Method for making nano-powder through ultrasonic atomization-microwave pyrolysis

A nano-powder, ultrasonic technology, applied in chemical instruments and methods, oxide/hydroxide preparation, nanotechnology and other directions, can solve the problem of high energy consumption, achieve good quality, simple process route, fast and stable reaction process. Effect

Inactive Publication Date: 2014-02-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the disadvantage is that coal gas, natural gas or heavy oil are mostly used as the heat source, not only the large amount of waste gas produced must be treated separately, but also the waste gas takes away a lot of heat, and the energy consumption is high

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  • Method for making nano-powder through ultrasonic atomization-microwave pyrolysis

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Effect test

Embodiment 1

[0026] The method for preparing nano powder by ultrasonic atomization-microwave pyrolysis, its specific steps are as follows:

[0027] (1) Firstly, the soluble easily decomposable metal salt and water and ethanol solution are configured to form a precursor solution, wherein the volume ratio of water and ethanol solution is 100:0, and the molar concentration of the soluble metal salt in the precursor solution is 0.001mol / L, The soluble metal salt is zinc acetate;

[0028] (2) Ultrasonic atomization of the precursor solution prepared in step (1) to obtain droplets with an average diameter of 10 μm;

[0029] (3) Under the action of carrier gas or fan, the droplets prepared in step (2) are brought into the microwave, and quickly dried and pyrolyzed at 450°C to prepare nano-shell zinc oxide powder.

[0030] The shell thickness of the above-mentioned nano-shell metal oxide powder is about 10nm, the particles are uniformly distributed, and the dispersion is good, such as figure 1 s...

Embodiment 2

[0032] The method for preparing nano powder by ultrasonic atomization-microwave pyrolysis, its specific steps are as follows:

[0033] (1) Firstly, the soluble easily decomposable metal salt and water and ethanol solution are configured into a precursor solution, wherein the volume ratio of water and ethanol solution is 80:20, and the soluble easily decomposable metal salt is 2.16g of InCl 3 .5H 2 O and 0.19 g of SnCl 2 .2H 2 O;

[0034] (2) Ultrasonic atomization of the precursor solution prepared in step (1) to obtain droplets with an average diameter of 100 μm;

[0035] (3) Under the action of carrier gas or fan, the mist prepared in step (2) is brought into the microwave, and quickly dried and pyrolyzed at 700 ° C to prepare nano-ITO powder.

Embodiment 3

[0037] The method for preparing nano powder by ultrasonic atomization-microwave pyrolysis, its specific steps are as follows:

[0038] (1) Firstly, the soluble easily decomposable metal salt and water and ethanol solution are configured into a precursor solution, wherein the volume ratio of water and ethanol solution is 70:30, and the soluble easily decomposable metal salt is 2.25g of SbCl 3 and 6.75g of SnCl 2 .2H 2 O;

[0039] (2) Ultrasonic atomization of the precursor solution prepared in step (1) to obtain droplets with an average diameter of 100 μm;

[0040] (3) Under the action of carrier gas or fan, the droplets prepared in step (2) are brought into the microwave, and quickly dried and pyrolyzed at 600°C, the composite metal of nano-antimony oxide doped tin oxide can be prepared oxide powder.

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Abstract

The invention relates to a method for making nano-powder through ultrasonic atomization-microwave pyrolysis, and belongs to the technical field of inorganic nano-materials. The method comprises the following steps: processing a soluble labile metal salt with a water-ethanol mixed solution to prepare a precursor solution, and carrying out ultrasonic atomization of the obtained precursor solution to obtain droplets; and carrying the droplets to microwaves under the action of a carrying gas or a fan for rapid drying pyrolysis to prepare the nano-powder which is a nanometer shell metal oxide or composite oxide powder. The method utilizes the combination of respective advantages of ultrasonic waves and the microwaves, the ultrasonic waves make a large amount of tiny bubbles generated because of cavitation in a liquid to form the droplets on the surface of the liquid, each of the droplets has a spherical hollow small vacuole structure, and the microwave heating has the advantages of uniform outward heating, selective heating, fast heating speed and easy control.

Description

technical field [0001] The invention relates to a method for preparing nano powder by ultrasonic atomization-microwave pyrolysis, which belongs to the technical field of inorganic nano materials. Background technique [0002] The invention adopts the method for preparing nano powder by ultrasonic atomization-microwave pyrolysis to prepare nano shell metal oxide powder, nano composite powder and nano thin film. [0003] Nanocomposite materials have good properties and are widely used in photoelectric display devices, transparent electrodes, solar cells, liquid crystal displays, catalysis, etc., such as ITO (Sn-doped In2O3), AZO (Al-doped ZnO), GZO (Ga Doped ZnO), IZO (In-doped ZnO), FTO (F-doped SnO2), etc. At present, the methods for preparing composite powder include coprecipitation method, spray thermal decomposition method, organic solvent azeotropic method, etc. Among these methods, the reagents of the former method are easy to obtain, but the cycle time is longer, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14C01G19/00C01G9/02C01G3/02C01G30/00B82Y30/00
Inventor 郭胜惠彭金辉张利华巨少华郭磊
Owner KUNMING UNIV OF SCI & TECH
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