Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of low-dimensional nano-silver/bi2te3-based thermoelectric composite material and preparation method thereof

A technology of low-dimensional nano-composite materials, applied in the field of low-dimensional nano-silver/Bi2Te3-based thermoelectric composite materials and their preparation, can solve the problems of reducing the thermal conductivity of the lattice and reducing the electrical conductivity of the composite material, so as to reduce the lattice heat Conductivity, improved production process, and simple preparation method

Active Publication Date: 2016-01-20
DONGHUA UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, while the nanoparticles enhance phonon scattering and reduce the thermal conductivity of the lattice, the carriers are also scattered to a certain extent, thereby reducing the electrical conductivity of the composite.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of low-dimensional nano-silver/bi2te3-based thermoelectric composite material and preparation method thereof
  • A kind of low-dimensional nano-silver/bi2te3-based thermoelectric composite material and preparation method thereof
  • A kind of low-dimensional nano-silver/bi2te3-based thermoelectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] n-type Bi 2 Te 3 Matrix Nanopowder

[0048] Using bismuth chloride and high-purity tellurium powder as raw materials, according to Bi 2 Te 3 Weigh 2mmol bismuth chloride and 3mmol tellurium powder, then add 0.8g disodium ethylenediaminetetraacetic acid, 0.5g sodium hydroxide, 0.15g sodium borohydride, 50ml deionized water in sequence, stir evenly, and ultrasonically Treat for 60 minutes, then transfer the mixed solution to a 100ml polytetrafluoroethylene-lined reactor, add deionization to 80% of the reactor volume, and seal it. The reactor was heated in an oven at 200°C for 8h. After the reaction was complete, the reaction kettle was cooled to room temperature, and the synthesized black powder was suction-filtered, washed repeatedly with deionized water and absolute ethanol for 3 times, and dried under vacuum at 60°C for 6 hours to obtain n-type Bi 2 Te 3 Matrix nanopowder.

[0049] SPS sintering was performed under an Ar atmosphere using a graphite mold. The s...

Embodiment 2

[0051] n-type Bi 2 Te 3 Matrix nanopowder+0.5vol% silver nanowire

[0052] Using bismuth chloride and high-purity tellurium powder as raw materials, according to Bi 2 Te 3 Weigh 2mmol bismuth chloride and 3mmol tellurium powder, then add 0.8g disodium ethylenediaminetetraacetic acid, 0.5g sodium hydroxide, 0.15g sodium borohydride, 50ml deionized water in sequence, stir evenly, and ultrasonically Treat for 60 minutes, then transfer the mixed solution to a 100ml polytetrafluoroethylene-lined reactor, add deionization to 80% of the reactor volume, and seal it. The reactor was heated in an oven at 200°C for 8h. After the reaction was complete, the reaction kettle was cooled to room temperature, and the synthesized black powder was suction-filtered, washed with deionized water and absolute ethanol for 3 times, and dried under vacuum at 60°C for 6 hours to obtain n-type Bi 2 Te 3 Matrix nanopowder.

[0053] Dissolve polyvinylpyrrolidone and silver nitrate in ethylene glycol ...

Embodiment 3

[0057] n-type Bi 2 Te 3 Matrix nanopowder + 1.0vol% silver nanowire

[0058] Using bismuth chloride and high-purity tellurium powder as raw materials, according to Bi 2 Te 3 Weigh 2mmol bismuth chloride and 3mmol tellurium powder, then add 0.8g disodium ethylenediaminetetraacetic acid, 0.5g sodium hydroxide, 0.15g sodium borohydride, 50ml deionized water in sequence, stir evenly, and ultrasonically Treat for 60 minutes, then transfer the mixed solution to a 100ml polytetrafluoroethylene-lined reactor, add deionization to 80% of the reactor volume, and seal it. The reactor was heated in an oven at 200°C for 8h. After the reaction was complete, the reaction kettle was cooled to room temperature, and the synthesized black powder was suction-filtered, washed with deionized water and absolute ethanol for 3 times, and dried under vacuum at 60°C for 6 hours to obtain n-type Bi 2 Te 3 Matrix nanopowder.

[0059] Dissolve polyvinylpyrrolidone and silver nitrate in ethylene glyco...

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
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a low-dimensional nano-silver / Bi2Te3-based thermoelectric composite material and a preparation method thereof. The thermoelectric composite material is composed of two phases, the first phase is nano-Bi2Te3, and the second phase is low-dimensional nano-silver; wherein the thermoelectric composite material The volume percentage of medium nanosilver is 0.5 to 2.5%. Preparation method: Synthesize nano-Bi2Te3 and low-dimensional nano-silver separately, then conduct ultrasonic mixing according to different volume ratios, and finally use discharge plasma SPS technology to sinter to obtain low-dimensional nano-silver / Bi2Te3-based thermoelectric composite materials. Compared with the bismuth telluride-based thermoelectric material, the present invention can significantly reduce the crystal thermal conductivity of the material and increase the Seebeck coefficient of the material while maintaining the conductivity of the base thermoelectric material basically unchanged. Significantly improve the thermoelectric properties of materials.

Description

technical field [0001] The invention belongs to the field of thermoelectric composite materials and their preparation, in particular to a low-dimensional nano-silver / Bi 2 Te 3 Based thermoelectric composite material and its preparation method. Background technique [0002] Thermoelectric materials are a class of functional materials that directly couple and convert thermal energy and electrical energy through the Seebeck effect and Peltier effect of semiconductor materials. Because of its own advantages such as no pollution, no noise, small size, long life and high reliability, it is widely used in cogeneration, aerospace, military equipment, household appliances and other fields. [0003] The performance of thermoelectric materials mainly depends on the material's dimensionless thermoelectric figure of merit ZT (ZT=α 2 σT / κ, where α is the Seebeck coefficient, σ is the electrical conductivity, κ is the thermal conductivity, and T is the absolute temperature). The larger...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/16H10N10/852
Inventor 王连军张骐昊王明辉朱娟娟江莞
Owner DONGHUA UNIV