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：US20200148581A1

公开(公告)日：2020-05-14

申请号：US16740529

申请日：2020-01-13

Applicant: AGC Inc.

Inventor： Madoka ONO

IPC: C03C3/091

Abstract: A strengthened glass has a mirror constant A of 1.97 MPa·m0.5 or less, a surface compressive stress (CS) of 10 MPa or more. A product (t×CS) of a sheet thickness t (unit: mm) and the CS (unit: MPa) is less than 230. The strengthened glass may have a fictive temperature at a central portion in a sheet thickness t direction of not lower than a glass transition temperature Tg and Tg+100° C. or lower.