Back to results
US 12,577,146 B2Granted
Borate and silicoborate optical glasses with high refractive index and low liquidus temperature
AssigneeCorning Incorporated
InventorsAntoine Marie Joseph Lepicard, Jian Luo, Alexander I Priven
Life of this patent
Estimating the term…
Abstract
Glass compositions include boron oxide (B2O3), lanthanum oxide (La2O3), tungsten oxide (WO3) and zirconia (ZrO2) as components and may optionally include niobia (Nb2O5), titania (TiO2), bismuth oxide (Bi2O3), yttria (Y2O3), tellurium oxide (TeO2), SiO2, PbO and other components. The glasses may be characterized by high refractive index at 587.56 nm and low density at room temperature relative to known glasses.
Claims20
A glass comprising a plurality of components, the glass having a composition of the components comprising:
- greater than or equal to 10.0 mol. % and less than or equal to 40.0 mol. % B2O3,
- greater than or equal to 0.0 mol. % and less than or equal to 40.0 mol. % WO3,
- greater than or equal to 0.0 mol. % and less than or equal to 30.0 mol. % Nb2O5,
- greater than or equal to 0.0 mol. % and less than or equal to 30.0 mol. % TiO2,
- greater than or equal to 0.0 mol. % and less than or equal to 25.0 mol. % La2O3,
- greater than or equal to 0.0 mol. % and less than or equal to 20.0 mol. % Bi2O3,
- greater than or equal to 0.0 mol. % and less than or equal to 15.0 mol. % TeO2,
- greater than or equal to 0.0 mol. % and less than or equal to 15.0 mol. % ZrO2,
- greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % SiO2,
- greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % PbO,
- greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % GeO2,
- greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % P2O5,
- greater than or equal to 0.0 mol. % and less than or equal to 6.0 mol. % Y2O3,
- greater than or equal to 0.0 mol. % and less than or equal to 5.0 mol. % V2O5,
- greater than or equal to 0.1 mol. % WO3+Bi2O3 and
- optionally comprising one or more components selected from rare earth metal oxides REmOn, Al2O3, BaO, CaO, K2O, Li2O, MgO, Na2O, SrO, Ta2O5 and ZnO,
- wherein none of the ranges of the components is modified by the term “about”;
- and
- wherein the composition of the components satisfies the condition:
- REmOn+ZrO2−Nb2O5 [mol. %]≥5.0, and
- wherein the glass satisfies the conditions:
- Pn>2.04,
- −5≤PGF≤15
- where
- Pn is a refractive index parameter, calculated from the glass composition in terms of mol. % of the components according to the Formula (IV):
- Pn=−0.0058979*Al2O3−0.006059*B2O3−0.00099077*BaO+0.008748*Bi2O3−0.0023394*CaO+0.0063304*Er2O3+0.0019089*Gd2O3−0.0043254*GeO2−0.0056788*K2O+0.0036519*La2O3−0.0033647*Li2O−0.0036379*MgO−0.0043599*Na2O+0.0027829*Nb2O5−0.0085247*P2O5+0.0016124*PbO−0.0054718*SiO2−0.0024916*SrO+0.0052979*Ta2O5−0.0030478*TeO2+0.0018048*TiO2+0.00087206*WO3+0.0026681*Y2O3+0.0052852*Yb2O3−0.0012391*ZnO+2.05, (IV)
- PGF is a glass formation parameter, calculated from the glass composition in terms of mol. % of the components according to the following formula:
- PGF=(B2O3/3)+max(0,WO3−TiO2−0.5*ZrO2)+Nb2O5+Ta2O5—(REmOn+Bi2O3), (III)
- where REmOn is a total sum of rare earth metal oxides, max(0, WO3−TiO2−0.5*ZrO2) refers to the greater of 0 and a difference WO3−TiO2−0.5*ZrO2, and an asterisk (*) means multiplication;
- and
- wherein neither the value of the refractive index parameter Pn nor the value of the glass formation parameter PGF is modified by the term “about”.
28 more elements
A glass comprising a plurality of components, the glass having a composition of the components comprising:
- greater than or equal to 10.0 mol. % and less than or equal to 40.0 mol. % B2O3,
- greater than or equal to 0.5 mol. % and less than or equal to 20.0 mol. % Bi2O3,
- greater than or equal to 0.0 mol. % and less than or equal to 3.0 mol. % P2O5,
- greater than or equal to 0.0 at. % and less than or equal to 1.0 at. % Cu,
- greater than or equal to 0.0 at. % and less than or equal to 1.0 at. % Fe,
- greater than or equal to 0.0 mol. % and less than or equal to 25.0 mol. % BaO+SrO+ZnO+CdO,
- greater than or equal to 0.0 mol. % and less than or equal to 5.0 mol. % MoO3+V2O5 and
- optionally comprising one or more components selected from TiO2, Nb2O5, SiO2, Al2O3, CaO, Er2O3, Gd2O3, GeO2, K2O, La2O3, Li2O, MgO, Na2O, PbO, Ta2O5, TeO2, WO3, Y2O3, Yb2O3 and ZrO2,
- wherein none of the ranges of the components is modified by the term “about”;
- and
- wherein the composition of the components satisfies the conditions:
- TiO2−Nb2O5 [mol. %]≤5.0 and
- SiO2−B2O3 [mol. %]≤5.0,
- and wherein the glass satisfies the conditions:
- Pn>1.9 and
- Pn−(1.483+0.104*Pd)>0.000,
- where
- Pn is a refractive index parameter, calculated from the glass composition in terms of mol. % of the components according to the Formula (IV):
- Pn=−0.0058979*Al2O3−0.006059*B2O3−0.00099077*BaO+0.008748*Bi2O3−0.0023394*CaO+0.0063304*Er2O3+0.0019089*Gd2O3−0.0043254*GeO2−0.0056788*K2O+0.0036519*La2O3−0.0033647*Li2O−0.0036379*MgO−0.0043599*Na2O+0.0027829*Nb2O5−0.0085247*P2O5+0.0016124*PbO−0.0054718*SiO2−0.0024916*SrO+0.0052979*Ta2O5−0.0030478*TeO2+0.0018048*TiO2+0.00087206*WO3+0.0026681*Y2O3+0.0052852*Yb2O3−0.0012391*ZnO+2.05, (IV)
- Pd is a density parameter, calculated from the glass composition in terms of mol. % of the components according to the Formula (V):
- Pd=4.488−0.030315*Al2O3−0.023886*B2O3+0.022641*BaO+0.075639*Bi2O3−0.0035072*CaO+0.072631*Er2O3+0.072133*Gd2O3−0.014396*GeO2−0.019374*K2O+0.051970*La2O3−0.011393*Li2O−0.0049704*MgO−0.010898*Na2O+0.0014888*Nb2O5−0.043265*P2O5+0.032783*PbO−0.021778*SiO2+0.0071976*SrO+0.056465*Ta2O5+0.0079679*TeO2−0.0080419*TiO2+0.023079*WO3+0.031205*Y2O3+0.080706*Yb2O3+0.010824*ZnO+0.0073434*ZrO2, (V)
- where an asterisk (*) means multiplication, and
- wherein neither the value of the refractive index parameter Pn nor the value of the density parameter Pd is modified by the term “about”.
20 more elements
A glass comprising a plurality of components, the glass having a composition of the components comprising:
- greater than or equal to 10.0 mol. % B2O3,
- greater than or equal to 3.0 mol. % and less than or equal to 30.0 mol. % Nb2O5,
- greater than or equal to 0.0 mol. % and less than or equal to 40.0 mol. % TiO2,
- greater than or equal to 0.0 mol. % and less than or equal to 25.0 mol. % La2O3,
- greater than or equal to 0.0 mol. % and less than or equal to 15.0 mol. % Bi2O3,
- greater than or equal to 0.0 mol. % and less than or equal to 14.0 mol. % TeO2,
- greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % P2O5,
- greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % GeO2,
- greater than or equal to 2.0 mol. % WO3+Bi2O3,
- greater than or equal to 2.0 mol. % TiO2+ZrO2,
- greater than or equal to 1.0 mol. % TiO2+Nb2O5,
- greater than or equal to 0.0 mol. % and less than or equal to 20.0 mol. % BaO+ZnO and
- optionally comprising one or more components selected from SiO2, Al2O3, CaO, Er2O3, Gd2O3, K2O, Li2O, MgO, Na2O, PbO, SrO, Ta2O5, Y2O3 and Yb2O3,
- wherein none of the ranges of the components is modified by the term “about”;
- and
- wherein the composition of the components satisfies the condition:
- Nb2O5−SiO2 [mol. %]≥3.0,
- and wherein the glass satisfies the conditions:
- 500≤PTg≤750 and
- Pn−(1.47+0.0009*PTg)>0.000,
- where
- Pn is a refractive index parameter, calculated from the glass composition in terms of mol. % of the components according to the Formula (IV):
- Pn=−0.0058979*Al2O3−0.006059*B2O3−0.00099077*BaO+0.008748*Bi2O3−0.0023394*CaO+0.0063304*Er2O3+0.0019089*Gd2O3−0.0043254*GeO2−0.0056788*K2O+0.0036519*La2O3−0.0033647*Li2O−0.0036379*MgO−0.0043599*Na2O+0.0027829*Nb2O5−0.0085247*P2O5+0.0016124*PbO−0.0054718*SiO2−0.0024916*SrO+0.0052979*Ta2O5−0.0030478*TeO2+0.0018048*TiO2+0.00087206*WO3+0.0026681*Y2O3+0.0052852*Yb2O3−0.0012391*ZnO+2.05, (IV)
- PTg is a Tg parameter, calculated from the glass composition in terms of mol. % of the components according to the Formula (VI):
- PTg=590+1.2049*Al2O3−0.73463*B2O3+0.48384*BaO−4.6279*Bi2O3+5.1528*Er2O3+4.7419*Gd2O3−0.46782*GeO2−5.4336*K2O+3.6709*La2O3−4.4120*Li2O−4.5127*Na2O+1.5185*Nb2O5−2.2882*PbO+0.18633*SiO2+0.59627*SrO+2.9784*Ta2O5−4.1591*TeO2+1.1157*TiO2−2.0154*WO3+4.7923*Y2O3+3.0372*Yb2O3−1.8077*ZnO+0.40110*ZrO2, (VI)
- where an asterisk (*) means multiplication, and
- wherein neither the value of the refractive index parameter Pn nor the value of the Tg parameter PTg is modified by the term “about”.
24 more elements
Dependencies are inferred from the claim text.