Analysis of thermal and structural properties of germanate glasses co-doped with $Yb^{3+}/Tb^{3+}$ ions
PBN-AR
Instytucja
Wydział Inżynierii Materiałowej i Ceramiki (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
ISSN
1386-1425
EISSN
1873-3557
Wydawca
Pergamon-Elsevier Science Ltd.
Rok publikacji
2014
Numer zeszytu
Strony od-do
702--707
Numer tomu
131
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.42
Autorzy
(liczba autorów: 6)
Pozostali autorzy
+ 4
Autorzy przekładu
(liczba autorów przekładu: 0)
Słowa kluczowe
EN
structural properties
kinetic study
germanate glass
Yb3+/Tb3+
co-operative upconversion emission
Streszczenia
Język
EN
Treść
In the work the new glass compositions in the GeO2-GaO-BaO system have been prepared and thermal, structural properties of in germanate glasses co-doped with Yb3+/Tb3+ions were studied. Glasses were obtained by conventional high-temperature melt-quenching technique. The study of the crystallization kinetics processes of glasses co-doped with 0.7Yb2O3:0.7Tb2O3 was performed with DSC measurements. The activation energies have been calculated using Freedman analysis and verified with the Flynn-Wall-Ozawa method. In this order, the DSC curves have been registered with different heating rates, between 5 and 15 degrees/min. The structure of fabricated glasses has been studied by infrared and Raman spectroscopes. The effect of heat treatment on the structural properties was determined. In all glass samples the dominated infrared absorbance band at 800 cm-1 corresponds to asymmetric stretching motions of GeO4 tetrahedra containing bridging (Ge-O(Ge)) and non-bridging (Ge-O-) oxygens. Additionally, the influence of heat treatment on the luminescent properties was evaluated. Strong luminescence at 489, 543, 586 and 621 nm corresponding to 5D4 → 7FJ (J = 6, 5, 4, 3) transitions was measured. The highest upconversion emission intensity was obtained in the germanate glass co-doped with 0.7Yb2O3/0.7Tb2O3. © 2014 Elsevier B.V. All rights reserved.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:083511
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