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A kind of preparation method of Ni-doped ZNO textured thermoelectric material

A thermoelectric material and texture technology, which is applied in the field of preparing Ni-doped ZnO textured thermoelectric materials and ion sintering technology, can solve the problems that thermoelectric materials have not been reported.

Inactive Publication Date: 2016-05-11
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

At present, the preparation of Zn with both nanometer and textured structure characteristics 1-x Ni x O bulk thermoelectric materials have not been reported

Method used

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  • A kind of preparation method of Ni-doped ZNO textured thermoelectric material
  • A kind of preparation method of Ni-doped ZNO textured thermoelectric material
  • A kind of preparation method of Ni-doped ZNO textured thermoelectric material

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Embodiment Construction

[0010] First, Ni-doped ZnO nano-microcomposite spherical precursor powder was prepared by hydrothermal method, and zinc acetate (Zn(CH 3 COO) 2 2H 2 O) (mass fraction greater than 99%) and nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) (mass fraction greater than 99%) is raw material, triethanolamine ((HOCH 2 CH 2 ) 3 N) As a surfactant and deionized water as a solvent, a Ni-doped ZnO nano-micro composite spherical precursor powder was prepared in a hydrothermal kettle. The formed nano-micro composite spheres have a diameter of 1-15 μm, and the (00l) axes of the nanoparticles are radially arranged along the diameter direction of the microspheres. The nano-micro composite spherical precursor powder is subjected to spark plasma sintering to obtain a Ni-doped ZnO bulk material with a grain size of 100-900nm and a texture degree of 20%-70%.

[0011] The experimental conditions are as follows: hydrothermal temperature 120-240°C, hydrothermal time 6-80h, pH value 7.0-9.0; discharge pl...

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Abstract

A method for preparing Ni-doped ZnO textured thermoelectric materials, belonging to the field of energy material technology. Its characteristics are: zinc acetate and nickel nitrate are used as raw materials, configured according to the general chemical formula Zn1-xNixO (0.001≤x≤0.5mol), triethanolamine is used as surfactant, deionized water is used as solvent, and the pH value is 7.0~9.0. After hydrothermal reaction at 120-240°C for 6-80 hours, nano-micro composite spherical powder with a diameter of 1-15 μm, which is self-assembled from 10-900 nm nanoparticles, is prepared, and then through discharge plasma sintering technology, the pressure is 30-200 MPa. , at a temperature of 850 to 1400°C, hold and sinter for 1 to 30 minutes to prepare a Ni-doped ZnO bulk material with a texture of 20% to 70% and a grain size of 100 to 900nm. This method can simply and quickly prepare Ni-doped ZnO bulk materials with both nanometer and textured structural characteristics, which can improve carrier mobility while reducing thermal conductivity, thereby improving thermoelectric properties.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to a method for preparing a Ni-doped ZnO textured thermoelectric material, involving a hydrothermal synthesis method and a discharge plasma sintering process. Background technique [0002] The development of today's society is inseparable from energy, and non-renewable energy is becoming increasingly scarce and will be exhausted in the near future, which cannot meet the needs of human life and social progress. At the same time, in the process of using these energy sources, it will also cause environmental pollution problems. Thermoelectric conversion technology can directly convert a large amount of waste heat into electrical energy, which is one of the desirable solutions to alleviate environmental pollution problems. Thermoelectric conversion devices made of thermoelectric materials have the advantages of no noise, no vibration, and no mechanical parts. They h...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34H10N10/01
Inventor 张波萍叶道盛张代兵张雨桥
Owner UNIV OF SCI & TECH BEIJING
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