Patent ID: 8753991

Claim:
A glass-ceramic containing a β-quartz solid solution as a main crystalline phase, wherein its composition, expressed in percentages by weight of oxides, is free of CeO 2 , MnO 2 , F, Br, arsenic oxide and antimony oxide except for inevitable traces, and comprises, for at least 98% of its weight: SiO 2 66-70 Al 2 O 3 18-<20 Li 2 O 3-4 MgO 0.5-1.5 ZnO 1-2.2 TiO 2 2.5-3.2 ZrO 2 1.2-1.8 SnO 2 0.2-0.45 BaO 1-3 SrO 0-2 BaO + SrO 1-3 CaO 0-<0.3 Na 2 O 0-<0.3 K 2 O 0-<0.3 Na 2 O + K 2 O + CaO 0-<0.6 P 2 O 5 0-2 Fe 2 O 3 0-0.12 at least one dye 0-2.