FABRICATION, CLASSIFICATION, AND CHARACTERIZATION OF TELLURIUM POWDERS

摘要

Tellurium powder is used as a constituent in heat-producing, thermite-type reactions. In such reactions, long-term stability and reaction rate considerations require a compromise between surface area and particle size. To meet these requirements, a spherical powder was fabricated by atomizing liquid tellurium. In general, air classification techniques proved to be the most successful means of removing adherent fines from tellurium powders. Development of a minimum set of standard powder characterization techniques is outlined and applied to several spherical and irregular tellurium powders.