Back to results
US 2025/0083991 A1Published application
Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light
AssigneeCorning Incorporated
InventorsPaulo Jorge Gaspar Marques, Antoine Marie Joseph Lepicard, Jian Luo, Lina Ma, Alexander I. Priven
Life of this patent
Estimating the term…
Abstract
Glasses containing silicon dioxide (SiO2) and/or boron oxide (B2O3) as glass formers and having a refractive index nd of greater than or equal to 1.80, as measured at 587.56 nm, a density of less than or equal to 5.5 g/cm3, as measured at 25° C., and a high transmittance to, particularly to blue light, are provided. Optionally, the glasses may be characterized by a high transmittance in the visible and near-ultraviolet (near-UV) range of the electromagnetic spectrum and/or good glass forming ability.
Claims16
A glass, comprising:
- TiO2 from 1.0 mol % to 40.0 mol %;
- B2O3 from 1.0 mol % to 29.0 mol %;
- SiO2 from 0.0 mol % to 32.0 mol %, wherein a sum of (SiO2+B2O3) is 45.0 mol % or less;
- and
- at least one oxide selected from Nb2O5, ZrO2, La2O3, Li2O, Al2O3, BaO, Bi2O3, CaO, Er2O3, Gd2O3, Na2O, Nd2O3, P2O5, PbO, WO3, Y2O3, Yb2O3, and ZnO, subject to the proviso that:
- La2O3 is from 15.0 mol % to 30.0 mol %;
- ZrO2 is from 0.0 mol % to 7.8 mol %;
- Nb2O5 is from 0.0 mol % to 7.0 mol %;
- CaO is from 0.0 mol % to 15.0 mol %;
- BaO is from 0.0 mol % to 15.0 mol %;
- Li2O is from 0.0 mol % to 3.5 mol %;
- GeO2 is from 0.0 mol % to 10.0 mol %;
- Al2O3 is from 0.0 mol % to 10.0 mol %;
- fluorine is from 0.0 atomic % to 1.0 atomic %;
- a sum of (Y2O3+ZnO) is from 0.0 mol % to 2.0 mol %;
- a total content of divalent metal oxides (RO) is from 0.0 mol % to 40.0 mol %;
- and
- a total content of monovalent metal oxides (R2O) is from 0.0 mol % to 15.0 mol %;
- wherein the glass has a transmittance index Ti of from 0.25 to 0.75 and wherein the glass has a refraction parameter Pref and a transmittance index Ti that satisfy formula (XII):
- P
- ref
- -
- (
- 0
- .
- 2
-
- 6
-
- 2
- -
- 0.115
- *
- T
- i
- )
- >
- 0.
- (
- XII
- )
- where the refraction parameter Pref is calculated according to formula (VIII):
- P
- ref
- =
- 0.2
- 1
-
- 6
-
- 5
-
- 6
- +
- 0
- .
- 0
-
- 0018225
- *
- B
- 2
-
- O
- 3
- -
- 0.0010873
- *
- BaO
- -
- 0.0024853
- *
- Bi
- 2
-
- O
- 3
- -
- 0
- .
- 0
-
- 030326
- *
- Er
- 2
-
- O
- 3
- -
- 0
- .
- 0
-
- 018856
- *
- Gd
- 2
-
- O
- 3
- -
- 0.0017563
- *
- La
- 2
-
- O
- 3
- -
- 0
- .
- 0
-
- 002505
- *
- Na
- 2
-
- O
- +
- 0.0017526
- *
- Nb
- 2
-
- O
- 5
- -
- 0.0025472
- *
- Nd
- 2
-
- O
- 3
- -
- 0.0016439
- *
- PbO
- +
- 0.000050096
- *
- SiO
- 2
- +
- 0.0011794
- *
- TiO
- 2
- -
- 0.00072112
- *
- WO
- 3
- -
- 0.00079167
- *
- Y
- 2
-
- O
- 3
- -
- 0.0031015
- *
- Yb
- 2
-
- O
- 3
- -
- 0.00034209
- *
- ZnO
- (
- VIII
- )
- and the transmittance index Ti is calculated according to formula (III):
- T
- i
- =
- (
- La
- 2
-
- O
- 3
- +
- Gd
- 2
-
- O
- 3
- +
- ZrO
- 2
- )
- (
- La
- 2
-
- O
- 3
- +
- Gd
- 2
-
- O
- 3
- +
- ZrO
- 2
- +
- TiO
- 2
- +
- Nb
- 2
-
- O
- 5
- )
- (
- III
- )
- and each oxide listed in formula (VIII) 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”.
226 more elements
Dependencies are inferred from the claim text.