摘要
在工业纯KNO3中分别添加KOH,K3PO4,K2CO3,K2SiO3与Al2O3的混合物,研究了熔盐添加剂对浮法玻璃离子交换和增强的影响。用电子探针测试了玻璃表面的K+浓度;测定了样品的表面应力、弯曲强度和显微硬度。结果表明:上述添加剂可以增加离子交换层深度,缩短离子交换时间,明显提高玻璃的力学性能,其增强效果与分析纯KNO3的增强效果相当,甚至比后者好;在交换温度为450℃下,玻璃交换层厚度大于29μm,玻璃的力学性能为:表面应力>480MPa,弯曲强度>400MPa,显微硬度为6.49GPa。
The effect of additives in molten salt on the ion exchange and strengthening of float glass was investigated in the commercial purity KNO3 or the mixtures of KNO3 with the addition of KOH, K3PO4, K2CO3, K2SiO3 and Al2O3, respectively. Potassium concentration profiles of glass were measured by electron probe micro-analysis. The surface stress, bending strength and micro-hardness of glass samples were tested. The results show that these additives can deepen the ion exchange layer and shorten the ion exchange time, hence significantly improving the mechanical properties of the glass. The strengthening effect of the mixtures is as good as, or even better than, that of analytically pure KNO3. At the treatment temperature of 450 ℃, the thickness of the ion exchange layer on the glass surface is more than 29 μm, and the mechanical properties of the glass with the ion exchange layer are as follows： surface stress 〉485 MPa, bending strength 〉400 MPa and micro-hardness 6.49 GPa.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2009年第5期851-854,共4页
Journal of The Chinese Ceramic Society
基金
科技部国际科技合作(2005DFBA0009)资助项目
关键词
玻璃
离子交换
增强
添加剂
glass
ion exchange
strengthening
additive
