A5069689225- Luminescence Properties of Advanced Materials
- Solid State Laser Technologies
- Fullerene Chemistry and Applications
- Photorefractive and Nonlinear Optics
- Graphene research and applications
- Advanced ceramic materials synthesis
- Glass properties and applications
- Microwave Dielectric Ceramics Synthesis
- Nuclear materials and radiation effects
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Carbon Nanotubes in Composites
- Radiation Detection and Scintillator Technologies
- Gas Sensing Nanomaterials and Sensors
- Molecular Junctions and Nanostructures
- Material Properties and Applications
- ZnO doping and properties
- Silicone and Siloxane Chemistry
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Diamond and Carbon-based Materials Research
- Conducting polymers and applications
- Catalytic Processes in Materials Science
- Nonlinear Optical Materials Research
- Advanced Battery Materials and Technologies
- GaN-based semiconductor devices and materials
National Academy of Sciences of Ukraine
2010-2024
Institute for Single Crystals
2011-2024
Unité de catalyse et de chimie du solide de Lille
2024
Catalyse
2024
University College London
2019
Polish Academy of Sciences
2019
Institute of Electronic Materials Technology
2019
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine
1996-2004
O.Ya. Usikov Institute for Radiophysics and Electronics
1996
Lomonosov Moscow State University
1989
The formation of a stable finely dispersed aqueous colloidal solution fullerenes C60 and C70 with particle sizes ⩽0.22 µm is reported hypotheses concerning the nature solutions are discussed.
This paper focuses on the kinetics of Cr4+ formation in Cr,Ca:YAG ceramics prepared by solid-state reaction sintering. The was studied annealing ambient air under different temperatures at times, resulting transformation Cr3+ to Cr4+. activation energy (Ea) oxidation determined Jander model 2.7 ± 0.2 eV, which is good correlation with innergrain oxygen diffusion YAG lattice. It concluded that limited through grain body. established ceramics, intralattice cation exchange, ions exchange...
Abstract In the present work, influence of Cr and Ca co‐additives on phase formation under conditions emulated real sintering process 4+ : YAG ceramics is studied. The XRD analysis treated samples revealed difference in rates intermediate phases between with without 2 O 3 additive. solid‐state reaction Y Al observed to shift toward higher temperatures (ie, stage fast shrinkage) if mixture CaO added. reason for such appearance new intermediate, which contains ions perovskite structure, as has...
Ce3+ doped Al2O3-YAG eutectics were successfully grown by the horizontal directional crystallization method. The rate of eutectic growth was changed in 1-7.5 mm/h range at a temperature 1835 ℃. microstructure samples investigated using scanning electron microscopy and X-ray microtomography. intrinsic morphology represents stripe-like channel structure with random distribution garnet Y3Al5O12 (YAG) Al2O3 (sapphire) phases. content these phases stripes changes 52.9-55.3% 46.1-47.1% ratios,...
The peculiarities of the horizontal directional crystallization melt (Y 3 Al 5 O 12 , 90 wt.% and 2 10 wt.%) were studied. evolution both morphology ingot microstructure inclusions as a function rate solidification was established. It shown that begins with growth YAG single crystal, which turns into cellular growth, cells surrounded by YAG-Al eutectic. Cellular is replaced dendritic followed spontaneous crystallization. consist eutectic usually presented pores caused in confined volume....
The efficiency of Cr4+:YAG is directly proportional to the transparency and concentration Cr4+ which can be tuned by changing divalent dopant. aim this study was investigate influence different kinds dopants on properties Cr,Me:YAG (Me = Ca, Mg or Ca/Mg) ceramics made solidstate sintering in vacuum. Pure YAG phases with an in-line transmittance 80% at 1064 nm were prepared. It revealed that it does not depend type Our experiment proves high optical quality prepared change when additives are used.