DE500284C - Process for the manufacture of glasses with high permeability for ultraviolet rays - Google Patents

Process for the manufacture of glasses with high permeability for ultraviolet rays

Info

Publication number
DE500284C
DE500284C DES85846D DES0085846D DE500284C DE 500284 C DE500284 C DE 500284C DE S85846 D DES85846 D DE S85846D DE S0085846 D DES0085846 D DE S0085846D DE 500284 C DE500284 C DE 500284C
Authority
DE
Germany
Prior art keywords
glasses
ultraviolet rays
high permeability
manufacture
manganese oxide
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.)
Expired
Application number
DES85846D
Other languages
German (de)
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.)
Compagnie de Saint Gobain SA
Original Assignee
Compagnie de Saint Gobain SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Compagnie de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
Application granted granted Critical
Publication of DE500284C publication Critical patent/DE500284C/en
Expired legal-status Critical Current

Links

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
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • 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
    • C03C4/00—Compositions for glass with special properties
    • C03C4/0085—Compositions for glass with special properties for UV-transmitting glass

Landscapes

  • 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)

Description

Verfahren zur Herstellung von Gläsern mit großer Durchlässigkeit für ultraviolette Strahlen Die bisher bekannten Gläser, welche eine große Durchlässigkeit für ultraviolette Strahlen besitzen, verlieren in der Regel mit der Zeit unter dem Einfluß dieser Strahlen einen beträchtlichen Teil dieser Durchlässigkeit. Der Grund liegt darin, daß die ultravioletten Strahlen vermittels des in den Gläsern in aufgelöstem Zustande befindlichen Sauerstoffes die Überoxydation eines Teiles des in ihnen enthaltenen Eisens verursachen, die sich durch eine gelbliche Färbung offenbart.Process for the production of glasses with high permeability for ultraviolet rays The previously known glasses, which have a large permeability Owning to ultraviolet rays usually lose under the time with time These rays influence a considerable part of this permeability. The reason lies in the fact that the ultraviolet rays by means of the dissolved in the glasses The oxygen in the state is the over-oxidation of part of that contained in them Cause iron, which is revealed by a yellowish color.

Die vorliegende Erfindung bezweckt die Beseitigung dieses Nachteiles. Die Erfindung besteht darin, daß der unter reduzierenden Bedingungen geschmolzenen Glasmasse eine geringe Menge, etwa 0,05 bis o,5 Prozent, Manganoxv,d beigemengt wird, das sich infolge dieser Reduktion, in Manganoxydul umgestaltet.The present invention aims to overcome this drawback. The invention consists in adding a small amount, about 0.05 to 0.5 percent, of manganese oxide, which is transformed into manganese oxide as a result of this reduction, to the glass mass melted under reducing conditions.

Der im Glas aufgelöste Sauerstoff verbindet sich vorzugsweise mit dem Manganoxvdul, so daß sich der Zustand des Eisenoxvduls im Glas unter dem Einfluß der ultravioletten Strahlen nicht ändert. Außerdem besitzt das durch die Verbindung des Sauerstoffs mit dein Manganoxvdul wiederhergestellte Manganoxyd kein Äbsorbierungsvermögen für die ultravioletten Strahlen, so,daß die Durchlässigkeit des Glases für diese Strahlen bestehen bleibt.The oxygen dissolved in the glass combines preferentially with the manganese oxide, so that the state of the iron oxide in the glass changes under the influence the ultraviolet rays do not change. Also owns that through the connection Manganese oxide recovered from the oxygen with your manganese oxide has no absorption capacity for the ultraviolet rays, so that the permeability of the glass for them Rays persist.

Das beschriebene Verfahren läßt sich ecensogut auch für Quarzglas oder geschmolzenen Quarz anweu,den, der für die betreffenden Strahlendurchlässig ist.The method described can also be used for quartz glass or fused quartz, which is transparent to the radiation in question is.

Claims (1)

PATENTANSPRUCFI Verfahren zur Herstellung von Gläsern mit großer Durchlässigkeit für ultraviolette Strahlen einschließlich Quarzgläsern, dadurch gekennzeichnet, daß das entsprechend -zusammengesetzte Glasgemenge unter reduzierenden Bedingungen und unter Zusatz einer geringen Menge (o,o5 bis o,5 Prozent) Manganoxyd geschinolzen wird.PATENT APPLICATION Process for the production of glasses with high permeability for ultraviolet rays including quartz glasses, characterized in that, that the corresponding -composed glass batch under reducing conditions and with the addition of a small amount (0.05 to 0.5 percent) of manganese oxide melted will.
DES85846D 1927-06-04 1928-05-31 Process for the manufacture of glasses with high permeability for ultraviolet rays Expired DE500284C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR500284X 1927-06-04

Publications (1)

Publication Number Publication Date
DE500284C true DE500284C (en) 1930-06-19

Family

ID=8905197

Family Applications (1)

Application Number Title Priority Date Filing Date
DES85846D Expired DE500284C (en) 1927-06-04 1928-05-31 Process for the manufacture of glasses with high permeability for ultraviolet rays

Country Status (1)

Country Link
DE (1) DE500284C (en)

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