DE452222C - Glasses containing lead oxide for electrical insulation purposes - Google Patents

Glasses containing lead oxide for electrical insulation purposes

Info

Publication number
DE452222C
DE452222C DEP51035D DEP0051035D DE452222C DE 452222 C DE452222 C DE 452222C DE P51035 D DEP51035 D DE P51035D DE P0051035 D DEP0051035 D DE P0051035D DE 452222 C DE452222 C DE 452222C
Authority
DE
Germany
Prior art keywords
electrical insulation
lead oxide
containing lead
insulation purposes
glasses containing
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
DEP51035D
Other languages
German (de)
Inventor
Dr Georg Gehlhoff
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to DEP51035D priority Critical patent/DE452222C/en
Application granted granted Critical
Publication of DE452222C publication Critical patent/DE452222C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
    • H01B3/087—Chemical composition of glass
    • 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
    • C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/02—Constructional details

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Glass Compositions (AREA)

Description

Bleioxyd enthaltende Gläser für elektrische Isolierungszwecke. Die für elektrische Isolierungszwecke gewöhnlich verwendeten Bleigläser enthalten im allgemeinen außer Kieselsäure. Natriumoxyd und haliumoxvd einen mehr oder weniger hohen Prozentsatz an Bleioxvd. Der Gehalt an Bleioxyd wird unter dem Gesichtspunkt gewählt. daß das Glas bei der Verarbeitung. etwa in Glühlampen, leicht erweichbar sein soll. ohne den Alkaligehalt allzu hoch nehmen zu müssen, der das Isolierungsvermögen herabsetzt.Glasses containing lead oxide for electrical insulation purposes. the lead glasses commonly used for electrical insulation purposes are contained in the general except silica. Sodium oxide and halium oxide one more or less high percentage of lead oxide. The content of lead oxide is from the point of view chosen. that the glass in processing. for example in incandescent lamps, easily softened should be. without having to take the alkali content too high, which affects the insulating properties belittles.

Erfindungsgemäß wurde festgestellt, daß solche Gläser durch Zusatz von Kalk in ihrer elektrischen Eigenschaft erheblich verbessert «-erden, und zwar um so mehr, je höher der Zusatz ist. Allerdings wird hierdurch auch die Erweichungstemperatur des Glases erhöht. Will man dies vermeiden, so muß man sich mit entsprechend geringerem Zusatz begnügen. Dabei kommt jedoch die Tatsache zustatten, daß die ersten Prozentsätze von Kalk besonders günstig auf das Isolierungsv ermögen einwirken, während der Einfluß der nachfolgenden Prozente immer geringer wird. So vermindert ein Zusatz von etwa 21-2 ProzentKalk dasLeitvermögen, insbesondere auch bei höheren Temperaturen, je nach der Art des Glases auf die Hälfte bis zu einem Viertel, ohne die Erweichungstemperatur allzu erheblich heraufzusetzen.According to the invention it was found that such glasses by addition of lime considerably improved in their electrical properties "-erden, namely the more, the higher the addition. However, this also increases the softening temperature of the glass increased. If one wants to avoid this, one has to deal with accordingly less Suffice it to add. However, the fact that the first percentages of lime have a particularly favorable effect on the Isolierungsv, while the influence the following percent is getting smaller and smaller. So an addition of about 21-2 percent lime the conductivity, especially at higher temperatures, depending depending on the type of glass by half to a quarter, excluding the softening temperature too much to raise.

Besonders bei schlecht isolierenden Gläsern ist der genannte geringe Zusatz von Kalk von außerordentlicher Bedeutung.Particularly in the case of poorly insulating glasses, the aforementioned is low The addition of lime is extremely important.

Ein z. B. für Glühlampenzwecke geeignetes Glas erhält man etwa bei folgender Zusammensetzung Si02 62,o Gewichtsprozente, Na20 7,0 - KZ O 8,o - Pb0 2o,o - Ca0 3,0 - A z. B. glass suitable for incandescent lamp purposes is obtained approximately with the following composition Si02 62, o percent by weight, Na20 7.0 - KZ O 8, o - Pb0 2o, o - Ca0 3.0 -

Claims (1)

l@ATENTANSPRUCI3: Bleioxyd enthaltende Gläser für elektrische Isolierungszwecke, dadurch gekennzeichnet, daß das Glas mindestens 2 Prozent Calciumoxyd enthält.l @ ATENTANSPRUCI3: Glasses containing lead oxide for electrical insulation purposes, characterized in that the glass contains at least 2 percent calcium oxide.
DEP51035D 1925-08-01 1925-08-02 Glasses containing lead oxide for electrical insulation purposes Expired DE452222C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP51035D DE452222C (en) 1925-08-01 1925-08-02 Glasses containing lead oxide for electrical insulation purposes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE254175X 1925-08-01
DEP51035D DE452222C (en) 1925-08-01 1925-08-02 Glasses containing lead oxide for electrical insulation purposes

Publications (1)

Publication Number Publication Date
DE452222C true DE452222C (en) 1927-11-08

Family

ID=25769416

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP51035D Expired DE452222C (en) 1925-08-01 1925-08-02 Glasses containing lead oxide for electrical insulation purposes

Country Status (1)

Country Link
DE (1) DE452222C (en)

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