期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 378, 期 -, 页码 282-289出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2013.06.026
关键词
Nuclear; Glass; Structure; Uranium
资金
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- Royal Academy of Engineering and Nuclear Decommissioning Authority
- Engineering and Physical Sciences Research Council [EP/I012214/1, EP/G037140/1]
- EPSRC [EP/I012214/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I012214/1] Funding Source: researchfish
The effect of uranium on glass structure is of interest in the context both of geological and nuclear waste glasses. In this study, solid state Magic Angle Spinning Nuclear Magnetic Resonance (MAS-NMR) spectroscopy was used to establish the effect of UO3 on the bulk structure of mixed alkali borosilicate glass. The effects of increasing UO3 content on boron co-ordination, alkali co-ordination and network polymerisation, determined using MAS-NMR, show that UO3 acts essentially as an intermediate within the glass, occupying sites in the interstices of the glass network related to the alkali channels. This requires little structural rearrangement of the glass and so allows for the high solubility of UO3. It is shown that each mole of UO3 requires 2 moles of alkali for charge balance. Li-7 MAS-NMR spectra indicate that with the addition of UO3 the structural role of Li changes. (C) 2013 Elsevier B.V. All rights reserved.
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