SrO/CaO比对无碱铝硼硅酸盐玻璃热膨胀系数与低温特征粘度参考点的影响  

Effects of the Ratio of SrO/CaO on the Coefficient of Thermal Expansion and Low Temperature Characteristic Viscosity Reference Points of Alkali-free Boro-aluminosilicate Glasses

作　　者：程金树[1] 田英良[1] 张磊[2] 孙诗兵[2] 

机构地区：[1]武汉理工大学,湖北武汉430070 [2]北京工业大学,北京100124

出　　处：《材料科学与工程学报》2012年第1期98-101,共4页Journal of Materials Science and Engineering

摘　　要：恒定无碱铝硼硅酸盐玻璃中碱土金属氧化物的质量百分比不变,研究了SrO和CaO的相互替代对玻璃的热膨胀系数、应变点温度、玻璃转变温度、退火点温度、膨胀软化点温度等低温特征粘度参考点的影响。结果表明:玻璃的热膨胀系数随着n(SrO)/n(CaO)比值的增大而逐渐减小,低温特征粘度参考点在n(RO)/n(Al2O3)=0.96时达到极大值。The effects of substitution of SrO for CaO by fixing weight percent of alkaline-earth oxides in alkali-free boro-aluminosilicate glasses on the coefficient of thermal expansion （CTE） and low temperature characteristic viscosity reference points such as the strain point, glass transformation temperature, annealing point and dilatometric softening point were studied. The results show that CTE decreases with increasing the ratio of n（SrO）/n（CaO）, and the low temperature characteristic viscosity reference points achieve a maximum value when n（RO）/n（Al2O3 ）=0.96.

关 键 词：无碱铝硼硅酸盐玻璃 碱土金属氧化物 热膨胀系数 低温特征粘度参考点 

分 类 号：TQ171.112[化学工程—玻璃工业]