University of Oulu

Sreenivasan H, Kinnunen P, Adesanya E, Patanen M, Kantola AM, Telkki V-V, Huttula M, Cao W, Provis JL and Illikainen M (2020) Field Strength of Network-Modifying Cation Dictates the Structure of (Na-Mg) Aluminosilicate Glasses. Front. Mater. 7:267. doi: 10.3389/fmats.2020.00267

Field strength of network-modifying cation dictates the structure of (Na-Mg) aluminosilicate glasses

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Author: Sreenivasan, Harisankar1; Kinnunen, Päivö1; Adesanya, Elijah1;
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu, Oulu, Finland
2Nano and Molecular Systems Research Unit, University of Oulu, Oulu, Finland
3NMR Research Unit, University of Oulu, Oulu, Finland
4Department of Materials Science and Engineering, The University of Sheffield, Sheffield, United Kingdom
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.1 MB)
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Language: English
Published: Frontiers Media, 2020
Publish Date: 2020-08-25


Aluminosilicate glasses are materials with a wide range of technological applications. The field strength of network-modifying cations strongly influences the structure of aluminosilicate glasses and their suitability for various applications. In this work, we study the influence of the field strength of network-modifying cations on the structure of [(Na₂O)1–x(MgO)ₓ(Al₂O₃)0·25(SiO₂)1·25] glasses. Due to the higher cation field strength of magnesium than sodium, magnesium prefers the role of network modifier, while sodium preferentially acts as a charge compensator. When magnesium replaces sodium as network modifier, Q³ silicon species are converted into Q² species. The replacement of sodium with magnesium as charge compensator leads to the following changes: (1) the proportion of aluminum-rich Q⁴ species [Q⁴(4Al) and Q⁴(3Al)] decreases, while the proportion of aluminum-deficient Q⁴ species [Q⁴(2Al) and Q⁴(1Al)] increases; and (2) there is an increased tendency for phase separation between silica-rich and alumina-rich glasses.

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Series: Frontiers in materials
ISSN: 2296-8016
ISSN-E: 2296-8016
ISSN-L: 2296-8016
Volume: 7
Article number: 267
DOI: 10.3389/fmats.2020.00267
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
116 Chemical sciences
Funding: We gratefully acknowledge the financial support received from European Union’s Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie COFUND Grant Agreement No. 713606 (I4Future MSC-COFUND). AK and V-VT acknowledge the financial support from Kvantum Institute (University of Oulu) and Academy of Finland (Grants #289649 and 294027). PK acknowledges financial support from Academy of Finland (Grants #322085, #326291, and #329477).
EU Grant Number: (713606) I4FUTURE - Novel Imaging and Characterisation Methods in Bio, Medical, and Environmental Research and Technology Innovations
Academy of Finland Grant Number: 289649
Detailed Information: 289649 (Academy of Finland Funding decision)
294027 (Academy of Finland Funding decision)
322085 (Academy of Finland Funding decision)
326291 (Academy of Finland Funding decision)
329477 (Academy of Finland Funding decision)
Copyright information: © 2020 Sreenivasan, Kinnunen, Adesanya, Patanen, Kantola, Telkki, Huttula, Cao, Provis and Illikainen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.