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Manufacturing method for Ni-doped ZnO texture thermoelectric material

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

Inactive Publication Date: 2014-04-09
UNIV OF SCI & TECH BEIJING
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the preparation of Zn with both nanometer and textured structure ch

Method used

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  • Manufacturing method for Ni-doped ZnO texture thermoelectric material
  • Manufacturing method for Ni-doped ZnO texture thermoelectric material
  • Manufacturing method for Ni-doped ZnO texture 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

The invention discloses a manufacturing method for Ni-doped ZnO texture thermoelectric material and belongs to the technical field of energy material. The manufacturing method is characterized in that zinc acetate and nickel nitrate serve as raw material and are prepared according to the chemical general formula Zn1-xNixO (0.001<=x<=0.5mol), triethanolamine serves as a surface active agent, deionized water serves as a solvent, the pH value is 7.0-9.0, hydrothermal reaction is performed for 6-80h at the temperature of 120-240 DEG C, nano-micro composite spherical powder which is formed by automatically assembling nano-particles of 10-900nm is prepared, wherein the diameter of the nano-micro composite spherical powder is 1-15micrometers, then thermal insulation sintering is performed for 1-30 minutes at the pressure of 30-200MPa and at the temperature of 850-1400 DEG C through a spark plasma sintering technology, the Ni-doped ZnO block material with the 20-70% texture degree is obtained, and the grain size is 100-900nm. The method can be used for easily and rapidly preparing the Ni-doped ZnO block material which has nano and texture structure characteristics at the same time, while the carrier mobility is improved, the heat conductivity is reduced, and therefore thermoelectric performance is improved.

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...

Claims

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Application Information

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IPC IPC(8): H01L35/34
Inventor 张波萍叶道盛张代兵张雨桥
Owner UNIV OF SCI & TECH BEIJING
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