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

Abstract

The present invention provides crystallized glass of three-dimensional shape for easily producing chemically strengthened glass of three-dimensional shape that resists damage and has exceptional transparency. This crystallized glass of three-dimensional shape: contains crystals; has light transmittance in terms of a thickness of 0.8 mm of 80% or higher; and contains 45-74% SiO2, 1-30% Al2O3, 1-25% Li2O, 0-10% Na2O, 0-5% K2O, a total of 0-15% of SnO2 and/or ZrO2, and 0-12% P2O5, these amounts expressing the oxide-based mass percentage.

1 . A three-dimensionally shaped crystallized glass comprising a crystal, the glass 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 SiO 2 ;   from 1 to 30% of Al 2 O 3 ;   from 1 to 25% of Li 2 O;   from 0 to 10% of Na 2 O;   from 0 to 5% of K 2 O;   from 0 to 15% in total of either one or more of SnO 2  and ZrO 2 ; and   from 0 to 12% of P 2 O 5 .   
     
     
         2 . The three-dimensionally shaped crystallized glass according to  claim 1 , comprising, in mass % on an oxide basis:
 from 58 to 74% of SiO 2 ;   from 5 to 30% of Al 2 O 3 ;   from 1 to 14% of Li 2 O;   from 0 to 5% of Na 2 O;   from 0 to 2% of K 2 O;   from 0.5 to 12% in total of either one or more of SnO 2  and ZrO 2 ; and   from 0 to 6% of P 2 O 5 .   
     
     
         3 . The three-dimensionally shaped crystallized glass according to  claim 2 , comprising, in mass % on an oxide basis:
 from 58 to 70% of SiO 2 ;   from 15 to 30% of Al 2 O 3 ;   from 2 to 10% of Li 2 O;   from 0 to 5% of Na 2 O;   from 0 to 2% of K 2 O;   from 0.5 to 6% of SnO 2 ;   from 0.5 to 6% of ZrO 2 ; and   from 0 to 6% of P 2 O 5 ,   in which Na 2 O+K 2 O is from 1 to 5%.   
     
     
         4 . The three-dimensionally shaped crystallized glass according to  claim 1 , comprising, in mass % on an oxide basis:
 from 45 to 70% of SiO 2 ;   from 1 to 20% of Al 2 O 3 ;   from 10 to 25% of Li 2 O;   from 0 to 10% of Na 2 O;   from 0 to 5% of K 2 O;   from 0 to 15% of ZrO 2 ; and   from 0 to 12% of P 2 O 5 .   
     
     
         5 . The three-dimensionally shaped crystallized glass according to  claim 1 , comprising a β-spodumene crystal. 
     
     
         6 . The three-dimensionally shaped crystallized glass according to  claim 1 , comprising a petalite crystal. 
     
     
         7 . The three-dimensionally shaped crystallized glass according to  claim 1 , comprising a lithium metasilicate crystal. 
     
     
         8 . The three-dimensionally shaped crystallized glass according to  claim 1 , having a Vickers hardness of 780 or more. 
     
     
         9 . 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 SiO 2 ;   from 1 to 30% of Al 2 O 3 ;   from 1 to 25% of Li 2 O;   from 0 to 10% of Na 2 O;   from 0 to 5% of K 2 O;   from 0 to 15% in total of either one or more of SnO 2  and ZrO 2 ; and   from 0 to 12% of P 2 O 5 .   
     
     
         10 . The three-dimensionally shaped chemically strengthened glass according to  claim 9 , comprising, in mass % on an oxide basis:
 from 58 to 74% of SiO 2 ;   from 5 to 30% of Al 2 O 3 ;   from 1 to 14% of Li 2 O;   from 0 to 5% of Na 2 O;   from 0 to 2% of K 2 O;   from 0.5 to 12% in total of either one or more of SnO 2  and ZrO 2 ; and   from 0 to 6% of P 2 O 5 .   
     
     
         11 . The three-dimensionally shaped chemically strengthened glass according to  claim 9 , comprising, in mass % on an oxide basis:
 from 45 to 70% of SiO 2 ;   from 1 to 20% of Al 2 O 3 ;   from 10 to 25% of Li 2 O;   from 0 to 10% of Na 2 O;   from 0 to 5% of K 2 O;   from 0 to 15% of ZrO 2 ; and   from 0 to 12% of P 2 O 5 .   
     
     
         12 . The three-dimensionally shaped chemically strengthened glass according to  claim 9 , comprising a β-spodumene crystal. 
     
     
         13 . The three-dimensionally shaped chemically strengthened glass according to  claim 9 , comprising a lithium metasilicate crystal. 
     
     
         14 . The three-dimensionally shaped chemically strengthened glass according to  claim 9 , having a Vickers hardness of 800 or more. 
     
     
         15 . The three-dimensionally shaped chemically strengthened glass according to  claim 9 , having a surface compressive stress of 600 MPa or more and a depth of the compressive stress layer of 80 μm or more. 
     
     
         16 . 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 SiO 2 ;   from 1 to 30% of Al 2 O 3 ;   from 1 to 25% of Li 2 O;   from 0 to 10% of Na 2 O;   from 0 to 5% of K 2 O;   from 0 to 15% in total of either one or more of SnO 2  and ZrO 2 ; and   from 0 to 12% of P 2 O 5 ; and   bend-forming a resulting crystallized glass under heating.   
     
     
         17 . The production method of a glass for chemical strengthening according to  claim 16 , wherein the glass comprises, in mass % on an oxide basis:
 from 58 to 74% of SiO 2 ;   from 5 to 30% of Al 2 O 3 ;   from 1 to 14% of Li 2 O;   from 0 to 5% of Na 2 O;   from 0 to 2% of K 2 O;   from 0.5 to 12% in total of either one or more of SnO 2  and ZrO 2 ; and   from 0 to 6% of P 2 O 5 ,   in which Na 2 O+K 2 O is from 1 to 5%.   
     
     
         18 . The production method of a glass for chemical strengthening according to  claim 16 , wherein the glass comprises, in mass % on an oxide basis:
 from 45 to 70% of SiO 2 ;   from 1 to 20% of Al 2 O 3 ;   from 10 to 25% of Li 2 O;   from 0 to 10% of Na 2 O;   from 0 to 5% of K 2 O;   from 0 to 15% of ZrO 2 ; and   from 0 to 12% of P 2 O 5 .   
     
     
         19 . A production method of a chemically strengthened glass, the method comprising chemically strengthening a glass for chemical strengthening obtained by the method according to  claim 16 .