Densification of Porous Aluminum Oxide Powder by Plasma Arc Treatment

摘要

Present paper is devoted to study of the process of aluminum oxide densification by plasma arc in experimental plant.Aluminum oxide was produced in three stages: oxidation of aluminium chips in glass reactor;the treatment of oxidation product in muffle furnace and aluminum oxide densification in plasma arc.It was shown that the density of aluminum oxide after plasma arc treatment increases from about 1.0 to 1.9 g/cm~3.By microstructure analysis it was shown that the product after plasma arc treatment obtained the spherical form of crystals due to the melting of aluminum oxide particles and collisions of the particles with each other.Described method is proposed to be used for mass-production of dense aluminum oxide powders.