PbBr_2-PbCl_2-PbF_2-PbO-P_2O_5系统玻璃形成特性的研究  

GLASS FORMATION IN THE PbBr2-PbCl2-PbF2-PbO-P2O5 SYSTEM

作　　者：朱冬梅[1] 周万城[1] 赵宏生[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室

出　　处：《硅酸盐学报》1999年第3期324-329,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金

摘　　要：研究了ＰｂＢｒ２－ＰｂＣｌ２－ＰｂＦ２－ＰｂＯ－Ｐ２Ｏ５系统的玻璃形成能力和系统的玻璃形成区，测试了一些玻璃的特征温度．结果表明：加入５％（摩尔分数，下同）ＰｂＯ和５％ＰｂＦ２都使玻璃转变温度升高，玻璃形成区缩小，并向ＰｂＢｒ２方向偏移；同时加入２．５％ＰｂＯ和２．５％ＰｂＦ２同样提高了玻璃转变温度，但却增大了玻璃形成区；继续提高ＰｂＯ和ＰｂＦ２的加入量，玻璃形成区显著减小．A series of new glasses in the PbBr2-PbCl2-PbF2-PbO-P2O5 systems were prepared and characterized. The glass_forming regions were studied and the stability of the glasses against crystallization was also studied. Results show that the PbBr2-PbCl2-P2O5 ternary system has a broad glass_forming region which extends down to 30% (in mol) P2O5. Most of the glasses in this system show strong stability against crystallization and have glass transition temperatures as low as 146 . When 5% PbO or 5% PbF2 is introduced into the PbBr2-PbCl2-P2O5 system, the glass_forming regions become smaller and the glass transition temperature is higher. The introduction of 2.5% PbF2 and 2.5% PbO into the ternary system glass increases the glass transition temperature and broadens the glass_forming region.

关 键 词：磷酸盐玻璃 玻璃形成区 低熔融温度 

分 类 号：TQ171.11[化学工程—玻璃工业] TQ171.717[化学工程—硅酸盐工业]