CHEMICAL-TRANSPORT OF RESTRICTED SOLID-SOLUTIONS OF IN2O3 AND SNO2 - EXPERIMENTS AND THERMODYNAMIC PROCESS ANALYSIS

The preparation of mutual dissoluted In2O3/SnO2 single crystals by the chemical transport method has been investigated. The transport reacti ons were performed using either iodine and sulphur simultaneously or c hlorine as transporting agents and a mixture of pure oxides (4N) as so urce material. The highest concentration values of dissolved oxide wer e obtained after a sequential transport starting from a two phase regi on from 1250 to 1200 K, In this case, the maximum solubilities have be en determined, indium oxide crystals with 8.2 mol% tin oxide and tin o xide crystals with 2.4 mol% indium oxide were grown. The experiments w ere explained with thermodynamical process calculations introducing th e description of the solid phases as regular solid solutions consistin g of nonstoichiometric binary oxides.