DISTINCTIVE FEATURES OF THE INCORPORATION OF SAMARIUM INTO SILICA GEL-GLASSES DOPED BY ALUMINUM AND BARIUM
Abstract
We study the silica gel-glasses obtained by vitrification in air or in a gas mixture of H2:Ar xerogels doped with Sm, Al, and Ba. It is found that during their synthesis it is possible to form impurity hexagonal and tetragonal crystallites of SiO2 and tetragonal crystallites of SmSi2. When the reducing synthesis conditions are applied, the incorporation of samarium in glass simultaneously in two oxidation states (3+ and 2+) takes place. Meanwhile, Sm-Al-containing glasses provide a sufficiently effective sensitization of the luminescence of Sm2+ ions by Sm3+ ions, while in Sm-Al-Ва-containing glasses this effect is absent because Sm2+ ions are localized mainly in the glass sublattice formed with the participation of Ba2+ ions. Based on the spectra obtained, the positions of the energy states of the Sm2+ and Sm3+ ions in such glasses are calculated.
About the Authors
G. E. Malashkevich
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
A. N. Shimko
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
A. P. Stupak
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
I. V. Prusova
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
K. N. Nischev
N. P. Ogarev National Research Mordovian State University
Russian Federation
Saransk, 430000
Russian Federation
Saransk, 430000
V. M. Kyashkin
N. P. Ogarev National Research Mordovian State University
Russian Federation
Saransk, 430000
Russian Federation
Saransk, 430000
A. A. Kornienko
Vitebsk State Technological University
Belarus
Vitebsk, 210035
Belarus
Vitebsk, 210035
E. B. Dunina
F. Skaryna Gomel State University
Belarus
Gomel, 256699
Belarus
Gomel, 256699
A. V. Semchenko
F. Skaryna Gomel State University
Belarus
Gomel, 256699
Belarus
Gomel, 256699
I. I. Sergeev
Belarusian State University of Informatics and Radioelectronics
Belarus
Minsk, 220013
Belarus
Minsk, 220013
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Review
For citations:
Malashkevich G.E., Shimko A.N., Stupak A.P., Prusova I.V., Nischev K.N., Kyashkin V.M., Kornienko A.A., Dunina E.B., Semchenko A.V., Sergeev I.I. DISTINCTIVE FEATURES OF THE INCORPORATION OF SAMARIUM INTO SILICA GEL-GLASSES DOPED BY ALUMINUM AND BARIUM. Zhurnal Prikladnoii Spektroskopii. 2019;86(4):524-530. (In Russ.)
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