Aluminum-doped zinc oxide-based thermoelectric material and preparation method thereof

A zinc oxide-based, thermoelectric material technology, which is applied in the field of environmentally friendly new energy materials, can solve the problems of low Al solid solution and the influence of material synthesis process conditions, and achieve high density, good mechanical properties and thermoelectric properties, and easy doping effect

Inactive Publication Date: 2010-12-08
TSINGHUA UNIV
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Problems solved by technology

However, the amount of Al solid solution in the obtained ZnO is very low and will be significantly affected by the material synthesis process conditions

Method used

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  • Aluminum-doped zinc oxide-based thermoelectric material and preparation method thereof
  • Aluminum-doped zinc oxide-based thermoelectric material and preparation method thereof
  • Aluminum-doped zinc oxide-based thermoelectric material and preparation method thereof

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Embodiment Construction

[0022] The present invention provides a technology mainly used for thermoelectric conversion, the chemical composition is Zn 1-x Al x O(0≤x≤0.20) oxide thermoelectric material, the material is Zn(OH) 2 And Al(OH) 3 As raw materials, use simple mechanical ball milling and roasting process for activation treatment, and then use spark plasma equipment to directly synthesize Zn 1-x Al x O material finally obtains a bulk material with high density, good machinability and thermoelectric properties.

[0023] The specific method steps for preparing the above include:

[0024] 1. Ingredients: use Zn(OH) 2 And Al(OH) 3 Powder according to Zn 1-x Al x O stoichiometric ratio, where 0≤x≤0.20, the weighed powder and a certain amount of deionized water are loaded into a ceramic substrate or a plastic ball mill tank.

[0025] 2. Ball milling: The ball milling tank is installed on the planetary ball mill for wet ball milling. The ball milling medium is deionized water.

[0026] 3. Baking: Put the mixed...

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Abstract

The invention discloses an aluminum-doped zinc oxide-based thermoelectric material and a preparation method thereof, and belongs to the field of environment-friendly new energy materials. The chemical composition of the zinc oxide-based thermoelectric material is Zn1-xAlxO (x is more than or equal to 0 and less than or equal to 0.20); and the electrical conductivity of the thermoelectric material is 65 to 1,100 S / cm, and the thermal conductivity of the thermoelectric material is 8 to 35 W / m / k. The method for preparing the aluminum-doped zinc oxide-based thermoelectric material comprises the following steps of: proportioning Zn(OH)2 powder and Al(OH)3 powder according to the stoichiometry of Zn1-xAlxO (x is more than or equal to 0 and less than or equal to 0.20); ball-milling and mixing the proportioned raw material powder; roasting the mixed powder at the temperature of between 100 and 550 DEG C in a corundum crucible; and filling the roasted powder into a graphite die and sintering the powder at the temperature of between 500 and 1,200 DEG C to obtain the aluminum-doped zinc oxide-based thermoelectric material. By the method, doping is easier to realize and the high-compactness material can be obtained; and the obtained material has good mechanical property and thermoelectric property.

Description

Technical field [0001] The invention provides an aluminum doping modification of a zinc oxide-based oxide thermoelectric material and its spark plasma sintering (Spark plasma sintering, SPS) preparation process, which belongs to the field of environmentally friendly new energy materials. Background technique [0002] In 1823, Thoums Seebeck discovered the thermoelectric effect for the first time, thus beginning human research and application of thermoelectric materials. As a functional material that can directly convert thermoelectricity, thermoelectric materials are widely used in low-temperature refrigeration, industrial waste heat power generation, and automobile exhaust gas power generation. The thermoelectric materials currently being studied include metal solid solutions, alloy semiconductors and oxide thermoelectric materials. Compared with non-oxides, oxide thermoelectric materials have high-temperature chemical stability, can be used in the atmosphere for a long time, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622C04B35/64
Inventor 李敬锋马宁张波萍陈国峰任丽荣
Owner TSINGHUA UNIV
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