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2 591 156

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IPC

C30B9/04(2006-01-01)

C30B9/12(2006-01-01)

C30B29/12(2006-01-01)

(21) (22)

Application

2014150353/05, 2014-12-11

(24)

Start date

2014-12-11

(22)

Actual filing date

2014-12-11

(45)

Published

2016-07-10

(72)

Inventor

Bekker Tatyana BorisovnaSolntsev Vladimir PavlovichDavydov Aleksej Vladimirovich

(73)

Holder

Federalnoe Gosudarstvennoe Byudzhetnoe Uchrezhdenie Nauki Institut Geologii I Mineralogii Im. V.S. Soboleva Sibirskogo Otdeleniya Rossijskoj Akademii Nauk Geologii I Mineralogii So Ran, Igm So Ran)

METHOD OF GROWING MONOCRYSTAL OF BARIUM-SODIUM META-FLUOROBORATE BaNa(BO)F Russian patent published in 2016 - IPC C30B9/04 C30B9/12 C30B29/12

Abstract RU 2591156 C2

FIELD: chemistry.

SUBSTANCE: invention relates to technology of growing monocrystals of barium-sodium meta-fluoroborate Ba₂Na₃(B₃O₆)₂F for use in terahertz range from 0.3 THz to 1 THz as wave plates, polarisers, as well as in air terahertz photonics. Monocrystal of Ba₂Na₃(B₃O₆)₂F is grown from high-temperature solution by lowering temperature of solution-melt on a nucleating agent that is retractable and rotating oriented along an optical axis. Solvent used is sodium-barium borate NaBaBO₃. Crystallisation is performed in a Ba₂Na₃(B₃O₆)₂F-NaBaBO₃ system at ratio Ba₂Na₃(B₃O₆)₂F:NaBaBO₃, equal to 60-80:20-40 mol%. Barium-sodium meta-fluoroborate Ba₂Na₃(B₃O₆)₂(F) has in range from 0.3 THz to 1 THz high birefringence (Δn/n = 0.16) and low absorption (less than 10 cm^-1).

EFFECT: technical result consists in reproducible production of monocrystals of Ba₂Na₃(B₃O₆)₂F of optical quality, containing no visible inclusions with coefficient of output - 3 75/100-3 95/100 g/(kg·deg).

1 cl, 2 dwg, 1 ex

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RU 2 591 156 C2

Authors

Bekker Tatyana Borisovna

Solntsev Vladimir Pavlovich

Davydov Aleksej Vladimirovich

Dates

2016-07-10—Published

2014-12-11—Filed