低熔点氧化物Li2O和ZnO使SiO2-Al2O3-MgO-K2O-B2O3-Li2O-ZnO-F系的熔化温度和析晶温度大大降低.ZnO还有扩大玻璃形成区的作用,使较高Li2O含量的玻璃可以获得透明.通过优选SiO2,Al2O3和MgO的成分,得到的玻璃陶瓷中除有足够数量的互相搭接良好的云母晶体外,还可以获得堇青石的晶体,它们分布在的云母晶体之间,使玻璃相减少.从而减小了晶体间的平均自由程,提高了可切削玻璃陶瓷的强度.
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