In this study, sodium exchange for caesium in a mixed alkali lime silicate glass was carried out using electric field-assisted ion exchange (EF-IE). Na/Cs exchange was realised by applying electric fields up to 2000 V cm−1 for 5 min on glass tubes immersed in molten CsNO3 at 460 °C. The chemical concentration profiles measured near the glass surface showed a bilayer concentration profile which comprises caesium and potassium-rich layers, the formation of the potassium-rich layer being associated with the different mobility of alkali ions. Nanoindentation analysis outlined that surface layer produced by Na/Cs ion-exchange is characterised by poorer mechanical properties than Na/K ion-exchanged layer. Raman spectroscopy investigation revealed that the Na/ Cs ion-exchanged layer has a denser structure with respect to raw glass, this being responsible for the different mechanical properties.

Sodium-caesium electric field assisted ion exchange in a mixed-alkali (Na, K) lime silicate glass / Talimian, Ali; Scardi, Paolo; Sglavo, Vincenzo M.. - In: JOURNAL OF NON-CRYSTALLINE SOLIDS. - ISSN 0022-3093. - ELETTRONICO. - 550:(2020), p. 120390. [10.1016/j.jnoncrysol.2020.120390]

Sodium-caesium electric field assisted ion exchange in a mixed-alkali (Na, K) lime silicate glass

Talimian, Ali;Scardi, Paolo;Sglavo, Vincenzo M.
2020

Abstract

In this study, sodium exchange for caesium in a mixed alkali lime silicate glass was carried out using electric field-assisted ion exchange (EF-IE). Na/Cs exchange was realised by applying electric fields up to 2000 V cm−1 for 5 min on glass tubes immersed in molten CsNO3 at 460 °C. The chemical concentration profiles measured near the glass surface showed a bilayer concentration profile which comprises caesium and potassium-rich layers, the formation of the potassium-rich layer being associated with the different mobility of alkali ions. Nanoindentation analysis outlined that surface layer produced by Na/Cs ion-exchange is characterised by poorer mechanical properties than Na/K ion-exchanged layer. Raman spectroscopy investigation revealed that the Na/ Cs ion-exchanged layer has a denser structure with respect to raw glass, this being responsible for the different mechanical properties.
Talimian, Ali; Scardi, Paolo; Sglavo, Vincenzo M.
Sodium-caesium electric field assisted ion exchange in a mixed-alkali (Na, K) lime silicate glass / Talimian, Ali; Scardi, Paolo; Sglavo, Vincenzo M.. - In: JOURNAL OF NON-CRYSTALLINE SOLIDS. - ISSN 0022-3093. - ELETTRONICO. - 550:(2020), p. 120390. [10.1016/j.jnoncrysol.2020.120390]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/276365
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