公开(公告)号：US20220274868A1

公开(公告)日：2022-09-01

申请号：US17652553

申请日：2022-02-25

Applicant: AGC INC.

Inventor： Kaname SEKIYA ,  Izuru KASHIMA ,  Hiroki TAKAHASHI

IPC: C03C21/00 ,  C03C3/083

Abstract: The present invention relates to a manufacturing method for a chemically strengthened glass, the method including: performing a first ion exchange by immersing a glass for chemical strengthening containing first alkali metal ions in a first molten salt composition containing second alkali metal ions; after the first ion exchange, performing a second ion exchange by immersing the chemically strengthened glass obtained after the first ion exchange in a second molten salt composition containing the first metal ions and third alkali metal ions; continuously using the first molten salt composition after being used for the first ion exchange; and continuously using a second molten salt composition after being used for the second ion exchange, in which: a concentration of the second molten salt composition is controlled by adding the first alkali metal ions to the second molten salt composition and a resulting second molten salt composition is used continuously.

公开(公告)号：US20240368023A1

公开(公告)日：2024-11-07

申请号：US18650183

申请日：2024-04-30

Applicant: AGC Inc.

Inventor： Hiroki TAKAHASHI ,  Atsuto HASHIMOTO ,  Kaname SEKIYA ,  Seiji INABA

IPC: C03C3/097 ,  C03C3/095

Abstract: The present invention relates to a glass for chemical strengthening, including: in terms of mole percentage based on oxides, 50% or more of SiO2; 0% to 10% of B2O3; 1% to 30% of Al2O3; 0% to 10% of P2O5; 0% to 10% of Y2O3; 0% to 25% of Li2O; 0% to 25% of Na2O; 0% to 25% of K2O; 0% to 10% of MgO; 0% to 10% of CaO; 0% to 10% of SrO; 0% to 10% of BaO; 0% to 10% of ZnO; 0% to 5% of ZrO2; 0% to 5% of TiO2; 0% to 5% of SnO2; and 0% to 0.5% of Fe2O3, in which a ratio (R2O/Al2O3) of a total content of Li2O, Na2O, and K2O to a content of Al2O3 satisfies the following Expression: 0.8≤(R2O/Al2O3)≤30.

公开(公告)号：US20190337844A1

公开(公告)日：2019-11-07

申请号：US16394040

申请日：2019-04-25

Applicant: AGC INC

Inventor： Yoshiteru IKEDA ,  lzuru KASHIMA ,  Hiroki TAKAHASHI ,  Kaname SEKIYA

IPC: C03C21/00

Abstract: The present invention relates to a method for producing a chemically strengthened glass, the method including the following steps (1) to (3) in this order: (1) a glass sheet preparation step of preparing a glass sheet having, in a surface layer thereof, a compressive stress layer; (2) a first ion exchange step of bringing the glass sheet into contact with an inorganic salt composition to perform ion exchange of at least one pair of ions so as to decrease a compressive stress value of the compressive stress layer; and (3) a second ion exchange step of bringing the glass sheet into contact with an inorganic salt composition to perform ion exchange of at least one pair of ions so as to increase the compressive stress value of the compressive stress layer in the surface layer.