PHYSICAL AND CHEMICAL PROPERTIES OF LaInO3-BASED PHOSPHORS DOPED WITH Dy3+, Ho3+, Sb3+ IONS
Abstract
La0,95Ln0,05InO3, La0,95Ln0,05In0,98Sb0,02O3 (Ln – Dy3+, Ho3+), La0,90Dy0,05Ho0,05InO3, La0,90Dy0,05Ho0,05In0,98Sb0,02O3 photoluminescent phosphor samples were obtained by solid-phase synthesis. Their crystal structure, FT-IR spectra and thermal expansion were investigated. Complex thermal analysis was carried out for the named indates. All samples were found to have orthorhombically distorted perovskite structure. LaSbO3-based impurity phase was found in indates containing Sb3+ ions. The lattice parameters for all indates vary slightly due to the small content of doping ions. IR-spectra for all samples investigated differ slightly from that for LaInO3. There were no anomalies caused by phase transitions at temperature dependences of elongation. The coefficient of average linear thermal expansion is (7.26–7.89)·10–6 К–1. The curves obtained by differential scanning calorimetry demonstrate no thermal effects. Total weight loss in the temperature range of 300–1265 K does not exceed 0.276 wt. %. These results indicate that all the indates investigated are thermally stable and they are promising for practical application in a wide range of operating temperatures.
About the Authors
E. K. Yukhno
Belarusian State Technological University, Minsk
Belarus
Belarus
Ph. D. Student
13a, Sverdlova Str., 220006
L. A. Bashkirov
Belarusian State Technological University, Minsk
Belarus
Belarus
D. Sc. (Chemistry), Professor
13a, Sverdlova Str., 220006
I. N. Kandidatova
Belarusian State Technological University, Minsk
Belarus
Belarus
Ph. D. (Chemistry), Assistant
13a, Sverdlova Str., 220006
M. I. Zhdanenia
Belarusian State Technological University, Minsk
Belarus
Belarus
Student
13a, Sverdlova Str., 220006
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