US 12,240,779 B2
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
Qing Li, Tokyo (JP); Kenji Imakita, Tokyo (JP); Akio Koike, Tokyo (JP); and Eriko Maeda, Tokyo (JP)
Assigned to AGC Inc., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Nov. 12, 2021, as Appl. No. 17/525,554.
Application 17/525,554 is a continuation of application No. 16/936,533, filed on Jul. 23, 2020.
Application 16/936,533 is a continuation of application No. PCT/JP2019/006907, filed on Feb. 22, 2019.
Claims priority of application No. 2018-033693 (JP), filed on Feb. 27, 2018; and application No. 2019-021896 (JP), filed on Feb. 8, 2019.
Prior Publication US 2022/0064054 A1, Mar. 3, 2022
Int. Cl. C03C 10/00 (2006.01); C03B 23/025 (2006.01); C03B 32/02 (2006.01); C03C 4/00 (2006.01); C03C 21/00 (2006.01)
CPC C03C 10/0027 (2013.01) [C03B 23/0252 (2013.01); C03B 32/02 (2013.01); C03C 4/0028 (2013.01); C03C 10/0054 (2013.01); C03C 21/002 (2013.01); C03C 2204/00 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A three-dimensionally shaped crystallized glass, comprising:
a petalite crystal and a lithium disilicate crystal,
wherein the three-dimensionally shaped crystallized glass has an average transmittance of a light at a wavelength of 380 nm to 780 nm of 80% or more in terms of a thickness of 0.8 mm, the three-dimensionally shaped crystallized glass has a Young's modulus of 90 GPa or more, and the three-dimensionally shaped crystallized glass is formed by at least a bending-forming process at a bending temperature of from 700° C. to 900° C. so that a decrease of light transmittance by the bending-forming process is 3% or less.