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Method for preparing lead telluride alloy thermoelectric material through melt spinning and inductive hot-pressing

A technology of thermoelectric materials and lead telluride, applied in the field of thermoelectric materials, can solve the problems of inapplicability to large-scale process production and application, complex preparation process, and lower thermal conductivity, etc., to achieve the suppression of nanoparticle growth, simple preparation process, Effect of reducing thermal conductivity

Active Publication Date: 2016-06-08
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doping metal elements into PbTe to form nano-phases can effectively reduce thermal conductivity. Currently, methods for forming nano-phases in PbTe include chemical synthesis, mechanical ball milling, and high-temperature solid phase segregation, but these methods generally have complex preparation processes. , low output, high cost, high energy consumption and other shortcomings, it is not suitable for large-scale process production and application

Method used

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  • Method for preparing lead telluride alloy thermoelectric material through melt spinning and inductive hot-pressing
  • Method for preparing lead telluride alloy thermoelectric material through melt spinning and inductive hot-pressing
  • Method for preparing lead telluride alloy thermoelectric material through melt spinning and inductive hot-pressing

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Embodiment 1

[0051] A method for preparing a lead telluride alloy thermoelectric material in combination with melt spinning and spinning, comprising the following steps:

[0052] A. Ingredients

[0053] According to the chemical formula Pb 0.98 sn 0.02 Weigh Te, take powdered Pb, Te and Sn, the mass purity of Pb and Te is ≥99.999%, the mass purity of metal elemental Sn is ≥99.95%, and mix uniformly to obtain the raw material composition;

[0054] B. Preparation of master alloy

[0055] Put the raw material composition into a high-temperature container, and then put the high-temperature container into an induction melting furnace. The high-temperature container is preferably a quartz glass tube, and the induction melting furnace is first vacuumed to 5×10 -2 Pa, then fill in an inert gas with a mass purity ≥ 99.99% to 0.01MPa for protection, repeat vacuuming and filling inert gas, cycle more than 3 times, and then carry out under the condition that the induction coil voltage is 220V and t...

Embodiment 2

[0062] A method for preparing a lead telluride alloy thermoelectric material in combination with melt spinning and spinning, comprising the following steps:

[0063] A. Ingredients

[0064] According to the chemical formula Pb 0.91 Ti 0.09 Weigh Te, take powdered Pb, Te and Ti, the mass purity of Pb and Te is ≥99.999%, the mass purity of metal elemental Ti is ≥99.95%, and mix uniformly to obtain the raw material composition;

[0065] B. Preparation of master alloy

[0066] Put the raw material composition into a high-temperature container, and then put the high-temperature container into an induction melting furnace. The high-temperature container is preferably a quartz glass tube, and the induction melting furnace is first vacuumed to 5×10 -2 Pa, then fill in an inert gas with a mass purity ≥ 99.99% to 0.01MPa for protection, repeat vacuuming and filling inert gas, cycle more than 3 times, and then carry out under the condition that the induction coil voltage is 220V and t...

Embodiment 3

[0073] A method for preparing a lead telluride alloy thermoelectric material in combination with melt spinning and spinning, comprising the following steps:

[0074] A. Ingredients

[0075] According to the chemical formula Pb 0.96 Cd 0.04 Weighing Te, weighing powdered Pb, Te and Cd, the mass purity of Pb and Te is ≥99.999%, the mass purity of metal element Cd is ≥99.95%, and mixing uniformly to obtain the raw material composition;

[0076] B. Preparation of master alloy

[0077] First put the raw material composition into a high-temperature container, and then put the high-temperature container into an induction melting furnace. The high-temperature container is preferably a quartz glass tube, and the induction melting furnace is first evacuated to 5×10 -2 Pa, then fill in an inert gas with a mass purity ≥ 99.99% to 0.01MPa for protection, repeat vacuuming and filling inert gas, cycle more than 3 times, and then carry out under the conditions of the induction coil voltage...

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Abstract

The invention relates to a method for preparing lead telluride alloy thermoelectric material through melt spinning and inductive hot-pressing. The method comprises the steps of A, carrying out weighing according to the chemical formula Pb1-xMxTe, weighing powdery Pb, Te and M and mixing the Pb, the Te and the M uniformly, wherein x is greater than 0 but smaller than 0.1 and M is Sn, Cd, Ti or Cr; B, putting the mixed raw material combinations into an induction melting furnace, guiding inert gas into the furnace, then smelting the combinations, continuously smelting the combinations for 1-10 minutes after the combinations are molten and cooling the combinations; C, putting mother alloy obtained after cooling into the induction melting furnace, guiding the inert gas into the furnace, then smelting the mother alloy and carrying out melt spinning after the mother alloy is molten; and D, pulverizing obtained thin strip-shaped products, sintering the pulverized products through the inductive hot-pressing method and obtaining the lead telluride alloy thermoelectric material. Compared with the prior art, the method has the advantages that the preparation technology is simpler, the production cycle is shorter, element volatilization is reduced, parameter control and optimization are easier, the energy consumption is lower, and the yield is higher. The method is suitable for mass production. The obtained lead telluride alloy thermoelectric material is good in one-phase crystallinity, high in relative density, high in power factor, low in heat conductivity and good in stability.

Description

technical field [0001] The invention relates to the field of thermoelectric materials, in particular to a method for preparing a lead telluride alloy thermoelectric material. Background technique [0002] Thermoelectric materials are functional materials that utilize the interaction and transport characteristics of carriers and phonons in solid materials to achieve direct mutual conversion between thermal energy and electrical energy, also known as thermoelectric materials. Thermoelectric materials are characterized by simple structure, small size, no pollution, no noise, long life, high reliability, fast response, and low maintenance cost due to no moving parts. Therefore, thermoelectric materials are used as an energy conversion technology to generate electricity in temperature difference It has broad application prospects in refrigeration and refrigeration. [0003] The power generation efficiency of thermoelectric materials is mainly determined by the performance figure...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/03C22C1/05
CPCC22C1/03C22C1/05C22C1/10
Inventor 斯剑霄丁光潮王古伟杨实丹
Owner ZHEJIANG NORMAL UNIVERSITY
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