Preparation method of SiGe alloy thermoelectric material

A technology of thermoelectric materials and alloys, applied in the field of preparation of SiGe alloy thermoelectric materials, can solve the problems of low mutual diffusion speed, volatilization of doping elements, easy volatilization, etc., and achieves easy control of process parameters, excellent thermoelectric performance, and simple preparation method. Effect
CN101736172AInactive Publication Date: 2010-06-16WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2010-06-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of a SiGe alloy thermoelectric material. The preparation method of the SiGe alloy thermoelectric material is characterized by comprising the following steps of: (1) weighing high-purity Si blocks, high-purity Ge blocks and dopants as raw materials according to a chemical formula Si80Ge20X0-3, wherein X in the chemical formula stands for elements of the dopants; mixing the high-purity Si blocks, the high-purity Ge blocks and the dopants, then melting for 2 to 3 times with 30s each time in an argon arc melting furnace to obtain an alloy block body; (2) grinding and crushing the alloy block body obtained in the step (1), then ball-milling for 1 to 2h in a ball mill by taking alcohol as a ball-milling process controlling agent, and drying to obtain alloy powder; and (3) carrying out electro-discharging plasma sintering on the alloy powder obtained in the step (2) to obtain compact and blocky SiGe alloy thermoelectric material. The invention has the advantages of simple process, short preparation time, easily-controlled process parameters and high performance of the prepared material.
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Description

technical field

[0001] The invention belongs to the technical field of new energy materials, and in particular relates to a preparation method of a SiGe alloy thermoelectric material. Background technique

[0002] Thermoelectric power generation is a fully static direct power generation method that uses thermoelectric conversion materials to directly 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. , The field of microelectronics plays an important role. With the increasingly prominent energy and environmental issues, thermoelectric batteries, as a green energy technology with a wide range of adaptability and environmental protection, have attracted more and more attention.

[0003] SiGe alloy is currently a relatively mature high-temperature thermoelectric material. It is used at high temperatures above 700K. At 1200K, its dimensionless thermo...

Claims

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