A detection method for the equivalent thickness of the oxide layer on the surface of ultrafine aluminum powder particles

Abstract

The invention provides a method for detecting the equivalent thickness of the oxide layer on the surface of ultrafine aluminum powder particles. By performing X-ray structure detection on ultrafine aluminum powder samples and analyzing oxide species according to the PDF atlas, it is determined that the oxide layer in the aluminum powder particles is Existence of aluminum species; particle distribution detection of aluminum powder, each sample is tested three times to determine the volume average diameter D of aluminum powder; respectively detect the heat absorption value △H of the raw material 1A99 industrial pure aluminum in the heating process 0 and the heat absorption value △H of the prepared aluminum powder in the heating process, according to the thermodynamic characteristics of the phase transition, determine the mass percentage content of alumina in the aluminum powder particles and the heat absorption value △H0, the heat absorption value △ The relationship between H; the equivalent thickness of the oxide layer is calculated according to the particle structure of the aluminum powder and the mass percentage of alumina. The detection method of the invention is simple and intuitive, conforms to the production process and has high precision.

Description

technical field [0001] The invention belongs to the technical field of material processing and inspection, and in particular relates to a method for detecting the equivalent thickness of an oxide layer on the surface of ultrafine aluminum powder particles. Background technique [0002] Ultrafine aluminum powder has a wide range of applications. It is mainly used as fuel for rocket propulsion in the aerospace industry, and is also used as a primary raw material for military explosives, etc.; it is also used as a raw material for external metallic paints for high-end cars, mobile phones, motorcycles, and bicycles. Or steelmaking degassing, deoxidation, or used in chemical industry, fireworks and firecrackers, etc. [0003] Because ultrafine aluminum powder is an aluminum matrix, it is difficult to detect the oxide content in it by physical and chemical analysis methods. On the other hand, due to the small particle size of the prepared aluminum powder, the general physical det...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for detecting the equivalent thickness of the oxide layer on the surface of ultra-fine aluminum powder particles, aiming to solve the problems of cumbersome and lack of precision in the existing detection methods for the thickness of the oxide layer of micron aluminum powder

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