DE850786C - Process for the production of reflection-changing surface layers on glass, transparent plastics or the like. - Google Patents

Process for the production of reflection-changing surface layers on glass, transparent plastics or the like.

Info

Publication number
DE850786C
DE850786C DEO688D DEO0000688D DE850786C DE 850786 C DE850786 C DE 850786C DE O688 D DEO688 D DE O688D DE O0000688 D DEO0000688 D DE O0000688D DE 850786 C DE850786 C DE 850786C
Authority
DE
Germany
Prior art keywords
glass
surface layers
reflection
production
transparent plastics
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
DEO688D
Other languages
German (de)
Inventor
Franz Dipl-Ing Dr-Ing Mantler
Josef Dr-Ing Schnell
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.)
Optische Werke CA Steinheil Soehne GmbH
Original Assignee
Optische Werke CA Steinheil Soehne GmbH
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 Optische Werke CA Steinheil Soehne GmbH filed Critical Optische Werke CA Steinheil Soehne GmbH
Priority to DEO688D priority Critical patent/DE850786C/en
Application granted granted Critical
Publication of DE850786C publication Critical patent/DE850786C/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
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
    • 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
    • C03C2217/00—Coatings on glass
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/28—Other inorganic materials
    • C03C2217/284—Halides
    • C03C2217/285—Fluorides
    • 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
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/15—Deposition methods from the vapour phase
    • C03C2218/151—Deposition methods from the vapour phase by vacuum evaporation

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)
  • Physical Vapour Deposition (AREA)

Description

Verfahren zur Herstellung von reflexionsändernden Oberflächenschichten auf Glas, durchsichtigen Kunststoffen od. dgl. Es ist bekannt, durch Aufdampfen von ein oder mehreren dünnen Schichten aus Calriumfluori,d oder anderen Fluoriden die Reflexionseigenschaften durchsichtiger Materialien, wie Glas, Kunststoffe u. a., zu verändern. Da die Dicke der Schichten hierbei bekanntlich nach bestimmten Interferenz= bedingungen zu bemessen ist, treten häufig bei dem zur Herstellung der Schichten benötigten Aufdampfprozeß, der im Vakuum vorzunehmen ist, insofern Schwierigkeiten auf, als das Aufdampfgut während des Aufdampfvorganges infolge Gasbildung zerspratzt. Hierdurch ist aber eine gleichmäßige und ungestörte Bildung der Schichten nicht immer gewährleistet. So kann z. B. gasförmiges Siliciumtetrafluorid entstehen, das bei der thermischen Zersetzung von kieselfluorsauren Salzen (Calcittmsilikofluorid), die als Verunreinigung in den Aufdampfmaterialien enthalten sind, gebildet wird. Die erzeugten Gase treten aus dem Schmelzfluß des Verdampfungsofens aus und verbrennen, so daß ein Zerspratzen des Aufdampfgutes die Folge ist. Auf die gleiche Ursache sind auch Schwankungen des Vakuums zurückzuführen, die sich ebenfalls störend bemerkbar machen. Diese Nachteile werden durch die vorliegende ]-Erfindung vermieden, indem dem Aufdampfgut ein nach seinem Versäuerungsgrad bemessener Zusatz eines oder mehrerer Oxyde der Erdalkalien, alsoz. B. Calciumoxyd, Magnesiumoxyd usw., beigemengt wird. Gibt man z. B. dem Calciumfluorid je nach seinem Versäuerungsgrad z. B. 1 % Calciumoxyd hinzu, so wird das im Schmelzfluß entstehende Siliciumtetrafluorid bereits im Entstehungszustand abgefangen und somit ein Zerspratzen des Aufdampfgutes bzw. Schwankungen im Vakuum vermieden. Bei Anwendung des erfindungsgemäßen Verfahrens lassen sich also in einfacher Weise die obengenannten Schwierigkeiten, ausschließen und unter Vermeidung von Ausschuß immer gleichmäßig gute Schichten erzeugen.Process for the production of reflection-changing surface layers on glass, transparent plastics or the like. It is known by vapor deposition of one or more thin layers of calcium fluoride, d or other fluorides the reflective properties of transparent materials such as glass, plastics and the like a. to change. Since the thickness of the layers is known to be determined according to Interference = conditions to be dimensioned often occur in the manufacture the layers required evaporation process, which is to be carried out in a vacuum, insofar Difficulties arise when the material to be vaporized during the vapor deposition process as a result of gas formation tattered. However, this results in a uniform and undisturbed formation of the layers not always guaranteed. So z. B. gaseous silicon tetrafluoride arise, that occurs during the thermal decomposition of silicofluoric acid salts (calcite silicofluoride), contained as an impurity in the evaporation materials. The gases produced emerge from the melt flow of the evaporation furnace and burn, so that the vaporized material will crack. The same cause are also due to fluctuations in the vacuum, which are also noticeable in a disturbing manner do. These disadvantages are addressed by the present] invention avoided by adding an additive measured according to its degree of acidification to the vaporized material one or more oxides of the alkaline earths, also z. B. calcium oxide, magnesium oxide etc., is added. Are you z. B. the calcium fluoride depending on its degree of acidification z. B. 1% calcium oxide is added, the resulting silicon tetrafluoride in the melt flow intercepted as soon as it is formed and thus the material being vaporized will crack or fluctuations in the vacuum are avoided. When using the method according to the invention the above-mentioned difficulties can thus be excluded in a simple manner and always produce uniformly good layers while avoiding rejects.

Claims (1)

PATENTANSPRUCH: Verfahren zum Verbessern von aus Calciumfluorid oder anderen Fluoriden bestehendem Aufdampfmaterial für die vakuumtechnische Herstellung von reflexändernden Oberflächenschichten auf Glas, durchsichtigen Kunststoffen od. dgl., dadurch gekennzeichnet, daß dem Aufdampfgut ein nach seinem Versäuerungsgrad bemessener Zusatz eines oder mehrerer Oxyde der Erdalkalien, also z. B. Calciumoxyd, Magnesiumoxyd usw., beigemengt wird. PATENT CLAIM: Process for improving vapor-deposition material consisting of calcium fluoride or other fluorides for the vacuum-technical production of reflective surface layers on glass, transparent plastics or the like z. B. calcium oxide, magnesium oxide, etc., is added.
DEO688D 1942-06-26 1942-06-26 Process for the production of reflection-changing surface layers on glass, transparent plastics or the like. Expired DE850786C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO688D DE850786C (en) 1942-06-26 1942-06-26 Process for the production of reflection-changing surface layers on glass, transparent plastics or the like.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO688D DE850786C (en) 1942-06-26 1942-06-26 Process for the production of reflection-changing surface layers on glass, transparent plastics or the like.

Publications (1)

Publication Number Publication Date
DE850786C true DE850786C (en) 1952-09-29

Family

ID=7349293

Family Applications (1)

Application Number Title Priority Date Filing Date
DEO688D Expired DE850786C (en) 1942-06-26 1942-06-26 Process for the production of reflection-changing surface layers on glass, transparent plastics or the like.

Country Status (1)

Country Link
DE (1) DE850786C (en)

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