Inorganic composition article

Abstract

An inorganic composition article comprising reinforced crystallized glass, wherein the crystallized glass comprises one or more selected from α-cristobalite and α-cristobalite solid solution as a main crystal phase, and the crystallized glass has, by mass % in terms of oxide, a content of a SiO2 component being 50.0% to 75.0%, a content of a Li2O component being 3.0% to 10.0%, a content of an Al2O3 component being 5.0% or more and less than 15.0%, a content of a B2O3 component being more than 0% and 10.0% or less, a content of a P2O5 component being more than 0% and 10.0% or less, and a mass proportion of SiO2/(B2O3+Li2O) is 3.0 to 10.0, and wherein the inorganic composition article has a compressive stress layer on a surface, and the inorganic composition article has a four-point bending strength of 760 MPa or higher.

Dependencies are inferred from the claim text.