Graphene compounded with stibine cobalt base skutterudite thermoelectric material and preparation method of material

A technology for compounding cobalt antimonide-based and thermoelectric materials, which is applied in the direction of thermoelectric device node lead-out materials, thermoelectric device manufacturing/processing, etc., and can solve the problems of long preparation cycle, high energy consumption, and unsuitability for industrialized large-scale production. , to achieve the effect of short preparation time, good repeatability and good industrialization prospects

Active Publication Date: 2013-02-13
JIANGSU CNANO TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional solid-state reaction method needs 7-10 days of annealing, the preparation cycle is long and the energy consumption is high, so it is not suitable for industrial large-scale production

Method used

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  • Graphene compounded with stibine cobalt base skutterudite thermoelectric material and preparation method of material
  • Graphene compounded with stibine cobalt base skutterudite thermoelectric material and preparation method of material
  • Graphene compounded with stibine cobalt base skutterudite thermoelectric material and preparation method of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Using high-purity (>99%) granular metal elemental ytterbium (Yb) powder, cobalt (Co) powder, and antimony (Sb) powder as initial raw materials, according to the chemical formula M x co 4 Sb 12 (M=Yb; X=0.35) is Yb 0.35 co 4 Sb 12 The stoichiometric ratio batching, weighs the powder that total amount is about 12g.

[0027] Put the above powder and 0.05g of carbon nanotubes into a stainless steel ball mill jar, and add three kinds of stainless steel balls with different diameters (the mass ratio of grinding balls to powder is 13:1), vacuumize and pass Ar inert gas protection in the glove box Finally, seal it, and then put the ball mill jar into a high-energy ball mill for ball milling at a speed of 350 rpm for 18 hours to obtain alloy powder.

[0028] The obtained alloy powder is loaded into a graphite mold, and then put into a spark plasma sintering device for sintering under an Ar atmosphere. The sintering temperature is 550° C., the holding time is 5 minutes, the...

Embodiment 2

[0033] Using high-purity (>99%) granular metallic elemental barium (Ba) powder, cobalt (Co) powder, and antimony (Sb) powder as initial raw materials, according to the chemical formula Ba x co 4 Sb 12 (M=Ba; X=0.8) that is Ba 0.8 co 4 Sb 12 The stoichiometric ratio batching, weighs the powder that total amount is about 12g.

[0034] Put the above powder and 0.1g carbon nanotubes into a stainless steel ball mill jar, and add three kinds of stainless steel balls with different diameters (mass ratio of grinding ball to powder is 13:1), vacuumize and pass Ar inert gas protection in the glove box Finally, seal it, then put the ball mill jar into a high-energy ball mill for ball milling, and ball mill it for 12 hours at a speed of 350 rpm to obtain alloy powder.

[0035] The obtained alloy powder is loaded into a graphite mold, and then put into a spark plasma sintering device for sintering under an Ar atmosphere. The sintering temperature is 600° C., the holding time is 5 min...

Embodiment 3

[0038] Using high-purity (>99%) granular metal elemental lithium (Li) powder, cobalt (Co) powder, and antimony (Sb) powder as initial raw materials, according to the chemical formula M x co 4 Sb 12 (M=Li; X=0.4) namely Li 0.4 co 4 Sb 12 The stoichiometric ratio batching, weighs the powder that total amount is about 12g.

[0039] Put the above powder and 0.05g of carbon nanotubes into a stainless steel ball mill jar, and add three kinds of stainless steel balls with different diameters (the mass ratio of grinding balls to powder is 13:1), vacuumize and pass Ar inert gas protection in the glove box Finally, seal it, and then put the ball mill jar into a high-energy ball mill for ball milling, and ball mill it for 9 hours at a speed of 350 rpm to obtain alloy powder.

[0040]The obtained alloy powder is loaded into a graphite mold, and then put into a spark plasma sintering device for sintering under an Ar atmosphere. The sintering temperature is 650° C., the holding time i...

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Abstract

The invention relates to a graphene compounded with stibine cobalt base skutterudite thermoelectric material and a preparation method of the graphene compounded with stibine cobalt base skutterudite thermoelectric material. The chemical general expression of the material is MxCo 4 Sb 12/graphene, wherein x is greater than or equal to 0 and less than or equal to 1, M is one of a rare earth element, alkali earth metal, alkali metal, Ga and Tl, and the content of the graphite olefine is less than 3%. The preparation method comprises the following steps of: (1) weighing M, cobalt and antimony, then mixing with a carbon nanometer pipe, and carrying out ball milling under inert gas shielding; and (2) placing the obtained substances in a graphite jig, and carrying out discharge plasma sintering under the inert gas shielding, thus obtaining the graphene compounded with stibine cobalt base skutterudite thermoelectric material. The graphene compounded with stibine cobalt base skutterudite thermoelectric material and the preparation method of the graphene compounded with stibine cobalt base skutterudite thermoelectric material have the advantages of simple preparation technology, short preparation time, easiness in control, good repeatability, low cost and good industrialization prospect; and the obtained material has a good pyroelectricity property.

Description

technical field [0001] The invention belongs to the field of thermoelectric materials and preparation thereof, in particular to a graphene composite cobalt antimonide-based skutterudite thermoelectric material and a preparation method thereof. Background technique [0002] Thermoelectric conversion technology is a technology that uses the Seebeck effect and Peltier effect of semiconductor materials to directly convert energy between each other. The conversion efficiency mainly depends on the dimensionless performance index ZT value of the material (ZT=α 2 σT / κ, where α is the Seebeck coefficient; σ is the electrical conductivity; T is the absolute temperature; κ is the thermal conductivity). The higher the ZT value of the material, the higher the hot spot conversion efficiency. The original device made of thermoelectric material has the characteristics of small size, high reliability, long life, simple manufacturing process, and environmental friendliness, so it is expected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/14H01L35/34C22C1/05
Inventor 王连军董媛王明辉江莞
Owner JIANGSU CNANO TECHNOLOGY CO LTD
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