公开(公告)号：US20250100924A1

公开(公告)日：2025-03-27

申请号：US18713168

申请日：2022-10-05

Applicant: OHARA INC.

Inventor： TOSHITAKA YAGI ,  KOHEI OGASAWARA ,  SAYA KIKKAWA ,  AYANO MORI

IPC: C03C10/00 ,  C03C21/00

Abstract: Provided is an inorganic composition article obtained by reinforcing a crystallized glass and having a compressive stress layer on the surface, the compressive stress at a depth of 30 μm from an outermost surface being 120-320 MPa, and the crystallized glass comprising, as a main crystal phase, one or more types of crystal phases selected from α-cristobalite and an α-cristobalite solid solution, wherein in mass % calculated in terms of oxides, the content of an SiO2 component is 50.0-75.0%, the content of an Li2O component is 3.0-10.0%, the content of an Al2O3 component is from 5.0% to less than 15.0%, the content of a B2O3 component is from greater than 0% to 10.0% or less, the content of a P2O5 component is from greater than 0% to 10.0% or less, and a mass ratio of SiO2/(B2O3+Li2O) is 3.0-10.0.