Crystallized glass of three-dimensional shape, chemically strengthened glass of three-dimensional shape, and method for producing crystallized glass of three-dimensional shape and chemically strengthened glass of three-dimensional shape

A three-dimensionally shaped chemically strengthened glass having a compressive stress layer on a surface thereof, the glass being a crystallized glass comprising a crystal, having a light transmittance of 80% or more in terms of a thickness of 0.8 mm and comprising, in mass % on an oxide basis:

• from 45 to 74% of SiO2;
• from 1 to 30% of Al2O3;
• from 1 to 25% of Li2O;
• from 0 to 10% of Na2O;
• from 0 to 5% of K2O;
• from 0 to 15% in total of either one or more of SnO2 and ZrO2;
• and
• from 0 to 12% of P2O5.

A production method of a glass for chemical strengthening, the method comprising:

• heating and crystallizing a glass comprising, in mass % on an oxide basis:
• from 45 to 74% of SiO2;
• from 1 to 30% of Al2O3;
• from 1 to 25% of Li2O;
• from 0 to 10% of Na2O;
• from 0 to 5% of K2O;
• from 0 to 15% in total of either one or more of SnO2 and ZrO2;
• and
• from 0 to 12% of P2O5;
• and
• bend-forming a resulting crystallized glass under heating.