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Variable thermal expansion of glass-ceramics containing Ba(1−x)Sr(x)Zn(2)Si(2)O(7)

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-SiO(2), recently a new phase based on Ba(1−x)Sr(x)Zn(2)Si(2)O(7) solid solut...

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Autores principales: Thieme, Christian, Schlesier, Martin, Oji Dike, Eze, Rüssel, Christian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5469781/
https://www.ncbi.nlm.nih.gov/pubmed/28611368
http://dx.doi.org/10.1038/s41598-017-03132-x
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author Thieme, Christian
Schlesier, Martin
Oji Dike, Eze
Rüssel, Christian
author_facet Thieme, Christian
Schlesier, Martin
Oji Dike, Eze
Rüssel, Christian
author_sort Thieme, Christian
collection PubMed
description 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-SiO(2), recently a new phase based on Ba(1−x)Sr(x)Zn(2)Si(2)O(7) 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.
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spelling pubmed-54697812017-06-19 Variable thermal expansion of glass-ceramics containing Ba(1−x)Sr(x)Zn(2)Si(2)O(7) Thieme, Christian Schlesier, Martin Oji Dike, Eze Rüssel, Christian Sci Rep Article 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-SiO(2), recently a new phase based on Ba(1−x)Sr(x)Zn(2)Si(2)O(7) 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. Nature Publishing Group UK 2017-06-13 /pmc/articles/PMC5469781/ /pubmed/28611368 http://dx.doi.org/10.1038/s41598-017-03132-x Text en © The Author(s) 2017 Open Access 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Thieme, Christian
Schlesier, Martin
Oji Dike, Eze
Rüssel, Christian
Variable thermal expansion of glass-ceramics containing Ba(1−x)Sr(x)Zn(2)Si(2)O(7)
title Variable thermal expansion of glass-ceramics containing Ba(1−x)Sr(x)Zn(2)Si(2)O(7)
title_full Variable thermal expansion of glass-ceramics containing Ba(1−x)Sr(x)Zn(2)Si(2)O(7)
title_fullStr Variable thermal expansion of glass-ceramics containing Ba(1−x)Sr(x)Zn(2)Si(2)O(7)
title_full_unstemmed Variable thermal expansion of glass-ceramics containing Ba(1−x)Sr(x)Zn(2)Si(2)O(7)
title_short Variable thermal expansion of glass-ceramics containing Ba(1−x)Sr(x)Zn(2)Si(2)O(7)
title_sort variable thermal expansion of glass-ceramics containing ba(1−x)sr(x)zn(2)si(2)o(7)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5469781/
https://www.ncbi.nlm.nih.gov/pubmed/28611368
http://dx.doi.org/10.1038/s41598-017-03132-x
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