Local vibration around rare earth ions in alkaline earth fluorosilicate transparent glass and glass ceramics using Eu3+ probe
2008; Elsevier BV; Volume: 26; Issue: 6 Linguagem: Inglês
10.1016/s1002-0721(09)60026-0
ISSN2509-4963
AutoresXusheng Qiao, Qun Luo, Xianping Fan, Minquan Wang,
Tópico(s)Microwave Dielectric Ceramics Synthesis
ResumoBy heat treating the alkaline earth fluorosilicate glass, transparent glass ceramics containing alkaline earth fluoride nanocrystallites were prepared. The luminescence spectra and phonon sideband associated with the Eu3+:5D2 → 7F0 in glass and glass ceramics were investigated to analyze the local environment around Eu3+. Judd-Ofelt parameters were also calculated from emission spectra, which indicated that the Eu3+ ions entered the precipitated CaF2, SrF2, and BaF2 nanocrystallites. Heat treating could not pledge Eu3+ ions to coordinate with F− in the precipitated MgF2 nanocrystallites, owing to the smaller radius of Mg2+ than that of Eu3+.
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