氟化物对氟闪石玻璃陶瓷反应析晶的影响

Effect of Fluoride on the Reactive Crystallization ofFluoramphibole Glass-Ceramics

摘要:

以废玻璃粉为主要原料,加入氟云母作为析晶促进剂,分别加入氟化锂、氟化钠、氟化镁、氟化钙、氟化钡作为添加剂,利用反应析晶烧结法制备氟闪石玻璃陶瓷。使用XRD、SEM和硬度测试等手段分析其物相组成、组织结构形貌和力学性能。结果表明,加入氟化钙可使析出的氟闪石晶体与玻璃基体结合致密,从而提高氟闪石玻璃陶瓷的硬度；添加单一氟化物的氟闪石玻璃陶瓷力学性能优于添加复合氟化物的样品。

Abstract:

Fluoramphibole glass-ceramics were fabricated by reactive crystallization sintering the powder mixtures of crystallization promoters (fluormica) and waste glass with added LiF, NaF, MgF₂, CaF₂, BaF₂, respectively. The phase composition, microstructure and mechanical properties were investigated by means of XRD, SEM, hardness test etc methods. The results show that the excellent bonding between the fluoramphibole crystal and the glass matrix was obtained when added CaF₂, it can improve the hardness of fluoramphibole glass-ceramics. The mechanical properties of fluoramphibole glass-ceramics with single addition of fluoride were better than combined addition.