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High stability zn4sb3 thermoelectric composite material and preparation method thereof

A thermoelectric material and high-stability technology, which is applied in the direction of thermoelectric device node lead-out materials, thermoelectric device manufacturing/processing, metal processing equipment, etc., can solve problems that hinder application and affect thermoelectric performance, and achieve low cost and method Simple and effective in improving structural stability at high temperatures

Active Publication Date: 2018-12-28
XIAMEN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zn 4 Sb 3 When it is higher than 150°C, it will slowly decompose into elemental Zn and ZnSb, thus affecting its thermoelectric performance
It also hinders its application in actual industrial production

Method used

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  • High stability zn4sb3 thermoelectric composite material and preparation method thereof
  • High stability zn4sb3 thermoelectric composite material and preparation method thereof
  • High stability zn4sb3 thermoelectric composite material and preparation method thereof

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preparation example Construction

[0027] Please refer to Figure 1-3 , the embodiment of the present invention provides a Zn with high stability 4 Sb 3 A method for preparing a thermoelectric composite material, comprising the steps of:

[0028] 1) Zn 4 Sb 3 block material grinding;

[0029] 2) preparing inorganic salt solution;

[0030] 3) with the Zn obtained in step 1) 4 Sb 3 Small particles are mixed with the inorganic salt solution prepared in step 2);

[0031] 4) the Zn that contains the inorganic salt solution that step 3) obtains 4 Sb 3 Drying of small particles;

[0032] 5) sintering the small particles obtained in step 4) to obtain a dense block, that is, to obtain Zn with improved structural stability 4 Sb 3 thermoelectric materials.

[0033] In step 1), preferably, x ranges from 0 to 1. More preferably, x ranges from 0 to 0.5. Ground Zn 4 Sb 3 The particle size is 10nm-1mm, preferably: 100nm-100μm, more preferably: 50μm-100μm. It is understandable that Zn 4 Sb 3 If the particle ...

Embodiment 1

[0040]Weigh 5g of Zn 4 Sb 3 Block material, use agate mortar to grind, the particle size is 50-100μm; prepare 0.1mol / L ZnCl 2 Aqueous solution 50ml; the ground Zn 4 Sb 3 The powder particles are immersed in the prepared ZnCl 2 solution, and mixed thoroughly; the mixed Zn 4 Sb 3 The powder is heated to 50 degrees Celsius in a quartz tube, and dried under the protection of an argon atmosphere; the dried powder particles are put into a graphite mold with a diameter of 20mm, and put into a spark plasma sintering system for sintering. The sintering pressure is 80MPa, the sintering temperature is 430°C, the vacuum is less than 10Pa, and the temperature is kept for 15 minutes. A dense bulk material is obtained, i.e. Zn with improved thermal stability 4 Sb 3 thermoelectric materials.

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Abstract

A preparation method of a Zn4Sb3 thermoelectric composite material with high stability, comprising: 1) grinding the Zn4Sb3 bulk material; 2) preparing an inorganic salt solution; 3) mixing the Zn4Sb3 small particles obtained in step 1) with step 2) The prepared inorganic salt solution is mixed; 4) drying the Zn4Sb3 small particles containing the inorganic salt solution obtained in step 3); Zn4Sb3 thermoelectric material. The present invention also provides a Zn4Sb3 thermoelectric composite material obtained by the above method.

Description

technical field [0001] The invention relates to a new energy material field, in particular to a high stability Zn 4 Sb 3 Composite thermoelectric material and its preparation method. Background technique [0002] In the process of traditional energy consumption, up to 60% of the energy is converted into heat, a large amount of which is wasted in the form of waste heat. This kind of waste not only causes the greenhouse effect, but also causes serious environmental pollution problems. Research on alternative environmentally friendly new energy sources is attracting the attention of all countries. Thermoelectric materials can realize the direct mutual conversion of thermal energy and electric energy, and can use industrial waste heat, geothermal and other medium and low temperature heat sources to directly generate electricity, which is an effective means to alleviate the energy crisis. It does not need moving parts, has reliable performance and long life, is easy to control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/14B22F3/105B22F1/00H01L35/18H01L35/34H10N10/01H10N10/853
CPCB22F3/105B22F3/14B22F2003/1051B22F2998/10B22F1/14H10N10/853H10N10/01B22F9/04
Inventor 林建平陈偲郑中华
Owner XIAMEN UNIV OF TECH
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