铒硼硅酸盐稀土玻璃的析晶行为  

Devitrification Abilities of Erbium Borosilicate Glasses

作　　者：张其土[1,2] 张静[1] 何伟[1] 王丽熙[1] 付振晓[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京工业大学江苏省无机及其复合新材料重点实验室,江苏南京210009

出　　处：《中国稀土学报》2009年第3期404-408,共5页Journal of the Chinese Society of Rare Earths

基　　金：国家部委配套项目资助(JPPT-342)

摘　　要：高含量稀土玻璃在激光防护材料方面具有重要的应用,通过对稀土玻璃析晶行为的研究,有助于制备出透明的高稀土含量稀土玻璃。分别制备了透明的铒硼硅酸盐稀土玻璃和富B2O3、富SiO2、富Al2O3的铒硼硅酸盐稀土玻璃,并在1100℃下对各种玻璃样品进行热处理。采用XRD,SEM等分析测试方法对Er2O3-B2O3-SiO2-Al2O3系玻璃的析晶行为进行研究,并探讨了玻璃组成对析晶产物的影响。结果表明,铒硼硅酸盐稀土玻璃的局部结构与ErBO3晶相的结构具有一定的相似性;富B2O3、富SiO2、富Al2O3的铒硼硅酸盐稀土玻璃会发生失透现象,稀土玻璃发生失透是由玻璃析晶引起的,其中铒硼硅酸盐稀土玻璃中最易析出的晶相是ErBO3。Glasses with high content of rare earths had important application in laser protective materials. The study on the crystallization of rare earth glasses was helpful to prepare transparent of rare earth. The transparent glasses with high content erbium borosilicate glasses which was boron rich, silicate rich, and aluminate rich, respectively, were prepared, and heat-treated at 1100℃ The crystallization of Er2O3-B2O3-SiO2- Al2O3 glasses was analyzed using XRD and SEM, and the effect of the glass composition on the devitrification products was also investigated. The results showed that the local structure of erbium borosilicate glasses was similar to the structure of ErBO3 crystal. The transmission loss happened on boron rich, silicate rich, and aluminate rich glasses. The transmission loss of rare-earth glasses was caused by the crystallization. ErBO3 had a tendency towards devitrification of erbium borosilicate glasses.

关 键 词：硼硅酸盐玻璃 氧化铒 析晶行为 稀土 

分 类 号：TQ174.758[化学工程—陶瓷工业]