Inorganic composition article

Patent metadata

Field	Value
Publication number	US-2025128979-A1
Application number	US-202318834606-A
Country	US
Kind code	A1
Filing date	Jan 31, 2023
Priority date	Jan 31, 2022
Publication date	Apr 24, 2025
Grant date	—

Abstract

This inorganic composition article is characterized by: being obtained by tempering a crystallized glass which contains, as the main crystal phase thereof, at least one selected from α-cristobalite and an α-cristobalite solid solution, and in which, when expressed as mass % of respective oxides, the contained amount of component SiO 2 is not less than 45.0% but less than 68.0%, the contained amount of component Al 2 O 3 is 3.0-15.0%, the contained amount of the component Li 2 O is 3.0-10.0%, the contained amount of component B 2 O 3 is more than 0% but not more than 10.0%, the contained amount of component P 2 O 5 is more than 0% but not more than 10.0%, the contained amount of the component ZrO 2 is more than 0% but not more than 10.0%; and the mass ratio of SiO 2 /(B 2 O 3 +Li 2 O) is 3.0-10.0; having a compressive stress layer on the surface thereof; and having a softening point (SP) of lower than 795° C.

First claim

1 . An inorganic composition article including at least one type selected from α-cristobalite and an α-cristobalite solid solution as a main crystalline phase,
wherein the inorganic composition article is obtained by reinforcing a crystallized glass where, by mass % in terms of oxide,
a content of a SiO 2 component is 45.0% to less than 68.0%,
a content of an Al 2 O 3 component is 3.0% to 15.0%,
a content of a Li 2 O component is 3.0% to 10.0%,
a content of a B 2 O 3 component is more than 0% to 10.0%,
a content of a P 2 O 5 component is more than 0% to 10.0%,
a content of a ZrO 2 component is more than 0% to 10.0%, and
a mass ratio represented by SiO 2 /(B 2 O 3 +Li 2 O) is 3.0 to 10.0, and

the inorganic composition article has a surface formed thereon with a compressive stress layer and a softening point (SP) of less than 795° C.

2 . The inorganic composition article according to claim 1 , wherein, in the crystallized glass, by mass % in terms of oxide,
a total content of the Al 2 O 3 component and the ZrO 2 component is 10.0% or more.

3 . The inorganic composition article according to claim 1 , wherein, in the crystallized glass, by mass % in terms of oxide,
a content of a K 2 O component is 0% to 5.0%, a content of a Na 2 O component is 0% to 4.0%, a content of a MgO component is 0% to 4.0%, a content of a CaO component is 0% to 4.0%, a content of a SrO component is 0% to 4.0%, a content of a BaO component is 0% to 5.0%, a content of a ZnO component is 0% to 10.0%, and a content of a Sb 2 O 3 component is 0% to 3.0%.

4 . The inorganic composition article according to claim 1 , wherein, in the crystallized glass, by mass % in terms of oxide,
a content of a Nb 2 O 5 component is 0% to 5.0%, a content of a Ta 2 O 5 component is 0% to 6.0%, and a content of a TiO 2 component is 0% or more and less than 1.0%.

5 . The inorganic composition article according to claim 1 , wherein a glass transition temperature (Tg) of the crystallized glass after crystallization is 610° C. or lower.

6 . The inorganic composition article according to claim 2 , wherein, in the crystallized glass, by mass % in terms of oxide,
a content of a K 2 O component is 0% to 5.0%, a content of a Na 2 O component is 0% to 4.0%, a content of a MgO component is 0% to 4.0%, a content of a CaO component is 0% to 4.0%, a content of a SrO component is 0% to 4.0%, a content of a BaO component is 0% to 5.0%, a content of a ZnO component is 0% to 10.0%, and a content of a Sb 2 O 3 component is 0% to 3.0%.

7 . The inorganic composition article according to claim 2 , wherein, in the crystallized glass, by mass % in terms of oxide,
a content of a Nb 2 O 5 component is 0% to 5.0%, a content of a Ta 2 O 5 component is 0% to 6.0%, and a content of a TiO 2 component is 0% or more and less than 1.0%.

8 . The inorganic composition article according to claim 3 , wherein, in the crystallized glass, by mass % in terms of oxide,
a content of a Nb 2 O 5 component is 0% to 5.0%, a content of a Ta 2 O 5 component is 0% to 6.0%, and a content of a TiO 2 component is 0% or more and less than 1.0%.

9 . The inorganic composition article according to claim 2 , wherein a glass transition temperature (Tg) of the crystallized glass after crystallization is 610° C. or lower.

10 . The inorganic composition article according to claim 3 , wherein a glass transition temperature (Tg) of the crystallized glass after crystallization is 610° C. or lower.

11 . The inorganic composition article according to claim 4 , wherein a glass transition temperature (Tg) of the crystallized glass after crystallization is 610° C. or lower.

Assignees

• Ohara Kk

Inventors

• Kikkawa Saya
• Yagi Toshitaka
• OGASAWARA Kohei

Classifications

• C03C21/002

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title

• C03C3/097 Primary

  containing phosphorus, niobium or tantalum · CPC title

• C03C10/0027 Primary

  containing SiO2, Al2O3, Li2O as main constituents · CPC title

• C03C3/091

  containing aluminium · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title