离子交换工艺对ESP玻璃的影响

使用两步离子交换法制备工程应力分布玻璃( ESP玻璃)。两步离子交换中第一步交换时间较长,第二步交换时间较短。主要研究经过不同第一步离子交换工艺制度后的ESP玻璃性能上的区别。本文对ESP玻璃测试了弯曲强度,显微硬度,K+分布状态,并根据弯曲强度,K+分布状态计算得出Weibull模量以及离子扩散系数。结果表明：第二步离子交换会降低第一步离子交换玻璃的弯曲强度,而两步离子交换后的ESP玻璃其Weibull模量有所升高。显微硬度趋势与弯曲强度趋势一致。结合抗折强度以及K+分布状态,可知第一步离子交换最佳温度为450℃,时间30 h；第二步离子交换最佳温度为400℃,时间33 min。

Effect of Ion Exchange Process on ESP Glass

Two step ion-exchanged method for preparing engineered stress profile glass ( ESP glass ) is used in this paper. The first step ion-exchanged time is longer than the second step ion-exchanged time in the two step ion-exchanged method. The difference in the performance of ESP glass after different first step ion-exchanged process is studied. In this paper, the ESP glass is tested by the bending strength test, micro hardness test, EPMA test. Weibull modulus could be calculated by the bending strength, and the ion diffusion coefficient could be calculated by the K ion distribution. The results show:the second step ion-exchanged could reduce the bending strength of the first step ion-exchanged glass. But after the two step ion-exchanged process, ESP glass has a higher Weibull modulus. The trend of micro hardness is consistent with the trend of bending strength. Combined with the bending strength and K ion distribution, the best temperature of the first step ion-exchanged is 450℃, and the time is 30 h. The second step ion-exchanged temperature is 400 ℃, and the time is 33 min.