HENG Guo ¹, XIMH Zhong ¹, YANG Hui ¹, SOMG Fangfang ¹, CHEN Mingxin ²

(1.Center for Nano- Science and Nano- Technology of Zhejiang Univers ity, Hangzhou 310027; 2.Wenzhou Kanger Crys tallite Utens ils Co.Ltd., Wenzhou 325800)

Abstract: The nucleation behavior of Li₂O- Al₂O₃- SiO₂ (LAS) glas s containing P₂O₅ and/or F- was s tudied and the effect of F- and P⁵⁺ ions on the nucleation of LAS glas s was also discus sed. The results showed that F- and P⁵⁺ ions have different effect on the nucleation of LAS, the optimum nucleation sys tem of LAS glas s containing P₂O₅ and F- is 700 ℃/1 h, and 740℃/1.5 h for that containing only P₂O₅. F- ion decreases the crys tallization peak temperature and nucleation temperature and improves the nucleation and crys tallization, but P⁵⁺ ion increases the nucleation temperature and time.

Keywords: glass ceramic，lithium aluminos ilicate, fluorine, phosphorus，nucleation