	US 12,391,608 B2
	Glass strengthening molten salt and glass strengthening method using the same
Hyunji Lee, Gimhae-si (KR); Yongkyu Kang, Hwaseong-si (KR); and Hoikwan Lee, Suwon-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Feb. 7, 2022, as Appl. No. 17/650,199.
Claims priority of application No. 10-2021-0071557 (KR), filed on Jun. 2, 2021.
Prior Publication US 2022/0388902 A1, Dec. 8, 2022
Int. Cl. C03C 21/00 (2006.01)

CPC C03C 21/002 (2013.01)

12 Claims

1. A glass strengthening method comprising:

preparing a glass;

heating the glass to a first temperature of about 350° C. to about 400° C.; and

strengthening the glass by providing the glass with a molten salt,

wherein the molten salt has a freezing point equal to or higher than about 220° C. and less than about 320° C., and

wherein the molten salt comprises KNO₃and NaNO₃, and a mole fraction of NaNO₃with respect to KNO₃and NaNO₃is more than about 0.05 and about 0.5 or less.