In this study, we investigated how the composition and ratio of sintering additives MgO and CaO influence the optical properties of ceramic materials YAG:Cr3+ and YAG:Cr4+. All samples exhibited high transparency at 1100 nm (greater
than 80 %). However, around ~340 nm, increased concentrations of Ca2+ or Mg2+ ions resulted in decreased light transmission coefficients for the samples. Following annealing in air, the most pronounced absorption in the 750…1100 nm range was observed in samples with higher amounts of sintering additives. As the fraction of Ca/Mg increased, so did the absorption of Cr4+ cations. Among the compositions studied, an optimal CaO content of 0.12 wt. % was identified; beyond this level, additional absorption due to microdefect formation was noted. Scanning electron microscopy data revealed a granular structure for the ceramic samples, with grain sizes ranging from 1 to 10 ?m, showing no significant variations in microstructure based on the type or quantity of sintering additives.
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
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
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
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
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
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
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
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
Ekaterina A. Brazhko – engineer 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
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