SiO_2-ZrO2_-B_2O_3系统凝胶玻璃的析晶研究  

Crystallization of Gels in the SiO_2-ZrO_2-B_2O_3 System

作　　者：刘峰[1] 郭学锋[1] 杨根仓[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《材料工程》2001年第8期7-10,共4页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目 (5 98710 41) ;航空基金资助项目 (98H5 3 0 93 )

摘　　要：利用溶胶 -凝胶原理 ,分别制备了 Si O2 - Zr O2 - B2 O3系统中六种不同成分的凝胶玻璃试样。通过分级热处理 ,系统地检验了其各自析晶性能以及高温结构稳定性。确定一最佳水解工艺参数以使 Si O2 - Zr O2 - B2 O3凝胶玻璃在 15 0 0℃保温 30 min后的析晶量 (vol% )仅为 1%～ 3%。同时 ,详细分析了 Zr O2 的引入对凝胶玻璃系统析晶的促进作用 ,以及少量 B2The preparation of glasses from gels in the ternary system of SiO 2 ZrO 2 B 2O 3 were investigated, by employing sol gel processing The crystallization character and high temperature structure stability of these gels were analyzed Meanwhile, the hydrolyzing engineering parameters were identified, which could make SiO 2 ZrO 2 B 2O 3 gel keep less crystalline (1%~3%, vol%) at a temperature of 1500℃for 30 min The effect of ZrO 2 and B 2O 3 on the crystallization was demonstrated and explained, respectively It was found that the crystallization trend of gels is descended with the addition of B 2O 3

关 键 词：溶胶-凝胶原理 SiO2-ZrO2-B2O3系统 析晶 凝胶玻璃 二氧化硅 二氧化锆 氧化硼 

分 类 号：TQ171.7[化学工程—玻璃工业] TQ171.1[化学工程—硅酸盐工业]