Preparation method of thermoelectric compound

A compound and thermoelectric technology, applied in tin compounds, chemical instruments and methods, lead sulfide, etc., can solve the problems of heavy resource and environmental burden, high power consumption, etc., and achieve the effect of low price, short material cycle, and rapid synthesis of materials

Inactive Publication Date: 2014-05-28
HENAN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the preparation process of these traditional thermoelectric materials, a large amount of electric energy is often consumed, and the burden on resources and the environment is relatively heavy.

Method used

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  • Preparation method of thermoelectric compound
  • Preparation method of thermoelectric compound
  • Preparation method of thermoelectric compound

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Embodiment Construction

[0028] In this embodiment, the preparation method of the thermoelectric compound of the present invention is described in detail by taking the preparation process of PbS as an example.

[0029] Such as figure 1 As shown, the method includes the following steps: 1) batching step; 2) dry ball milling step; 3) wet ball milling step; 4) drying step; 5) pressing step; 6) sintering step.

[0030] The above six steps will be described in detail below.

[0031] 1) Ingredients step

[0032] Lead (Pb) powder and sulfur (S) powder are used as the main raw materials, mixed with Pb powder and S powder in a certain molar ratio, and placed in a stainless steel ball mill tank. Preferably, the molar ratio of Pb powder to S powder is 0.8:1.2 to 1.2:0.8, more preferably 1:1. In actual operation, considering the loss of S powder, the molar ratio of Pb powder and S powder can be set to 1:1.03.

[0033] Preferably, high-purity Pb ​​powder (99.9% purity) and S powder (99.99% purity) are used as ...

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Abstract

The invention provides a preparation method of a thermoelectric compound. The preparation method comprises the following steps: (1) preparing raw materials; (2) ball-milling the raw materials through a dry method; (3) ball-milling the raw materials through a wet method; (4) drying; (5) pressing; and (6) sintering. The preparation method has the advantages of low cost, short preparation period, simple technology, energy saving, reduction on energy consumption, and suitability for massive industrial production, and is suitable for preparation of thermoelectric compounds such as PbS, SnS, and the like. The thermoelectric compounds prepared by the preparation method have the advantages of high compactness, low resistivity, low heat conductivity, and high thermoelectric performance.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, in particular, the invention relates to a preparation method of a thermoelectric compound. Background technique [0002] In recent years, the traditional fossil energy represented by oil has become increasingly exhausted and its price has been rising. At the same time, the extensive use of fossil energy has led to the deterioration of the environment. Energy and environmental issues force people to pay more and more attention to new energy and energy conversion materials. Thermoelectric material is a functional material that can realize direct conversion of heat energy and electric energy. It can be used as a thermoelectric generator, so as to effectively utilize a large amount of waste heat and waste heat in industry. Thermoelectric devices do not have any mechanical moving parts, and do not require flowing substances as energy conversion media, so they have the advantages of port...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/21C01G19/00
Inventor 宿太超朱红玉李尚升胡强胡美华樊浩天
Owner HENAN POLYTECHNIC UNIV
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