TiO_2和CaF_2对高炉渣基础玻璃微观结构和高温粘度的影响  

Effect of TiO_2 and CaF_2 on the Microstructure and High-Temperature Viscosity of Parent Glass from Blast Furnace Slag

作　　者：谢春帅 贵永亮 王亚文 宋春燕 胡宾生 

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063009

出　　处：《陶瓷学报》2016年第5期516-520,共5页Journal of Ceramics

基　　金：国家自然科学基金(项目号51404087)

摘　　要：以高炉渣为主要原料,添加适当的SiO_2、Al_2O_3、MgO、ZnO、K_2CO_3、Na_2CO_3、TiO_2、CaF_2等化学试剂作为辅助材料,采用熔融法制备了高炉渣基础玻璃。通过拉曼光谱和熔体物性测定仪分析了TiO_2和CaF_2对高炉渣基础玻璃微观结构和高温粘度的影响。结果显示随着TiO_2含量的增加,Si^(4+)逐步被Ti^(4+)取代,使非桥氧数目增加,拉曼峰向低波数移动。CaF_2中的F-取代硅氧四面体中的O^(2-),硅氧四面体断裂,使拉曼峰降低。TiO_2和CaF_2均能降低基础玻璃高温粘度,有利于基础玻璃的熔制,同时增加了基础玻璃对热的不稳定性,有利于基础玻璃的形核析晶形成微晶玻璃。Parent glass was prepared successfully by the method of melting, using blast furnace slag as main source of raw materials, andSiO2, Al2O3, MgO, ZnO, K2CO3, Na2CO3, TiO2 and CaF2 as auxiliary materials. The microstructure and high-temperature viscosity of parentglass were investigated by the Raman spectra and high-temperature melt properties tester. The results showed that with the increase of TiO2content in parent glass more Si4＋ was replaced by Ti4＋, which led to an increased amount of non-bridging oxygen and the movement of theRaman peaks to lower wave number. F- tended to occupy the place of O2- in parent glass with the increasing of CaF2 content. As a result,silicon oxygen tetrahedron fractured and the intensity of the Raman spectra lowered. The presence of TiO2 and CaF2 was beneficial for thehomogeneity of parent glass due to the decreasing of the viscosity of liquid glass, but it also increased the thermal instability of parent glass,which was helpful for nucleation and crystallization of glass ceramics.

关 键 词：基础玻璃 拉曼光谱 微观结构 高温粘度 

分 类 号：TQ174.75[化学工程—陶瓷工业]