WHITE, OPAQUE, ß-SPODUMENE GLASS-CERAMIC ARTICLES WITH TUNABLE COLOR AND METHODS FOR MAKING THE SAME

摘要

Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IΧ glass-ceramics are disclosed. The glass-ceramics exhibit β-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole%, include: 62-75 SiO₂; 10.5-18 A1₂O₃; 5-14 Li₂0; 2-12 B₂O₃; and 0.4-2 Fe₂0₃. Additionally, these glasses and glass-ceramics can exhibit the following criteria: a ratio: Li₂O+Na₂0+K₂0+M_gO+Zn0 [A1₂O₃] between 0.8 to 1.5. The glass-ceramics also exhibit colors at an observer angle of 10° and a CIE illuminant F02 determined with specular reflectance of a* between -0.5 and 0.5, b* between -2.5 and +2, and L* between 90 and 93.