Keele Research Repository
Explore the Repository
Thompson, S, Demyk, K, Day, S, Evans, A, Leroux, H, Depecker, C, Parker, J, Connor, L, Wilhelm, H and Cibin, G (2016) Amorphous silicate nanoparticles with controlled Fe-Mg pyroxene compositions. Journal of Non-Crystalline Solids, 447. 255 - 261. ISSN 1873-4812
A Evans - Amorphous silicate nanoparticles with controlled Fe-Mg pyroxene compositions.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.
Download (2MB) | Preview
Abstract
The production of amorphous pyroxene nanoparticles (~ 20 nm) with controlled Fe-Mg content is described. Homogenous particle compositions closely matching required target stoichiometries are obtained by drying a precursor gel under high vacuum conditions. The silicate nature of the particles is characterised using TEM, synchrotron radiation and FTIR. No oxide phase separation occurs, even at high Fe concentration. Structural domains exist within the nanoparticles that are typically ten times smaller than the physical particle size consistent with either a core-shell, or, random network with multiple embedded domains, particle structure. Thermal annealing below the crystallisation temperature allows the ordered domain size to be further reduced by a factor of ~ 2.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | iron and magnesium silicate; nanoparticles; sol-gel; amorphous material |
Subjects: | Q Science > QD Chemistry |
Divisions: | Faculty of Natural Sciences > School of Physical and Geographical Sciences |
Depositing User: | Symplectic |
Date Deposited: | 06 Jul 2016 09:14 |
Last Modified: | 22 Nov 2018 12:27 |
URI: | https://eprints.keele.ac.uk/id/eprint/1989 |