Variable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O7

Abstract Up to now, the thermal expansion behavior of multiphase glass-ceramics cannot be predicted reliably because of the nescience about the formation of the type and concentration of crystalline phases. In the system BaO-SrO-ZnO-SiO2, recently a new phase based on Ba1−xSrxZn2Si2O7 solid solution...

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Autores principales:	Christian Thieme, Martin Schlesier, Eze Oji Dike, Christian Rüssel
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/95b1ebae88b24b879a5869df4f97e063
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spelling	oai:doaj.org-article:95b1ebae88b24b879a5869df4f97e0632021-12-02T15:05:42ZVariable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O710.1038/s41598-017-03132-x2045-2322https://doaj.org/article/95b1ebae88b24b879a5869df4f97e0632017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03132-xhttps://doaj.org/toc/2045-2322Abstract Up to now, the thermal expansion behavior of multiphase glass-ceramics cannot be predicted reliably because of the nescience about the formation of the type and concentration of crystalline phases. In the system BaO-SrO-ZnO-SiO2, recently a new phase based on Ba1−xSrxZn2Si2O7 solid solutions was found, which exhibits unexpected low and highly anisotropic thermal expansion, which can be used for an adjustment of the thermal expansion properties. In the case of sealing materials for high-temperature reactors, the formation of this phase should be avoided. Hence, in this manuscript the concentration thresholds in which these solid solutions precipitate from glasses were determined. The phase analysis was correlated with the thermal expansion behavior of the glass-ceramics. Depending on the Ba/Sr-ratio of the glasses and the considered temperature range, the coefficients of thermal expansion of the glass-ceramics vary between 19.4·10−6 K−1 and 4.8·10−6 K−1. The concentration thresholds in which the as mentioned phases form via crystallization of glasses differ strongly from the literature values obtained via conventional ceramic mixed oxide route.Christian ThiemeMartin SchlesierEze Oji DikeChristian RüsselNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christian Thieme Martin Schlesier Eze Oji Dike Christian Rüssel Variable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O7
description	Abstract Up to now, the thermal expansion behavior of multiphase glass-ceramics cannot be predicted reliably because of the nescience about the formation of the type and concentration of crystalline phases. In the system BaO-SrO-ZnO-SiO2, recently a new phase based on Ba1−xSrxZn2Si2O7 solid solutions was found, which exhibits unexpected low and highly anisotropic thermal expansion, which can be used for an adjustment of the thermal expansion properties. In the case of sealing materials for high-temperature reactors, the formation of this phase should be avoided. Hence, in this manuscript the concentration thresholds in which these solid solutions precipitate from glasses were determined. The phase analysis was correlated with the thermal expansion behavior of the glass-ceramics. Depending on the Ba/Sr-ratio of the glasses and the considered temperature range, the coefficients of thermal expansion of the glass-ceramics vary between 19.4·10−6 K−1 and 4.8·10−6 K−1. The concentration thresholds in which the as mentioned phases form via crystallization of glasses differ strongly from the literature values obtained via conventional ceramic mixed oxide route.
format	article
author	Christian Thieme Martin Schlesier Eze Oji Dike Christian Rüssel
author_facet	Christian Thieme Martin Schlesier Eze Oji Dike Christian Rüssel
author_sort	Christian Thieme
title	Variable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O7
title_short	Variable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O7
title_full	Variable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O7
title_fullStr	Variable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O7
title_full_unstemmed	Variable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O7
title_sort	variable thermal expansion of glass-ceramics containing ba1−xsrxzn2si2o7
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/95b1ebae88b24b879a5869df4f97e063
work_keys_str_mv	AT christianthieme variablethermalexpansionofglassceramicscontainingba1xsrxzn2si2o7 AT martinschlesier variablethermalexpansionofglassceramicscontainingba1xsrxzn2si2o7 AT ezeojidike variablethermalexpansionofglassceramicscontainingba1xsrxzn2si2o7 AT christianrussel variablethermalexpansionofglassceramicscontainingba1xsrxzn2si2o7
_version_	1718388718804402176

Variable thermal expansion of glass-ceramics containing Ba1−xSrxZn2Si2O7

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