DEJ0005909MA - - Google Patents
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- Publication number
- DEJ0005909MA DEJ0005909MA DEJ0005909MA DE J0005909M A DEJ0005909M A DE J0005909MA DE J0005909M A DEJ0005909M A DE J0005909MA
- Authority
- DE
- Germany
- Prior art keywords
- optical glass
- oxide
- glass according
- bao
- content
- 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.)
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- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 9
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Inorganic materials [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims description 8
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims description 7
- 239000005304 optical glass Substances 0.000 claims description 7
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims description 5
- LTPBRCUWZOMYOC-UHFFFAOYSA-N BeO Chemical compound O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 241000216690 Gracula religiosa Species 0.000 claims description 2
- 239000011521 glass Substances 0.000 description 10
- GEIAQOFPUVMAGM-UHFFFAOYSA-N oxozirconium Chemical compound [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 5
- CXKCTMHTOKXKQT-UHFFFAOYSA-N Cadmium oxide Chemical compound [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N Boron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 229910052776 Thorium Inorganic materials 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium(0) Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 229910001941 lanthanum oxide Inorganic materials 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 230000003287 optical Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000002285 radioactive Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- ZSLUVFAKFWKJRC-UHFFFAOYSA-N thorium Chemical compound [Th] ZSLUVFAKFWKJRC-UHFFFAOYSA-N 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 231100000614 Poison Toxicity 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000005712 crystallization Effects 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Description
BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY
Tag der Anmeldung: 26. Mai 1952 Bekanntgemacht am 16. Februar 1956Registration date: May 26, 1952. Advertised on February 16, 1956
DEUTSCHES PATENTAMTGERMAN PATENT OFFICE
Die bisher bekanntgewordenen optischen Gläser mit einer Brechungszahl na > 1,70 und einem Wert der Abbeschen Zahl ν zwischen 42 und 52 enthalten entweder größere Mengen des teuren Tantals, des giftigen Berylliums oder des radioaktiven Thoriums, oder sie zeigten Neigung zur Kristallisation, z. B. die Gläser mit hohem Gehalt an Kadmiumoxyd (CdO), oder waren stark gefärbt, wie z. B. die Gläser mit hohem Gehalt an Wolframoxyd (WO3). Nach der Erfindung lassen,sich jedoch ohne Verwendung des Berylliums und des Thoriums bei Verwendung nur kleiner Mengen des Tantals giftfreie, nicht radioaktive und nicht allzu teure farblose Gläser der gewünschten optischen Lage, die von der Neigung zur Kristallisation frei sind, erzielen, wenn man sie so zusammensetzt, daß sie frei von BeO und ThO2 sind und höchstens 3°/0 Ta2O5 enthalten und aus 25 bis 38% Lanthanoxyd (La2O3), 4 bis i8°/0 Bleioxyd (PbO), 30 bis 48% Bortrioxyd (B2O3) sowie aus 9 bis 30% Calciumoxyd (CaO), Strontiumoxyd (SrO), Bariumoxyd (BaO) und Zinkoxyd (ZnO) einzeln oder als Gemisch bestehen.The previously known optical glasses with a refractive index n a > 1.70 and an Abbe number ν between 42 and 52 either contain large amounts of the expensive tantalum, poisonous beryllium or radioactive thorium, or they showed a tendency to crystallize, e.g. B. the glasses with a high content of cadmium oxide (CdO), or were strongly colored, such. B. the glasses with a high content of tungsten oxide (WO 3 ). According to the invention, however, without using the beryllium and the thorium and using only small amounts of the tantalum, poison-free, non-radioactive and not too expensive colorless glasses of the desired optical position, which are free from the tendency to crystallize, can be achieved if they are used so composed that they are free of BeO and ThO 2 and a maximum of 3 ° / 0 Ta 2 O 5 and from 25 to 38% lanthanum oxide (La 2 O 3), 4 to i8 ° / 0 lead oxide (PbO), 30 to 48% boron trioxide (B 2 O 3 ) and 9 to 30% calcium oxide (CaO), strontium oxide (SrO), barium oxide (BaO) and zinc oxide (ZnO) individually or as a mixture.
509 658/239509 658/239
J 5909IVc/32 bJ 5909IVc / 32 b
In diese Gläser läßt sich unschwierig Zirkonoxyd (ZrO2) in Mengen bis zu 8,5 °/„ einführen, wodurch die chemische Haltbarkeit beträchtlich erhöht wird. Zirconium oxide (ZrO 2 ) can easily be introduced into these glasses in quantities of up to 8.5%, which considerably increases the chemical durability.
Ebenso kann das Glas noch bis zu 6% Siliciumdioxyd (SiO2) enthalten.The glass can also contain up to 6% silicon dioxide (SiO 2 ).
Im- allgemeinen ist es günstig, den Gehalt an den genannten zweiwertigen Bestandteilen CaO, SrO, BaO und ZnO insgesamt unter 22°/0 zu halten, da dann die Schmelzen besonders wenig zur Kristallisation neigen.Im- general, it is desirable to keep the content of the above-mentioned divalent constituents CaO, SrO, BaO and ZnO in total less than 22 ° / 0 since then, the melts are particularly prone to crystallize little.
Es empfiehlt sich, den Bariumoxydgehalt nicht über 5 °/0 ansteigen zu lassen, da sonst Neigung zur Kristallisation zu befürchten ist.It is advisable not to let rise 0 Bariumoxydgehalt the above 5 ° /, otherwise inclination is to be feared for crystallization.
Falls man Brechungszahlen von ungefähr 1,715 und darüber wünscht, läßt man zweckmäßig den Gehalt an La2O3 und PbO zusammen mehr als 37 % betragen..If you want refractive indices of around 1.715 and above, it is advisable to allow the La 2 O 3 and PbO content together to be more than 37%.
Ein Austausch von Lanthanoxyd gegen Bleioxyd in gleichen Anteilen bei sonst unveränderter Glaszusammensetzung ändert den w^-Wert nicht, doch verkleinert sich der w-Wert um ungefähr 0,4 je i°/0 ausgetauschtes Oxyd.An exchange of lanthanum oxide to lead oxide in equal proportions with otherwise unchanged glass composition does not change the w ^ value, but the w value decreased by about 0.4 per i ° / 0 exchanged oxide.
Die Herstellung der erfindungsgemäßen Gläser erfolgt wegen deren Dünnflüssigkeit zweckmäßig im Platintiegel.The production of the glasses according to the invention is expediently carried out in the Platinum crucible.
Natürlich lassen sich in diese Gläser noch andere Glasbestandteile, z. B. Alkalioxyde, Magnesiumoxyd (MgO) u. a., in Mengen bis höchstens 3°/0 insgesamt · einschließlich Tantaloxyd (Ta2O5) einführen, ohne daß dadurch das Wesen der Erfindung berührt wird. .-ιOf course, other glass components can also be used in these glasses, e.g. Introduce in amounts of up to more than 3 ° / 0 · total including tantalum oxide (Ta 2 O 5), without thereby the essence of the invention is affected as alkali oxides, magnesium oxide (MgO), and others. .-ι
Die folgende Tafel zeigt eine Anzahl von Beispielen der erfindungsgemäßen Gläser nach ihrer Zusammen- Z Setzung und ihrer optischen Lage.The following table shows a number of examples of glasses of the invention on their composition, Z and reduction of their optical position.
SiO2 .SiO 2 .
B2O3 .B 2 O 3 .
La2O3 La 2 O 3
ZrO2 .
PbO..ZrO 2 .
PbO ..
CaO..CaO ..
SiO ..SiO ..
BaO..BaO ..
ZnO .
nd.... ZnO.
n d ....
νν
38,3 28,538.3 28.5
—-
ii,3 14,5ii, 3 14.5
7,47.4
!,744 48,0!, 744 48.0
Claims (6)
Family
ID=
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