A kind of large-scale production of metal oxide nano-powder preparation method

Abstract

The invention discloses a metallic oxide nano-powder preparation method capable of achieving large-scale production. The method comprises the following steps: forming sol in a solvent by utilizing metal nitrates and complexing agents, then spattering the sol onto a heat source in the form of misty liquid drops and enabling the small liquid drops of sol to carry out combustion reaction on the heat source, thus obtaining the stable metallic oxide nano-powder after reaction is completed. In the preparation method, one-by-one small reaction micro-zones can be formed on the heat source by spraying the sol, thus being beneficial for full combustion and simultaneously effectively avoiding agglomeration between nanoparticles; the preparation method requires low reaction temperature, is simple and economical in equipment and is especially suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing a metal oxide nanometer powder, in particular to a method for preparing a metal oxide nanometer powder capable of large-scale production. Background technique [0002] The existing preparation methods of metal oxide nanopowder mainly include solution combustion method, eruptive solution combustion method and spray pyrolysis method. In the traditional solution combustion method (such as CN103359787A announced by the Chinese Patent Database), the precursor and the stabilizer are mixed and the combustion agent is added, the solution is dried to obtain a dry powder, the powder is ground and then calcined, and the calcined product is ground to obtain a metal oxide Nano-powder, this preparation method has disadvantages such as insufficient combustion and easy agglomeration of nano-powder. When preparing metal oxide nanopowder by eruptive solution combustion method (such as CN102583256A announced by the Chinese...

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Problems solved by technology

In the traditional solution combustion method (such as CN103359787A announced by the Chinese Patent Database), the precursor and the stabilizer are mixed and the combustion agent is added, the solution is dried to obtain a dry powder, the powder is ground and then calcined, and the calcined product is ground to obtain a metal oxide Nano-powder, this preparation method has disadvantages such as insufficient combustion and easy agglomeration of nano-powder

When preparing metal oxide nanopowder by eruptive solution combustion method (such as CN102583256A announced by the Chinese Patent Database), the precursor solution is mixed with the combustion agent and heated. The mixed solution boils and dries until self-propagating combustion occurs, and eruption occurs in the later stage of combustion. Fluffy nano-powder, but this method is complicated to operate and requires high equipment requirements, which is not suitable for industrial production

Although the spray pyrolysis method has many advantages of the liquid-phase method and the gas-phase method, it is usually used to prepare thin films, and it needs to use special spray pyrolysis equipment to continuously provide heat during the pyrolysis process, which has a great impact on experimental equipment and The experimental conditions are relatively high, and it is not suitable for large-scale industrialization

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