Effect of lithium concentration on the network connectivity of nuclear waste glasses

Collapse authors list.
Black, Aine G, Scrimshire, Alex, Iuga, Dinu, Lavallee, Yan, Morrison, Kate A, Bingham, Paul A, Taylor, Tracey, Leay, Laura, Harrison, Mike T, Blanc, Frederic ORCID: 0000-0001-9171-1454 et al (show 1 more authors) and Patel, Maulik K ORCID: 0000-0002-3214-5752 (2024) Effect of lithium concentration on the network connectivity of nuclear waste glasses JOURNAL OF NON-CRYSTALLINE SOLIDS, 646. 123234-. ISSN 0022-3093, 1873-4812

	Text Manuscript_NOC-D-24-00215_SecondRevision.docx - Author Accepted Manuscript Download (1MB)
	Text SI_NOC-D-24-00215_SecondRevision.docx - Author Accepted Manuscript Download (1MB)

Abstract

Structure of borosilicate glasses with varying Li<inf>2</inf>O contents were investigated using Magic Angle Spinning (MAS) Nuclear Magnetic Resonance (NMR), employing ⁶Li, ¹¹B, ²³Na, ²⁷Al and ²⁹Si nuclei. ¹¹B MAS NMR revealed that increasing Li<inf>2</inf>O contents result in formation of [BO<inf>4</inf>]⁻ sites at the expense of BO<inf>3</inf>. ¹¹B{⁶Li} and ²⁷Al{⁶Li} dipolar heteronuclear multiple quantum correlation (D-HMQC) NMR revealed Li as a charge compensator for anionic tetrahedral sites with increased Li. ¹¹B{⁶Li} J-coupling mediated HMQC NMR suggested the possible association of Li with non-bridging oxygens on Q² and Q³ sites, indicating its dual role in the glass network. ²⁹Si and ²³Na MAS NMR spectra showed depolymerisation of the silicate network and shortening of Na-O bond lengths with increased Li. NMR results are supported by Raman spectroscopy and thermal analysis that indicate depolymerisation of the silicate network and a reduction in glass transition temperature at higher Li content.

Item Type:	Article
Additional Information:	No restrictions For the purpose of open access, the authors have applied a Creative Commons Attribution (CC BY) license to any Author Accepted Manuscript version arising from this work.
Uncontrolled Keywords:	Borosilicate glass, NMR spectroscopy, Lithium, Boron, Glass structure, Nuclear waste storage
Depositing User:	Symplectic Admin
Date Deposited:	16 Sep 2024 08:38
Last Modified:	16 Jun 2026 16:55
DOI:	10.1016/j.jnoncrysol.2024.123234
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3184525
Disclaimer:	The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.