The purpose of this work is to study the effect of scandium in the dodecahedral and octahedral positions of the garnet crystal lattice on the features of vacuum sintering of optical ceramics Y3-хScxAl2-yScyAl3O12:Cr, as well as on its optical and luminescent properties. YSAG:Cr optical luminescent ceramics were manufactured for the first time from ceramic powders of metastable compositions with a high scandium content in a dodecahedral position. The considered compositions were described by the general formula Y3-хScxAl2-yScyAl3O12, where 0,12 ? x ? 1,50 and 0,08 ? y ? 1,00 f. u. with a total scandium content from 0.12 to 1.70 f. u. The following studies of YSAG:Cr: ceramic samples were carried out:
X-ray diffractometry, measurement of the shrinkage kinetics of ceramic compacts by dilatometry, study of the morphology and elemental composition of the ceramic surface by scanning electron microscopy (SEM). The light transmission and luminescence spectra were measured. It is shown that ceramics made from compositions with a predominant scandium content in the dodecahedral position reach maximum density at lower temperatures compared to compositions containing a greater amount of scandium in octahedral positions. It was found that with an increase in the sintering temperature of YSAG:Cr ceramics compositions with a high scandium content in the dodecahedral position become unstable.
Viacheslav A. Lapin – Candidate of Technical Sciences, Senior Researcher of the Sector of Physical and Chemical Methods of Research and Analysis of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Victoria E. Suprunchuk – Candidate of Chemical Sciences, Senior Researcher of the Nanopowder Synthesis Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vitaly A. Tarala – Candidate of Chemical Sciences, Head of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Dmitry S. Vakalov – Candidate of Physical and Mathematical Sciences, Head of the Sector of Physical and Chemical Methods of Research and Analysis of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia. E-mail: megadims@ gmail.com
Alexander A. Kravtsov – Candidate of Technical Sciences, Head of the Nanopowder Synthesis Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Fedor F. Malyavin – Head of Ceramics Sintering Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Ludmila V. Tarala – Researcher of the Nanopowder Synthesis Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Evgeniy V. Medyanik – Researcher of Ceramics Sintering Sector of the Research Laboratory of Technology of Advanced Materials and Laser Media of the Scientific Laboratory Complex of Clean Rooms, Faculty of Physics and Technology, North-Caucasus Federal University, Stavropol, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Lev V. Kozhitov – Doctor of Technical Sciences, Professor of the Department of Technology of Electronics Materials, National Research Technological University “MISiS”, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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