J. Korean Ceram. Soc. > Volume 52(2); 2015 > Article
 Journal of the Korean Ceramic Society 2015;52(2): 137. doi: https://doi.org/10.4191/kcers.2015.52.2.137
 Influence of Molten KNO3 Flow Conditions on Mechanical Properties during Fabrication of Chemically-Toughened Glass Dong-Hwan Kim, Jee-Hun Maeng, Dami Kim, Sung-Churl Choi1, Hyeong-Jun Kim Korea Institute of Ceramic Engineering & Technology (KICET)1Division of Materials Science and Engineering, Hanyang University ABSTRACT In this study, we examined the influence of molten $KNO_3$ flow on mechanical properties and their deviation when a chemical toughening process was applied to soda lime silicate glass ($Na_2O-CaO-SiO_2$). $KNO_3$ melt flow was controlled using three methods: (1) glass tray rotation, (2) impeller stirring, and (3) natural convection. DOL and hardness were found to be enhanced by tray rotation because this rotation was able to maintain the concentration around the glass surface, in contrast to other methods. However, there did not appear to be a statistically significant difference in the 3-point bending strength for the three flow conditions due to the ground edge condition. Key words: Ion exchange, Chemically-strengthened glass melt flow, Deviation, Soda lime silicate glass
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