充填蓝宝石用SiO_2-TiO_2-RO-R′_2O系列玻璃的性能  

Performance of SiO_2-TiO_2-RO-R′_2O System of Glass for Sapphire Filling

作　　者：朱嘉婉 王以群[1] 黄月霞[1] 邹培玲 吴晓玉 ZHU Jia-wan;WANG Yi-qun;HUANG Yue-xia;ZOU Pei-ling;WU Xiao-yu(School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学材料科学与工程学院,上海200237 [2]华东理工大学机械与动力工程学院,上海200237

出　　处：《华东理工大学学报（自然科学版）》2018年第2期219-222,共4页Journal of East China University of Science and Technology

摘　　要：设计并熔制了作为蓝宝石充填材料用的SiO_2-TiO_2-RO-R′_2O(其中R代表二价碱金属离子Ba^(2+)、Zn^(2+),R′代表一价碱金属离子Na^+、K^+)系列玻璃。通过对玻璃的物理性能(密度和折射率)、热稳定性(玻璃化转变温度和析晶温度)以及玻璃骨架结构的探讨,研究了混合碱效应对玻璃性能的影响。结果表明,该系列玻璃在n(Na^+)∶n(K^+)=2∶3时,其密度、折射率等物理性能符合蓝宝石充填要求,且热稳定性强,充填过程不容易发生析晶,可作为蓝宝石充填材料。Sapphire,ruby,diamond,emerald and golden emerald are the five most precious stones in the world.The resources of sapphire are depleting because of continuous mining.Madagascar sapphire has gradually been recognized since 1990s.Madagascar sapphire is almost in commercial grade,and very little in gem grade depending on the color and purity.High refractive index lead glass is widely used in gemstone filling as a filler material.However,long-term use of lead glass will cause adverse factors to human health.Therefore,the aim of this paper is to discover a type of lead-free high refraction glass as a sapphire filling material.A new glass system is designed and prepared for sapphire filling in this work.The glass system is SiO 2-TiO 2-RO-R′2 O with different molar ratios of Na 2O/K 2O(R represents alkaline earth and R′represents alkali).Different properties of this new glass system are studied such as physical performance(density and refractive index),thermal performance(glass-transition temperature T g and recrystallization temperature T x),thermal stability and skeleton structure of the glass.The effects of these factors on the performance of glass are also discussed.According to the current results,the density and refractive index meet the requirement of sapphire filling when n(Na+)∶n(K+)=2∶3 in this glass system.Meanwhile,its thermal stability is very high and the filling process does not cause crystallization easily.Therefore,such type of glass can be used as a sapphire filling material.

关 键 词：蓝宝石充填材料 钛硅酸盐玻璃 混合碱效应 

分 类 号：TQ171.79[化学工程—玻璃工业] P619.28[化学工程—硅酸盐工业]