Rare earth doped glass–ceramics containing NaLaF4 nanocrystals

E. Elsts , G. Krieke, U. Rogulis, K. Smits, A. Zolotarjovs, J. Jansons, A. Sarakovskis, K. Kundzins

Oxyfluoride glasses 16Na2O–9NaF–5LaF3–7Al2O3–63SiO2 (mol%) activated with 3% terbium, dysprosium,
praseodymium and neodymium fluorides have been prepared and studied by differential thermal analysis,
cathodoluminescence, X-ray induced luminescence, X-ray diffraction, scanning electron microscopy
and energy dispersive X-ray spectroscopy. We found out that the presence of crystalline phase enhances
the X-ray induced luminescence intensity. X-ray induced luminescence is the most intense for the sample
activated with terbium and treated at 700 C, whereas the praseodymium and neodymium activated
samples have the fastest decay times.

Optical Materials xxx (2016) xxx–xxx

doi: 10.1016/j.optmat.2016.01.005

pdf-iconDownload PDF

Studies of radiation defects in cerium, europium and terbium activated oxyfluoride glasses and glass ceramics

E. Elsts , U. Rogulis, K. Bulindzs, K. Smits, A. Zolotarjovs, L. Trinkler, K. Kundzins

Terbium, cerium and europium activated oxyfluoride glasses and glass ceramics have been studied by
thermally stimulated luminescence (TSL) and optical absorption techniques after the X-ray irradiation.
A creation of colour centres in oxyfluoride glass matrix and TSL peaks depending on the activator type
were observed. LaF3 and rare earth activators were analysed by SEM–EDS.

Optical Materials 41 (2015) 90–93

DOI: 10.1016/j.optmat.2014.10.042

pdf-iconDownload PDF

Cathodoluminescence of oxyfluoride glass-ceramics

U. Rogulis, E. Elsts , J. Jansons , A. Sarakovskis , G. Doke , A. Stunda , K. Smits

Tb, Ce, Eu activated oxyfluoride glass-ceramics with the composition SiO2 $ Al2O3 $ Li2O $ LaF3 have been
studied by cathodoluminescence (CL). We compared CL intensities and decay times of the Tb, Ce, Eu
activated glass-ceramic samples and observed that the Tb activated sample has the most intense
luminescence, but the Ce activated sample has the shortest decay times. Induced optical absorption and
thermostimulated luminescence have been observed after X-ray irradiation of samples.

Radiation Measurements xxx (2013) 1-4

DOI: 10.1016/j.radmeas.2012.12.020

pdf-iconDownload PDF