Vibrational study of thermally ion-exchanged sodium aluminoborosilicate glasses

TY - JOUR

T1 - Vibrational study of thermally ion-exchanged sodium aluminoborosilicate glasses

AU - Stavrou, E.

AU - Palles, D.

AU - Kamitsos, E. I.

AU - Lipovskii, A.

AU - Tagantsev, D.

AU - Svirko, Y.

AU - Honkanen, S.

N1 - Funding Information: Support of this work by the ERA.Net RUS project AN2 (EU/FP7), the General Secretariat for Research and Technology , Greece (project 12RUS-11-206), the Russian Foundation for Basic Research (project 12-02-91664) and the Academy of Finland (project 267270) is gratefully acknowledged.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - Thermally ion-exchanged M+-for-Na+ (M = K and Ag) aluminoborosilicate glasses were obtained from the glass (SiO2) 60(B2O3)10(Al2O 3)6(Na2O)20.2(ZrO2) 3.7(Sb2O3)0.1 (in mol%) and studied by infrared reflectance and micro-Raman spectroscopy. The results of both techniques are consistent with local structural rearrangements induced by ion-exchange below glass transition temperature, Tg, and are expressed for the silicate network by the chemical equilibrium Q2 + Q4⇔2Q3 where Qn represents a silicate tetrahedron with n bridging oxygen atoms. Replacement of Na+ by K+ was found to shift this equilibrium to the right, while the introduction of Ag+ ions causes the opposite effect. Micro-Raman depth profiling showed that these structural changes occur within a layer whose thickness depends on the type of the guest cation and the conditions of ion-exchange; the thickness is about 50 μm for Ag+ ions exchanged at 340 °C for 180 min and about 40 μm for K+ exchanged at 325°C for 6 h.

AB - Thermally ion-exchanged M+-for-Na+ (M = K and Ag) aluminoborosilicate glasses were obtained from the glass (SiO2) 60(B2O3)10(Al2O 3)6(Na2O)20.2(ZrO2) 3.7(Sb2O3)0.1 (in mol%) and studied by infrared reflectance and micro-Raman spectroscopy. The results of both techniques are consistent with local structural rearrangements induced by ion-exchange below glass transition temperature, Tg, and are expressed for the silicate network by the chemical equilibrium Q2 + Q4⇔2Q3 where Qn represents a silicate tetrahedron with n bridging oxygen atoms. Replacement of Na+ by K+ was found to shift this equilibrium to the right, while the introduction of Ag+ ions causes the opposite effect. Micro-Raman depth profiling showed that these structural changes occur within a layer whose thickness depends on the type of the guest cation and the conditions of ion-exchange; the thickness is about 50 μm for Ag+ ions exchanged at 340 °C for 180 min and about 40 μm for K+ exchanged at 325°C for 6 h.

KW - Glass structure

KW - Infrared

KW - Ion-exchange

KW - Raman

UR - http://www.scopus.com/inward/record.url?scp=84905714956&partnerID=8YFLogxK

U2 - 10.1016/j.jnoncrysol.2013.12.017

DO - 10.1016/j.jnoncrysol.2013.12.017

M3 - 文章

AN - SCOPUS:84905714956

SN - 0022-3093

VL - 401

SP - 232

EP - 236

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

ER -