A method for efficiently preparing skutterudite thermoelectric materials by laser

A technology of thermoelectric materials and skutterudite, which is applied in the field of efficient preparation of skutterudite thermoelectric materials, can solve problems such as the difficulty in accurately controlling the composition content of the final block sample, fluctuations in material performance, and volatilization of large Sb phases, and shorten the preparation cycle , low equipment requirements, and the effect of reducing preparation costs
CN106191522BActive Publication Date: 2017-11-10SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Publication Date
2017-11-10

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Abstract

The invention relates to a method for efficiently preparing a skutterudite thermoelectric material by laser, comprising: 1) according to the chemical formula of the skutterudite thermoelectric material, weighing elemental metal powder as a raw material powder, uniformly mixing and placing it in a graphite matrix; 2) Place the graphite matrix containing the raw material powder in an inert atmosphere, and use laser melting technology to heat the raw material powder. With the movement of the laser spot, the raw material powder is melted and then condensed to obtain an ingot; 3) Prepare in step 2) The ingot is ground into powder, and the ingot powder is sintered by spark plasma to obtain the skutterudite thermoelectric material. The invention utilizes a high-energy laser to heat local powder to realize rapid melting and reduce the loss of Sb phase, and then rapidly condenses the small-capacity melt to reduce the segregation size. Subsequent combined with the SPS short-time heat treatment process, the efficient preparation of skutterudite thermoelectric materials is realized.
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Description

technical field

[0001] The invention belongs to the field of new energy materials and relates to a method for efficiently preparing skutterudite thermoelectric materials. Background technique

[0002] Thermoelectric power generation technology uses the Seebeck effect of semiconductor materials to directly convert heat energy into electrical energy. It has the characteristics of small system size, compact structure, no moving parts, maintenance-free, no noise, no emissions, high reliability and long life. The detection power supply and special military power supply have obtained important applications, and have broad application prospects and potential economic and social benefits in solar photoelectric-thermoelectric compound power generation, industrial waste heat—especially in the thermoelectric power generation of automobile exhaust waste heat recovery, and may become today's An important part of the solution to the world's energy crisis (Science 283:804, 1999).

[0003] ...

Claims

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