碱钙硅系统晶质玻璃组成对物化性能的影响  

Effect of Components on the Physico-chemical Properties in R_2O-CaO-SiO_2 Crystal Glass

作　　者：汤李缨[1] 范少群[1] 

机构地区：[1]武汉理工大学硅酸盐工程教育部重点实验室,武汉430070

出　　处：《武汉理工大学学报》2010年第22期48-51,共4页Journal of Wuhan University of Technology

摘　　要：研究了Na2O/K2O、CaO/BaO、TiO2/SiO2对R2O-CaO-SiO2系统晶质玻璃折射率、透过率、密度及化学稳定性的影响,利用拉曼光谱分析探讨了TiO2含量变化对玻璃结构的影响,制备了nD为1.590 6的晶质玻璃。结果表明：当Na2O/K2O摩尔比值为0.5~3.8,随着比值的增大,玻璃折射率和密度逐渐增大,但玻璃的透过率和耐水性略有下降,耐碱性先增大后减小;当CaO/BaO摩尔比值为0.7~6.8,随着比值的减小,折射率和密度均呈递增趋势,BaO的增加可提高透过率;当TiO2/SiO2摩尔比值为0.024~0.12,随着比值的增大,折射率和密度均大幅度提高,透过率先增大后减小,对耐水性有明显的促进作用,Ti4＋以[TiO4]形式进入网络结构,且[TiO4]伸缩振动峰变强并呈现向低波数区移动的趋势。The effect of refractive index,transmittance,density and chemical stability were studied in the R2O-CaO-SiO2 crystal glass with the changing of Na2O/K2O,CaO/BaO,TiO2/SiO2.Raman spectrum was used to analyze and investigate the structure of the glass with different contents of TiO2.And finally a kind of crystalline glass whose nD is 1.590 6 was prepared.The experiment results showed that when the molar ratio of Na2O/K2O was between 0.5～3.8,nD and the density increased gradually with the rising of it while the glass transmittance and water resistance declined,and alkali resistance fell after it increased firstly.When the molar ratio of CaO/BaO was between 0.7～6.8,with the declining of the ratio,nD and the density presented an increasing trend.The adding of BaO had an active effect on the transmittance.When the molar ratio of TiO2/SiO2 was between 0.024～0.12,nD and the density were improved quickly with the rising of the ratio.Its transmittance increased first but then declined.What＇s more,it had a distinct promotion on the water resistance.As TiO2 increased and SiO2 decreased,Ti4＋ went into the network structure in the form of tetrahedron.What＇s more,the intensity of TiO2＇s telescopic vibration peak would grow stronger and present a tread of moving to lower wave number when the content of TiO2 continued increasing.

关 键 词：R2O-CaO-SiO2系统 折射率 密度 化学稳定性 结构 

分 类 号：TQ171[化学工程—玻璃工业]