玻璃中Al_2O_3含量对离子交换增强性能的影响

Effect of Al_2O_3 Content on Performance of Ion-Exchanged Strengthening

为探究玻璃中铝含量对离子交换增强性能的影响,用硝酸钾熔盐对不同铝含量的成品玻璃进行了离子交换处理。用硬度仪、压力试验机和表面应力仪分别测量了离子交换前后玻璃的硬度、抗压强度和表面应力等性能,用X-射线光电子能谱(XPS)分析了离子交换前后玻璃表面的元素含量变化,并用EDS测试了离子交换后K+、Na+纵向浓度分布。研究表明,在Na2O含量近乎相等(13~14wt%)、同等离子交换条件下,Al2O3是影响离子交换效果的主要因素:Al2O3含量越高(在0.2~13.1wt%的范围内),离子交换层越深,表面应力越大,增强性能也越好。

In order to explore the effect of Al2O3 content on the ion-exchange strengthened performance in glass,several pieces of glass with different Al2O3 contents were processed in KNO3 molten salt for ionexchanging.Glass hardness,compressive strength and surface compressive stress were measured via microhardness tester,pressure testing machine and surface stress meter before and after the exchange,respectively.Element content changes on the glass surface before and after the exchange were analyzed by XPS.And EDS was also used to test the concentration of K+,Na+longitudinal distribution before and after the exchange.Research shows that under the condition of nearly equal Na2O content(13~14wt%)and same exchanged condition,Al2O3 content is the main factor which influences the ion exchange.The ion-exchanged depth,surface compression stress and strengthening performance all increase as the Al2O3 content increases within 0.2~13.1wt%.