DE3121824A1 - ACID RESISTANT, HYDROLYTICALLY RESISTANT OPTICAL AND OPHTHALMIC GLASS OF LOW DENSITY - Google Patents

ACID RESISTANT, HYDROLYTICALLY RESISTANT OPTICAL AND OPHTHALMIC GLASS OF LOW DENSITY

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Publication number
DE3121824A1
DE3121824A1 DE19813121824 DE3121824A DE3121824A1 DE 3121824 A1 DE3121824 A1 DE 3121824A1 DE 19813121824 DE19813121824 DE 19813121824 DE 3121824 A DE3121824 A DE 3121824A DE 3121824 A1 DE3121824 A1 DE 3121824A1
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deep
weight
cao
zro
tio
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DE19813121824
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German (de)
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DE3121824C2 (en
Inventor
Volkmar 6500 Mainz Geiler
Georg Dipl.-Ing. Dr. Gliemeroth
Karl Dr. 6204 Taunusstein Mennemann
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Schott AG
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Schott Glaswerke 6500 Mainz
Schott Glaswerke AG
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Priority to DE3121824A priority Critical patent/DE3121824C2/en
Priority to JP57077640A priority patent/JPS57200249A/en
Priority to BR8203146A priority patent/BR8203146A/en
Priority to ES512714A priority patent/ES512714A0/en
Priority to IT67695/82A priority patent/IT1157016B/en
Priority to FR8209484A priority patent/FR2510546B2/en
Priority to GB8215955A priority patent/GB2099417B/en
Priority to US06/384,462 priority patent/US4400473A/en
Publication of DE3121824A1 publication Critical patent/DE3121824A1/en
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Publication of DE3121824C2 publication Critical patent/DE3121824C2/en
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    • 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
    • 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
    • C03C3/074—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc

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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

Es wird ein optisches Glas mit einem Brechungsindex größer gleich 1,69, einer Abbezahl größer gleich 38 und einer Dichte kleiner gleich 3,25 g/cm[hoch]3 vorgeschlagen, das eine Weiterentwicklung des aus P 30 266 05.8-45 bekannten optischen Glases darstellt, und das sich von diesem bekannten Glas dadurch unterscheidet, dass es zur Verbesserung der Eignung für die kontinuierliche Wannenfertigung und zur Erhöhung der Säureresistenz 0,5 - 4,0 Gew.% P[tief]2O[tief]5 enthält, dass die Summe SiO[tief]2 + B[tief]2O[tief]3 + Al[tief]2O[tief]3 + P[tief]2O[tief]5 = 38,5 - 41,5 Gew.%, und dass die Summe MgO + CaO = 13 - 17,5 Gew.% beträgt.An optical glass with a refractive index greater than or equal to 1.69, an Abbe number greater than or equal to 38 and a density less than or equal to 3.25 g / cm [high] 3 is proposed, which is a further development of the optical glass known from P 30 266 05.8-45 represents, and differs from this known glass in that it contains 0.5-4.0 wt Sum SiO [deep] 2 + B [deep] 2O [deep] 3 + Al [deep] 2O [deep] 3 + P [deep] 2O [deep] 5 = 38.5 - 41.5% by weight, and that the sum of MgO + CaO = 13-17.5% by weight.

Description

Ziel der vorliegenden Erfindung sind optische und ophthalmische Gläser hoher Säureresistenz mit einem Brechwert von nd = 1,69 - 1,71 und einer Abbezahl größer als 38 sowie einer Dichte von 3,15 - 3,25 g/cm[hoch]3, die kontinuierlich in einer Schmelzwanne geschmolzen und anschließend automatisch verpresst werden können. Die Ausdehnungskoeffizienten dieser Gläser sollen kleines Alpha[tief]20-300°C ca. 80 - 97 mal 10[hoch]-7 betragen.The aim of the present invention are optical and ophthalmic glasses of high acid resistance with a refractive index of nd = 1.69-1.71 and an Abbe number greater than 38 and a density of 3.15-3.25 g / cm [high] 3, the continuously melted in a melting tank and then automatically compressed. The expansion coefficients of these glasses should be small alpha [low] 20-300 ° C approx. 80-97 times 10 [high] -7.

Die Patentanmeldung P 30 26 605.8 beschreibt ein säurefestes, hydrolytisch beständiges optisches und ophthalmisches Glas geringer Dichte, bei dem die Summe der GlasbildnerThe patent application P 30 26 605.8 describes an acid-resistant, hydrolytically stable optical and ophthalmic glass of low density, in which the sum of the glass formers

SiO[tief]2 + B[tief]2O[tief]3 + Al[tief]2O[tief]3 + GeO[tief]2 = 25 - 39 Gew.-% beträgt, und das statt GeO[tief]2 auch P[tief]2O[tief]5 aufweisen kann.SiO [deep] 2 + B [deep] 2O [deep] 3 + Al [deep] 2O [deep] 3 + GeO [deep] 2 = 25-39% by weight, and that instead of GeO [deep] 2 too P [deep] 2O [deep] 5 may have.

Es wurde nun gefunden, dass die Eignung des genannten Glases für die kontinuierliche Wannenfertigung noch dadurch verbessert werden kann, dass auf GeO[tief]2 ganz verzichtet, P[tief]2O[tief]5 als zwingender Bestandteil eingeführt und die Summe der Glasbildner SiO[tief]2 + B[tief]2O[tief]3 + Al[tief]2O[tief]3 + P[tief]2O[tief]5 auf 38,5 - 41,5 Gew.-% angehoben wird.It has now been found that the suitability of the said glass for continuous tub production can be further improved by completely dispensing with GeO [deep] 2, introducing P [deep] 2O [deep] 5 as a mandatory component and the sum of the glass formers SiO [deep] 2 + B [deep] 2O [deep] 3 + Al [deep] 2O [deep] 3 + P [deep] 2O [deep] 5 to 38.5 - 41.5% by weight.

Die Mengenbereiche der übrigen Glasbestandteile in diesem neuen Glas sind gegenüber den in dem Hauptpatent vorgeschlagenen Mengenbereichen teilweise erheblich eingeengt.The quantity ranges of the other glass components in this new glass are in some cases considerably narrowed compared to the quantity ranges proposed in the main patent.

Hier wie dort handelt es sich also um Borosilikatgläser mit 26 - 32,5 Gew.-% SiO[tief]2 und 6 - 12 Gew.-% B[tief]2O[tief]3. Diese sind bekanntlich gegen Hydrolyse und chemischen Angriff sehr resistent.Here, as there, we are dealing with borosilicate glasses with 26-32.5% by weight SiO [deep] 2 and 6-12% by weight B [deep] 2O [deep] 3. These are known to be very resistant to hydrolysis and chemical attack.

Eingeengte Bereiche für die Zusammensetzungen des neuen Glases sind in den Ansprüchen 2 und 3 wiedergegeben. Die Ansprüche 4 und 5 nennen die am meisten bevorzugten Zusammensetzungsbereiche im Rahmen der vorliegenden Erfindung.Restricted ranges for the compositions of the new glass are given in claims 2 and 3. Claims 4 and 5 name the most preferred composition ranges within the scope of the present invention.

In der Tabelle sind 4 Ausführungsbeispiele zusammengestellt.4 exemplary embodiments are compiled in the table.

TabelleTabel

(1) Bestimmung der Säureresistenz (SR) nach der Methode:(1) Determination of acid resistance (SR) according to the method:

Beschrieben im Schott-Katalog 311 d (1980) "Optisches Glas"Described in the Schott catalog 311 d (1980) "Optical Glass"

(2) Trägerblechtest beschrieben bei:(2) Carrier sheet test described for:

Grauer, O.H. & Hamilton, E.H.Grauer, O.H. & Hamilton, E.H.

J. Research NBS 44, 495 (1950).J. Research NBS 44, 495 (1950).

5 = 5 min Temperung5 = 5 min tempering

OEG = Obere EntglasungstemperaturUEL = upper devitrification temperature

Kg max/T = max. KristallwachstumsgeschwindigkeitKg max / T = max. Crystal growth rate

in µ/min / bei entsprechender Temperaturin µ / min / at the appropriate temperature

Claims (5)

1. Optisches und ophthalmisches Borosilikatglas mit einem Brechungsindex größer oder gleich 1,69 und v[tief]d größer oder gleich 38, einer Dichte kleiner oder gleich 3,25 g/cm[hoch]3, einem Ausdehnungskoeffizienten kleines Alpha[tief]20 - 300°C von 80 bis 97 x 10[hoch]-7/Grad und einer hohen Säurefestigkeit, nach Patentanmeldung P 30 26 605.8-45, dadurch gekennzeichnet, dass es zur Verbesserung der Eignung für die kontinuierliche Wannenfertigung und zur weiteren Erhöhung der Säureresistenz1. Optical and ophthalmic borosilicate glass with a refractive index greater than or equal to 1.69 and v [deep] d greater than or equal to 38, a density less than or equal to 3.25 g / cm [high] 3, a coefficient of expansion small alpha [deep] 20 - 300 ° C from 80 to 97 x 10 [high] -7 / degree and a high acid resistance, according to patent application P 30 26 605.8-45, characterized in that it is used to improve the suitability for continuous tub production and to further increase the acid resistance 0,5 - 4,0 Gew.-% P[tief]2O[tief]50.5-4.0% by weight P [deep] 2O [deep] 5 enthält, dass die Summethat includes the sum SiO[tief]2 + B[tief]2O[tief]3 + Al[tief]2O[tief]3 + P[tief]2O[tief]5 = 38,5 - 41,5 Gew.-%,SiO [deep] 2 + B [deep] 2O [deep] 3 + Al [deep] 2O [deep] 3 + P [deep] 2O [deep] 5 = 38.5 - 41.5% by weight, und dass die Summe MgO + CaO = 13 - 17,5 Gew.-%and that the sum of MgO + CaO = 13 - 17.5% by weight (Zusatz zu P 30 26 605.8-45)(Addition to P 30 26 605.8-45) 1. Optisches und ophthalmisches Glas mit nd größer 1,69 und vd größer gleich 038, einer Dichte kleiner gleich 3,25 g/cm[hoch]3, einem Ausdehnungskoeffizienten kleines Alpha[tief]20-300°C von 80 - 97 mal 10[hoch]-7 und einer hohen Säureresistenz, nach Patentanmeldung P 30 26 605.8-45, dadurch gekennzeichnet, dass es zur Verbesserung der Eignung für die kontinuierliche Wannenfertigung und zur weiteren Erhöhung der Säureresistenz1. Optical and ophthalmic glass with nd greater than 1.69 and vd greater than or equal to 038, a density less than or equal to 3.25 g / cm [high] 3, a coefficient of expansion small alpha [deep] 20-300 ° C of 80-97 times 10 [high] -7 and a high acid resistance, according to patent application P 30 26 605.8-45, characterized in that it is used to improve the suitability for continuous tub production and to further increase the acid resistance 0,5 - 4,0 Gew.-% P[tief]2O[tief]50.5-4.0% by weight P [deep] 2O [deep] 5 enthält, dass die Summethat includes the sum SiO[tief]2 + B[tief]2O[tief]3 + Al[tief]2O[tief]3 + P[tief]2O[tief]5 = 38,5 - 41,5 Gew.-%,SiO [deep] 2 + B [deep] 2O [deep] 3 + Al [deep] 2O [deep] 3 + P [deep] 2O [deep] 5 = 38.5 - 41.5% by weight, und dass die Summe MgO + CaO = 13 - 17,5 Gew.-%and that the sum of MgO + CaO = 13 - 17.5% by weight 2. Glas nach Anspruch 1, gekennzeichnet durch folgende Zusammensetzung:2. Glass according to claim 1, characterized by the following composition: SiO[tief]2 26,0 - 32,5 Gew.-%SiO [deep] 2 26.0 - 32.5% by weight B[tief]2O[tief]3 6,0 - 12,0 Gew.-%B [deep] 2O [deep] 3 6.0 - 12.0% by weight Al[tief]2O[tief]3 0 - 3,0 Gew.-%Al [deep] 2O [deep] 3 0 - 3.0% by weight P[tief]2O[tief]5 0,5 - 4,0 Gew.-%P [deep] 2O [deep] 5 0.5 - 4.0% by weight Li[tief]2O 0 - 5 Gew.-%Li [deep] 2O 0 - 5% by weight Na[tief]2O 0 - 6 Gew.-%Na [deep] 2O 0 - 6% by weight K[tief]2O 0 - 8 Gew.-%K [deep] 2O 0 - 8% by weight La[tief]2O + Na[tief]2O + K[tief]2O = 4,5 - 12,0 Gew.-%La [deep] 2O + Na [deep] 2O + K [deep] 2O = 4.5 - 12.0% by weight MgO 0 - 8 Gew.-%MgO 0 - 8% by weight CaO 9 - 16 Gew.-%CaO 9-16% by weight MagO + CaO = 13 - 17,5 Gew.-%MagO + CaO = 13 - 17.5% by weight SrO 0 - 6 Gew.-%SrO 0 - 6% by weight BaO 0 - 5 Gew.-%BaO 0 - 5% by weight ZnO 0 - 7 Gew.-%ZnO 0 - 7% by weight PbO 0 - 4 Gew.-%PbO 0-4% by weight SrO + BaO + ZnO + PbO = 0 - 7 Gew.-%SrO + BaO + ZnO + PbO = 0 - 7% by weight MgO + CaO + SrO + BaO + ZnO + PbO = 17 - 24 Gew.-%MgO + CaO + SrO + BaO + ZnO + PbO = 17 - 24% by weight La[tief]2O[tief]3 6 - 11 Gew.-%La [deep] 2O [deep] 3 6 - 11% by weight ZrO[tief]2 5 - 8 Gew.-%ZrO [deep] 2 5 - 8% by weight La[tief]2O[tief]3 + ZrO[tief]2 = 13,5 - 17,5 Gew.-%La [deep] 2O [deep] 3 + ZrO [deep] 2 = 13.5 - 17.5% by weight TiO[tief]2 5 - 9 Gew.-%TiO [deep] 2 5 - 9% by weight Nb[tief]2O[tief]5 6 - 11 Gew.-%Nb [deep] 2O [deep] 5 6 - 11% by weight WO[tief]3 0 - 4 Gew.-%WO [deep] 3 0 - 4% by weight TiO[tief]2 + Nb[tief]2O[tief]5 + WO[tief]3 = 14 - 18 Gew.-%TiO [deep] 2 + Nb [deep] 2O [deep] 5 + WO [deep] 3 = 14 - 18% by weight La[tief]2O[tief]3 + ZrO[tief]2 + TiO[tief]2 + Nb[tief]2O[tief]5 + WO[tief]3 = 28 - 33 Gew.-%La [deep] 2O [deep] 3 + ZrO [deep] 2 + TiO [deep] 2 + Nb [deep] 2O [deep] 5 + WO [deep] 3 = 28 - 33% by weight ZrO[tief]2 + TiO[tief]2 + Nb[tief]2O[tief]5 = 20 - 26 Gew.-%.ZrO [deep] 2 + TiO [deep] 2 + Nb [deep] 2O [deep] 5 = 20-26% by weight. 3. Glas nach Anspruch 1, gekennzeichnet durch folgende Zusammensetzung:3. Glass according to claim 1, characterized by the following composition: SiO[tief]2 29 - 32 Gew.-%SiO [deep] 2 29 - 32% by weight B[tief]2O[tief]3 7,5 - 10 Gew.-%B [deep] 2O [deep] 3 7.5 - 10% by weight P[tief]2O[tief]5 0,5 - 2,5 Gew.-%P [deep] 2O [deep] 5 0.5 - 2.5% by weight Al[tief]2O[tief]3 0 - 3 Gew.-%Al [deep] 2O [deep] 3 0 - 3 wt .-% Li[tief]2O 0,5 - 4 Gew.-%Li [deep] 2O 0.5 - 4% by weight Na[tief]2O 1,5 - 3,5 Gew.-%Na [deep] 2O 1.5 - 3.5% by weight K[tief]2O 2,5 - 7 Gew.-%K [deep] 2O 2.5 - 7% by weight Li[tief]2O + Na[tief]2O + K[tief]2O = 6 - 10 Gew.-%Li [deep] 2O + Na [deep] 2O + K [deep] 2O = 6 - 10% by weight MgO 1,0 - 5,0 Gew.-%MgO 1.0-5.0% by weight CaO 10,0 - 13,5 Gew.-%CaO 10.0 - 13.5% by weight MgO + CaO = 13 - 17 Gew.-%MgO + CaO = 13-17% by weight SrO 0 - 5 Gew.-%SrO 0 - 5% by weight ZnO 0 - 7 Gew.-%ZnO 0 - 7% by weight BaO 0 - 5 Gew.-%BaO 0 - 5% by weight PbO 0 - 4 Gew.-%PbO 0-4% by weight SrO + ZnO + BaO + PbO = 0 - 7 Gew.-%SrO + ZnO + BaO + PbO = 0 - 7% by weight MgO + CaO + SrO + ZnO + BaO + PbO = 16 - 22 Gew.-%,MgO + CaO + SrO + ZnO + BaO + PbO = 16 - 22% by weight, La[tief]2O[tief]3 6 - 11 Gew.-%La [deep] 2O [deep] 3 6 - 11% by weight ZrO[tief]2 5 - 8 Gew.-%ZrO [deep] 2 5 - 8% by weight La[tief]2O[tief]3 + ZrO[tief]2 13,5 - 17,5 Gew.-%La [deep] 2O [deep] 3 + ZrO [deep] 2 13.5 - 17.5% by weight TiO[tief]2 5 - 9 Gew.-%TiO [deep] 2 5 - 9% by weight Nb[tief]2O[tief]5 6 - 11 Gew.-%Nb [deep] 2O [deep] 5 6 - 11% by weight TiO[tief]2 + Nb[tief]2O[tief]5 = 15 - 17 Gew.-%TiO [deep] 2 + Nb [deep] 2O [deep] 5 = 15 - 17% by weight La[tief]2O[tief]3 + ZrO[tief]2 + TiO[tief]2 + Nb[tief]2O[tief]5 = 28 - 33 Gew.-%La [deep] 2O [deep] 3 + ZrO [deep] 2 + TiO [deep] 2 + Nb [deep] 2O [deep] 5 = 28 - 33% by weight ZrO[tief]2 + TiO[tief]2 + Nb[tief]2O[tief]5 = 21 - 25 Gew.-%ZrO [deep] 2 + TiO [deep] 2 + Nb [deep] 2O [deep] 5 = 21 - 25% by weight 4. Glas nach Anspruch 1, gekennzeichnet durch folgende Zusammensetzung:4. Glass according to claim 1, characterized by the following composition: SiO[tief]2 30,5 - 31,5 Gew.-%SiO [deep] 2 30.5 - 31.5% by weight B[tief]2O[tief]3 8,0 - 9,0 Gew.-%B [deep] 2O [deep] 3 8.0 - 9.0% by weight Li[tief]2O 1,0 - 2,0 Gew.-%Li [deep] 2O 1.0 - 2.0% by weight Na[tief]2O 2,0 - 4,0 Gew.-%Na [deep] 2O 2.0 - 4.0% by weight K[tief]2O 3,0 - 5,0 Gew.-%K [deep] 2O 3.0 - 5.0% by weight MgO 2,0 - 4,0 Gew.-%MgO 2.0-4.0% by weight CaO 11,0 - 13,0 Gew.-%CaO 11.0 - 13.0% by weight La[tief]2O[tief]3 8,5 - 9,5 Gew.-%La [deep] 2O [deep] 3 8.5 - 9.5% by weight ZrO[tief]2 6,5 - 8,0 Gew.-%ZrO [deep] 2 6.5 - 8.0% by weight TiO[tief]2 7,0 - 9,0 Gew.-%TiO [deep] 2 7.0 - 9.0% by weight Nb[tief]2O[tief]5 7,0 - 9,0 Gew.-%Nb [deep] 2O [deep] 5 7.0 - 9.0% by weight SrO 2,0 - 4,0 Gew.-%SrO 2.0-4.0% by weight P[tief]2O[tief]5 1,0 - 2,0 Gew.-%.P [deep] 2O [deep] 5 1.0-2.0 wt%. 5. Glas nach Anspruch 1, gekennzeichnet durch folgende Zusammensetzung:5. Glass according to claim 1, characterized by the following composition: SiO[tief]2 29,0 - 30,5 Gew.-%SiO [deep] 2 29.0 - 30.5% by weight B[tief]2O[tief]3 8,0 - 10,0 Gew.-%B [deep] 2O [deep] 3 8.0 - 10.0% by weight Li[tief]2O 2,0 - 4,0 Gew.-%Li [deep] 2O 2.0 - 4.0% by weight Na[tief]2O 2,0 - 4,0 Gew.-%Na [deep] 2O 2.0 - 4.0% by weight K[tief]2O 3,0 - 5,0 Gew.-%K [deep] 2O 3.0 - 5.0% by weight MgO 3,0 - 5,0 Gew.-%MgO 3.0-5.0% by weight CaO 10,0 - 12,0 Gew.-%CaO 10.0 - 12.0% by weight La[tief]2O[tief]3 7,0 - 8,5 Gew.-%La [deep] 2O [deep] 3 7.0 - 8.5% by weight ZrO[tief]2 7,0 - 8,0 Gew.-%ZrO [deep] 2 7.0 - 8.0% by weight TiO[tief]2 6,0 - 8,0 Gew.-%TiO [deep] 2 6.0 - 8.0% by weight Nb[tief]2O[tief]5 9,0 - 11,0 Gew.-%Nb [deep] 2O [deep] 5 9.0 - 11.0% by weight P[tief]2O[tief]5 1,0 - 2,0 Gew.-%P [deep] 2O [deep] 5 1.0 - 2.0% by weight ZnO 3,0 - 5,0 Gew.-%ZnO 3.0 - 5.0% by weight
DE3121824A 1980-07-14 1981-06-02 Acid-resistant, hydrolytically stable optical and ophthalmic glass of low density Expired DE3121824C2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE3121824A DE3121824C2 (en) 1981-06-02 1981-06-02 Acid-resistant, hydrolytically stable optical and ophthalmic glass of low density
JP57077640A JPS57200249A (en) 1981-06-02 1982-05-11 Acid-resistant hydrolysis-resistant low density optical and ophthalmic glass
BR8203146A BR8203146A (en) 1981-06-02 1982-05-28 HYDROLYTIC STABLE HYDROLYTIC AND OPTICAL GLASS AND LOW DENSITY ACID PROOF
IT67695/82A IT1157016B (en) 1981-06-02 1982-05-31 OPTICAL AND OPHTHALMIC GLASS
ES512714A ES512714A0 (en) 1981-06-02 1982-05-31 PROCEDURE FOR OBTAINING OPTICAL AND OPHTHALMIC GLASS.
FR8209484A FR2510546B2 (en) 1981-06-02 1982-06-01 LIGHT GLASS, FOR OPTICAL AND OPHTHALMIC USE, HAVING GOOD RESISTANCE TO ACIDS AND HYDROLYSIS
GB8215955A GB2099417B (en) 1981-06-02 1982-06-01 Acid-proof hydrolytically stable low density optical or ophthalmic glass
US06/384,462 US4400473A (en) 1980-07-14 1982-06-02 Acidproof, hydrolysis-resistant optical and ophathalmic glass of low density

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DE3121824A DE3121824C2 (en) 1981-06-02 1981-06-02 Acid-resistant, hydrolytically stable optical and ophthalmic glass of low density

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DE3121824A1 true DE3121824A1 (en) 1983-02-03
DE3121824C2 DE3121824C2 (en) 1984-06-14

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JP (1) JPS57200249A (en)
BR (1) BR8203146A (en)
DE (1) DE3121824C2 (en)
ES (1) ES512714A0 (en)
FR (1) FR2510546B2 (en)
GB (1) GB2099417B (en)
IT (1) IT1157016B (en)

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JPS6021828A (en) * 1983-07-14 1985-02-04 Hoya Corp Glass for spectacle lens
DE4101365C1 (en) * 1991-01-18 1992-04-16 Schott Glaswerke, 6500 Mainz, De
JP3302892B2 (en) * 1996-10-23 2002-07-15 株式会社オハラ Optical glass
BR9809585A (en) * 1997-04-30 2000-10-17 Corning Inc "glasses with high refractive index, multifocal corrective lens containing them"
FR2762837B1 (en) * 1997-04-30 1999-07-16 Corning Sa HIGH REFRACTION INDEX GLASSES, MULTIFOCAL CORRECTIVE LENSES INCORPORATING THE SAME
DE19920865C1 (en) * 1999-05-06 2000-06-29 Schott Glas Lead-free optical borosilicate glass, for optical equipment and optical data applications, contains barium, zinc, titanium, niobium and rare earth oxides and has a high refractive index and a low Abbe number
FR2804676B1 (en) * 2000-02-04 2002-05-03 Corning Sa VERY HIGH REFRACTION INDEX GLASSES, MULTIFOCAL CORRECTIVE LENSES INCORPORATING THEM
CA2408225A1 (en) * 2001-03-13 2002-09-19 Corning Incorporated Ophthalmic segment glass with high nd
CN102674685B (en) * 2012-04-23 2014-08-27 湖北新华光信息材料有限公司 Optical glass
US11591253B2 (en) 2018-11-29 2023-02-28 Corning Incorporated High refractive index silicate glass compositions with reduced devitrification kinetics
CN109851217B (en) * 2018-12-07 2022-03-08 成都光明光电股份有限公司 Heavy lanthanum flint glass and prefabricated member, optical element and optical instrument thereof
EP4201898A1 (en) * 2021-12-21 2023-06-28 Schott Ag Glass composition, glass article and method of making it
CN116081942B (en) * 2023-02-08 2023-10-13 中建材光子科技有限公司 High-transmittance environment-friendly optical fiber core glass and preparation method thereof

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DE2623683C3 (en) * 1975-06-02 1979-10-04 Hoya Glass Works, Ltd., Tokio Glass for eye lenses with a refractive index of at least 40 and a specific gravity of no more than 3.1g / cm3
JPS5269915A (en) * 1975-12-10 1977-06-10 Hoya Glass Works Ltd Glass for lens of eyeglasses
DE3026605C2 (en) * 1980-07-14 1983-07-07 Schott Glaswerke, 6500 Mainz Acid-proof, hydrolytically stable optical and ophthalmic borosilicate glass of low density

Non-Patent Citations (1)

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Title
NICHTS-ERMITTELT *

Also Published As

Publication number Publication date
IT8267695A0 (en) 1982-05-31
ES8308291A2 (en) 1983-09-01
DE3121824C2 (en) 1984-06-14
JPS638056B2 (en) 1988-02-19
FR2510546A2 (en) 1983-02-04
IT1157016B (en) 1987-02-11
BR8203146A (en) 1983-05-17
ES512714A0 (en) 1983-09-01
GB2099417B (en) 1984-11-28
FR2510546B2 (en) 1985-10-25
GB2099417A (en) 1982-12-08
JPS57200249A (en) 1982-12-08

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