DE240085C - - Google Patents

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Publication number
DE240085C
DE240085C DENDAT240085D DE240085DA DE240085C DE 240085 C DE240085 C DE 240085C DE NDAT240085 D DENDAT240085 D DE NDAT240085D DE 240085D A DE240085D A DE 240085DA DE 240085 C DE240085 C DE 240085C
Authority
DE
Germany
Prior art keywords
glass
glasses
sodium
potassium
rubidium
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.)
Active
Application number
DENDAT240085D
Other languages
German (de)
Publication of DE240085C publication Critical patent/DE240085C/de
Active legal-status Critical Current

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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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/078—Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc

Claims (1)

KAISERLICHESIMPERIAL PATENTAMT.PATENT OFFICE. Das gewöhnliche Glas ist im wesentlichen Natrium-Calcium-Silikat. Es ist seit langem bekannt, daß Gläser, in welchen das Natrium durch Kalium ersetzt ist, die sogenannten KaIiglaser, sich durch gewisse wertvolle Eigenschaften auszeichnen. Dieselben werden z. B. wegen ihrer größeren Widerstandsfähigkeit gegen Hitze vielfach zur Herstellung wissenschaftlicher Apparate verwendet.The common glass is essentially sodium-calcium-silicate. It's been a long time known that glasses in which the sodium has been replaced by potassium, the so-called kale lasers, are characterized by certain valuable properties. The same are z. B. because of their greater resilience often used against heat in the manufacture of scientific apparatus. ίο Es wurde nun gefunden, daß auch die Kaligläser hierin noch übertroffen werden von Gläsern, welche Rubidium enthalten.ίο It has now been found that the potash glasses are also surpassed by Glasses containing rubidium. Beispielsweise wurden drei Glasproben hergestellt, deren Zusammensetzung durch die Formel M2O, CaO, 6SiO2 wiederzugeben ist. M bedeutet Natrium, Kalium, Rubidium. Die drei Gläser wurden dann auf ihre Schmelzbarkeit geprüft, indem beobachtet wurde, bei welcher Temperatur ein aus dem betreffenden Glase gefertigter Kegel vollständig zusammenschmolz. Es schmolz das Natriumglas bei etwa 800°, das Kaliumglas bei etwa 900.0, das Rubidiumglas erst oberhalb 10000. Das letztere ist also dem Kaliglas noch bedeutend überlegen.For example, three glass samples were produced, the composition of which is represented by the formula M 2 O, CaO, 6SiO 2 . M means sodium, potassium, rubidium. The three glasses were then tested for their fusibility by observing the temperature at which a cone made from the glass in question completely melted together. It melted the sodium glass at about 800 °, the potassium glass at about 900. 0, the Rubidiumglas only above 1,000 0th The latter is therefore still significantly superior to the potash glass. V Patent-Anspruch: ■V Patent claim: ■ Glas mit einem Gehalt an Rubidium.Glass containing rubidium.
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Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089525B (en) * 1958-04-23 1960-09-22 Corning Glass Works Alkali-lead-silicate glass with high specific electrical resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089525B (en) * 1958-04-23 1960-09-22 Corning Glass Works Alkali-lead-silicate glass with high specific electrical resistance

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