HYDROTHERMAL METHOD FOR PREPARING MONOCRYSTALS OF ANTIMONY ORTHO- NIOBATE Russian patent published in 1997 - IPC

Abstract RU 2091513 C1

FIELD: monocrystals for electronics. SUBSTANCE: method of preparing monocrystals for use in piezo- and pyroelectric areas includes dissolving initial oxides Sb₂O₃ and Nb₂O₅ in acidic solutions followed by growing crystals at high temperatures (130-175 C) and pressures (10-25 atm) in temperature gradient conditions. Solution components are sodium carbonate and bicarbonate solutions with concentration 9-12 and 10-14 wt % and their volume ratio from 2:0.5 to 3:0.7. Temperature gradient 1.2-1.5 C/cm and solid to liquid phase proportion from 1: 3 to 2:5 are maintained. EFFECT: ensured one-phase formation of SbNbO₄ monocrystals at reduced temperatures and conducting process in pure crystallization medium. 2 cl, 1 tbl

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RU 2 091 513 C1

Authors

Popolitov V.I.

Aleksandrenkov V.P.

Bagrov V.V.

Pavlov V.A.

Krjuchkov V.V.

Dates

1997-09-27—Published

1996-01-23—Filed