Rapid preparation of high performance nanostructured filling type skutterudite thermoelectric material

A technology of nanostructured and thermoelectric materials, applied in the field of preparation of thermoelectric compounds, can solve the problems of high energy consumption, unsatisfactory thermoelectric performance, no major breakthroughs, etc., to save annealing time, reduce preparation cost, and shorten reaction time. Effect

Inactive Publication Date: 2009-05-20
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional SSR method takes a long time to prepare, generally takes 7 to 10 days, consumes a lot of time and energy, and has no major breakthrough in performance in recent years
Other chemical methods such as CC and SG methods can obtain nanopowders with fine grain size, but

Method used

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  • Rapid preparation of high performance nanostructured filling type skutterudite thermoelectric material
  • Rapid preparation of high performance nanostructured filling type skutterudite thermoelectric material
  • Rapid preparation of high performance nanostructured filling type skutterudite thermoelectric material

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Embodiment 1

[0023] Such as figure 1 Shown, the rapid preparation method of high-performance nanostructure filled skutterudite thermoelectric material, it comprises the following steps:

[0024] 1) Ingredients: Using granular Yb, granular Co and granular Sb as starting materials, the reaction raw materials are formulated according to the chemical formula Yb 0.3 co 4 Sb 12.3 Weigh; Wherein, the purity of granular Yb is 99.98% (mass), the purity of granular Co is 99.99% (mass), and the purity of granular Sb is 99.9999% (mass);

[0025] 2) Preparation of master alloy: Mix granular Yb, granular Co and granular Sb, then put them into a melting furnace, slowly heat to 1100°C at a heating rate of 2°C / min, and melt for 20 to 30 hours (in this range All have the ability to realize the present invention, such as 20h or 30h), to obtain a melt; the melt is quenched in supersaturated brine to obtain a master alloy (ingot with dense metallic luster);

[0026] 3) Preparation of strip-shaped products:...

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PUM

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Abstract

The invention relates to a preparing method of thermoelectric compound, in particular to a fast preparing method of filled type skutterudite thermoelectric material with high performance nanostructure. The invention is characterized in that the method comprises the following steps: 1) batching: granular Yb, granular Co and granular Sb are used as starting materials and weighed according to the chemical formula Yb0.3Co4Sb12.3; 2) preparing master alloy: the granular Yb, the granular Co and the granular Sb are mixed, then put into a melting furnace, heated slowly to 1100 DEG C by adopting rate of temperature increase of 2 DEG C/min and melted for 20 to 30h so as to obtain melt; the melt is quenched in supersaturated salt water so as to obtain the master alloy; 3) the master alloy is carried out cleaning processing, placed in an induction heating furnace to be melted to melt and then rotatablely throws the melt so as to obtain a strap product with an amorphous/nanocrystalline composite structure; and 4) the strap product with the amorphous/nanocrystalline composite structure is ground, tableted and then sintered by using discharging plasma so as to obtain filled type skutterudite thermoelectric material with high performance nanostructure. The method has short preparation period, low energy consumption, simple and easy-control technique, safety and no pollution.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a preparation method of a thermoelectric compound. Background technique [0002] Thermoelectric power generation is a fully static direct power generation method that uses thermoelectric conversion materials to convert heat energy into electrical energy. It has the advantages of compact structure, reliable performance, no noise during operation, no wear, no leakage, and flexible movement. It can generate potential, which plays an important role in the fields of military, aerospace, medicine, and microelectronics. As energy and environmental issues become increasingly prominent, thermoelectric batteries, as a green energy technology with a wide range of adaptability and environmental protection, have attracted more and more attention. focus on. [0003] Filled skutterudite (skutterudite) compound exhibits the thermoelectric transport characteristics of electron cry...

Claims

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Application Information

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IPC IPC(8): C22C1/04B22D11/06B22F3/105
Inventor 唐新峰李涵张清杰
Owner WUHAN UNIV OF TECH
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