Disclosed herein are opaque glass-ceramics comprising at least one nepheline crystal phase and comprising from about 30 mol % to about 65 mol % SiO2, from about 15 mol % to about 40 mol % Al2O3, from about 10 mol % to about 20 mol % (Na2+K2O), and from about 1 mol % to about 10 mol % (ZnO+MgO). Also disclosed herein are opaque-glass ceramics comprising at least one nepheline crystal phase and at least one spinel-structure phase doped with at least one colorant chosen from transition metals and rare earth elements. Further disclosed herein are methods for making these opaque glass-ceramics.
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机译：本文公开了不透明的玻璃陶瓷，其包含至少一种霞石晶体相并且包含约30mol％至约65mol％的SiO 2 ＜Sub 2＞，约15mol％至约40mol％的Al ＜Sub>。 2 O 3 ，约10 mol％至约20 mol％（Na 2 + K 2 O），以及约1mol％至约10mol％（ZnO + MgO）。本文还公开了包含至少一种霞石晶体相和至少一种掺杂有至少一种选自过渡金属和稀土元素的着色剂的尖晶石结构相的不透明玻璃陶瓷。本文进一步公开了制备这些不透明玻璃陶瓷的方法。
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