Preparing process for high thermoelectric properties BiTe material

A technology of thermoelectric performance and base material, which is applied in the field of preparation of BiTe materials with high thermoelectric performance to achieve the effect of improving thermoelectric performance

Inactive Publication Date: 2008-06-18
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The BiTe material prepared by the known powder metallurgy method can not meet the needs of the technical field that requires high thermoelectric performance.

Method used

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  • Preparing process for high thermoelectric properties BiTe material
  • Preparing process for high thermoelectric properties BiTe material

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: get ready to process the plastic mold with enough big space with graphite, select Bi for use m Sb 1-m Te 3 A series of alloy powders are sintered to prepare BiTe thermoelectric materials; put the BiTe thermoelectric materials into the center of the prepared shaping mold to ensure that the cross-sectional area of ​​the material in the shaping mold after shaping is equal to the cross-sectional area of ​​the material in the vertical pressure direction before shaping The ratio is 1:0.2-0.8; place a layer of spacers on the top and bottom of the BiTe material in the shaping mold to prevent the BiTe material from sticking to the shaping mold after shaping; put the shaping mold with the material into the hot pressing equipment , vacuumize and inflate the furnace for washing; heat the material to 400-550°C, apply a pressure of 30-700MPa, and keep it for 3-7 hours for shaping treatment; then keep the shaped material at a temperature of 150-350°C Anneal for 6 hours...

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Abstract

The invention relates to the preparation method of a high thermoelectricity BiTe material, which is characterized in that the invention comprises the following preparation steps: 1) select Bi element-containing and Te element-containing powder to sinter and prepare BiTe base materials; 2) put the prepared materials into the center of the moulding die; 3) put the die with prepared material into hot pressing device, making vacuum pumping, air inflating and prepurging treatment; 4) heat the material up to 300 to 570 DEG C, exert 20 to 80 MPa pressure, and keep for 1.5 to 10h, then execute moulding treatment; 5) preserve the molded material for 2 to 10h for annealing treatment at the temperature of 150 to 450 DEG C, then the high thermoelectricity BiTe material is obtained after being taken out. Because the moulding treatment is adopted, the thermoelectricity performance of BiTe is improved, thereby laying a good foundation for preparing the thermoelectric generator with long service life and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric materials, in particular to a preparation method of a BiTe material with high thermoelectric performance. Background technique [0002] At present, the BiTe-based alloy thermoelectric material is the thermoelectric material with the best performance for low-temperature power generation, and has a wide range of applications in the fields of radioisotope thermoelectric generators, industrial and transport vehicle waste heat power generation. [0003] BiTe-based material is an anisotropic thermoelectric material, and its advantages can only be brought into play if it is used in the direction with better thermoelectric properties. BiTe materials prepared by known powder metallurgy methods cannot meet the needs of technical fields that require high thermoelectric performance. Contents of the invention [0004] In order to solve the problems existing in the prior art, the invention provides a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16H01L35/34
Inventor 张丽丽张建中王泽深任保国
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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