METHOD OF PRODUCTION OF MONO CRYSTALS OF HIGH TEMPERATURE SUPERCONDUCTING COMPOUNDS OF "123" TYPE Russian patent published in 2011 - IPC C30B9/12 C30B29/22 

FIELD: metallurgy.

SUBSTANCE: invention refers to process of production of mono crystals of high temperature superconductors (HTSC) of "123" type, required for experimental research of fundamental properties of HTSC, and also for manufacture of instruments and devices of superconducting electronics. A crucible with mixture of powders containing 1 weight share of preliminary synthesized high temperature superconducting material of "123" type and 5÷15 weight shares of eutectic mixture of barium oxide and copper oxide are heated in a furnace to temperature of mixture melting, and conditioned at this temperature during 20-50 hours in a uniform temperature field. Crystals are being grown during crucible containing mixture cooling at presence of horizontally directed temperature gradient. Crucible with mixture heating and conditioning is performed at temperature 1000±5°C. Directly before cooling the crucible with the said mixture is gradually set off during 10÷15 minutes into a furnace area with horizontal temperature gradient 9÷11 °C/cm, maintaining constant temperature 1000±5°C of a hot wall of the crucible. Further, growth of crystals is performed by cooling the crucible with mixture at rate 0.5÷2°C/hour in constant temperature gradient.

EFFECT: production of mono crystals of HTSC possessing mirror surfaces and dimensions in plane ab more 1 mm.

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