Title:
INORGANIC COMPOSITION ARTICLE
Document Type and Number:
WIPO Patent Application WO/2024/014507
Kind Code:
A1
Abstract:
An inorganic composition article obtained by reinforcing a reinforced crystallized glass and having a compressive stress layer on the surface, wherein the ratio (CS30/CT) of the compressive stress (CS30) at a depth of 30 μm from the outermost surface to the central tensile stress (CT) is more than 1.64 and not more than 2.50. The reinforced crystallized glass comprises, 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 5.0% or more and less than 15.0%, the content of a B2O3 component is more than 0% and not more than 10.0%, the content of a P2O5 component is more than 0% and not more than 10.0%, and a mass ratio of SiO2/(B2O3 + Li2O) is 3.0-10.0.
Inventors:
OGASAWARA KOHEI (JP)
KIKKAWA SAYA (JP)
YAGI TOSHITAKA (JP)
KIKKAWA SAYA (JP)
YAGI TOSHITAKA (JP)
Application Number:
PCT/JP2023/025879
Publication Date:
January 18, 2024
Filing Date:
July 13, 2023
Export Citation:
Assignee:
OHARA KK (JP)
International Classes:
C03C10/14; C03C21/00
Domestic Patent References:
| WO2022050104A1 | 2022-03-10 |
Foreign References:
| JP2011084456A | 2011-04-28 | |||
| JP2008254984A | 2008-10-23 |
Attorney, Agent or Firm:
HEIWA INTERNATIONAL PATENT OFFICE (JP)
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