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Chemical strengthening of Li+-containing phosphosilicate glass via a two-step ion-exchange process

Chemical strengthening of Li+-containing phosphosilicate glass via a two-step ion-exchange process Many studies have been conducted to improve the strength and damage resistance of phosphosilicate glasses via the introduction of Li2O through an appropriate ion-exchange process. However, very limited investigations can unveil the effect of the comprehensive mechanism of two-step ion-exchange process on the mechanical properties of glass. Increasing the amount of Li2O in phosphosilicate glasses increases the hardness and decreases the depth of ion-exchange layers of other alkali ions. With a two-step ion-exchange treatment, the hardness of glass has been enhanced by 28.3% on average. Moreover, the phosphosilicate glass system was found to achieve the maximum compression stress on optimizing the Li2O content for a glass surface after the two-step ion-exchange treatment. The mechanism of strengthening the mechanical properties was then described using atomic packing theory. This investigation will pave the way for efficient composition design for phosphosilicate glasses to meet mechanical performance requirements of various display-related and engineering applications. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Australian Ceramic Society Springer Journals

Chemical strengthening of Li+-containing phosphosilicate glass via a two-step ion-exchange process

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Publisher
Springer Journals
Copyright
Copyright © Australian Ceramic Society 2021
ISSN
2510-1560
eISSN
2510-1579
DOI
10.1007/s41779-021-00625-x
Publisher site
See Article on Publisher Site

Abstract

Many studies have been conducted to improve the strength and damage resistance of phosphosilicate glasses via the introduction of Li2O through an appropriate ion-exchange process. However, very limited investigations can unveil the effect of the comprehensive mechanism of two-step ion-exchange process on the mechanical properties of glass. Increasing the amount of Li2O in phosphosilicate glasses increases the hardness and decreases the depth of ion-exchange layers of other alkali ions. With a two-step ion-exchange treatment, the hardness of glass has been enhanced by 28.3% on average. Moreover, the phosphosilicate glass system was found to achieve the maximum compression stress on optimizing the Li2O content for a glass surface after the two-step ion-exchange treatment. The mechanism of strengthening the mechanical properties was then described using atomic packing theory. This investigation will pave the way for efficient composition design for phosphosilicate glasses to meet mechanical performance requirements of various display-related and engineering applications.

Journal

Journal of the Australian Ceramic SocietySpringer Journals

Published: Sep 1, 2021

Keywords: Phosphosilicate glasses; Ion-exchange process; Ion diffusion; Atomic packing theory

References