Glass and crystallized glass
Glass and crystallized glass of the glass, the glass containing, by mass % in terms of an oxide, 40.0 to 55.0% of a SiO 2 component, 10.0 to 30.0% of an Al 2 O 3 component, 10.0 to 30.0% of an MgO component, 5.0 to 15.0% of a TiO 2 component, and more than 0 to 8.0% of an Na 2 O component.
1 . Crystallized glass, containing:
40.0 to 55.0% of a SiO 2 component;
10.0 to 30.0% of an Al 2 O 3 component;
16.52 to 30.0% of a MgO component;
5.0 to 15.0% of a TiO 2 component;
3.82 to 8.0% of a Na 2 O component; and
a content of a ZnO component is 2.01% or less,
by mass % in terms of an oxide,
wherein the crystallized glass contain, as a main crystal phase, MgSiO 3 or solid solutions thereof.
2 . The crystallized glass according to claim 1 , containing:
0 to 5.0% of a B 2 O 3 component;
0 to 5.0% of a P 2 O 5 component;
0 to 4.0% of an Li 2 O component;
0 to 5.0% of a K 2 O component;
0 to 5.0% of a CaO component;
0 to 5.0% of an SrO component;
0 to 5.0% of a BaO component;
0 to 2.01% of a ZnO component;
0 to 8.0% of a ZrO 2 component; and
0 to 1.0% of an Sb 2 O 3 component,
by mass % in terms of an oxide.
3 . The crystallized glass according to claim 1 , wherein the crystallized glass is strengthened glass having a compressive stress layer in a surface of the crystallized glass.
4 . The crystallized glass according to claim 2 , wherein the crystallized glass is strengthened glass having a compressive stress layer in a surface of the crystallized glass.