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Title: Formation of metallic cation-oxygen network for anomalous thermal expansion coefficients in binary phosphate glass
Authors: Onodera, Yohei  kyouindb  KAKEN_id
Kohara, Shinji
Masai, Hirokazu
Koreeda, Akitoshi
Okamura, Shun
Ohkubo, Takahiro
Author's alias: 小野寺, 陽平
Issue Date: 31-May-2017
Publisher: Springer Nature
Journal title: Nature Communications
Volume: 8
Thesis number: 15449
Abstract: Understanding glass structure is still challenging due to the result of disorder, although novel materials design on the basis of atomistic structure has been strongly demanded. Here we report on the atomic structures of the zinc phosphate glass determined by reverse Monte Carlo modelling based on diffraction and spectroscopic data. The zinc-rich glass exhibits the network formed by ZnOx (averaged x<4) polyhedra. Although the elastic modulus, refractive index and glass transition temperature of the zinc phosphate glass monotonically increase with the amount of ZnO, we find for the first time that the thermal expansion coefficient is very sensitive to the substitution of the phosphate chain network by a network consisting of Zn-O units in zinc-rich glass. Our results imply that the control of the structure of intermediate groups may enable new functionalities in the design of oxide glass materials.
Description: ガラスが熱で変形しやすいのはなぜか、原子レベルで一端を解明. 京都大学プレスリリース. 2017-06-01.
Rights: © The Author(s) 2017. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/2433/225118
DOI(Published Version): 10.1038/ncomms15449
Related Link: https://www.kyoto-u.ac.jp/ja/research-news/2017-06-01-2
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