Method for forming bismuth telluride based thermoelectric material through 3D printing

Abstract

The invention discloses a method for forming a bismuth telluride based thermoelectric material through 3D printing. The method includes following steps: preparing bismuth telluride / epoxy resin 3D printing mixed powder, performing 3D printing forming on a blocky thermoelectric material sample, and performing thermal treatment on the blocky thermoelectric material sample. The method is simple in process, high in forming accuracy, high in material utilization rate and capable of quickly preparing the Bi2Te3 based thermoelectric material with high performance; selective laser sintering 3D printingtechnology is utilized, so that heating speed and cooling rate are high, and grain structure can be refined; compared with other preparation methods, the method has the advantages of being short in preparation time, high in sintering efficiency and pollution-free in the process of sintering; by adopting the technology for Bi2Te3 based thermoelectric material powder forming, the defects of conventional processing methods are overcome, and workpiece quality and efficiency are improved, so that industrial application of thermoelectric devices is promoted.

Description

technical field

[0001] The invention belongs to the field of new technology for forming thermoelectric materials, and in particular relates to a method for 3D printing and forming bismuth telluride-based thermoelectric materials. Background technique

[0002] Thermoelectric materials, also known as energy conversion materials or thermoelectric materials, are a new functional material that directly converts thermal energy and electrical energy. It integrates two functions in one, and the thermoelectric generator made of it can directly convert heat energy into electric energy, and it can also be made into a thermoelectric refrigerator to use electric energy for direct cooling. Because its application does not require the use of transmission parts, there is no noise and no waste during operation, the material performance is reliable, and the service life is long. It is an environmentally friendly material with wide application prospects. With the continuous progress of human ...

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