PLASMA METHOD OF PRODUCING SELECTIVE PARTICLE SIZED OXIDE, PRODUCT PRODUCED THEREBY AND APPARATUS THEREFOR

摘要

A plasma method and apparatus produce oxide having average diameters determined by adjustment of process conditions. Feed material is fed into a plasma environment and vaporized. Subsequently, effluent containing the vaporized feed from the reaction is passed into a quenching zone where it is subjected to a quenching medium, the volume, velocity and direction of which are adjustable to determine outputparticle size characteristics. Feed material may be an oxide per se or one which forms an oxide in situ through reduction and/or oxidation.