DE3206226A1 - Optical and ophthalmic glass having a refractive index of >/=1.56, an Abbe number of >/=40 and a density of </=2.70 g/cm<3> - Google Patents

Optical and ophthalmic glass having a refractive index of >/=1.56, an Abbe number of >/=40 and a density of </=2.70 g/cm<3>

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Publication number
DE3206226A1
DE3206226A1 DE19823206226 DE3206226A DE3206226A1 DE 3206226 A1 DE3206226 A1 DE 3206226A1 DE 19823206226 DE19823206226 DE 19823206226 DE 3206226 A DE3206226 A DE 3206226A DE 3206226 A1 DE3206226 A1 DE 3206226A1
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Germany
Prior art keywords
weight
glass
abbe number
refractive index
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE19823206226
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German (de)
Inventor
Volkmar Geiler
Georg Dipl.-Ing. Dr. 6500 Mainz Gliemeroth
Karl Dr. 6204 Taunusstein Mennemann
Ludwig Dipl.-Chem. Dr. 6501 Klein-Winternheim Roß
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 AG
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Filing date
Publication date
Application filed by Schott Glaswerke AG filed Critical Schott Glaswerke AG
Priority to DE19823206226 priority Critical patent/DE3206226A1/en
Priority to JP58017567A priority patent/JPS58145638A/en
Priority to IT67154/83A priority patent/IT1193419B/en
Priority to GB08304287A priority patent/GB2115403B/en
Priority to FR8302574A priority patent/FR2521978B1/fr
Priority to DD83248077A priority patent/DD207698A5/en
Priority to US06/467,722 priority patent/US4562161A/en
Publication of DE3206226A1 publication Critical patent/DE3206226A1/en
Priority to US06/854,715 priority patent/US4719186A/en
Ceased 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
    • 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
    • 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen
    • C03C3/112—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine
    • C03C3/115—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen
    • C03C3/112—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine
    • C03C3/115—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine containing boron
    • C03C3/118—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine containing boron containing aluminium

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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)
  • Ceramic Engineering (AREA)
  • Glass Compositions (AREA)

Abstract

A novel optical or ophthalmic glass of high refractive index, high Abbe number and low density which is distinguished by good chemical resistance, excellent crystallisation behaviour and suitability for chemical curing, comprises (in % by weight): 47-75 SiO2, 1-18 B2O3, 0-5 Al2O3, 0-5 P2O5, 0-8 Li2O, 4-10 Na2O, 4-10 K2O, 0-7 MgO, 0-14 CaO, 0-4 SrO, 0-4 BaO, 0-3 ZnO, 5-12.8 TiO2, 0-6 ZrO2, 0-5 Nb2O5.

Description

B) BeschreibungB) description

Ziel der Erfindung ist es, einen Zusammensetzungsbereich für ein optisches bzw. ophthalmisches Glas mit einem Brechwert # 1,56, einer Abbezahl im Bereich # 40 3 einer Dichte t 2,70 g/cm zu finden, wobei das Glas im Aufschmelzbereich von 1200 bis 13000C eine genügend hohe Viskosität ( a 50 d Pas) für die Produzierbarkeit in einem kontinuierlich arbeitenden keramischen Schmelzaggregat besitzt. Darüber hinaus soll das Glas für Licht der Wellenlänge C 350 nm undurchlässig sein. Für die Produzierbarkeit eines solchen Brillenglases (Massenglas) ist das Kristallisationsverhalten im Verarbeitungsbereich unterhalb 104 d Pas von Bedeutung. In diesem Bereich dürfen keine Entglasungserscheinungen auftreten. Zur Sicherheit des Brillenträgers muß ein solches Glas eine sehr gute chemische Härtbarkeit aufweisen. Dadurch wird es gleichzeitig möglich, die Dicke des Brillenglases weiter zu reduzieren, um so ein geringeres Gewicht der Brille zu ermöglichen.The aim of the invention is to provide a composition range for an optical or ophthalmic glass with a refractive index # 1.56, an Abbe number in the range # 40 3 to find a density t 2.70 g / cm, the glass in the melting range of 1200 to 13000C a sufficiently high viscosity (a 50 d Pas) for producibility in a continuously operating ceramic melting unit. About that In addition, the glass should be impermeable to light with a wavelength of C 350 nm. For the producibility of such a spectacle lens (mass lens) is the crystallization behavior important in the processing range below 104 d Pas. In this area are allowed no devitrification phenomena occur. For the safety of the spectacle wearer must such a glass have very good chemical hardenability. This is how it becomes at the same time possible to further reduce the thickness of the spectacle lens in order to achieve a to allow lower weight of the glasses.

Eine kostengünstige Bearbeitung eines Brillenglases setzt eine gute chemische Beständigkeit (Schleifen, Polieren, Waschen) voraus. Bei der Benutzung der Brille dürfen aggressive Substanzen, wie verdünnte Säuren, Fruchtsäfte, Schweiß usw. die Glasoberfläche auch über längere Zeit nicht sichtbar angreifen.An inexpensive processing of a spectacle lens implies a good one chemical resistance (grinding, polishing, washing). When using The glasses may contain aggressive substances such as diluted acids, fruit juices, sweat etc. do not visibly attack the glass surface even over a long period of time.

Der heutige Stand der Technik wird eingehend in der Patentanmeldung vom 2.lO.SJ AZ: P 31 39 212.1 dargestellt. In dieser Anmeldung wird erstmals ein Zusammensetzungsbereich für ein optisches und ophthalmisches Glas mit einem Brechwert # 1,58, einer Abbezahl # 45 und einer Dichte # 2,75 g.The current state of the art is detailed in the patent application from 2.10.SJ AZ: P 31 39 212.1 shown. This application is the first time a Composition range for an optical and ophthalmic glass with a refractive power # 1.58, an Abbe number # 45 and a density # 2.75 g.

sowie ausgezeichneter Eignung für die chemische Härtung beansprucht. Alle vorhergehenden Patente bezüglich Gläser in dem Brechwertbereich 1,55 bis 1,60 und dem Abbezahlbereich > 43 (JP-OS 79. 10,882, GB OS 20 29 401 und JP OS 81 59,640) ermöglichen mit ihrem Zusammensetzungsbereich jedoch keine Gläser mit einer Dichte von weniger als 2,70, bei einem Brechwert von 1,60 und einer Abbezahl von 43 bis 50. Die JP-OS 81 59 640 beschreibt zwar Gläser mit einer Dichte von 2,60 und Brechzahlen um 1,60, die Dispersion liegt jedoch mit einer Abbezahl um 40 in einem Bereich, der bei Brillen zu störenden Farbsäumen führt. Andererseits ist in der Patentanmeldung vom 2.10.81 AZ: P 31 39 212.1 der Schwerpunkt auf Gläser mit Abbezahlen größer 50 gelegt. as well as excellent suitability for chemical hardening. All of the previous patents relating to glasses in the range of 1.55 to 1.60 power and the Abbezahlbereich> 43 (JP-OS 79.10,882, GB OS 20 29 401 and JP OS 81 59.640) however, do not allow them with their compositional range Glasses with a density of less than 2.70, with a refractive index of 1.60 and one Abbe number from 43 to 50. JP-OS 81 59 640 describes glasses with a density of 2.60 and refractive indices around 1.60, but the dispersion has an Abbe number by 40 in an area that leads to annoying color fringes in glasses. on the other hand In the patent application dated October 2nd, 1981 AZ: P 31 39 212.1, the focus is on glasses placed with Abbezahlen greater than 50.

Zwar ermöglicht der Zusammensetzungsbereich in der Patentanmeldung auch Abbezahlen von 45 bis 50, jedoch sind diese Gläser wegen ihrer starken Kristallisationsneigung für die kontinuierliche Fertigung einesMassenglases nicht geeignet.Admittedly, the composition range in the patent application allows also Abbezahlen from 45 to 50, however, these glasses are because of their strong tendency to crystallize not suitable for the continuous production of a bulk glass.

Um allen oben dargelegten Forderungen gerecht zu werden1 war es deshalb notwendig, einen ncuen Zusammensetzungsbereich zu finden. Ein solcher Bereich ist dadurch gekennzeichnet, daß die Summe aller glasbildenden Oxide 57 bis 82 Gew.-% beträgt, wobei im einzelnen enthalten sein rnüssen (Gew.-%):-SiO2 47-75, B2O3 1-18, Al2O3 0-5, P2O5 0-5, bevorzugt jedoch 60-78 Gew.-% Glasbildner und im einzelnen (Gew.-%): SiO2 49-68, B,O, 1-8, Al203 0,5-3, P205 0-1,5, die Summe der Alkalioxide 10 bis 17, bevorzugt jedoch 10 bis 15 und im einzelnen (Gew.-%): Li2O 0-8, Na2O 5-10, K20 5-10 bzw. Li2O 3-8, Na20 0,5-7, K20 5-7, die Summe der Erdalkalioxide PbO und ZnO bevorzugt 0-3 Gew.-% und im einzelnen (Gew.-%): MgO 0-7, CaO 0-14, SrO 0-4, BaO 0-4, ZnO 0-3, PbO 0-5 und weitere Komponenten entsprechend (Gew.-%): TiO2 5-12,8 bevorzugt 8-12 ZrO2 0-6 * 0 2 0-2 F- # 1 sowie weitere Oxide enthalten kann (Gew.-%): Nb2O5 0 - 3 Y203 0-3 La2O3 0 - 8 WO3 0 - 5 Ta2O5 0 - 3 und nicht mehr als 2 Gew.-% der hier noch nicht genannten Oxide. Zur Läuterung wird eines der üblichen Läutermittel, wie beispielsweise As203 mit 0,1 bis 1 Gew.-% zugesetzt.It was therefore in order to meet all the requirements set out above1 necessary to find a new composition range. One such area is characterized in that the sum of all glass-forming oxides 57 to 82 wt .-% , where the nuts (% by weight) are contained: - SiO2 47-75, B2O3 1-18, Al2O3 0-5, P2O5 0-5, but preferably 60-78% by weight of glass former and in detail (% By weight): SiO2 49-68, B, O, 1-8, Al203 0.5-3, P205 0-1.5, the sum of the alkali oxides 10 to 17, but preferably 10 to 15 and in detail (% by weight): Li2O 0-8, Na2O 5-10, K20 5-10 or Li2O 3-8, Na20 0.5-7, K20 5-7, the sum of the alkaline earth oxides PbO and ZnO preferably 0-3% by weight and in particular (% by weight): MgO 0-7, CaO 0-14, SrO 0-4, BaO 0-4, ZnO 0-3, PbO 0-5 and other components accordingly (% by weight): TiO2 5-12.8 preferred 8-12 ZrO2 0-6 * 0 2 0-2 F- # 1 and other oxides may contain (% by weight): Nb2O5 0 - 3 Y203 0-3 La2O3 0 - 8 WO3 0 - 5 Ta2O5 0 - 3 and not more than 2% by weight of the oxides not yet mentioned here. Becomes purification one of the usual refining agents, such as, for example, As203 with 0.1 to 1% by weight added.

Die erfindungsgemäßen Gläser vereinigen in sich sowohl die Forderung nach hohem Brechwert und hoher Abbezahl bei niedrigster Dichte, als auch ausgezeichneter chemischer Beständigkeit, ausgezeichnetem Kristallisationsverhalten, chemischer Härtbarkeit und günstigem Viskositätsverlauf beim Einschmelzen im Keramikbecken.The glasses according to the invention combine both the requirement for high refractive index and high Abbe number at the lowest density, as well as excellent chemical resistance, excellent crystallization behavior, chemical Hardenability and favorable viscosity profile when melting in the ceramic basin.

Gegenüber den in den oben zitierten OS und Anmeldung besitzen die hier beschriebenen Gläser den Vorteil, daR sie bei den für eine vollständige Aufschmelzung notwendigen Temperaturen von 1200 bis 13000C eine Viskosität von mehr als 50 d Pas haben. Gläser, die bei niedrigerer Viskosität eingeschmolzen werden, neigen dazu, das keramische Wannenmaterial anzugreifen und somit die Standzeit des Schmelzaggregates erheblich zu reduzieren.Compared to the OS and application cited above, the The glasses described here have the advantage that they allow for complete melting necessary temperatures of 1200 to 13000C a viscosity of more than 50 d Pas to have. Glasses that are melted down at a lower viscosity tend to to attack the ceramic tank material and thus the service life of the melting unit to reduce significantly.

Gegenüber den Beispielen der Patentanmeldung vom 2.10.81 A: 1> 31 39 212.1 wird die Kristallisationsstabilität im Abbezahlbereich von 1 50 wesentlich verbessert, wenn der Natrium- bzw. Kaliumoxidgehalt mehr als 5 Gew.-°S beträgt.Compared to the examples of the patent application dated October 2, 1981 A: 1> 31 39 212.1, the crystallization stability in the Abbe number range of 1 50 becomes essential improved if the sodium or potassium oxide content is more than 5% by weight.

Gleichzeitig bewirkt der hohe Na- und K-Gehalt neben mehr als 3 Gew.-% Li2O eine sehr gute chemische Härtbarkeit im Na- bzw. K-Salzbad.At the same time, the high Na and K content in addition to more than 3% by weight Li2O has a very good chemical hardenability in a Na or K salt bath.

Die in der Patentanmeldung vom 2.10.81 AZ: P 31 39 212.1 geforderte hohe Abbezahl ist nicht notwendig, da die bei Brillengläsern auftretenden Farbsäume erst ab einem vd < < 42 auftreten und für den Brillenträger störend wirken können.The one required in the patent application dated October 2, 1981 AZ: P 31 39 212.1 a high Abbe number is not necessary because of the color fringing that occurs with spectacle lenses only from a vd <<42 occur and for the wearer of glasses can be disturbing.

Es ist daher möglich, durch Erhöhen des TiO2-Gehaltes auf bis zu 12 Gew.-% das Verhältnis von hohem Brechungsindex zu niedriger Dichte beizubehalten und gleichzeitig eine Abbezahl zwischen 42 und 50 einzustellen.It is therefore possible to increase the TiO2 content up to 12 % By weight to maintain the ratio of high refractive index to low density and at the same time set an Abbezahl between 42 and 50.

Tabelle 1 enthält 9 Ausführungsbeispiele im bevorzugten Zusammen setzung sbereich.Table 1 contains 9 exemplary embodiments in the preferred composition area.

Die erfindungsgemänen Gläser werden folgendermaßen hergestellt: Die Rohstoffe (Oxide, Carbonate, Nitrate, evtl. Fluoride) werden abgewogen, ein Läutermittel, wie As203, in Anteilen von 0,1 - 1 Gew.-% zugegeben und anschließend gut gemischt.The glasses according to the invention are produced as follows: The Raw materials (oxides, carbonates, nitrates, possibly fluorides) are weighed, a refining agent, like As203, added in proportions of 0.1-1% by weight and then mixed well.

Das Glasgemenge wird bei ca. 12500C im Keramikbecken oder Pt-Tiegel eingeschmolzen, danach geläutert und mittels eines Rührers gut homogenisiert. Bei einer Gußtemperatur von etwa 8500C wird das Glas zu Brillenglasrohlingen verpreßt.The glass mixture is placed in a ceramic basin or Pt crucible at approx. 12500C melted, then refined and homogenized well using a stirrer. at At a casting temperature of around 8500C, the lens is pressed to form spectacle lens blanks.

Schmelzbeispiel für 1000 kg berechnetes Glas Oxid Gew.-% Rohstoff Einwaage (kg) SiO2 58,00 Quarzmehl 580,9 B203 8,00 H3B03 141,8 Al 203 1,30 AlOOH 16,6 Li2O 7,50 Li2CO3 187,5 Na2O 4,50 Na2CO3 77,3 Na2O 0,70 NaNO3 19 3 K20 5,05 2 3 74,0 TiO2 11,50 T102 115,8 ZrO2 0,30 ZrO2 3,0 Nb2O5 0,15 Nb2O5 1,5 CaO 1,30 CaC03 23,1 MgO 1,60 MgC03 36,5 As2O3 0,10 As2O3 1,0 1 278,3 kg Gemenge Die Eigenschaften dieses Glases sind in Tabelle 1, Beispiel 2, angegeben.Melting example for 1000 kg calculated glass oxide wt .-% raw material Weight (kg) SiO2 58.00 Quartz powder 580.9 B203 8.00 H3B03 141.8 Al 203 1.30 AlOOH 16.6 Li2O 7.50 Li2CO3 187.5 Na2O 4.50 Na2CO3 77.3 Na2O 0.70 NaNO3 19 3 K20 5.05 2 3 74.0 TiO2 11.50 T102 115.8 ZrO2 0.30 ZrO2 3.0 Nb2O5 0.15 Nb2O5 1.5 CaO 1.30 CaC03 23.1 MgO 1.60 MgC03 36.5 As2O3 0.10 As2O3 1.0 1 278.3 kg mixture The properties of this glass are given in Table 1, Example 2.

Zur chemischen Härtung werden die geschliffenen und polierten Gläser 4 Stunden lang in eine NaN03- oder KN03-Schmelze von 400°C getaucht. Die ausgetauschte Schicht hat eine Dicke von 65 bis 100/um und eine Druckspannung von 5000 - 8000 nm/cm.The ground and polished glasses are used for chemical hardening Immersed in a NaN03 or KN03 melt at 400 ° C for 4 hours. The exchanged Layer has a thickness of 65 to 100 µm and a compressive stress of 5000 - 8000 nm / cm.

Tabelle 1 Bsp. 1 2 3 4 5 6 | 7 8 9 Oxid SiO2 60.20 58,00 56,64 50,00 52,50 57,00 58,00 59,00 60,00 B203 6,00 8,00 8,00 7,60 5,90 7,50 7,50 6,60 6,60 A12°3 1,20 1,30 1,22 2,50 2,00 1,80 1,50 1,6O 1,65 P205 - - - - 0, 70 - - 50 - Li20 5.90 7,50 8,01 8.00 7,70 8,00 8,00 7,00 8,00 2 Na20 5,10 5,20 5,38 6,50 6,00 5,10 6,00 6,00 5,60 K20 5,00 5,05 5.08 5,00 5,60 6,30 6,00 6,20 7,00 MgO 1,10 1,60 1,10 1,00 0,80 0,90 0,60 1,20 0,25 Ca0 1,90 1,30 1,90 0,90 0,60 0,50 0,50 1,50 0,00 ZnO - - - - 0,10 1,60 1,30 - - TiO2 12,00 11,50 8,10 9,50 8,00 8,50 10,00 8,70 9,90 Zur02 1.00 0,30 2,01 1,80 2,00 1,00 0,50 0,80 0,50 Nb205 0,90 0.15 O,92 2,50 0.80 0,55 - - - NaF - - - - - - - 0,90 0,50 Y203 - - 0.87 1,30 2,50 0,50 - - - Pa203 - - 0,77 1.50 - - - - - W03 - - - 1,80 2,80 0,75 - - - Ta205 - - - - 0,50 - - - - PbO - - - - 1,50 - - - - nd 1,5984 1,5970 1.5983 1.6182 1,6076 1,5892 1,5904 1,5811 1,5787 vd 43,09 43,80 47,30 43,32 44,82 47,05 45,97 47,47 46,35 3 tg/cm3 2.591 2,578 2,617 2,695 2,670 2.598 2,588 2,578 2,579 Table 1 Example 1 2 3 4 5 6 | 7 8 9 oxide SiO2 60.20 58.00 56.64 50.00 52.50 57.00 58.00 59.00 60.00 B203 6.00 8.00 8.00 7.60 5.90 7.50 7.50 6.60 6.60 A12 ° 3 1.20 1.30 1.22 2.50 2.00 1.80 1.50 1.60 1.65 P205 - - - - 0.70 - - 50 - Li20 5.90 7.50 8.01 8.00 7.70 8.00 8.00 7.00 8.00 2 Na20 5.10 5.20 5.38 6.50 6.00 5.10 6.00 6.00 5.60 K20 5.00 5.05 5.08 5.00 5.60 6.30 6.00 6.20 7.00 MgO 1.10 1.60 1.10 1.00 0.80 0.90 0.60 1.20 0.25 Ca0 1.90 1.30 1.90 0.90 0.60 0.50 0.50 1.50 0.00 ZnO - - - - 0.10 1.60 1.30 - - TiO2 12.00 11.50 8.10 9.50 8.00 8.50 10.00 8.70 9.90 To 02 1.00 0.30 2.01 1.80 2.00 1.00 0.50 0.80 0.50 Nb205 0.90 0.15 O, 92 2.50 0.80 0.55 - - - NaF - - - - - - - 0.90 0.50 Y203 - - 0.87 1.30 2.50 0.50 - - - Pa203 - - 0.77 1.50 - - - - - W03 - - - 1.80 2.80 0.75 - - - Ta205 - - - - 0.50 - - - - PbO - - - - 1.50 - - - - nd 1.5984 1.5970 1.5983 1.6182 1.6076 1.5892 1.5904 1.5811 1.5787 vd 43.09 43.80 47.30 43.32 44.82 47.05 45.97 47.47 46.35 3 tg / cm3 2,591 2,578 2,617 2,695 2,670 2,598 2,588 2,578 2,579

Claims (4)

Optisches und ophthalmisches Glas mit Brechwerten # 1,56.Optical and ophthalmic glass with a refractive index of # 1.56. Abbezahlen von # 40 und Dichten < 2,70 g/cm³ A) Patentansprüche 1. Optisches und ophthalmisches Glas mit Brechwerten # 1,56, Abbezahlen von 40 - 50 und Dichten # 2,70 g/cm³, gekennzeichnet durch folgende Zusammensetzung (in Gew.-%) : SiO2 47 - 75 B203 1 - 18 Al2O3 0 - 5 P2O5 0 - 5 SiO2+B2O3+Al2O3 + P2O5 57 - 82 Li20 0 - 8 Na2O 4 - 10 K2O 4 - 10 # M20 9 - 17 MgO O - 7 CaO 0 - 14 SrO 0 - 4 BaO 0-4 ZnO O - 3 TiO2 5 - 12,8 ZrO2 0 - 6 Nb2O5 0 - 5 F- # 1.Paying off # 40 and densities <2.70 g / cm³ A) Claims 1. Optical and ophthalmic glass with refractive indices # 1.56, Abbezahl 40 - 50 and densities # 2.70 g / cm³, characterized by the following composition (in% by weight) : SiO2 47 - 75 B203 1 - 18 Al2O3 0 - 5 P2O5 0 - 5 SiO2 + B2O3 + Al2O3 + P2O5 57 - 82 Li20 0 - 8 Na2O 4 - 10 K2O 4 - 10 # M20 9 - 17 MgO O - 7 CaO 0 - 14 SrO 0 - 4 BaO 0-4 ZnO O - 3 TiO2 5 - 12.8 ZrO2 0 - 6 Nb2O5 0 - 5 F- # 1. 2. Glas nach Anspruch 1, gekennzeichnet durch folgende Zusammensetzung (in Gew.-%): SiO2 49 - 68 B2O3 3 - 8 A1203 0,5 - 3 P205 0 - 1,5 SiO2+ B203+ A1203 + P2O5 60 - 78 Li2O 3 - 8 Na2O 5 - 7 K2O 5 - 7 X M20 10 - 15 MgO O - 3 CaO O - 3 ZnO O - 3 #MO O - 3 TiO2 8 - 12 Zr02 O - 2 Nb 205 0 - 3 Y2O3 0 - 3 F- # 1 2. Glass according to claim 1, characterized by the following composition (in% by weight): SiO2 49 - 68 B2O3 3 - 8 A1203 0.5 - 3 P205 0 - 1.5 SiO2 + B203 + A1203 + P2O5 60 - 78 Li2O 3 - 8 Na2O 5 - 7 K2O 5 - 7 X M20 10 - 15 MgO O - 3 CaO O - 3 ZnO O - 3 #MO O - 3 TiO2 8 - 12 Zr02 O - 2 Nb 205 0 - 3 Y2O3 0 - 3 F- # 1 3. Glas nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß es enthält (in Gew.-%): La2O3 0 - 8 WO3 0 - 5 Ta 205 0 - 3 3. glass according to claim 1 or 2, characterized in that it contains (in% by weight): La2O3 0 - 8 WO3 0 - 5 Ta 205 0 - 3 4. Glas nach Anspruch 1 - 3, dadurch gekennzeichnet, daß es enthält (in Gew.-%): PbO 0 - 5 wobei die Summe PbO + MgO + CaO + SrO + BaO + ZnO # sein soll.4. Glass according to claim 1-3, characterized characterized in that it contains (in% by weight): PbO 0-5 where the sum is PbO + MgO + CaO + SrO + BaO + ZnO # should be.
DE19823206226 1982-02-20 1982-02-20 Optical and ophthalmic glass having a refractive index of >/=1.56, an Abbe number of >/=40 and a density of </=2.70 g/cm<3> Ceased DE3206226A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE19823206226 DE3206226A1 (en) 1982-02-20 1982-02-20 Optical and ophthalmic glass having a refractive index of >/=1.56, an Abbe number of >/=40 and a density of </=2.70 g/cm<3>
JP58017567A JPS58145638A (en) 1982-02-20 1983-02-07 Optical and ophthalmic glass with refractive index 1.56, abbe's no 40 and density 2.70 g/cm3
IT67154/83A IT1193419B (en) 1982-02-20 1983-02-14 OPTICAL AND OPHTHALMIC LENS WITH REFRACTION VALUES GREATER OR EQUAL TO ONE AND FIFTY SIX, NUMBERS OF ABBE GREATER OR EQUAL TO QUARTER AND DENSITY LESS OR EQUAL TO TWO AND SEVENTY GRAMS ON CENTIMETERS CUBES
GB08304287A GB2115403B (en) 1982-02-20 1983-02-16 Optical and opthalmic glass
FR8302574A FR2521978B1 (en) 1982-02-20 1983-02-17
DD83248077A DD207698A5 (en) 1982-02-20 1983-02-18 OPTICAL AND OPHTHALMIC GLASS
US06/467,722 US4562161A (en) 1982-02-20 1983-02-18 Optical and ophthalmic glass with refractive indices greater than or equal to 1.56, Abbe numbers greater than or equal to 40 and densities less than or equal to 2.70 g/cm3
US06/854,715 US4719186A (en) 1982-02-20 1986-04-16 Optical and ophthalmic glass with refractive indices greater than or equal to 1.56, Abbe numbers greater than or equal to 40 and densities less than or equal to 2.70 g/cm3

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DE19823206226 DE3206226A1 (en) 1982-02-20 1982-02-20 Optical and ophthalmic glass having a refractive index of >/=1.56, an Abbe number of >/=40 and a density of </=2.70 g/cm<3>

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JPS5918131A (en) * 1984-01-27 1984-01-30 Nippon Kogaku Kk <Nikon> Light-weight optical glass
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BR9506088A (en) * 1994-12-27 1997-12-23 Corning Inc Corrective lenses and glass for ophthalmic applications
DE102004011218B4 (en) * 2004-03-04 2006-01-19 Schott Ag X-ray opaque glass, process for its preparation and its use
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JP7086339B2 (en) * 2017-06-27 2022-06-20 日本電気硝子株式会社 Manufacturing method of optical glass lens and optical glass lens
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10133963A1 (en) * 2001-07-17 2003-02-06 Schott Glas Boroalkali silicate glass used e.g. as substrate glass in display technology for plasma display panels comprises oxides of silicon, aluminum, boron, sodium, potassium, zinc, titanium and zirconium
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Also Published As

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IT1193419B (en) 1988-06-22
JPS58145638A (en) 1983-08-30
JPS6311292B2 (en) 1988-03-14
IT8367154A0 (en) 1983-02-14

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