Rare earth dependent formation of PbF2 nanocrystals and its effect on the emission properties in oxyfluoride glasses

Transparent oxyfluoride glass ceramics

“…Several researchers used Raman spectroscopy to study oxyfluoride glass ceramics (e.g., [167,274,[356][357][358][359][360][361]). Tikhomirov et al [359,360] assigned two lines, observed in Raman spectra at relatively low vibrational frequencies, to spheroidal and torsional vibrations of PbF 2 spheric nanoparticles in the glass matrix and calculated diameters of the latter to be ca.…”

“…Thus, many authors noted the enhanced luminescence properties of Eu [21,36,43,51,52,97,178,185,201,206,207,219], Er 3+ [45,47,56,57,91,184,187,220,357], Tb 3+ [43,72,178,111], Sm 3+ [63,223], Tm 3+ [178], Dy 3+ [274], Pr 3+ [41], and pair Eu 2+ /Mn 2+ [113] in oxifluoride glass ceramic in comparison with their glass precursors. Scintillation intensity of CaF 2 :Eu 2+ under X-ray exitation is weaker in glass ceramics compared to single crystal, alhough stronger than Eu 2+ -doped glass [71].…”