摘要
采用烧结法制备了CaO-SiO2-R2O-F(R=Na,K)系微晶玻璃,并结合XRD、DTA、SEM等测试方法,探讨了CaF2含量对CaO-SiO2-R2O-F系微晶玻璃晶化行为的影响。结果表明:添加适量的CaF2能有效地促进微晶玻璃的析晶。在一定热处理制度下,制备出的微晶玻璃内含大量互锁的板条状晶体和针状晶体,主晶相为硅碱钙石和Frankamenite(一种富含氟的硅碱钙石)。随着CaF2含量的增加,晶体的含量逐渐提高,晶体数量逐渐增大,尺寸逐渐减小。
CaO-SiO2-R2O-F（ R = Na, K） glass-ceramic were prepared by sintering method in this paper. Influence of nucleation agent CaF2 on the crystallization behavior of canasite ceramic glasses had been investigated using differential thermal analysis （DTA）, X-ray diffraction （XRD）, and scanning electron microscopy （SEM）. The results indicate that CaF2 can effectively prompt full crystallization. By means of suitable heat treatment, canasite glass-ceramics can be obtained with a randomly-oriented interlocking blade-like crystals and aeicular crystals. The major crystalline phases of the glass-ceramics are canasite and Frankamenite （a fluorine-rich form of canasite）. With the increasing of the fluorine concentration, both the content and the number of crystalline phase increase, and the grain size decrease.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2009年第5期1024-1028,共5页
Bulletin of the Chinese Ceramic Society
关键词
微晶玻璃
硅碱钙石
晶化行为
显微结构
glass-ceramics
canasite
crystallization behavior
microstructure
