powder into a stainless steel ball mill tank, and put 4 kinds of stainless steel balls with different diameters (the ratio of ball to material is 15:1), vacuumize and vent Ar gas in a vacuum glove box, seal it, and then ball mill Put the tank into a planetary ball mill for ball milling, the speed of the ball mill is 400 r / min, and the ball milling time is 48 hours, wherein the star-shaped ball mill is milled in the forward direction for 1 hour, and the stop interval is 15 minutes, and the reverse ball mill is 1 hour, and the stop interval is 15 minutes , reciprocating...

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Abstract

The invention relates to a graphene / Cu2AX3 type thermoelectric composite material and a preparation method thereof. The chemical formula of the material is graphene / Cu2AX3, wherein the composite phase is grapheme of which the content is 0.5-5%, the matrix is Cu2AX3-type thermoelectric material with a diamond-like structure, A is Sn or Ge and X is Se or Te. The preparation method disclosed by the invention comprises the steps of preparing raw materials, and carrying out mechanical alloying, spark plasma sintering and the like. The method has the advantages of simple preparation process and good repeatability, can be put into the mass production and has good industrial prospects, and p-type graphene / Cu2AX3 type thermoelectric composite material prepared by the method has excellent thermoelectric properties.

Description

technical field [0001] The invention belongs to the field of thermoelectric materials and preparation, in particular to graphene / Cu 2 AX 3 thermoelectric composite material and its preparation method. Background technique [0002] Thermoelectric material is a functional material that directly converts thermal energy and electrical energy into each other. It uses its own Seebeck effect to directly convert thermal energy into electrical energy. It has the advantages of no noise, small size, high reliability, and no transmission parts. It is not only used in In addition to the aerospace field and space power supply, it also has great potential in waste heat power generation, automobile exhaust, geothermal and other fields. In the modern society where energy is increasingly scarce, the development of thermoelectric materials has received more and more attention. The conversion efficiency of thermoelectric materials greatly depends on the thermoelectric figure of merit ZT of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/00H01L35/14H01L35/34C22C1/10C22C1/05
Inventor 赵德刚左敏王振卿
Owner UNIV OF JINAN
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