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High stability Cu2-xSe composite thermoelectric material and preparation method thereof

A thermoelectric material and high-stability technology, which is applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, etc., can solve problems such as affecting application and easy deformation of thermoelectric modules, achieves a simple method, and promotes commercial application. , Improve the effect of high temperature structural stability

Active Publication Date: 2017-07-25
SHENZHEN QIANHAI HUAZHAO NEW ENERGY CO LTD
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  • Description
  • Claims
  • Application Information

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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 preparation method thereof
  • High stability Cu2-xSe composite thermoelectric material and preparation method thereof
  • High stability Cu2-xSe composite thermoelectric 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 kind of Cu with high stability 2-x The preparation method of Se composite thermoelectric material comprises the following steps:

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

[0029] 2) Prepare inorganic salt solution;

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

[0031] 4) The Cu containing inorganic salt solution obtained in step 3) is 2-x Se small particle 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 10 nm to 1 mm, preferably 100 nm to 100 μm, and more preferably 50 μm to 100 μm. Understandably, Cu 2-x If the par...

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 Aqueous solution 50ml; ground Cu 2-x Se powder particles immersed in formulated CuCl 2 solution, and mix thoroughly; the mixed Cu 2-x The Se powder was heated to 50 degrees Celsius in a quartz tube, and dried under the protection of an argon atmosphere; the dried powder particles were put into a graphite mold with a diameter of 20 mm and sintered in a spark plasma sintering system. The sintering pressure is 60MPa, the sintering temperature is 600℃, 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

The invention discloses a preparation method of a Cu2-xSe composite thermoelectric material with high stability. The method comprises steps that 1), a Cu2-xSe block material is ground; 2), an inorganic salt solution is prepared; 3), Cu2-xSe particles acquired in the step 1) and the inorganic salt solution prepared in the step 2) are mixed; 4), the Cu2-xSe particles containing the inorganic salt solution acquired in the step 3) is dried; and 5), the Cu2-xSe particles acquired in the step 4) is sintered to acquire a compact block, and the Cu2-xSe composite thermoelectric material with high stability is acquired. The invention further provides the Cu2-xSe composite thermoelectric material acquired through the method.

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 increasingly serious environmental problems caused by the consumption of traditional energy, especially PM2.5 pollution, are 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 often cannot be effectively utilized. Thermoelectric materials can realize the direct mutual conversion of thermal energy and electric energy, and can realize the direct power generation of medium and low temperature heat sources such as industrial waste heat and geothermal heat. It 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 it is one of the...

Claims

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Application Information

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Patent Type & Authority Applications(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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