CAJ | 학술논문

采用烧结法制备了CaO-SiO_2-R_2O-F(R=Na, K)系微晶玻璃,并结合XRD、DTA、SEM等测试方法,探讨了CaF_2含量对CaO-SiO_2-R_2O-F系微晶玻璃晶化行为的影响.结果表明:添加适量的CaF_2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CaF_2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.
채용소결법제비료CaO-SiO_2-R_2O-F(R=Na, K)계미정파리,병결합XRD、DTA、SEM등측시방법,탐토료CaF_2함량대CaO-SiO_2-R_2O-F계미정파리정화행위적영향.결과표명:첨가괄량적CaF_2능유효지촉진미정파리적석정.재일정열처리제도하,제비출적미정파리내함대량호쇄적판조상정체화침상정체,주정상위규감개석화Frankamenite(일충부함불적규감개석).수착CaF_2함량적증가,정체적함량축점제고,정체수량축점증대,척촌축점감소.
CaO-SiO_2-R_2O-F(R=Na,K) glass-ceramic were prepared by sintering method in this paper. Influence of nucleation agent CaF_2 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 CaF_2 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 acicular 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.