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Preparation method of high-conductivity aluminum-doped zinc oxide nano powder

An aluminum-doped zinc oxide, high-conductivity technology, applied in zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of powder agglomeration and uncontrollable appearance, and achieve controllable appearance, The effect of reducing production cost and low temperature

Active Publication Date: 2014-01-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Literature "T.Strachowski, E.Grzanka, W.Lojkowski, A.Presz, M.Godlewski, S.Yatsunenko, H.Matysiak, R.R.Piticescu, and C.J.Monty, "Morphology and Luminescence Properties of Zinc Oxide Nanopowders Doped with Aluminum Ions Obtained by Hydrothermal and Vapor Condensation Methods, "Journal of Applied Physics, 102[7] 073513, (2007)" discloses a method for preparing AZO powder by hydrothermal method at 200°C, but the prepared powder has agglomeration and Disadvantages such as uncontrollable shape

Method used

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  • Preparation method of high-conductivity aluminum-doped zinc oxide nano powder
  • Preparation method of high-conductivity aluminum-doped zinc oxide nano powder
  • Preparation method of high-conductivity aluminum-doped zinc oxide nano powder

Examples

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Embodiment 1

[0026] like figure 1 As shown, the preparation method of the AZO nanopowder with a doping amount of 2.0mol% in this embodiment comprises the following steps:

[0027] Weigh zinc acetate and aluminum nitrate and put them into a beaker, wherein the molar weight of aluminum ions accounts for 2% of the total molar weight of metal cations. Then add the mixed solution of ethylene glycol methyl ether and ethanolamine of 21ml, the volume ratio of ethylene glycol methyl ether and ethanolamine solution is 20, stir by magnetic force for 1 hour, be made into uniform sol, the molar concentration of metal cation in the sol is 0.75 mol / L. Put the generated sol in an oven, dry at 90°C to obtain a xerogel, and grind to obtain a xerogel powder, that is, a hydrothermal reaction precursor; put the prepared hydrothermal reaction precursor into a hydrothermal kettle, and Add absolute ethanol as a solvent and NaOH as a mineralizer to obtain a reaction solution, the concentration of NaOH in the rea...

Embodiment 2

[0035] The concentration of NaOH in the reaction solution of this example is 0.35 mol / L, and the rest of the conditions and steps are the same as in Example 1 to obtain a high-conductivity aluminum-doped zinc oxide nanopowder. Scanning electron microscope photos show that the nanopowder is spherical, and its volume resistivity is 8499Ω·cm.

Embodiment 3

[0037] The concentration of NaOH in the reaction solution of this example is 0.65 mol / L, and the rest of the conditions and steps are the same as in Example 1 to obtain a high-conductivity aluminum-doped zinc oxide nanopowder. Scanning electron microscope photos show that some rod-like crystals appear in the spherical nanoparticles, and its volume resistivity is 2304Ω·cm.

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Abstract

The invention discloses a preparation method of high-conductivity aluminum-doped zinc oxide nano powder. The preparation method comprises the steps of adding zinc acetate and aluminum nitrate which are taken as raw materials to a beaker, adding a mixed solution of ethylene glycol monomethyl ether and ethanol amine, and magnetically stirring to obtain uniform sol; drying the generated sol in an oven to obtain dry gel, and grinding the dry gel to obtain dry gel powder, namely a hydrothermal reaction precursor; adding the prepared hydrothermal reaction precursor to a hydrothermal kettle, and adding absolute ethyl alcohol as a solvent and NaOH as a mineralizing agent; sealing the reaction kettle, placing the reaction kettle in the oven at 120-180 DEG C, taking out a product after reaction, and filtering the product to obtain precipitate; washing and drying the precipitate to obtain the aluminum-doped zinc oxide powder. The preparation method prepares high-conductivity aluminum-doped zinc oxide nano powder at low temperature without a catalyst, and is simple in process control and synthesis-required instrument and is low in cost.

Description

technical field [0001] The invention relates to a preparation method of aluminum-doped zinc oxide nano-powder, in particular to a preparation method of high-conductivity aluminum-doped zinc oxide nano-powder. Background technique [0002] Zinc oxide (ZnO) is a wide bandgap n-type semiconductor. The band gap E of ZnO at room temperature g =3.37eV, it is an insulating material, but through doping or because it does not strictly abide by the stoichiometric ratio, it leads to the existence of O vacancies and Zn interstitial ions, so zinc oxide often shows good conductivity and transparency. ZnO-based materials have a wide range of applications in UV light emitters, phosphors, piezoelectric transducers, flat panel displays, solar cells, thermal control coatings, gas sensors, etc. By doping Al, Ga, In and other elements, the conductivity of ZnO can be increased by several orders of magnitude, which is a typical transparent conductive oxide (TCO) material. Among these doping ele...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y30/00
Inventor 陈志武战光辉卢振亚巫永鹏
Owner SOUTH CHINA UNIV OF TECH
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