熔盐中少量的Na+并不会对玻璃的离子交换效果产生明显影响，但当熔盐中Na+浓度不断增大时，化学增强钠铝硅酸盐玻璃的性能开始受到影响。本文采用一步法离子交换工艺研究了熔盐中Na+浓度对不同厚度化学增强钠铝硅酸盐玻璃表面压应力、应力层深度和弯曲强度等性能的影响。研究表明：熔盐中Na+浓度不断增大时，化学增强钠铝硅酸盐玻璃的表面压应力、弯曲强度下降；弯曲强度下降最多可达175 MPa，此时玻璃的表面压应力下降了57.4 MPa；熔盐中Na+浓度变化未对化学增强钠铝硅酸盐玻璃的应力层深度和可见光透过率产生明显影响。

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.