摘要
用高温熔融法制备了Al_2O_3/SiO_2比变化的无碱铝硼硅酸盐玻璃。固定无碱铝硼硅酸盐玻璃体系中SiO_2与Al_2O_3总量不变,研究了用Al_2O_3替代SiO_2对玻璃的熔化温度、成型温度、退火点、应变点等特征黏度参考点的影响;通过红外光谱和Raman光谱研究其结构变化。结果表明:随着铝硅比n(Al_2O_3/SiO_2)逐渐增加,玻璃网络中非桥氧减少,导致退火点(Ta)和应变点(Tst)不断升高;同时,在高温下,熔化温度(Tm)和成型温度(Tf)呈现下降趋势。
Alkali-free boroaluminosilicate glasses with different ratios of Al2O3/SiO2 were prepared by high temperature fusion method. The effects of substitution of Al2O3 for SiO2 by fixing mole percent of SiO2 and Al2O3 in alkali-free boro-aluminosilicate glasses on the reference point of viscosity-temperature characteristics such as glass melting temperature,forming temperature,annealing point and strain point were studied. The structure change of these glasses was analyzed by infrared and Raman spectroscopy. The results indicate that the non-bridging oxygens（NBOs） were found decrease in the glass network with an increase in the ratio of n（Al2O3/SiO2）. The results indicate that the non-bridging oxygens（NBOs） decreases in the glass network with increasing of n（Al2O3/SiO2）. This change results in increasing of the annealing point（Ta） and strain point（Tst） gradually and decreasing of the melting temperature（Tm） and forming temperature（Tf） at high temperature region.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2017年第10期1516-1522,共7页
Journal of The Chinese Ceramic Society
基金
国家科技支撑计划(2013BAE03B02-03)项目
关键词
无碱玻璃
铝硼硅酸盐玻璃
铝硅比
玻璃结构
黏温特性
alkali-free glass
boro-aluminosilicate glass
Al2O3/SiO2 ratio
glass structure
viscosity-temperature characteristics
