METHOD OF PRODUCING ZINC MOLYBDATE MONOCRYSTALS Russian patent published in 2009 - IPC C30B15/02 C30B17/00 C30B29/32 

FIELD: chemistry.

SUBSTANCE: invention relates to growing high-temperature inorganic monocrystals and can be used in quantum electronics and elementary-particle physics, in particular for neutrinoless double beta decay detectors. The said monocrystals are grown by pulling zinc molybdate crystals ZnMoO₄ from molten initial charge in a melting pot for inoculation. The initial charge used is a mixture of oxides ZnO and MoO₃, taken in stoichiometric ratio with excess MoO₃ in amount of 1.0-7.0 wt %, and growth takes place at crystallisation volume rate of over 0.4 cm³/h. Using Czochralski growth method, pulling rate is 0.3-3.0 mm/h with axial temperature gradient at the crystallisation front of 80-100°/cm. Using Kyropoulos growth method, pulling rate does not exceed 0.5 mm/h while maintaining crystal diametre of 80-95 % of the diametre of the melting pot.

EFFECT: proposed method allows for obtaining large monocrystals (size of 1 cm³ or more), with optical properties suitable for use as scintillation detectors and optical elements.

3 cl, 2 ex, 2 dwg