Effect of Na+ Concentration on Properties of Chemical Strengthened Sodium Aluminosilicate Glass

Abstract

Abstract: Marginal Na⁺ concentration in molten salt has not significant effects on ion-exchange process of glass. However, when the Na⁺ concentration in the molten salt continues to increase, the performance of chemical strengthened sodium aluminosilicate glass begins to be affected. To overcome this issue, one-step ion-exchange process was developed to reaserch chemical strengthened sodium aluminosilicate glass with different thickness. Effect of Na⁺ concentration in molten salt on surface compressive stress, depth of layer and bending strength of chemical strengthened sodium aluminosilicate glass were investigated. The results demonstrate that the surface compressive stress and bending strength of chemical strengthened sodium aluminosilicate glass decrease when the Na⁺ concentration in molten salt increases. The bending strength decreases by up to 175 MPa, while the surface compressive stress decreases by 57.4 MPa. The change of Na⁺ concentration in molten salt has not obviously effects on the depth of layer and visible light transmittance of chemical strengthened sodium aluminosilicate glass.

Key words: sodium aluminosilicate glass, Na⁺ concentration, ion-exchange, bending strength, interdiffusion coefficient of ion, semi-infinite diffusion model

CLC Number:

TQ171

TIAN Haodong, XU Chi, WU Zhiyuan, ZHOU Shaojun, ZU Chengkui. Effect of Na⁺ Concentration on Properties of Chemical Strengthened Sodium Aluminosilicate Glass[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(11): 3945-3951.

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Effect of Na⁺ Concentration on Properties of Chemical Strengthened Sodium Aluminosilicate Glass

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