Na_2O对硼硅酸盐玻璃熔体性质的影响  

Effects of Na_2O on the Melt Properties of Borosilicate Glass

作　　者：王琳琳[1] 何峰[1] 梅书霞[1] 金明芳[1] 谢峻林[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《武汉理工大学学报》2015年第6期12-18,共7页Journal of Wuhan University of Technology

基　　金："十二五"国家科技支撑计划(2012BAA08B04)

摘　　要：硼硅酸盐玻璃具有良好的热稳定性、电绝缘性、化学稳定性、机械性能和光学性能等。采用熔融冷却法制备了不同Na2O含量的高硼硅酸盐玻璃,利用高温旋转粘度计和高温显微镜对玻璃的熔体性质进行表征。利用AM方程拟合玻璃转变温度至熔化温度的粘度-温度曲线,考查R(R=Na2O/B2O3)对硼硅酸盐玻璃料性等熔体性能的影响,结果表明:R的增大,显著地降低了硼硅酸盐玻璃的高温粘度与对应的熔制温度,R由0.38增大到0.50时,对应的熔体熔制温度由1 841.99℃降至1 783.81℃。比较了VFT、AG方程、AM方程、Mauro方程在拟合玻璃转变温度至熔制温度的粘度-温度曲线的适用性,AM方程拟合误差最小。运用AM方程,得出了硼硅酸盐的料性变化规律。R的增大缩短了硼硅酸盐玻璃的料性,有利于快速成形。Borosilicate glass has many good properties,such as good thermal stability,electrical insulation,chemical stability,mechanical properties and optical properties,etc.Samples with different contents of Na2 O were prepared by melt-quenching method,and the properties of the melted glass were analyzed by a high temperature rotary viscometer and a high temperature microscope.The viscosity-temperature curves varying from glass transition temperature to the melting temperature were achieved by the AM equation fitting（to research the effect of R on properties of the melted glass including the workability）.Effects of the R（R=Na2O/B2O3）on the borosilicate glass melt properties,such as workability,were investigated.The experimental results showed that with the increase of R,the high temperature viscosity of borosilicate glass and the corresponding melting temperature decreased significantly,for example,the corresponding melting temperature declined from 1 841.99 ℃ to 1 783.81 ℃ when the Rincreased from 0.38 to 0.50.The applicability of VFT,AG equation,AM equation and Mauro equation in the fitting of viscosity-temperature curves from glass transition temperature to the melting temperature were compared,which shows that the AM equation fitting is one of the most suitable methods.The workability of borosilicate was gotten by the AM equation.The workability of borosilicate glass was shorten with the increase of R,which benefits the rapid prototyping.

关 键 词：硼硅酸盐玻璃 R值 粘度 润湿 

分 类 号：TQ173[化学工程—搪瓷工业]