Glass-Ceramics with 3-PbF2 as their Crystalline Phase

2 Glass-Ceramics with yS-PbF2 as their Crystalline Phase 

Some germanate and silicate glass-ceramics have been synthesized with / -PbF2 as the crystalline phase. Similarly to the CaF2 system presented before, these glass-ceramics are made by glass devitrification. 

50SiO2 50PbF2 glass-ceramics doped with 4 % (mol) ErF3 or 1 % (mol) EUF3 can also be synthesized [28]. Some optical characterizations evidence the segregation of Er (or Eu ) inside fi-PhV nanocrystallites. 

Such glass-ceramics have been doped with various rare-earth ions, such as Ei, Eu [34], Pr [35], Ho [36] and even doped with two different ions Er +/Yb +, as reported by Wang et a/. [29]. Spectroscopic studies show that rare-earth ions are incorporated well inside the crystallites after devitrification. 

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