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High stability cu2-xse composite thermoelectric material and its preparation method

A cu2-xse, thermoelectric material technology, applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, etc., can solve the problems of easy deformation of thermoelectric modules, affecting applications, etc., to promote commercial application, the method is simple , the effect of low cost

Active Publication Date: 2019-05-10
SHENZHEN QIANHAI HUAZHAO NEW ENERGY CO LTD
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Problems solved by technology

As an excellent thermoelectric material, Cu 2-x The shortcoming of the thermoelectric module made of Se is easy to deform at high temperature greatly affects its application.

Method used

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  • High stability cu2-xse composite thermoelectric material and its preparation method
  • High stability cu2-xse composite thermoelectric material and its preparation method
  • High stability cu2-xse composite thermoelectric material and its preparation method

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preparation example Construction

[0027] Please refer to Figure 1-3 , the embodiment of the present invention provides a Cu with high stability 2-x The preparation method of Se composite thermoelectric material comprises the steps:

[0028] 1) Add Cu 2-x Se bulk material grinding;

[0029] 2) preparing inorganic salt solution;

[0030] 3) the Cu obtained in step 1) 2-x Se small particles are mixed with the inorganic salt solution prepared in step 2);

[0031] 4) the Cu containing inorganic salt solution obtained in step 3) 2-x Se small particles drying;

[0032] 5) Sintering the small particles obtained in step 4) to obtain a dense block, that is, to obtain a Cu2-xSe thermoelectric material with improved structural stability.

[0033] In step 1), preferably, x ranges from 0 to 1. More preferably, x ranges from 0 to 0.5. Ground Cu 2- x The Se particle size is 10nm-1mm, preferably: 100nm-100μm, more preferably: 50μm-100μm. Understandably, Cu 2-x If the particle size of Se is too small, the thermoel...

Embodiment 1

[0040] Weigh 5g of Cu1.9Se bulk material, grind it with an agate mortar, the particle size is 50-100μm; prepare 0.1mol / L CuCl 2 50ml aqueous solution; the ground Cu 2-x Se powder particles were immersed in the prepared CuCl 2 solution, and mixed thoroughly; the mixed Cu 2-x The Se 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 60MPa, the sintering temperature is 600°C, the vacuum is less than 10Pa, and the temperature is kept for 15 minutes. A dense bulk material is obtained, that is, Cu with improved structural stability is obtained 2-x Se thermoelectric material.

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Abstract

A Cu with high stability 2‑x The preparation method of Se thermoelectric composite material comprises: 1) with Cu 2‑x Se bulk material grinding; 2) preparation of inorganic salt solution; 3) the Cu obtained in step 1) 2‑x Se small particles are mixed with the inorganic salt solution prepared in step 2); 4) the Cu containing inorganic salt solution obtained in step 3) 2‑x drying the small Se particles; 5) sintering the small particles obtained in step 4) to obtain a dense block, that is, to obtain a Cu2‑xSe thermoelectric material with improved structural stability. The present invention also provides a Cu obtained by the above method 2‑x Se thermoelectric composites.

Description

technical field [0001] The invention relates to a new energy material field, in particular to a high-stability Cu 2-x Se composite thermoelectric material and preparation method thereof. Background technique [0002] Now, the environmental problems caused by the consumption of traditional energy are becoming more and more serious, especially PM2.5 pollution, which is threatening the health of more and more people. At the same time, there is also huge waste in traditional energy consumption, and industrial waste heat is often not effectively utilized. Thermoelectric materials can realize the direct mutual conversion of thermal energy and electric energy, and can realize direct power generation of medium and low temperature heat sources such as industrial waste heat and geothermal heat, which is an effective means to solve energy waste and alleviate environmental pollution. Cu 2-x Se is one of the most potential thermoelectric materials at medium and high temperature, and o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34H01L35/16H10N10/01H10N10/852
CPCH10N10/852H10N10/01
Inventor 林建平欧阳文道黄宇
Owner SHENZHEN QIANHAI HUAZHAO NEW ENERGY CO LTD
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