【摘要】 在以氟金云母KMg3Si3AlO10F2为主晶相的微晶玻璃中,以CaO替换部分K2O,同时再添加适量的ZrO2,可得到ZrO2-云母复相微晶玻璃,用XRD,SEM及EDXS研究了ZrO2的添加对可切削微晶玻璃中云母析晶性能及显微组织的影响.结果表明, ZrO2可以通过影响分相而促进玻璃的析晶;在CaO稳定的作用下,能够析出较多的t-ZrO2;ZrO2的加入能明显抑制云母晶体的长大,由于ZrO2的浓度起伏,析出了不同形态的组织结构更多还原

【Abstract】 For fabricating a ZrO2-mica diphase glass-ceramic, ZrO2 was added to the mica-based glass ceramic, in which a part of K2O is replaced by CaO. The effects of ZrO2 on the crystallinity of mica phase and the microstructure of the machinable glass-ceramics were studied by the methods of XRD, SEM, and EDXS. It is shown that ZrO2 makes mica phases crystallize easily by effecting phase separation of glass. And much t-ZrO2 is precipitated by the stability of CaO. The addition of ZrO2 makes the microstructure of the ZrO2-mica diphase glass ceramic fine. There exist different types of microstructures because of concentration fluctuation of ZrO2.更多还原