US4200467A
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Zirconium-containing borosilicate glasses
Assignee: Corning SAS
•
Filing: 1978-06-28
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Granted: 1980-04-29
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Expires: 1998-06-28
Abstract
Abstract Disclosed are zirconium-containing borosilicate glass compositions having a refractive index n e between 1.55 and 1.72, and Abbe number ν e between 50 and 34 and a negative anomalous partial dispersion value Δν e between -3.0 and -7.7. Also disclosed is a process for the production of such glass compositions.
Inventors
- 👤 Heinz Broemer
- 👤 Werner Huber
- 👤 Norbert Meinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:17
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/066; C03C3/076; C03C3/089; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
394 words
A zirconium-containing borosilicate glass composition having a refractive index n e in the range of between about 1.55<n e <1.72, an Abbe number ν e in the range of between about 50>ν e >34 and negative anomalous partial dispersion value Δν e between about -3.0 and -7.7, consisting essentially of the following components: ______________________________________
(a) from about 8.4
to 45.5% by weight SiO.sub.2, and
from about 0.9
to 33.0% by weight B.sub.2 O.sub.3,
wherein the sum of (SiO.sub.2 + B.sub.2 O.sub.3)
amounts to between about 31.6 and
46.4% by weight
(b) from about 13.5
to 18.9% by weight ZrO.sub.2,
wherein the sum of (SiO.sub.2 + B.sub.2 O.sub.3 +
ZrO.sub.2) amounts to between about 46.1
and 64.4% by weight;
(c) 0 to about 5.0% by weight Li.sub.2 O,
0 to about 22.3% by weight Na.sub.2 O,
0 to about 10.0% by weight K.sub.2 O,
and
0 to about 24.0% by weight NaF,
wherein the sum of the alkali
metal oxides (Li.sub.2 O + Na.sub.2 O + K.sub.2 O)
amounts to between 0 and about
21.8% by weight and the sum of
(alkali metal oxides + NaF)
amounts to between about 8.0 and
24.0% by weight;
(d) 0 to about 2.0% by weight BaO,
0 to about 2.3% by weight ZnO,
0 to about 0.5% by weight CdO,
and
0 to about 5.0% by weight PbO,
wherein the sum of the bivalent
oxides (BaO + ZnO + CdO + PbO)
amounts to between 0 and about
5.5% by weight;
(e) 0 to about 9.9% by weight Al.sub.2 O.sub.3,
0 to about 24.8% by weight La.sub.2 O.sub.3,
0 to about 23.1% by weight Sb.sub.2 O.sub.3,
and
0 to about 4.0% by weight Y.sub.2 O.sub.3,
wherein the sum of the trivalent
oxides (Al.sub.2 O.sub.3 + La.sub.2 O.sub.3 + Sb.sub.2
O.sub.3 +
Y.sub.2 O.sub.3) amounts to between 0 and
about 26.9% by weight;
(f) 0 to about 5.0% by weight GeO.sub.2, and
0 to about 1.0% by weight TiO.sub.2,
wherein the sum of the tetravalent
oxides (ZrO.sub.2 + GeO.sub.2 + TiO.sub.2) amounts
to between about 13.5 and 20.6%
by weight;
(g) 0 to about 5.0% by weight Nb.sub.2 O.sub.5, and
0 to about 33.1% by weight Ta.sub.2 O.sub.5,
wherein the sum of the pentavalent
oxides (Nb.sub.2 O.sub.5 + Ta.sub.2 O.sub.5) amounts to
between 0 and about 36.1% by
weight; and
(h) 0 to about 2.1% by weight WO.sub.3.
______________________________________
Claim 2
Dependent Claim
394 words
A zirconium-containing borosilicate glass composition having a refractive index n e in the range of between about 1.55<n e <1.72, an Abbe number ν e in the range of between about 50>ν e >34 and negative anomalous partial dispersion value Δν e between about -3.0 and -7.7, consisting essentially of the following components: ______________________________________
(a) from about 8.4
to 45.5% by weight SiO.sub.2, and
from about 0.9
to 33.0% by weight B.sub.2 O.sub.3,
wherein the sum of (SiO.sub.2 + B.sub.2 O.sub.3)
amounts to between about 31.6 and
46.4% by weight
(b) from about 13.5
to 18.9% by weight ZrO.sub.2,
wherein the sum of (SiO.sub.2 + B.sub.2 O.sub.3 +
ZrO.sub.2) amounts to between about 46.1
and 64.4% by weight;
(c) 0 to about 5.0% by weight Li.sub.2 O,
0 to about 22.3% by weight Na.sub.2 O,
0 to about 10.0% by weight K.sub.2 O,
and
0 to about 24.0% by weight NaF,
wherein the sum of the alkali
metal oxides (Li.sub.2 O + Na.sub.2 O + K.sub.2 O)
amounts to between 0 and about
21.8% by weight and the sum of
(alkali metal oxides + NaF)
amounts to between about 8.0 and
24.0% by weight;
(d) 0 to about 2.0% by weight BaO,
0 to about 2.3% by weight ZnO,
0 to about 0.5% by weight CdO,
and
0 to about 5.0% by weight PbO,
wherein the sum of the bivalent
oxides (BaO + ZnO + CdO + PbO)
amounts to between 0 and about
5.5% by weight;
(e) 0 to about 9.9% by weight Al.sub.2 O.sub.3,
0 to about 24.8% by weight La.sub.2 O.sub.3,
0 to about 23.1% by weight Sb.sub.2 O.sub.3,
and
0 to about 4.0% by weight Y.sub.2 O.sub.3,
wherein the sum of the trivalent
oxides (Al.sub.2 O.sub.3 + La.sub.2 O.sub.3 + Sb.sub.2
O.sub.3 +
Y.sub.2 O.sub.3) amounts to between 0 and
about 26.9% by weight;
(f) 0 to about 5.0% by weight GeO.sub.2, and
0 to about 1.0% by weight TiO.sub.2,
wherein the sum of the tetravalent
oxides (ZrO.sub.2 + GeO.sub.2 + TiO.sub.2) amounts
to between about 13.5 and 20.6%
by weight;
(g) 0 to about 5.0% by weight Nb.sub.2 O.sub.5, and
0 to about 33.1% by weight Ta.sub.2 O.sub.5,
wherein the sum of the pentavalent
oxides (Nb.sub.2 O.sub.5 + Ta.sub.2 O.sub.5) amounts to
between 0 and about 36.1% by
weight; and
(h) 0 to about 2.1% by weight WO.sub.3.
______________________________________
Claim 3
Dependent Claim
31 words
A glass composition according to claim 1, further comprising up to about 3% by weight of a modifying additive selected from SnO 2 , P 2 O 5 and mixtures thereof.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
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