Single-crystal growth of VO2 by isothermal flux-evaporation
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Single crystals up to 1 cm×5 mm×5mm of VO2 have been grown by utilisation of the isothermal flux-evaporation principle. The “flux” used is V2O5 which results in the formation of a low-melting eutectic with a composition between V2O5 and VO2. Best growth was achieved at 1210° C at a pO2 of 10−3.8, yielding crystals up to 2×2×0.5 cm. The formation of a new oxy-carbonate of vanadium is reported and serves as an illustration of the dangers involved in contamination from “controlled atmospheres”.
KeywordsPolymer Atmosphere Vanadium V2O5 Control Atmosphere
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