论文标题
硅酸盐玻璃中的离子交换：质量平均扩散系数确定
Ion exchange in silicate glass: mass average interdiffusion coefficient determination
论文作者
论文摘要
质量平均扩散系数DM是扩散系数的近似恒定值，这与硅酸盐玻璃中离子交换的动力学相关。在这项研究中，基于离子交换后的玻璃样品的重量变化，为其确定的简单技术提供了一种简单的技术。该方法的理论基础是详细介绍的，并在考虑DM的恒定物中假定的近似值。实验结果是针对苏打石硅酸盐玻璃的，并且证明了DM与Arrhenius型方程与能量激活屏障和指数前因子后DM与离子交换温度的相关性。确定质量平均扩散系数的确定允许当由于离子交换而堆积应力曲线时，估计压缩层深度。压缩层深度的估计值已与基于差分表面折射率（DSR）的光学技术测量的值进行了比较。已经发现值与DSR方法指示的不确定性限制兼容。
The mass average interdiffusion coefficient DM is an approximated constant value of the interdiffusion coefficient which is relevant in the kinetics of ion exchange in silicate glasses. In this study, it is presented a simple technique for its determination based on the weight change of a glass sample after ion exchange. The theoretical basis of the method is presented in detail together with the approximations assumed in considering the constancy of the DM . Experimental results are presented for soda-lime silicate glasses and it is demonstrated the correlation of DM with the ion exchange temperature following an Arrhenius-type equation with an energy activation barrier and a pre-exponential factor. The determination of the mass average interdiffusion coefficient allows the estimation of the compression layer depth when a stress profile is build-up as a consequence of ion exchange. The estimated values of the compression layer depth have been compared with the ones measured by an optical technique based on differential surface refractometry (DSR). Values have been found quite compatible with the uncertainty limits indicated by the DSR method.
