METHOD FOR PRODUCING NEEDLE MONOCRYSTALS OF MOLYBDENUM VI OXIDE VI MOO3 Russian patent published in 2017 - IPC C30B29/62 C30B29/16 C30B23/00 C01G39/02 B82B3/00 B82Y30/00 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: surface of the molybdenum tape, securely fixed with its ends and arched upwards in the form of an arch, is heated by resistive, inductive or radiation exposure to a temperature of 650-700°C in an oxidizing gaseous environment containing from 10 to 40% of oxygen and an inert gas or a mixture of inert gases at a pressure exceeding 100 Pa, maintained at this temperature for at least 10 s from the moment of the occurrence of MoO₃ vapours of white colour, then the heating is stopped and molybdenum tape is cooled to 25°C, after which the heating is resumed at a temperature of 650-700°C up to the formation on the ends and the surface of molybdenum tape from MoO₃ vapours of thin needle monocrystals of molybdenum oxide with length up to 5 mm.

EFFECT: resulting crystals are easily separated from the workpiece in the form of a tape, have a high degree of purity and structural perfection.

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