DE528394C - Process for the production of ultraviolet permeable glass - Google Patents
Process for the production of ultraviolet permeable glassInfo
- Publication number
- DE528394C DE528394C DED58794D DED0058794D DE528394C DE 528394 C DE528394 C DE 528394C DE D58794 D DED58794 D DE D58794D DE D0058794 D DED0058794 D DE D0058794D DE 528394 C DE528394 C DE 528394C
- Authority
- DE
- Germany
- Prior art keywords
- production
- glass
- tin
- permeable glass
- tin 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
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
Deutsche Spiegelglas Akt: Ges. in Grünenplan b. Alfeld, Leine Verfahren zur Herstellung von ultraviolettdurchlässigem Glas Bei der Herstellung von ultraviolettdurchlässigen Gläsern hat sich ergeben, daß eine erhöhte Ultraviolettdurchlässigkeit dadurch erzielt wird, daß dem Glasgemenge eine je nasch dem Eisengehalt des geschmolzenen Glases abgestufte Menge von Zinnehlorür zugesetzt wird. Bei der Ausführung des Verfahrens in der Praxis zeigen sich aber Nebenwirkungen, deren Vermeidung wünschenswert erscheint. So tritt, trotz der verhältnismäßig hohen Schmelztemperatur der Gläser, die den. Siedepunkt des Zirmchlorürs erheblich überschreitet, die erwartete Verflüchtigung des Zinnchlorürs nicht immer ein. Auch geht die Umsetzung des überschüssigen Chlorides mit den anderen Gemengebestandteilen sehr langsam vonstatten. Infolge dieser beiden Einflüsse tritt bei nicht ganz genauer Bemessung des Zinnchlorürzusatzes die Bildung von milchig getrübten Einschlüssen, sogenannten Knötchen, ein. Diese Nebenersrheinungen erschweren die Verbindung des an sich vortrefflich wirkenden Zinnchlorürs außerordentlich stark.German mirror glass act: Ges. In Grünenplan b. Alfeld, Leine method for the production of ultraviolet-permeable glass In the production of ultraviolet-permeable Glasses have been found to provide increased ultraviolet permeability is that the glass mixture one depending on the iron content of the molten glass Graduated amount of tin gum is added. When performing the procedure in practice, however, there are side effects which it seems desirable to avoid. So occurs, despite the relatively high melting temperature of the glasses that the. Boiling point of the Zirmchlorürs significantly exceeds the expected volatilization of tin chloride does not always occur. The implementation of the excess chloride also works proceed very slowly with the other ingredients of the batch. As a result of these two Influences, if the amount of tin chloride added is not exactly measured, the formation occurs of milky inclusions, so-called nodules. These side rivers make the connection of tin chloride, which in itself has an excellent effect, extremely difficult strong.
Durch weitere Versuche wurde nun gefunden, daß, unbeschadet der Herheiführung der erwünschten Ultraviolettdurchlässigkeit,' ein Zusatz von Zinnoxydul oder Zinnhydroxydul die geschilderten Nebenwirkungen nicht zeigt. Es ist beim Zinnoxydul möglich; einen erheblichen überschuß des Reagenzes zu verwenden, ohne daß die Steinehenbildung auftritt. Der verwendete überschuß führt zu keiner Trübung des Glases und bringt die außerordentlich wichtige Wirkung hervor, das etwa vorhandene Eisenoxydul in starker Bestrahlung vor Oxydation zu schützen. Auch gegenüber allen anderen Reduktionsmitteln, wie, Kohle, kohlenbaltigen Substanzen und fein verteilten Metallen, hat sich die Verwendung von Zinnoxydul als überlegen gezeigt, da alle genannten Reduktionsmittel, in zu hoher Konzentration verwandt, zu Verfärbungen des Glases führen. Vorteil bringt das Zinnoxydul auch deshalb, weil es in alkalischer Lösung verwandt und in solcher Lösung bei rascher Arbeit ohne wesentliche Oxydation ganz gleichmäßig im Gemenge verteilt werden kann. Solche Lösungen können durch Auflösung vorn fertigem Zinnoxydul, wie auch durch Versetzen von Zinnchlorür mit überschüssiger Alkalilauge hergestellt werden.Through further experiments it has now been found that, without prejudice to the induction the desired ultraviolet permeability, an addition of tin oxide or tin hydroxide does not show the described side effects. It is possible with tin oxide; a to use a considerable excess of the reagent without the formation of stones occurs. The excess used leads to no clouding of the glass and brings the extraordinarily important effect of any iron oxide present in to protect against strong irradiation from oxidation. Also to all other reducing agents, like, coal, carbonaceous substances and finely divided metals, the has become Use of tin oxide has been shown to be superior, since all of the reducing agents mentioned, used in too high a concentration, lead to discoloration of the glass. Brings advantage the tin oxide also because it is related in alkaline solution and in such Solution in the case of rapid work without substantial oxidation quite evenly in the mixture can be distributed. Such solutions can be obtained by dissolving the finished tin oxide, as well as by mixing tin chloride with excess alkali lye will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED58794D DE528394C (en) | 1929-07-09 | 1929-07-09 | Process for the production of ultraviolet permeable glass |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED58794D DE528394C (en) | 1929-07-09 | 1929-07-09 | Process for the production of ultraviolet permeable glass |
Publications (1)
Publication Number | Publication Date |
---|---|
DE528394C true DE528394C (en) | 1931-06-27 |
Family
ID=7057532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED58794D Expired DE528394C (en) | 1929-07-09 | 1929-07-09 | Process for the production of ultraviolet permeable glass |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE528394C (en) |
-
1929
- 1929-07-09 DE DED58794D patent/DE528394C/en not_active Expired
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