公开(公告)号：US20190263713A1

公开(公告)日：2019-08-29

申请号：US16386317

申请日：2019-04-17

Applicant: AGC INC.

Inventor： Suguru MURAYAMA ,  Satoshi KANASUGI ,  Madoka ONO

IPC: C03C3/083 ,  C03C3/087 ,  C03C3/097 ,  C03C3/085 ,  C03C3/091 ,  C03C3/093 ,  C03C21/00 ,  C03B23/03

Abstract: A glass for chemical strengthening has a Young's modulus E of 70 GPa or more. The glass satisfies X1+X2+X3 being 1760 or less. Here, X1 is a numerical value equivalent to a value [unit: kPa/° C.] obtained by multiplying the Young's modulus E by an average coefficient α of thermal expansion at 50° C. to 350° C., X2 is a numeral value equivalent to a value of a temperature Tf [unit: ° C.] at which a viscosity of the glass reaches 100 MPa·s, and X3 is a numerical value equivalent to a value of a difference [unit: 105 Pa·s] between the viscosity (100 MPa·s) at the Tf and a viscosity θ−10 at a temperature 10° C. higher than the Tf.

公开(公告)号：US20220274869A1

公开(公告)日：2022-09-01

申请号：US17747664

申请日：2022-05-18

Applicant: AGC Inc.

Inventor： Suguru MURAYAMA ,  Yuriko BANNO

IPC: C03C21/00 ,  C03C3/087 ,  C03C3/097 ,  C03C3/085 ,  C03C3/091 ,  C03C3/083 ,  C03C3/093

Abstract: A chemically strengthened glass having a thickness t of 2 mm or less, having a compressive stress value (CS90) at a portion of 90 μm deep from a glass surface being 25 MPa or more, and satisfying a number of fragments generated within a size of 25 mm×25 mm being 20 or less in a fracture test according to an indenter indentation test under a condition of holding a load ranging from 5 kgf to 10 kgf for 15 seconds with a pyramidal diamond indenter having an indenter angle of a facing angle of 60°.

公开(公告)号：US20200325066A1

公开(公告)日：2020-10-15

申请号：US16911878

申请日：2020-06-25

Applicant: AGC Inc.

Inventor： Suguru MURAYAMA ,  Kazuki KANEHARA ,  Eriko MAEDA

IPC: C03C21/00 ,  C03C3/087 ,  C03C3/078 ,  C03C3/095 ,  C03C3/097 ,  C03C3/093

Abstract: The present invention relates to a glass for chemical strengthening including, in mole percentage on an oxide basis: 45 to 75% of SiO2; 1 to 30% of Al2O3; 1 to 20% of Li2O; 0 to 5% of Y2O3; 0 to 5% of ZrO2; and 0 to 1% of TiO2, having a total content of one or more kinds of MgO, CaO, SrO, BaO and ZnO of 1 to 20%, having a total content of Na2O and K2O of 0 to 10%, having a total content of B2O3 and P2O5 of 0 to 10%, and having a value M expressed by the following expression of 1,000 or more: M=−5×[SiO2]+121×[Al2O3]+50×[Li2O]−35×[Na2O]+32×[K2O]+85×[MgO]+54×[CaO]−41×[Sr O]−4×[P2O5]+218×[Y2O3]+436×[ZrO2]−1180, in which each of [SiO2], [Al2O3], [Li2O], [Na2O], [K2O], [MgO], [CaO], [SrO], [P2O5], [Y2O3], and [ZrO2] designates a content of each component in mole percentage on an oxide basis.