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2 598 271

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(51)

IPC

C03C6/06(2006-01-01)

C03B5/00(2006-01-01)

C03B1/00(2006-01-01)

C03C3/32(2006-01-01)

(21) (22)

Application

2015128909/03, 2015-07-16

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Start date

2015-07-16

(22)

Actual filing date

2015-07-16

(45)

Published

2016-09-20

(72)

Inventor

Brekhovskikh Mariya NikolaevnaMoiseeva Lyudmila ViktorovnaBatygov Sergej KhacheturovichDemina Lyudmila IvanovnaZhidkova Inga AjvarovnaYurtaeva Sofya Vyacheslavovna

(73)

Holder

Federalnoe Gosudarstvennoe Byudzhetnoe Uchrezhdenie Nauki Institut Obshshej I Neorganicheskoj Khimii Im. N.S. Kurnakova Rossijskoj Akademii Nauk Ran)

METHOD OF PRODUCING FLUORIDE GLASS WITH AN EXTENDED RANGE OF OPTICAL TRANSMISSION Russian patent published in 2016 - IPC C03C6/06 C03B5/00 C03B1/00 C03C3/32

Abstract RU 2598271 C1

FIELD: technological processes.

SUBSTANCE: invention relates to producing fluoride glass with an extended range of optical transmission. Technical result is producing optically transparent glass without oxygen-containing impurities with expanded range transmission of 0.21 to 7.5 mcm for fluorzirconate glass and 0.225 to 8 mcm for fluorhafnate glass. Charge of a mixture of metal fluorides, selected from: metal fluoride of IV group; BaF₂; LaF₃; AlF₃; NAF, is melted in dry argon atmosphere at temperature of 850÷950 °C for 30÷60 minutes and then cooled. Before melting charge is processed with fluorinating agent - xenon difluoride at temperatures of its reaction with oxygen-containing impurities, followed by removal of gaseous reaction products in vacuum. ZrF₄, or HfF₄ are used as metal fluoride of IV group. Processing of the charge by fluorinating agent is performed at temperature of 300÷350 °C for 3÷5 hours. Removal of gaseous reaction products in vacuum is performed at temperature of 100÷150 °C. Produced glass is further annealed at 250÷270 °C for 2÷3 hours to prevent cracking.

EFFECT: producing optically transparent glass without oxygen-containing impurities.

3 cl, 2 dwg, 2 ex

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RU 2 598 271 C1

Authors

Brekhovskikh Mariya Nikolaevna

Moiseeva Lyudmila Viktorovna

Batygov Sergej Khacheturovich

Demina Lyudmila Ivanovna

Zhidkova Inga Ajvarovna

Yurtaeva Sofya Vyacheslavovna

Dates

2016-09-20—Published

2015-07-16—Filed