Structural species in mixed-fluoride PbF2–CdF2–B2O3 borate glasses; FTIR investigation
作者： H Doweidar , K El-Egili , R Ramadan , E Khalil , None
DOI: 10.1016/J.VIBSPEC.2019.03.003
关键词:
摘要: Abstract X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy have been used to study the structure of xPbF2⋅(45 – x)CdF2⋅55B2O3 (0 ≤ x 45 mol%) glasses. XRD patterns indicated that there are no crystalline phases in these On contrary, SEM 25PbF2⋅20CdF2⋅55B2O3 glass revealed separation PbF2-rich phase limited concentration CdF2 crystallites. It is assumed Pb2+ Cd2+ ions mutual ability activate related each other. IR spectra analyzed follow change structural species. both PbF2 partially modify borate network, forming tetrahedral units rest forms amorphous matrices. Calculated density molar volume obtained by using information agree well with experimental data. has found volumes studied glasses same CdF2–B2O3 PbF2–B2O3
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