Перегляд за автором "Lytvynov, L.A."

Результати 1-18 з 18

Analysis of dynamic parameters of the KY-crystallization process

Kryvonosov, Ie.V.; Lytvynov, L.A. (Functional Materials, 2016)

The Kyropoulos method is an efficient means for the growth of large high-quality sapphire. The main drawback of this method is the absence of information about the growth rate and geometrical size of the growing crystal ...
Dependence of sapphire hardness on loading type and orientation

Sinani, A.B.; Dynkin, N.K.; Konevskiy, P.V.; Lytvynov, L.A. (Functional Materials, 2009)

The mechanical strength of sapphire in different crystallographic diorections has been studied within a wide loading range. A correlation has been found between the resistance to hig-speed shock and the sapphire crystallography.
Effects of doping with manganese on the optical properties of magnesium aluminate spinel crystals

Gritsyna, V.T.; Kazarinov, Yu.G.; Kol'ner, V.B.; Lytvynov, L.A.; Sickafus, K.E. (Functional Materials, 2005)

The effects of doping with manganese ions on the optical properties of magnesium aluminate spinel crystals grown by Czochralski method were investigated. The optical spectra of the doped crystals have intense absorption ...
Foreign phase inclusions in Ti-sapphire grown in a carbon-containing medium

Vyshnevskiy, S.D.; Kryvonosov, Ye.V.; Lytvynov, L.A. (Functional Materials, 2006)

The effect of carbon-containing growth medium on the character and formation features of foreign phase inclusions in Тi-sapphire has been studied. The crystals so grown may include both micrometer-sized (2 to 17 µm) ...
Growth of long-length sapphire rods of optical quality

Andreev, Yu.P.; Kryvonosov, Yu.V.; Lytvynov, L.A.; Vyshnevskiy, S.D. (Functional Materials, 2005)

The technological possibilities of the growth of optical-quality sapphire rods with a diameter of 12...20 mm and a length of 500...1000 mm by the Stepanov method. The influence of crystallization rate and crystallographic ...
Kinetic parameters of charge carrier traps in magnesium-aluminum spinel crystals after X-ray and UV irradiation

Kobyakov, V.A.; Volokitin, V.N.; Shevtsova, D.N.; Lytvynov, L.A. (Functional Materials, 2006)

Thermoluminescence (TL) of non-stoichiometric MgO‧2.5Аl₂O₃ spinel single crystals in the green emission range after X-ray and UV irradiation has been studied. The TL maximum at 420 К emitted within that spectral region ...
On the words used as names for ruby and sapphire

Lytvynov, L.A. (Functional Materials, 2011)
Optical and laser properties of Ti-sapphire grown by different methods in reducing medium

Kryvonosov, E.V.; Nizhankovskiy, S.V.; Lytvynov, L.A.; Bui, A.A. (Functional Materials, 2012)

Optical and laser properties of Ti-sapphire grown in reducing gaseous medium are studied. It is shown that HDSM-crystals have satisfactory functional characteristic and can be used for the making of wide-aperture laser ...
Optimization of KY-crystallization process

Kryvonosov, Ie.V.; Lytvynov, L.A. (Functional Materials, 2017)

The Kyropoulos method is an efficient means for growth of large high-quality single crystals. Technologists try to use the methods of numeral simulation for analytical calculation of thermodynamic conditions of crystallization ...
Peculiarity of sapphire application in medicine

Lytvynov, L.A. (Functional Materials, 2014)

Considered are the properties of sapphire which make it expedient for application in relatively new branches of medicine such as microsurgery, implantology, medical instrument making. Peculiarities of the use of sapphire ...
Potentialities for sapphire strength enhancement

Voloshyn, O.V.; Lytvynov, L.A.; Slyunin, E.V. (Functional Materials, 2007)

The study results are presented concerning the influence of technological factors, such as annealing atmosphere and mechanical treatment, on the sapphire strength. The ultimate strength under four-point flexure has been ...
Preparation of tungsten crucibles starting from tungsten fluoride

Gorenko, Yu.V.; Korzh, A.F.; Lytvynov, L.A.; Semyonov, N.A.; Hovansky, N.A.; Shirokov, B.M. (Functional Materials, 2007)

The study results are presented on technology development for forming of cylindrical tungsten crucibles starting from tungsten fluoride by reduction WF₆ with hydrogen in horizontal flow-type reaction under reduced pressure. ...
Some peculiarities of the use of sapphire light guides in metallurgy

Zhukov, L.F.; Lytvynov, L.A. (Functional Materials, 2010)
Specific growing features of variable section sapphire articles by Stepanov technique

Konevskiy, P.V.; Andreev, E.P.; Lytvynov, L.A. (Functional Materials, 2008)

Problems in growth of variable section corundum crystals by Stepanov technique have been considered. The structure perfection of the crystal profile variation zone has been studied as a function of the growing technology ...
Structural and mechanical characteristics of magnesium-aluminate spinel crystals grown by Verneuil and Czochralski methods

Belykh, G.I.; Gritsyna, V.T.; Lytvynov, L.A.; Kol'ner, V.B. (Functional Materials, 2005)

The investigations of X-ray diffraction in magnesium aluminate spinel crystals of stoichiometric and non-stoichiometric compositions grown by Verneuil method were provided. It was revealed the decrease of MgO content at ...
Thermal conductivity of pure and Cr³⁺ and Ti³⁺ doped Al₂O₃ crystals in 50-300 K temperature range

Popov, P.A.; Solomennik, V.D.; Belyaev, P.V.; Lytvynov, L.A.; Puzikov, V.M. (Functional Materials, 2011)
Transformation of spinel crystals structure МgО·nАІ₂O₃ under high-temperature annealing

Belykh, G.I.; Gritsyna, V.T.; Lytvynov, L.A.; Kolner, V.B. (Functional Materials, 2009)

The processes at high temperature annealing of non-stoichiometric МgО·nАІ₂O₃ spinel crystals (n = 2.2) in O₂ atmosphere at 1300-1500°C have been investigated. A gradual non-stoichiometry increase up to n = 2.8 has been ...
Wettability of sapphire

Voloshyn, O.V.; Kononenko, V.I.; Lytvynov, L.A.; Sevidova, E.K. (Functional Materials, 2006)

Presented are the study results of wetting of main crystallographic surfaces of sapphire with water and glycerin by measuring the wetting angle of a rest drop. It is shown that, depending on the surface function of a ...

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Перегляд за автором "Lytvynov, L.A."

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