Pressure-induced structural changes in titanophosphate glasses studied by neutron and X-ray total scattering analyses

Ying Shi, Nadja T. Lonnroth, Randall E. Youngman, Sylwester J. Rzoska, Michal Bockowski, Morten Mattrup Smedskjær

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8 Citationer (Scopus)

Abstrakt

In this paper, the densification mechanism of two titanophosphate glasses (binary 73TiO 2-27P 2O 5 and ternary 68TiO 2-5Al 2O 3-27P 2O 5) is investigated. The glasses are densified by isostatic N 2-mediated pressure treatment at elevated temperature and the pressure-induced structural changes are studied by neutron and X-ray total scattering analyses. The medium range structure change is revealed from the change in the first sharp diffraction peak (FSDP), where the density increase by pressurization is correlated with the decreased medium range repeating spacing calculated from the position of FSDP. The hot compression treatment also increases the medium range order, as shown by the increased correlation length calculated from the width of FSDP. The short range structure changes are examined by separating P–O and Ti–O pair distribution functions (PDF) using differential neutron and X-ray PDFs. Pressurization is also found to increase the coordination number of Ti, as previously observed for other network formers in densified glasses.

OriginalsprogEngelsk
TidsskriftJournal of Non-Crystalline Solids
Vol/bind483
Sider (fra-til)50-59
Antal sider10
ISSN0022-3093
DOI
StatusUdgivet - 1 mar. 2018

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