Mechanical–Structural Investigation of Chemical Strengthening Aluminosilicate Glass through Introducing Phosphorus Pentoxide

Huidan Zeng,Feng Ye,Luyi Sun,Bin Yang,Guorong Chen,Jianding Chen,Ling Wang

doi:10.3389/fmats.2016.00053

Huidan Zeng, Feng Ye + Show 5 more

Open Access

https://doi.org/10.3389/fmats.2016.00053

Copy DOI

Abstract

Chemical strengthening of aluminosilicate glasses through K+-Na+ ion exchange has attracted tremendous attentions because of the accelerating demand for high strength and damage resistance glasses. However, a paramount challenge still exists to fabricate glasses with a higher strength and greater depth of ion-exchange layer. Herein, aluminosilicate glasses with different contents of P2O5 were prepared and the influence of P2O5 on the increased compressive stress and depth of ion-exchange layer was investigated by micro-Raman technique. It was noticed that the hardness, compressive stress, as well as the depth of ion-exchange layer substantially increased with an increasing concentration of P2O5 varied from 1 to 7 mol%. The obtained micro-Raman spectra confirmed the formation of relatively depolymerized silicate anions that accelerated the ion exchange. Phosphorus containing aluminosilicate glasses with a lower polymerization degree exhibited a higher strength and deeper depth of ion-exchange layer, which suggests that the phosphorus containing aluminosilicate glasses have promising applications in flat panel displays, windshields, and wafer sealing substrates.

Highlights

The development of ultrathin, high strength, and damage resistance glasses for flat panel displays, windshields, and wafer sealing substrates is an ongoing challenge (Wondraczek et al, 2011; Käfer et al, 2013; Mauro et al, 2016)
The depth of ion-exchange layer (DOL) and diffusion coefficients of ion-exchanged xP2O5– (100 − x)(0.25Na2O–0.08Al2O3–0.67SiO2) (x = 5) glass treated at 400°C for different ion-exchange times and different ion-exchange temperatures for 6 h are shown in Figures 1A,B, respectively
It is noteworthy that the DOL for such glasses is higher or comparable with some commercial glasses (Wang et al, 2008; Stavrou et al, 2014), which is desirable for chemically strengthened glasses

Summary

Introduction

The development of ultrathin, high strength, and damage resistance glasses for flat panel displays, windshields, and wafer sealing substrates is an ongoing challenge (Wondraczek et al, 2011; Käfer et al, 2013; Mauro et al, 2016). Strengthened aluminosilicate glasses through K+–Na+ ion exchange are currently receiving significant interest due to their excellent mechanical properties (Chang et al, 2014). The diffusion coefficient and activation energy Ea of ion-exchanged xP2O5–(100 − x)(0.25Na2O– 0.08Al2O3–0.67SiO2) (x = 5) glass treated at 400°C for different ion-exchange times and different ion-exchange temperatures for 6 h were calculated.

Results

Conclusion