Zobrazeno 1 - 10
of 98
pro vyhledávání: '"O.M. Vovk"'
Publikováno v:
Ceramics International. 46:22781-22786
Yttrium aluminum garnet optical ceramics (Y3−xCaxAl4.95Cr0.05O12) doped with 0.1 at.% of chromium ions and 0.5, 0.8 and 1.2 at.% of calcium ions were prepared by reactive sintering in vacuum at 1750°C. The influence of SiO2 and CaO sintering aids
Akademický článek
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Publikováno v:
Optical Materials. 126:112126
Autor:
Sergiy Parkhomenko, M.A. Chaika, Wieslaw Strek, Wojciech Paszkowicz, Piotr Dłużewski, Dariusz Hreniak, Mirosław Kozłowski, O.M. Vovk, Robert Tomala, Andriy Doroshenko, Nadiya Safronova
Publikováno v:
Journal of the American Ceramic Society. 102:2104-2115
Autor:
M.A. Chaika, Wieslaw Strek, O.M. Vovk, S.V. Parkhomenko, Dariusz Hreniak, N.A. Dulina, O.V. Gayduk, Giulia Mancardi, A.G. Doroshenko, Robert Tomala
Publikováno v:
Ceramics International. 44:13513-13519
Yttrium Aluminium Garnet (YAG) ceramics doped with chromium were prepared by solid-state reactive sintering in a vacuum. The influence of the charge compensator Ca2+ concentration on microstructure, optical properties and efficacy of Cr3+ oxidation t
Autor:
A G Fedorov, M. Chaika, K Lesniewska-Matys, Dariusz Hreniak, Paweł Dłużewski, Giulia Mancardi, K Morawiec, A.G. Doroshenko, O.M. Vovk, D Podniesinski, Robert Tomala, Pavel V. Mateychenko, Wieslaw Strek, S.V. Parkhomenko, A. Kozłowska
This paper focuses on the kinetics of Cr4+ formation in Cr,Ca:YAG ceramics prepared by solid-state reaction sintering. The kinetics of Cr4+ formation was studied by annealing of Cr,Ca:YAG ceramics in ambient air under different temperatures at differ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::811dcb60ec65908658fc1105237cfaef
http://hdl.handle.net/11583/2839521
http://hdl.handle.net/11583/2839521
Autor:
A. Szczepańska, A.G. Doroshenko, Wieslaw Strek, O.M. Vovk, Dariusz Hreniak, K. Morawiec, Robert Tomala, N.A. Safronova, Paweł Dłużewski, S.V. Parkhomenko, Giulia Mancardi, M.A. Chaika, K. Jablonska
The distribution of Ca2+ ions in high optical quality Cr4+,Ca:YAG ceramics after vacuum sintering followed by air annealing was successfully investigated by HRTEM, STEM, EDX, XPS and optical absorption spectroscopy. The HRTEM microscopy reveals the f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90a0111d4020ffc1d3801c2d3e075435
http://hdl.handle.net/11583/2839513
http://hdl.handle.net/11583/2839513
Akademický článek
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Publikováno v:
Journal of Luminescence. 226:117467
The present work concerns the upconversion luminescence in Cr3+:YAG single crystal under infrared laser irradiation. During the experiment, 404 nm, 808 nm, 980 nm, and 1064 nm laser excitation sources in range of −150 °C–600 °C were employed. A
Publikováno v:
Optical Materials. 101:109774
Due to the good thermal-mechanical and luminescence properties, Yb:YAG ceramics are suitable as thin-disk lasers; however, their efficiency is limited by the presence of Yb2+ ions, which entail parasitic energy transfer from Yb3+ to Yb2+. This articl