SiO_(2)含量对钛矿渣微晶玻璃晶化行为的影响  

Effect of SiO_(2) Content on Crystallization Behavior of Titanium Slag Glass-Ceramics

作　　者：周明凯[1] 林方亮 陈立顺[1] 王怀德[1] 陈潇[1] ZHOU Mingkai;LIN Fangliang;CHEN Lishun;WANG Huaide;CHEN Xiao(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

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：《硅酸盐通报》2022年第4期1133-1140,1147,共9页Bulletin of the Chinese Ceramic Society

摘　　要：以钛矿渣为主要原料,采用熔融法制备CaO-MgO-Al_(2)O_(3)-SiO_(2)系微晶玻璃,通过综合热分析仪、X射线衍射仪和扫描电子显微镜分析了SiO_(2)含量对钛矿渣微晶玻璃的基础玻璃稳定性及晶化行为的影响。结果显示:以原渣制备微晶玻璃时,其基础玻璃结构不稳定,易析出钙钛矿晶体,随着SiO_(2)含量的增加,基础玻璃趋于稳定,析晶温度上升,热处理后析晶程度更高,显微结构更加致密,因而强度更高。通过加入辅助原料石英粉来调节SiO_(2)含量,当SiO_(2)含量为40%(质量分数)时,可以制备出具有稳定玻璃体、晶相仅为透辉石、抗弯强度为82.1 MPa的微晶玻璃,其钛矿渣掺量在80%(质量分数)以上,具有重要的经济与社会效应。Using titanium slag as the main raw material,the CaO-MgO-Al_(2)O_(3)-SiO_(2) series glass-ceramics were prepared by the melting method.Through integrated thermal analyzer,X-ray diffractometer,and scanning electron microscopy,the effect of SiO_(2) content on the stability and crystallization behavior of the base glass of titanium slag glass-ceramics was analyzed.The results show that when the original slag is used to prepare glass-ceramics,the structure of the basic glass is unstable,and perovskite crystals are easy to precipitate.With the increase of SiO_(2) content,the basic glass tends to be stable,the crystallization temperature increases,and the degree of crystallization after heat treatment becomes higher,the microstructure is denser and therefore the strength is higher.The SiO_(2) content is adjusted by adding the auxiliary raw material quartz powder.When the SiO_(2) content is 40%(mass fraction),glass-ceramics with stable glass body,crystal phase only diopside,and bending strength of 82.1 MPa are prepared.The content of titanium slag is more than 80%(mass fraction),which has important economic and social effects.

关 键 词：钛矿渣 微晶玻璃 玻璃稳定性 晶化行为 抗弯强度 透辉石 

分 类 号：TQ171[化学工程—玻璃工业]