DE654925C - Phosphate glasses for parts of glass exposed to attack by liquid or vaporous alkali or other light metals, especially metal vapor lamps - Google Patents

Phosphate glasses for parts of glass exposed to attack by liquid or vaporous alkali or other light metals, especially metal vapor lamps

Info

Publication number
DE654925C
DE654925C DEI53034D DEI0053034D DE654925C DE 654925 C DE654925 C DE 654925C DE I53034 D DEI53034 D DE I53034D DE I0053034 D DEI0053034 D DE I0053034D DE 654925 C DE654925 C DE 654925C
Authority
DE
Germany
Prior art keywords
attack
liquid
parts
metal vapor
light metals
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
DEI53034D
Other languages
German (de)
Inventor
Dr Hans Georg Grimm
Dr Paul Huppert
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI53034D priority Critical patent/DE654925C/en
Priority claimed from GB2447035A external-priority patent/GB461570A/en
Application granted granted Critical
Publication of DE654925C publication Critical patent/DE654925C/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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/302—Vessels; Containers characterised by the material of the vessel

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

Phosphatgläser für dem Angriff von flüssigen oder dampfförmigen Alkali- oder anderen Leichtmetallen ausgesetzte Glasteile, insbesondere von Metalldampflampen Für Geräteoder Apparate, welche dem Angriff von flüssigen oder dampfförmigen Alkali-, Leichtmetallen usw. ausgesetzte Glasteile enthalten, insbesondere Leuchtröhren mit Alkalimetalldampffüllungoder andere Entladungsröhren mit zerstäubenden Leichtmetallelektroden, war bisher kein Werkstoff bekannt, der, zur Herstellung dieser Teile verwandt, längere Zeit dem Angriff der lUetalle oder deren Dämpfen standgehalten hätte. Es ist zwar schon vorgeschlagen worden, zur Vermeidung dieses Nachteils die Kieselsäure der Gläser weitgehend durch Borsäure zu ersetzen, hoch biorsäurehaltige Gläser haben jedoch den Nachteil, d,aßsiegegen Feuchtigkeit und Atmosphärilien wenig widerstandsfähig sind. Man mußte deshalb zu dem Notbehelf greifen, sie zu ihrem Schutze mit anderen widerstandsfähigen Gläsern zu ummanteln oder zu überfangen.Phosphate glasses for attack by liquid or vaporous alkali or glass parts exposed to other light metals, especially metal vapor lamps For devices or apparatus that are exposed to attack by liquid or vaporous alkali, Contain glass parts exposed to light metals, etc., especially fluorescent tubes Alkali metal vapor filling or other discharge tubes with atomizing light metal electrodes, So far, no material was known that was used for the production of these parts, longer Time would have withstood the attack of the metals or their vapors. It is true has already been proposed to avoid this disadvantage, the silica the To replace glasses largely with boric acid, glasses have a high content of boric acid however, the disadvantage is that they are not very resistant to moisture and atmospheres are. One had to resort to the makeshift solution, she and others for her protection to coat or overlay resistant glasses.

Als gut geeignet wurden solche Phosphat-2,1 C, befunden, die einen über das MolverhältnisA1203 :P.05 - i : i hinausgehenden Überschuß an Aluminiumoxyd bis zu 30 oiö des Glasgewichtes enthalten. Neben der Widerstandsfähigkeit gegen die Einwirkung von geschmolzenen oder dampfförmigen Alkali-, Leichtmetallen ia. d.gl. besitzen sie eine hohe Wasserbeständigkeit sowie eine sehr gute Lichtdurchlässigkeit, so daß z. B. Leuchtröhren, welche im wesentlichen sichtbares Licht aussenden und bei denen die durchsichtigen Teile dem Angriff von geschmolzenen oder dampfförmigen Alkali-. Leichtmetallen usw. ausgesetzt sind, aus den genannten Gläsern hergestellt werden können. So sind diese Gläser sehr geeignet als Werkstoff= für die lichtdurchlässigen Teile von Natriumdampflampen, welche neuerdings für die blendungsfreie Beleuchtung von Verkehrswegen von Bedeutung sind. In diesen und ähnlichen Fällen, in denen es nicht auf die Durchlässigkeit der Gläser für Ultraviolett ankommt oder solche sogar unerwünscht wäre. brauchen die benutzten Rohstoffe nicht frei von Eisen, Titan und anderen die Ultraviolettdürchlässigkeit störenden Bestandteilen zu sein, man kann also mit sehr billigen Rohstoffen auskommen.Phosphate-2.1 C, which have been found to be very suitable excess of aluminum oxide exceeding the molar ratio A1203: P.05 - i: i contain up to 30% of the weight of the glass. In addition to being resistant to the action of molten or vaporous alkali metals, light metals, etc. the like they have high water resistance and very good light transmission, so that z. B. fluorescent tubes which emit and essentially visible light in which the transparent parts are subject to attack by molten or vaporous Alkali-. Light metals, etc. are exposed, made from the glasses mentioned can be. So these glasses are very suitable as a material = for the translucent Parts of sodium vapor lamps, which have recently been used for glare-free lighting of traffic routes are important. In these and similar cases where there is does not depend on the permeability of the glasses for ultraviolet or even such would be undesirable. do not need the raw materials used free of iron, titanium and other constituents interfering with ultraviolet permeability, one can So get by with very cheap raw materials.

Besonders bewährt haben sich Gläser folgender Zusammensetzung:- K, 0 Na. 0 Ca0 Ba0 Mg0 Si 0., A1203 B20;, 1'2O; A 9,0 - 4,5 ?7,2 -- 9,o 24,6 9,7 16,o B -- 10,0 - 10,0 10,0 5,o 31.3 25,0 8,7 C - --- 10,0 13,0 10,0 31,3 20,0 15,7 D - -- - 10,0 10,0 20,0 Q6,3 Q5,0 8,7 E 3,0 - -- 10,0 5,0 20,0 -28,3 25,0 8,7 Glasses of the following composition have proven particularly useful: - K, 0 Na. 0 Ca0 Ba0 Mg0 Si 0., A1203 B20 ;, 1'2O; A 9.0 - 4.5 ? 7.2 - 9, o 24.6 9.7 16, o B - 1 0 , 0 - 10, 0 1 0 , 0 5, o 31.3 25.0 8.7 C - --- 1 0 , 0 13.0 10.0 3 1 , 3 20.0 15.7 D - - - 10.0 10.0 20.0 Q6.3 Q5.0 8.7 E 3.0 - - 10.0 5.0 20 0 28.3 25 0 8.7

Claims (1)

PATENTANSPRÜCHE: -i. Phosphatgläser, die neben den in gewöhnlichen Gläsern vorhandenen Stoffen Aluminiumoxyd und Phosphorpentoxyd als, wesentliche Bestandteile enthalten, für dem Angriff von flüssigen oder dampfföimigeri' Alkali- oder anderen Leichtmetallen ausgesetzte Glasteile, insbesondere in Metall.-dampflampen, welche keine wesentliche Menge Ultraviolett aussenden, dadurch gekennzeichnet, daß der Gehalt an Aluminiumoxyd größer ist, als dem Molver- altnis von Al. 03 : P20;; = i : i ent- richt, zweckmäßig bis zu einem über- tchuß an Aluminiumoxyd von 30 0io des Glasgewichtes.
z. Phosphatgläser gemäß Anspruch i, dadurch gekennzeichnet, daß sie einen Gehalt an Borsäure besitzen.PATENT CLAIMS: -i. Phosphate glasses, which in addition to the substances found in ordinary glasses contain aluminum oxide and phosphorus pentoxide as "essential components", and therefore glass parts exposed to attack by liquid or vapor-free alkali or other light metals, especially in metal vapor lamps, which do not emit any significant amount of ultraviolet characterized in that the content of aluminum oxide is greater than the molar altnis of Al. 03 : P20 ;; = i: i develop correct, expedient up to an over- An amount of aluminum oxide of 30 0io des Glass weight.
z. Phosphate glasses according to claim i, characterized in that they contain boric acid.
DEI53034D 1935-08-17 1935-08-17 Phosphate glasses for parts of glass exposed to attack by liquid or vaporous alkali or other light metals, especially metal vapor lamps Expired DE654925C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI53034D DE654925C (en) 1935-08-17 1935-08-17 Phosphate glasses for parts of glass exposed to attack by liquid or vaporous alkali or other light metals, especially metal vapor lamps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEI53034D DE654925C (en) 1935-08-17 1935-08-17 Phosphate glasses for parts of glass exposed to attack by liquid or vaporous alkali or other light metals, especially metal vapor lamps
GB2447035A GB461570A (en) 1935-09-02 1935-09-02 Improvements in the manufacture and production of the transparent parts of metal vapour lamps and the like

Publications (1)

Publication Number Publication Date
DE654925C true DE654925C (en) 1938-01-04

Family

ID=25981887

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI53034D Expired DE654925C (en) 1935-08-17 1935-08-17 Phosphate glasses for parts of glass exposed to attack by liquid or vaporous alkali or other light metals, especially metal vapor lamps

Country Status (1)

Country Link
DE (1) DE654925C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2707894A1 (en) * 1977-02-24 1978-08-31 Kosmedico Vertrieb Kosmetische UV-lamp with narrow emission spectrum - esp. for the treatment of psoriasis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2707894A1 (en) * 1977-02-24 1978-08-31 Kosmedico Vertrieb Kosmetische UV-lamp with narrow emission spectrum - esp. for the treatment of psoriasis

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