Effect of Lithium Concentration on the Network Connectivity of Nuclear Waste Glasses

Black, Aine ORCID: https://orcid.org/0000-0003-0700-8235 (2024) Effect of Lithium Concentration on the Network Connectivity of Nuclear Waste Glasses. [Data Collection]

This is the latest version of this item.

Data Catalogue DOI: 10.17638/datacat.liverpool.ac.uk/2828

Description

Structure of borosilicate glasses with varying Li2O 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 Li2O contents result in formation of [BO4]- sites at the expense of BO3. 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 highlighted 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.

Keywords:

Borosilicate glass NMR spectroscopy Lithium Boron Glass structure Nuclear waste storage

Divisions:

Faculty of Science and Engineering > School of Engineering > Mechanical, Materials and Aerospace Engineering

Depositing User:

Aine Black

Date Deposited:

08 Oct 2024 10:55

Last Modified:

08 Oct 2024 14:06

DOI:

10.17638/datacat.liverpool.ac.uk/2828