MgO-Al_2O_3-SiO_2-TiO_2-CeO_2微晶玻璃的相转变  

PHASE TRANSITION OF GLASS-CERAMICS FROM MgO-Al_2O_3-SiO_2-TiO_2-CeO_2 SYSTEM

作　　者：陈益坤[1] 罗澜[1] 陈玮[1] 张干城[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《硅酸盐学报》2003年第7期707-710,720,共5页Journal of The Chinese Ceramic Society

摘　　要：通过DTA ,XRD ,TEM ,SEM和EDS等测试手段 ,研究了MgOAl2 O3SiO2 TiO2 CeO2 微晶玻璃的相转变过程。研究结果表明 :退火后的原始玻璃已存在液相分离结构。在热处理过程中硅钛铈矿 (Ce2 Ti2 Si2 O1 1 )首先在 840℃从富含Ti4+ ,Ce4+ 的孤立液滴相中析出。金红石 (TiO2 )晶核于 95 0℃开始形成。α堇青石相在 114 0℃左右从富含Si4+ ,Al3+ 的玻璃相中大量生成。当温度升高到 12 0 5℃时 ,部分硅钛铈矿分解并与残余玻璃相反应生成金红石和新相氧化铈。通过控制晶化得到的MgOAl2 O3SiO2 TiO2 CeO2 微晶玻璃 ,其晶相由硅钛铈矿、金红石。The crystallization behavior of a glass from MgOAl 2O 3SiO 2TiO 2CeO 2 system was investigated by means of DTA, XRD, TEM, SEM and EDS. The results show that the parent glass is already two-phase separated. During heat treatment, perrierite (Ce 2Ti 2Si 2O 11), rutile (TiO 2) and αcordierite (Mg 2Al 4Si 5O 18) separate out sequentially at 840, 950, 1 140 ℃. When heating temperature is raised to 1 205 ℃, some of perrierite decomposes and reacts with residual glass, forming rutile and a new phase ceria. The glass-ceramics obtained by crystallizing of the MgOAl 2O 3SiO 2TiO 2CeO 2 glass are comprised of perrierite, rutile, αcordierite and few ceria.

关 键 词：徽晶玻璃 相转变 镁铝硅钛系 

分 类 号：TQ171[化学工程—玻璃工业]