Composite thermoelectric material for three-dimensional printing

A thermoelectric material and three-dimensional printing technology, applied in the field of 3D printing materials, can solve the problems of being easily broken or damaged, reducing the utilization rate of thermal energy of thermoelectric power generation devices, poor mechanical properties, etc., to achieve improved electrical conductivity, good electrical conductivity, toughness big effect

Active Publication Date: 2017-11-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing thermoelectric materials are mainly formed by cutting blocks, while the commonly used inorganic thermoelectric materials have poor mechanical properties and are brittle, and are easily broken or damaged during cutting, which affects their optimal performance in thermoelectric power generation devices.
Moreover, when thermoelectric devices are manufactured in traditional ways, due to the limitation of processing methods, there is a large space between each P-N junction, and a lot of heat will be conducted through the gaps, thus reducing the utilization rate of heat energy of thermoelectric power generation devices

Method used

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  • Composite thermoelectric material for three-dimensional printing
  • Composite thermoelectric material for three-dimensional printing
  • Composite thermoelectric material for three-dimensional printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment relates to a thermoelectric material for three-dimensional printing, including the following raw materials in parts by weight:

[0062] Bi 2 Te 2.75 Se 0.25 30g of powder, 0.7g of multi-walled carbon nanotubes, 0.36g of silane coupling agent KH570, 0.15g of plasticizer ATBC, 4.3g of PLA.

[0063] The preparation method of raw material described in the present embodiment comprises the steps:

[0064] 1) Mix KH570 and acetone at a volume ratio of 1:9 to obtain a 3.6mL mixed solution, and mix the mixed solution with Bi 2 Te 2.75 Se 0.25 The powder and the plasticizer ATBC are dissolved in 20-30mL of acetone, mixed and stirred evenly, and the speed of the magnetic stirrer is 400r / min. Sonicate at 40°C for 1 hour to volatilize the acetone, and dry the acetone quickly at 75°C on a hot plate to obtain a solid mixture when the acetone is volatilized to dry quickly;

[0065] 2) Transfer the above solid mixture to a mortar to grind and break up agglomerates...

Embodiment 2

[0069] This embodiment relates to a thermoelectric material for three-dimensional printing, including the following raw materials in parts by weight:

[0070] Bi 2 Te 2.75 Se 0.25 30g of powder, 1.1g of multi-walled carbon nanotubes, 0.36g of silane coupling agent KH570, 0.065g of plasticizer ATBC, and 3.8g of PLA.

[0071] The preparation method of this implementation described material is identical with embodiment 1;

[0072] This embodiment also relates to a method for preparing the above-mentioned thermoelectric material into a wire rod for 3D printing, which is:

[0073] A single-screw extruder is used to extrude the prepared composite thermoelectric material powder into a wire rod, and the extrusion temperature is set at 172°C to 174°C, and the wire rod is naturally cooled in the air after extrusion.

Embodiment 3

[0075] This embodiment relates to a thermoelectric material for three-dimensional printing, including the following raw materials in parts by weight:

[0076] Bi 2 Te 2.75 Se 0.25 30g of powder, 1.4g of multi-walled carbon nanotubes, 0.36g of silane coupling agent KH570, 0.065g of plasticizer ATBC, and 3.5g of PLA.

[0077] The preparation method of this implementation described material is identical with embodiment 1;

[0078] This embodiment also relates to a method for preparing the above-mentioned thermoelectric material into a wire rod for 3D printing, which is:

[0079] A single-screw extruder is used to extrude the prepared composite thermoelectric material powder into a wire rod, and the extrusion temperature is set at 175°C to 177°C, and the wire rod is naturally cooled in the air after extrusion.

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Abstract

The invention relates to a composite thermoelectric material for three-dimensional printing. Each 100 parts of the thermoelectric material comprise the following components in parts by weight: 50-90 parts of inorganic thermoelectric material powder, 1-2 parts of a coupling agent, 0.1-1 part of a plasticizer and 5-25 parts of a degradable thermoplastic polymer material; the mass ratio of the inorganic thermoelectric powder to the coupling agent is larger than 100:3 and smaller than 100:1. According to the composite thermoelectric material, by controlling the mass ratio of the inorganic thermoelectric powder to the coupling agent and adopting an appropriate mixing method, the inorganic thermoelectric powder and the thermoplastic high polymer material are well composited, and accordingly, good thermoelectric performance and processing performance are ensured, and the three-dimensional printing composite thermoelectric wire material with uniform diameter is obtained finally.

Description

technical field [0001] The invention relates to the field of 3D printing materials, in particular to a composite thermoelectric material. Background technique [0002] Due to the advantages of no pollution, direct conversion of heat energy into electrical energy, no moving parts in the system, long life, and high reliability, thermoelectric power generation has become a feasible way to self-sufficient energy cycle, rational use of industrial and domestic waste heat, and increase energy utilization rate. . Thermoelectric power generation devices made of inorganic thermoelectric materials represented by Bi2Te3, PbTe and their solid solution alloy materials have become the most widely used thermoelectric power generation devices due to their advantages such as good thermoelectric conversion efficiency, low cost, and good stability. [0003] Two types of materials are mainly used in thermoelectric power generation devices, one is electrode materials used to prepare electrodes, ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08K13/06C08K3/30C08K7/24C08K5/5425C08K9/06C08K5/11B33Y70/00
Inventor 李亮亮李竑泽王诘哲戴敏怡
Owner TSINGHUA UNIV
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