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Preparation method of doped zinc oxide nano powder

A zinc oxide nano-powder technology, which is applied in the field of preparation of doped zinc oxide nano-powder, can solve the problems of non-conductivity, high impurity content, uneven distribution of doped zinc oxide powder, etc., and achieve uniform distribution and high purity. high effect

Inactive Publication Date: 2010-09-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to fundamentally solve the second equal problem of uneven distribution of doped zinc oxide powder, high impurity content, and non-conductivity in the existing preparation method of doped zinc oxide powder.

Method used

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  • Preparation method of doped zinc oxide nano powder
  • Preparation method of doped zinc oxide nano powder
  • Preparation method of doped zinc oxide nano powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve aluminum nitrate and zinc nitrate together in deionized water to form a salt solution with a total salt concentration of 1 mol / L, wherein the molar ratio between aluminum ions and zinc ions is 0.032:1, under strong stirring at a speed of 600 rpm Evenly add dropwise to 3mol / L ammonia solution (solvent is deionized water) at a rate of 20mL / min, keep the pH value of the system at 7.5±0.5 and the temperature at 30°C during the dropwise addition process, and obtain the co-precipitated product; After aging the co-precipitated product for 24 hours, the precipitate was washed three times with deionized water and once with absolute ethanol, and then dried in an oven at 100°C for 10 hours to obtain a dry white product; the white product was dried at 600°C Calcining at lower temperature for 2 hours, the aluminum-doped zinc oxide nanopowder was obtained, wherein the molar ratio between aluminum ions and zinc ions was 0.032:1.

[0038] After testing, the SEM photo of the ab...

Embodiment 2

[0041] Dissolve aluminum nitrate and zinc nitrate together in deionized water to form a salt solution with a total salt concentration of 0.5 mol / L, wherein the molar ratio between aluminum ions and zinc ions is 0.032:1, and the At a speed of 5mL / min, it was evenly added dropwise to 2mol / L ammonia solution (the solvent was deionized water), and the pH value of the system was kept at 8.3±0.3 during the dropwise addition process, and the temperature was 20°C to obtain the coprecipitated product ; After the co-precipitated product was aged for 24h, the precipitate was washed 4 times with deionized water, then washed 2 times with absolute ethanol, and then dried in an oven at 100°C for 10h to obtain a dry white product; the white product was dried at 500°C Calcining at high temperature for 2 hours to obtain aluminum-doped zinc oxide nanopowder, wherein the molar ratio between aluminum ions and zinc ions is 0.032:1.

[0042] After testing, it can be seen from the SEM photos, EDS spe...

Embodiment 3

[0044] Dissolve aluminum nitrate and zinc nitrate together in deionized water to form a salt solution with a total salt concentration of 3 mol / L, wherein the molar ratio between aluminum ions and zinc ions is 0.02:1, under strong stirring at a speed of 400 rpm Add it dropwise evenly at a rate of 50mL / min to a 5mol / L ammonia solution (the solvent is deionized water), keep the pH of the system at 9.6±0.4 during the dropwise addition, and keep the temperature at 50°C to obtain a co-precipitated product; After aging the co-precipitated product for 30 hours, the precipitate was washed 5 times with deionized water, then washed 2 times with absolute ethanol, and then dried in an oven at 100°C for 15 hours to obtain a dry white product; the white product was dried at 700°C Calcining at lower temperature for 3 hours to obtain aluminum-doped zinc oxide nanopowder, wherein the molar ratio between aluminum ions and zinc ions is 0.02:1.

[0045] After testing, it can be seen from the SEM p...

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Abstract

The invention discloses a preparation method of doped zinc oxide nano powder, which comprises the following steps that: doped metal salt and zinc salt are dissolved in water to form salt solution; under intense stirring, the salt solution is uniformly dripped into precipitant solution, the pH value of a mixed system is kept to be 5 to 10 and the temperature is kept to be 10 to 80DEG C during the dripping process to obtain a coprecipitation product; after the coprecipitation product is aged for 10 to 30h, precipitate is sequentially washed by deionzied water and absolute ethyl alcohol and is dried to obtain a white product; and the white product is calcined for 1 to 5h at 400 to 800DEG C to prepare the doped zinc oxide nano powder. The method has the advantages of low cost, simple used equipment and easy large-scale industrial production, and the prepared doped zinc oxide nano powder has the advantages of uniform distribution, high purity and no non-conductive second phase, and can be used for preparing high-quality zinc oxide-based sputtering targets.

Description

technical field [0001] The invention relates to the technical field of photoelectric materials, in particular to a preparation method of doped zinc oxide nanopowder. Background technique [0002] Transparent conductive oxide thin films have been widely used in flat panel displays and thin film solar cells due to their properties such as band gap, high transmittance in the visible spectrum region, and low resistivity. At present, different series of transparent conductive oxide thin film materials have been developed, among which ZnO-based materials have attracted great attention due to their low-cost and non-toxic properties. Zinc oxide itself is a semiconductor with low conductivity (conductivity is about 10 -14 s / cm), but its conductivity has been greatly improved after doping with aluminum, gallium, etc. (conductivity is 10 3 -10 4 s / cm), and the transmittance in the visible light region is higher than 85%, which can replace the more commonly used indium tin oxide (ITO...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/626
Inventor 杨晔宋伟杰魏铁锋张宇龙赵俊华王建林张贤鹏谭瑞琴
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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