Manufacture method and device of nanometer alumina powder
A technology of nano-alumina and manufacturing devices, which is applied in the field of nano-materials to achieve the effects of cost reduction, high energy utilization rate, and low manufacturing cost
Inactive Publication Date: 2014-05-14
苏州华微特粉体技术有限公司
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At present, there are many known manufacturing methods of nano-alumina powder, which can be summarized into three categories: solid-phase method, liquid-phase method and gas-phase method, among which the liquid-phase method is more widely used, and the production of nano-alumina powder The raw materials used are generally aluminum-containing compounds. The inventors have not found a technology for the synthesis of nano-alumina powders using CVD (Chemical Vapor Deposition, chemical vapor deposition) for the use of elemental aluminum.
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[0023] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0024] A method for manufacturing nano-alumina powder, comprising the following steps: 1) first heating and melting elemental aluminum blocks to melt elemental aluminum, and then reacting with chlorine gas to generate gaseous aluminum trichloride; 2) combining gaseous aluminum trichloride with The water vapor reacts to generate aluminum oxide solid particles and hydrogen chloride gas; 3) separate the generated aluminum oxide solid particles and hydrogen chloride gas from solid to gas, and collect the obtained solids as nano-alumina powder, gas Sent to follow-up processing.
[0025] Wherein, in step 1), by adjusting the flow rate of chlorine gas, the production flow rate of gaseous aluminum trichloride generated by the reaction is controlled; by introducing a certain amount of nitrogen or argon gas that does not participate in the reaction, the flow rate ...
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Abstract
The invention provides a manufacture method and device of nanometer alumina powder. Elemental aluminum, chlorine gas and water are used as main raw materials, a chemical vapor method is used for synthesizing the nanometer alumina powder, the technological process is simple and safe, the energy utilization rate is high, the manufacture cost is lower, and the produced nanometer alumina powder has better dispersibility. The method comprises the following steps that: 1) firstly, an elemental aluminum block is heated and melt into melt elemental aluminum, and then, the elemental aluminum is in the reaction with the chlorine gas to generate gaseous aluminum trichloride; 2) the gaseous aluminum trichloride and water steam are subjected to reaction for generating aluminum oxide solid particles and hydrogen chloride gas; and 3) the generated aluminum oxide solid particles and the hydrogen chloride gas are subjected to solid and gas separation, the collected prepared solid is the nanometer alumina powder, and the gas is sent to a subsequent work procedure to be treated.
Description
technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a method and device for manufacturing nanometer alumina powder. The manufacturing method and device use elemental aluminum, chlorine gas and water as main raw materials, and use CVD (Chemical Vapor Deposition, chemical vapor deposition) to synthesize the method and device of nano-alumina powder. Background technique [0002] As a new type of high-performance fine inorganic material, nano-alumina is widely used in catalysis, ceramics, aerospace and other fields due to its high hardness, high heat resistance and corrosion resistance. It is currently the most used and most important Nano-oxide, the market prospect is very broad. At present, there are many known manufacturing methods of nano-alumina powder, which can be summarized into three categories: solid-phase method, liquid-phase method and gas-phase method, among which the liquid-phase method is more widely used, ...
Claims
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IPC IPC(8): C01F7/42B82Y40/00
Inventor 胡晞
Owner 苏州华微特粉体技术有限公司