Obtaining of aluminum nano-powders by thermal treatment

Abstract

It is known that the formation of a dispersed phase under extreme conditions (high temperatures and
process speed) leads to the formation of a non-equilibrium structure of particles. Therefore, the first to
attract attention are technologies based on pulsed processes with high rates of change in the thermodynamic
parameters of the system. One of these promising methods for obtaining a wide range of nano-powders of
inorganic materials is the technology based on the process of electrical explosion of a conductor (EVP, EVP
technology) [1-5]. Unfortunately, this method is not applicable on industrial scales. In this thesis, production
of Al nanoparticles by hydrogen reduction of metal chlorides in gas phase was studied. Nanoparticles have
unique properties not found in bulk or micron-scale materials. These enable new products or reduced use
of raw materials. Metal nanoparticle production has been studied widely, but especially for coated metal
particles, research of coating mechanisms and economic production methods is still needed. The used
method combines a high yield, a high production rate, low production costs, high particle quality, and a
good range of available particle number average diameters and other properties. Control of the product
parameters has been carried out by using a special quenching system and plasma reactor configuration.
Highly hydrogen enriched Al nanopowder were collected in metal form and tested for different applications.