	US 12,187,644 B2
	Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light
Paulo Jorge Gaspar Marques, Herblay sur Seine (FR); Antoine Marie Joseph Lepicard, Melun (FR); Jian Luo, Cupertino, CA (US); Lina Ma, Corning, NY (US); and Alexander I. Priven, Sejong-si (KR)
Assigned to Corning Incorporated, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Jan. 24, 2024, as Appl. No. 18/420,979.
Application 18/420,979 is a division of application No. 17/400,444, filed on Aug. 12, 2021, granted, now 11,976,004.
Claims priority of provisional application 63/076,551, filed on Sep. 10, 2020.
Prior Publication US 2024/0174547 A1, May 30, 2024
Int. Cl. C03C 3/068 (2006.01)

CPC C03C 3/068 (2013.01) [C03C 2201/3417 (2013.01); C03C 2201/42 (2013.01)]

16 Claims

1. A glass, comprising:

SiO₂from greater than or equal to 3.0 mol % and less than or equal to 25.0 mol %;

B₂O₃from 1.0 mol % or greater, wherein a sum of (SiO₂+B₂O₃) is 45.0 mol % or less;

a total content of divalent metal oxides (RO) of greater than or equal to 8.5 mol % and less than or equal to 15.0 mol %; and

at least one oxide selected from Nb₂O₅, TiO₂, ZrO₂, Li₂O, Ta₂O₅, Al₂O₃, BaO, Bi₂O₃, CaO, Er₂O₃, Gd₂O₃, K₂O, Na₂O, Nd₂O₃, P₂O₅, PbO, TeO₂, WO₃, Y₂O₃, Yb₂O₃, and ZnO, subject to the proviso that:

Gd₂O₃is from 0.0 mol % to 27.0 mol %;

CaO is from 0.0 mol % to 15.0 mol %;

Li₂O is from 0.0 mol % to 7.0 mol %;

MgO is from 0.0 mol % to 5.0 mol %;

Y₂O₃is from 0.0 mol % to 1.5 mol %;

Ta₂O₅is from 0.0 mol % to 0.5 mol %;

BaO is from 0.0 mol % to 14.0 mol %;

CdO is from 0.0 mol % to 10.0 mol %;

Bi₂O₃is from 0.0 mol % to 20.0 mol %;

PbO is from 0.0 mol % to 1.0 mol %;

HfO₂is from 0.0 mol % to 1.0 mol %;

TeO₂is from 0.0 mol % to 5.0 mol %;

Nb₂O₅is from 0.0 mol % to 25.0 mol %;

TiO₂is from 0.0 mol % to 18.0 mol %;

ZnO is from 0.0 mol % to 2.0 mol %;

fluorine is from 0.0 atomic % to 1.0 atomic %;

a sum of (SiO₂+B₂O₃+Alk₂O+MgO+CaO+SrO+BaO+ZnO) is 69.0 mol % or less, where Alk₂O is a total content of alkali metal oxides; and

a sum of (RE_mO_n+TiO₂+Nb₂O₅+ZrO₂+Bi₂O₃+WO₃) is 25.0 mol % or greater,

where RE_mO_nis a total content of rare earth metal oxides, and

wherein the glass has a refractive index parameter P_nand a transmittance index T_ithat satisfy formula (XI)(a):

P_n−(2.055−0.36*T_i)>0.000 (XI)(a)

where the refractive index parameter P_nis calculated according to formula (VI):

P_n=1.81706−0.0035654*Al₂O₃−0.0038101*B₂O₃+0.00081216*BaO+0.010373*Bi₂O₃+0.00013728*CaO+0.0073116*Er₂O₃+0.0055226*Gd₂O₃−0.003343*K₂O+0.0060806*La₂O₃−0.0009011*Li₂O−0.001967*Na₂O+0.0093799*Nb₂O₅+0.0060396*Nd₂O₃−0.0061024*P₂O₅+0.0040356*PbO−0.0032812*SiO₂+0.0030562*TeO₂+0.0034148*TiO₂+0.004267*WO₃+0.0034424*Y₂O₃+0.0071109*Yb₂O₃+0.00096907*ZnO+0.0026412*ZrO₂ (VI)

and

where the transmittance index T_iis calculated according to formula (III):

and each oxide listed in formula (VI) and formula (III) refers to the amount of the oxide, expressed in mol %, in the glass; and

wherein none of the ranges is modified by the term “about”.