Liquid state properties and solidification features of the pseudo binary BaS-La2S3

Abstract The high temperature thermodynamic properties of chalcogenides materials based on BaS remain elusive. Herein the pseudo binary BaS-La2S3 is investigated above 1573 K. The liquid properties of BaS-La2S3 are measured by means of high resolution in-situ visualization coupled with thermal arres...

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Autores principales:	Charles Boury, Antoine Allanore
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ad6c4159dccb44cc99f111873b8c320f
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spelling	oai:doaj.org-article:ad6c4159dccb44cc99f111873b8c320f2021-12-02T17:24:02ZLiquid state properties and solidification features of the pseudo binary BaS-La2S310.1038/s41598-021-93576-z2045-2322https://doaj.org/article/ad6c4159dccb44cc99f111873b8c320f2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93576-zhttps://doaj.org/toc/2045-2322Abstract The high temperature thermodynamic properties of chalcogenides materials based on BaS remain elusive. Herein the pseudo binary BaS-La2S3 is investigated above 1573 K. The liquid properties of BaS-La2S3 are measured by means of high resolution in-situ visualization coupled with thermal arrest measurements in a thermal imaging furnace. This enables to report the first observation of such melts in a container-less setting. The melting points of BaS and La2S3 are revisited at 2454 K and 2004 K respectively. La2S3 demonstrates a high stability in its liquid state, in strike difference with the sublimation observed for BaS. BaS is however partially stabilized with the addition of few percents of La2S3. The remarkable chemical and thermal stability of La2S3-rich samples contrasts with the partial decomposition and high vapor pressure observed for BaS-rich samples. Observations and analysis of the solidified samples suggest three different solid solutions. Solid and liquid densities are investigated along the different compositions, supporting a first estimate of the volumetric thermal expansion coefficient for La2S3.Charles BouryAntoine AllanoreNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Charles Boury Antoine Allanore Liquid state properties and solidification features of the pseudo binary BaS-La2S3
description	Abstract The high temperature thermodynamic properties of chalcogenides materials based on BaS remain elusive. Herein the pseudo binary BaS-La2S3 is investigated above 1573 K. The liquid properties of BaS-La2S3 are measured by means of high resolution in-situ visualization coupled with thermal arrest measurements in a thermal imaging furnace. This enables to report the first observation of such melts in a container-less setting. The melting points of BaS and La2S3 are revisited at 2454 K and 2004 K respectively. La2S3 demonstrates a high stability in its liquid state, in strike difference with the sublimation observed for BaS. BaS is however partially stabilized with the addition of few percents of La2S3. The remarkable chemical and thermal stability of La2S3-rich samples contrasts with the partial decomposition and high vapor pressure observed for BaS-rich samples. Observations and analysis of the solidified samples suggest three different solid solutions. Solid and liquid densities are investigated along the different compositions, supporting a first estimate of the volumetric thermal expansion coefficient for La2S3.
format	article
author	Charles Boury Antoine Allanore
author_facet	Charles Boury Antoine Allanore
author_sort	Charles Boury
title	Liquid state properties and solidification features of the pseudo binary BaS-La2S3
title_short	Liquid state properties and solidification features of the pseudo binary BaS-La2S3
title_full	Liquid state properties and solidification features of the pseudo binary BaS-La2S3
title_fullStr	Liquid state properties and solidification features of the pseudo binary BaS-La2S3
title_full_unstemmed	Liquid state properties and solidification features of the pseudo binary BaS-La2S3
title_sort	liquid state properties and solidification features of the pseudo binary bas-la2s3
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ad6c4159dccb44cc99f111873b8c320f
work_keys_str_mv	AT charlesboury liquidstatepropertiesandsolidificationfeaturesofthepseudobinarybasla2s3 AT antoineallanore liquidstatepropertiesandsolidificationfeaturesofthepseudobinarybasla2s3
_version_	1718380929851850752

Liquid state properties and solidification features of the pseudo binary BaS-La2S3

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