	US 12,358,833 B2
	Bioactive glass compositions
Erin Coon, Lewisburg, PA (US); Qiang Fu, Painted Post, NY (US); and Alana Marie Whittier, Painted Post, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/610,175
Filed by Corning Incorporated, Corning, NY (US)
PCT Filed May 14, 2020, PCT No. PCT/US2020/032785 § 371(c)(1), (2) Date Nov. 10, 2021, PCT Pub. No. WO2020/236501, PCT Pub. Date Nov. 26, 2020.
Claims priority of provisional application 62/851,335, filed on May 22, 2019.
Prior Publication US 2022/0220022 A1, Jul. 14, 2022
Int. Cl. C03C 3/097 (2006.01); C03C 4/00 (2006.01); C03C 12/00 (2006.01); C03C 13/00 (2006.01)

CPC C03C 3/097 (2013.01) [C03C 4/0014 (2013.01); C03C 4/0021 (2013.01); C03C 12/00 (2013.01); C03C 13/00 (2013.01); C03C 2204/00 (2013.01); C03C 2213/02 (2013.01)]

16 Claims

1. A silicate-based glass composition, comprising:

47.7-50.3 wt. % SiO₂,

0-10 wt. % B₂O₃,

4.7-5.3 wt. % P₂O₅,

0-10 wt. % Al₂O₃,

0-5 wt. % Li₂O,

12.2-18.3 wt. % Na₂O,

4-8 wt. % K₂O,

1.7-3.3 wt. % MgO,

21.5-23 wt. % CaO,

15-35 wt. % MO, and

15-30 wt. % R₂O,

wherein MO is the sum of MgO, CaO, SrO, BeO, and BaO, and

wherein R₂O is the sum of Na₂O, K₂O, Li₂O, Rb₂O, and Cs₂O; and

wherein a difference between a glass transition temperature (T_g) of the glass composition and an onset of crystallization temperature (T_c,o) is at least 200° C.