摘要
采用熔融冷却法制备了不同R'系数的高硼硅酸盐玻璃,其中R'=(Na2O-Al2O3)/B2O3。利用红外光谱、高温旋转粘度计和热膨胀仪等对玻璃的结构和性能进行表征。结果表明:高温段粘度-温度关系符合阿伦尼乌斯定律;R'值的增大导致非桥氧的增加,高温粘度和熔制温度呈显著降低。当R'>0.5时,热膨胀系数近似线性增大,玻璃化转变温度增大至590℃基本维持不变。R'值影响结构中的[BO3]与[BO4]的比例及硅氧网络的完整程度,从而决定高硼硅酸盐玻璃的性能。
Silica-rich sodium borosilicate glasses with varying R＇ values have been prepared using conventional melt quenching method,where R＇ represents the ratio of（Na2O-Al2O3） and B2O3.The structure and properties have been investigated by the FTIR spectra,rotating crucible viscometer and thermal expanse dilatometer.The results show that the viscosity dependence of temperature is accord with Arrhenius law in the high temperature range.The non-bridging oxygen increases due to the increase of R＇,which leads to obvious decease of high temperature viscosity and melting temperature.Thermal expanse coefficient increases linearly with R＇ when R＇ exceeds 0.5,and the glass transformation temperature increases to 590 ℃.The fraction of [BO3]and[BO4]and the integrity of Si-O network are controlled mainly by R＇,then decide properties of borosilicate glasses.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第6期1022-1025,共4页
Bulletin of the Chinese Ceramic Society
关键词
高硼硅玻璃
R'值
粘度
热膨胀
Silica-rich borosilicate glass
R＇ value
Viscosity
Thermal expansion
