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Structural and Luminescence Studies on Barium Sodium Borosilicate Glasses Containing Uranium Oxides
Author(s) -
Mishra Raman K.,
Sudarsan Vasanthakumaran,
Jain Savita,
Kaushik Chetan P.,
Vatsa Rajesh K.,
Tyagi Avesh K.
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12735
Subject(s) - borosilicate glass , uranyl , uranium , barium , luminescence , materials science , sodium oxide , phase (matter) , inorganic chemistry , actinide , barium oxide , silicate , analytical chemistry (journal) , mineralogy , oxide , nuclear chemistry , chemistry , metallurgy , optoelectronics , organic chemistry , chromatography
Barium sodium borosilicate glasses containing different amounts of uranium oxides were prepared by conventional melt quench method and investigated for their structural aspects by 29 Si and 11 B MAS NMR technique combined with steady‐state luminescence and lifetime measurements. Based on MAS NMR studies, it is confirmed that uranium ions act as network modifier up to 15 wt% and beyond which a separate uranium containing phase is formed. From the luminescence studies, it is inferred that uranyl species is in a highly distorted environment. For more than 15 wt% uranium oxide incorporation, weaker U–O–U linkages are formed at the expense stronger U–O–Si/B linkages, as suggested by the excited state lifetime value of the uranyl species as well as red shift in emission peak maximum. For glass samples containing more than 25 wt% uranium oxides, crystalline barium uranium silicate gets phase separated from glass matrix as confirmed by XRD studies.