High-performance thermoelectric composite material and preparation method thereof

A composite material and thermoelectric technology, which is applied in the direction of thermoelectric device lead-out wire materials, thermoelectric device manufacturing/processing, etc., can solve the problems of low thermoelectric performance and low mechanical strength at high temperature end, so as to improve thermoelectric performance and reduce crystal lattice Thermal conductivity, effect of improving process workability
CN102339946AActive Publication Date: 2012-02-01中科西卡思(苏州)科技发展有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中科西卡思(苏州)科技发展有限公司
Publication Date
2012-02-01

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Abstract

The invention relates to a high-performance thermoelectric composite material and a preparation method thereof, belonging to the field of thermoelectric materials. The composite material consists of two phases. A first phase is n-type Bi2Te3-Bi2Se3 or p-type Bi2Te3-Sb2Te3, and a second phase is nanometer powder of a metallic oxide. The nanometer powder of the metallic oxide accounts for 0.05-10% in terms of the total weight of the thermoelectric composite material. According to the preparation method provided by the invention, the n-type Bi2Te3-Bi2Se3 or p-type Bi2Te3-Sb2Te3 powder is ultrasonically mixed with the nanometer oxide, and discharge plasma sintering is carried out on the mixture to obtain a dense block material. Compared with the bismuth-telluride-based thermoelectric base material, under the condition that the electric conductivity of the thermoelectric base material is maintained to be unchanged basically in the invention, the high-performance thermoelectric composite material, provided by the invention, achieves the advantages of obviously reduced lattice heat conductivity and increased Seeback coefficient, and therefore the thermoelectric performance of the material can be greatly improved.
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Description

technical field

[0001] The invention relates to a high-performance thermoelectric composite material and a preparation method thereof, belonging to the field of thermoelectric materials. Background technique

[0002] Thermoelectric conversion technology is a technology that uses the Seebeck effect of materials to directly convert heat energy into electrical energy, or uses the Peltier effect of materials for refrigeration. It has no moving parts, high reliability, long life, Environmentally friendly and other characteristics, it can be widely used in waste heat power generation, aerospace, military equipment, home appliances and other fields. The thermoelectric conversion efficiency mainly depends on the dimensionless thermoelectric performance factor ZT of the material (ZT=S 2 σT / κ, where S is the Seebeck coefficient, σ is the electrical conductivity, κ is the thermal conductivity, and T is the absolute temperature). The higher the ZT value of the material, the higher the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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