DE3201346C2 - Highly refractive optical glasses with refractive indices of 1.84 - 1.87 and Abbe numbers of 30 - 33 in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkalioxid / ZnO-PbO-La 2 O 3 ; -ZrO 2 -TiO 2 -Nb 2 O 5 - Google Patents

Highly refractive optical glasses with refractive indices of 1.84 - 1.87 and Abbe numbers of 30 - 33 in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkalioxid / ZnO-PbO-La 2 O 3 ; -ZrO 2 -TiO 2 -Nb 2 O 5

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Publication number
DE3201346C2
DE3201346C2 DE19823201346 DE3201346A DE3201346C2 DE 3201346 C2 DE3201346 C2 DE 3201346C2 DE 19823201346 DE19823201346 DE 19823201346 DE 3201346 A DE3201346 A DE 3201346A DE 3201346 C2 DE3201346 C2 DE 3201346C2
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Germany
Prior art keywords
glasses
sio
weight
until
zro
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Expired
Application number
DE19823201346
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German (de)
Other versions
DE3201346A1 (en
Inventor
Volkmar 6500 Mainz Geiler
Georg Dipl.-Ing. Dr. Gliemeroth
Karl Dr. 6204 Taunusstein Mennemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schott AG
Original Assignee
Schott Glaswerke 6500 Mainz
Schott Glaswerke AG
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Application filed by Schott Glaswerke 6500 Mainz, Schott Glaswerke AG filed Critical Schott Glaswerke 6500 Mainz
Priority to DE19823201346 priority Critical patent/DE3201346C2/en
Priority to JP539483A priority patent/JPS58125636A/en
Publication of DE3201346A1 publication Critical patent/DE3201346A1/en
Application granted granted Critical
Publication of DE3201346C2 publication Critical patent/DE3201346C2/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
    • C03C3/074—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

Ein neues optisches Glas mit Brechwerten von 1.84-1.87 und Abbezahlen von 30-33, das bevorzugt als Brillennahteilverschmelzglas verwendet werden kann, besteht aus (in Gew.%): SiO ↓2 7-11, B ↓2O ↓3 11-15, Al ↓2O ↓3 0-3; Alkalioxid 1,5-5, Erdalkali- und Zinkoxid 6-20; La ↓2O ↓3 20-34, Y ↓2O ↓3 0-7, Gd ↓2O ↓3 0-7, ZrO ↓2 4-8, TiO ↓2 4-12, PbO 0-20, Nb ↓2O ↓5 5-12, WO ↓3 0-4, Ta ↓2O ↓5 0-6.A new optical glass with refractive indices of 1.84-1.87 and Abbe numbers of 30-33, which can preferably be used as a close-up fusing glass for glasses, consists of (in% by weight): SiO ↓ 2 7-11, B ↓ 2O ↓ 3 11-15, Al ↓ 2O ↓ 3 0-3; Alkali oxide 1.5-5, alkaline earth and zinc oxide 6-20; La ↓ 2O ↓ 3 20-34, Y ↓ 2O ↓ 3 0-7, Gd ↓ 2O ↓ 3 0-7, ZrO ↓ 2 4-8, TiO ↓ 2 4-12, PbO 0-20, Nb ↓ 2O ↓ 5 5-12, WO ↓ 3 0-4, Ta ↓ 2O ↓ 5 0-6.

Description

32 Ol 34632 Ol 346

Nitrate, Carbonate) werden gemäß Rezept abgewogen; ein kleiner Anteil Läutermittel wird zugegeben, es wird gut gemischt und in einem Pt-Tiegel bis 1300° C eingeschmolzen. Nach dem Läutern und Homogenisieren wird bei ca. 980 bis 1000°C in eine Eisenform auslaufen gelassen bzw. sofort zu Glas verarbeitet.Nitrates, carbonates) are weighed according to the recipe; a small amount of refining agent is added, it becomes mixed well and melted in a Pt crucible up to 1300 ° C. After the lautering and homogenizing it is at approx. 980 to 1000 ° C in an iron mold or immediately processed into glass.

SiO2 B2O3 SiO 2 B 2 O 3

Li2O Na2O K2OLi 2 O Na 2 OK 2 O

CaO SrO BaO ZnOCaO SrO BaO ZnO

La2OjLa 2 Oj

Y2O3 Y 2 O 3

ZrO2 ZrO 2

TiO2 PbOTiO 2 PbO

Nb2O5 Nb 2 O 5

nd vdnd vd

*) nachgereichte Beispiele*) examples submitted later

9,459.45 9,50 *)9.50 *) 8,50 *)8.50 *) 9,0*)9.0 *) 13,6013.60 13,0013.00 13,6513.65 13,4013.40 0,850.85 0,850.85 1,051.05 0,700.70 0,750.75 0,700.70 0,850.85 0,300.30 0,800.80 0,600.60 1,001.00 1,501.50 4,204.20 5,405.40 -- 4,04.0 -- 4,154.15 -- 6,56.5 5,705.70 -- 11,1011.10 5,65.6 1,501.50 1,501.50 3,253.25 -- 26,3026.30 29,029.0 24,024.0 27,027.0 2,802.80 2,82.8 2,72.7 5,55.5 7,107.10 7,07.0 5,455.45 6,06.0 7,457.45 9,09.0 5,05.0 7,07.0 11,6011.60 9,09.0 15,9515.95 5,55.5 7,907.90 7,57.5 7,27.2 8,08.0 1,85801.8580 1,86401.8640 1,85201.8520 1,85001.8500 31,7531.75 31,931.9 31,131.1 32,732.7

1010

1515th

2020th

3030th

i'lji,i'lji,

35 40 45 5035 40 45 50

5555

6060

Claims (1)

Patentanspruch:Claim: Hochbrechende optische Gläser im System SiO2 - B2O3-Alkalioxid-Erdalkalioxid/ZnO - PbO - La2O3 ZrO2 - TiO2 - Nb2O5 mit Brechungsindizes von 1,84 bis 1,87 und Abbezahlen von 30 bis 33, die insbesondere als Nahteilbrillengläser für entsprechende hochbrechende Fernteilgläser zu verwenden sind, gekennzeichnet durch folgende Zusammensetzung (in Gew.-%):Highly refractive optical glasses in the system SiO 2 - B 2 O 3 - alkali oxide - alkaline earth oxide / ZnO - PbO - La 2 O 3 ZrO 2 - TiO 2 - Nb 2 O 5 with refractive indices from 1.84 to 1.87 and Abbe numbers from 30 to 33, which are to be used in particular as close-up glasses for corresponding high-refractive long-range glasses, characterized by the following composition (in% by weight): SiO2 SiO 2 8,58.5 bis 10,5up to 10.5 B2O3 B 2 O 3 12r512 r 5 bis 14,5to 14.5 SiO2 + B2O3 SiO 2 + B 2 O 3 2222nd bis 24until 24 Li2OLi 2 O 0,50.5 bis 2,0to 2.0 Na2ONa 2 O OO bis 1,5to 1.5 K2OK 2 O OO bis 1,5to 1.5 Li2O + Na2O + K2OLi 2 O + Na 2 O + K 2 O 1,51.5 bis 3,5up to 3.5 CaOCaO OO bis 7to 7 SrOSrO OO bis 7to 7 BaOBaO OO bis 13until 13 ZnOZnO OO bis 5until 5 CaO + SrO + BaO + ZnOCaO + SrO + BaO + ZnO 77th bis 16until 16 PbOPbO 55 bis 20until 20 La2C3 La 2 C 3 2424 bis 32to 32 Y2O3 Y 2 O 3 22 bis 6until 6 La2O3 + Y2O3 La 2 O 3 + Y 2 O 3 2727 bis 32to 32 ZrO2 ZrO 2 4,54.5 bis 7,5to 7.5 TiO2 TiO 2 55 bis 12until 12 Nb2O5 Nb 2 O 5 77th bis 11until 11 TiO2 + Nb2O5 TiO 2 + Nb 2 O 5 1313th bis 18until 18 B2O3 - SiO2-VerhältnisB 2 O 3 - SiO 2 ratio 1,31.3 bis 1,8to 1.8
Die Erfindung betrifft hochbrechende optische Gläser mit Brechungsindeces von 1,84 bis 1,87 und Abbezahlen > 30 mit hoher Entglasungsfestigkeit. Dank einer geeignet verlaufenden Viskositätskurve im Bereich von 106 bis 1015 poise und geeigneter Ausdehnungskoeffizienten <z2o-3oo von 80 bis 95 · 107 können sie bevorzugt als Brillennahteilverschmelzgläser für hochbrechende Fernteilgläser gemäß DE-OS 3026605 und DE-OS 31 21 824 Verwendung finden.The invention relates to high-index optical glasses with refractive indices of 1.84 to 1.87 and Abbe numbers> 30 with high devitrification resistance. Thanks to a suitable viscosity curve in the range from 10 6 to 10 15 poise and suitable expansion coefficients <z 2 o- 3 oo from 80 to 95 · 10 7 , they can preferably be used as close-up glasses for high-refractive binoculars according to DE-OS 3026605 and DE-OS 31 21 824 find use. Aus der DE-AS 2820940 sind hochbrechende optische Gläser des Systems B2O3 - La2O3 - ZrO2 Nb2O5 - PbO bekannt. Als Brillennahteilverschmelzglas können diese bekannten Gläser jedoch nicht verwendet werden, da sie aufgrund ihres zu hohen Ausdehnungskoeffizienten mit den entsprechenden hochbrechenden Fernteilgläsern nicht spannungsfrei verschmolzen werden können.
Dieser Nachteil wurde mit den erfindungsgemäßen Gläsern überwunden.From DE-AS 2820940 high refractive optical glasses of the system B 2 O 3 - La 2 O 3 - ZrO 2 Nb 2 O 5 - PbO are known. However, these known glasses cannot be used as close-up glasses because they cannot be fused stress-free with the corresponding high-refractive telescope glasses because of their excessive expansion coefficient.
This disadvantage has been overcome with the glasses according to the invention. Die Gläser gemäß dieser Erfindung gehören dem System B2O3 - SiO2-Alkalioxid-(ErdaIkali + ZnO) ZrO2 - TiO2 - Nb2O5 - PbO - La2O3 - Y2O3 an. Alkalio.xide in der Größenordnung von 1,5 bis 3,5 Gew.-% erniedrigen die notwendige Schmelztemperatur; des weiteren dienert sie zur Einstellung des gewünschten Ausdehnungskoeffizienten (wichtig für eine spannungsfreie Verschmelzung). Darüber hinaus ist insbesondere von Bedeutung, daß der B2O3-AnIeU den des SiO2 übersteigt; das B2O3 - SiO2-Verhältnis beträgt ca. 1,3 bis 1,8; nur innerhalb dieses Verhältnisses werden für Nahteilverschmelzungen genügend kristallisationsstabile Gläser erschmolzen. Die Summe an SiO2 und B2O3 beträgt 22 bis 24 Gew.-%; übersteigt der Anteil 24 Gew.-%^ werden die geforderten hohen Brechwerte nicht erreicht; unterhalb 22 Gew.-% wird der Anteil an Glasbildner zu gering, so daß keine genügend kristallisationsstabilen Gläser erhalten werden. Die Summe an Erdalkalioxiden (CaO + SrO + BaO) und ZnO beträgt erfindungsgemäß 7 bis 16 Gew.-%. Einerseits erhöhen die Erdalkalioxide den Brechwert, andererseits leisten sie gute Adaptionsdienste für die Verschmelzung, da die entsprechenden Fernteilgläser ebenfalls deutliche Anteile an diesen Komponenten aufweisen. ZrO2 erhöht den Brechwert beachtlich und sorgt für eine höhere Säureresistenz; bei mehr als 7,5 Gew.-% ZrO2 geht allerdings die hohe Entglasungsfestigkeit verloren. TiO2 (5 bis 12 Gew.-%) erhöht den Brechwert beachtlich, wobei allerdings auch der Abbewert erniedrigt wird; Nb2O5 erhöht ebenfalls sehr deutlich den Brechwert, übt aber auch Ersatzglasbildnerfunktion aus, was sich sehr günstig auf die Entglasungsstabilität auswirkt. Der SE-Oxid-Anteil (La2O3 + Y2O3) beträgt 27 bis 32 Gew.-%.The glasses according to this invention belong to the system B 2 O 3 - SiO 2 - alkali oxide - (alkaline earth + ZnO) ZrO 2 - TiO 2 - Nb 2 O 5 - PbO - La 2 O 3 - Y2O 3 . Alkaline oxides in the order of magnitude of 1.5 to 3.5% by weight lower the necessary melting temperature; it is also used to set the desired expansion coefficient (important for a stress-free fusion). In addition, it is particularly important that the B 2 O 3 -AnIeU exceeds that of SiO 2 ; the B 2 O 3 - SiO 2 ratio is approx. 1.3 to 1.8; Only within this ratio are enough crystallization-stable glasses melted for near-part fusions. The sum of SiO 2 and B 2 O 3 is 22 to 24% by weight; If the proportion exceeds 24% by weight, the required high refractive index is not achieved; below 22% by weight, the proportion of glass former is too low, so that glasses which are sufficiently stable to crystallization are not obtained. According to the invention, the sum of alkaline earth oxides (CaO + SrO + BaO) and ZnO is 7 to 16% by weight. On the one hand, the alkaline earth oxides increase the refractive index, on the other hand they provide good adaptation services for the fusion, since the corresponding binoculars also have significant proportions of these components. ZrO 2 increases the refractive index considerably and ensures a higher acid resistance; however, if ZrO 2 is more than 7.5% by weight, the high devitrification resistance is lost. TiO 2 (5 to 12% by weight) increases the refractive index considerably, although the depreciation is also reduced; Nb 2 O 5 also increases the refractive index very clearly, but also has a substitute glass-forming function, which has a very favorable effect on the devitrification stability. The rare earth oxide content (La 2 O 3 + Y 2 O 3 ) is 27 to 32% by weight. Einige beispielhafte Zusammensetzungen sind in der nachfolgenden Tabelle zusammengestellt.
Die Gläser gemäß dieser Erfindung werden folgendermaßen hergestellt: Die Komponenten (Oxide,Some exemplary compositions are compiled in the table below.
The glasses according to this invention are manufactured as follows: The components (oxides,
DE19823201346 1982-01-18 1982-01-18 Highly refractive optical glasses with refractive indices of 1.84 - 1.87 and Abbe numbers of 30 - 33 in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkalioxid / ZnO-PbO-La 2 O 3 ; -ZrO 2 -TiO 2 -Nb 2 O 5 Expired DE3201346C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19823201346 DE3201346C2 (en) 1982-01-18 1982-01-18 Highly refractive optical glasses with refractive indices of 1.84 - 1.87 and Abbe numbers of 30 - 33 in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkalioxid / ZnO-PbO-La 2 O 3 ; -ZrO 2 -TiO 2 -Nb 2 O 5
JP539483A JPS58125636A (en) 1982-01-18 1983-01-18 High-refractive index optical glass having refractive index of 1.84-1.87 and abbe number of 30-33

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823201346 DE3201346C2 (en) 1982-01-18 1982-01-18 Highly refractive optical glasses with refractive indices of 1.84 - 1.87 and Abbe numbers of 30 - 33 in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkalioxid / ZnO-PbO-La 2 O 3 ; -ZrO 2 -TiO 2 -Nb 2 O 5

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DE3201346A1 DE3201346A1 (en) 1983-07-28
DE3201346C2 true DE3201346C2 (en) 1986-03-13

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* Cited by examiner, † Cited by third party
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DE3201346A1 (en) 1983-07-28

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