A preliminary investigation of the molten salt mediated synthesis of Gd2TiO5 ‘stuffed’ pyrochlore

Abstract

Refractory ‘stuffed’ pyrochlores such as Gd2TiO5 are of interest for nuclear applications, including as matrices for actinide disposition and as neutron absorbers in control rods. Here, we report the results of a preliminary comparative investigation of the synthesis of Gd2TiO5 by molten salt and conventional solid-state synthesis. We show that synthesis of Gd2TiO5 proceeds from the pyrochlore phase Gd2Ti2O7 which is first formed as a kinetic product. Molten salt synthesis afforded single phase Gd2TiO5 at 1300 °C in 2 h, via a template growth mechanism, and is effective for the synthesis of these refractory materials. This work demonstrates molten salt mediated synthesis of ‘stuffed’ pyrochlore for the first time.

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Item Type:	Article
Authors/Creators:	Austin, D.A. Cole, M. Stennett, M.C. Corkhill, C.L. https://orcid.org/0000-0002-7488-3219 Hyatt, N.C.
Copyright, Publisher and Additional Information:	© 2021 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Dates:	Published: 19 April 2021 Published (online): 19 April 2021 Accepted: 7 April 2021
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Funding Information:	Funder Grant number Engineering and Physical Sciences Research Council EP/S01019X/1
Depositing User:	Symplectic Sheffield
Date Deposited:	26 May 2021 08:45
Last Modified:	26 May 2021 08:45
Status:	Published
Publisher:	Springer Nature
Refereed:	Yes
Identification Number:	10.1557/s43580-021-00057-6
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:174552

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A preliminary investigation of the molten salt mediated synthesis of Gd2TiO5 ‘stuffed’ pyrochlore

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