Eine Untersuchungsmethode zur Gasphasentransport in einer geschlossenen Ampulle

A Method for Investigation of the Gas Phase Transport in a Closed Ampoule . The chemical and physical vapor transport are investigated using binary systems of germanium/iodine and iodine/krypton, respectively, as examples. For that purpose, the solid component is placed at the end of a closed ampoule of which the other end is pyramidally shaped. As a consequence of a sudden temperature difference between the ampoule ends, the solid material is transported into the modified end. The contur of the deposition is continuously determined by a computer assisted video technique until the temperature difference has disappeared. The experimental results are compared with the quasi-stationary one-dimensional mass diffusion.