Patent ID: 8431498

Claim:
A MgO—Al 2 O 3 —SiO 2 -based crystallized glass, comprising, by mass percent, 55.0-65.0% SiO 2 , 8.0-14.0% Al 2 O 3 , 10.0-20.0% MgO, 1.5-6.0% CaO, 1.0-2.2% Li 2 O, 0.7-3.0% Na 2 O, 2.5-4.0% K 2 O, and 1.5-3.0% F, wherein lepidolite or a lithium-containing waste is used as a raw material for the crystallized glass, an amount of the lepidolite or the lithium-containing waste is 25-50% by mass of all raw materials used for the crystallized glass, and the lepidolite or the lithium-containing waste comprises, by mass percent, 50.0-60.0% SiO 2 , 20.0-30.0% Al 2 O 3 0-0.5% MgO, 3.0-5.0% Li 2 O, 1.0-3.0% Na 2 O, 6.0-9.0% K 2 O, 4.0-6.0% F, 0-0.2% P 2 O 5 , 1.0-2.0% Rb 2 O, 0.1-0.5% Cs 2 O, 0.2-0.8% MnO 2 , and 0.1-0.4% Fe 2 O 3 .