DE2613124A1 - GLASS FOR CATHODE RAY TUBES FOR THE REPLAY OF TELEVISION PICTURES - Google Patents

GLASS FOR CATHODE RAY TUBES FOR THE REPLAY OF TELEVISION PICTURES

Info

Publication number
DE2613124A1
DE2613124A1 DE19762613124 DE2613124A DE2613124A1 DE 2613124 A1 DE2613124 A1 DE 2613124A1 DE 19762613124 DE19762613124 DE 19762613124 DE 2613124 A DE2613124 A DE 2613124A DE 2613124 A1 DE2613124 A1 DE 2613124A1
Authority
DE
Germany
Prior art keywords
deep
glass
cathode ray
ray tubes
replay
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.)
Granted
Application number
DE19762613124
Other languages
German (de)
Other versions
DE2613124C2 (en
Inventor
Klaus Christian Van Erk
Marinus Ploeger
Peter Herman Von Reth
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE2613124A1 publication Critical patent/DE2613124A1/en
Application granted granted Critical
Publication of DE2613124C2 publication Critical patent/DE2613124C2/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
    • C03C3/076—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
    • 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
    • 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
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • 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
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • 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
    • C03C3/105—Glass compositions containing silica with 40% to 90% silica, by weight containing lead containing aluminium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/863—Vessels or containers characterised by the material thereof

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)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Description

Die Erfindung bezieht sich auf Glas für Kathodenstrahlröhren zur Wiedergabe von Fernsehbildern, insbesondere von Schwarz-Weiss-Bildern, und für das Frontglas der Röhre sowie für den konusförmigen Teil derselben.The invention relates to glass for cathode ray tubes for displaying television pictures, in particular black and white pictures, and for the front glass of the tube and for the conical part of the same.

Diesem Glas werden bestimmte Anforderungen in Bezug auf eine Anzahl physikalischer Eigenschaften im Zusammenhang mit der Formgebungs- und Verbindungstechnik der Teile der Röhre gestellt. Die Röhrenteile, d.h. das Frontglas und der Konus, werden durch Pressen und/oder Zentrifugieren hergestellt, während die Teile unter Verwendung von Erhitzung durch eine Flamme mit elektrischer Hilfserhitzung über das durch Erhitzung gut leitend gewordene Glas miteinander verschmolzen werden. Das Ausheizen von Gasen unter Evakuieren der Röhre bei erhöhter Temperatur soll nicht zur Verformung der Röhre führen.Certain requirements are placed on this glass in relation to a number of physical properties related to the technology used to shape and connect the parts of the tube. The tube parts, i.e. the front glass and the cone, are made by pressing and / or centrifugation, while the parts are fused together using heating by a flame with electrical auxiliary heating via the glass which has become highly conductive by heating. The heating of gases while evacuating the tube at an elevated temperature should not lead to deformation of the tube.

Dies hat zur Folge, dass der Viskositätsverlauf des Glases ziemlich genau festliegt. Die Erweichungstemperatur, d.h. die Temperatur, bei der die Viskosität des Glases 10[hoch]7,6 Poises beträgt, muss etwa 670 +/- 15°C betragen und die sogenannte "warme Länge", d.h. der Unterschied zwischen der Betriebstemperatur, bei der die Viskosität des Glases 10[hoch]4 Poises beträgt, und der Erweichungstemperatur, muss etwa 350 +/- 15°C sein.As a result, the viscosity curve of the glass is pretty much fixed. The softening temperature, ie the temperature at which the viscosity of the glass 10 [high] is 7.6 poises, must be about 670 +/- 15 ° C and the so-called "warm length", ie the difference between the operating temperature at which the viscosity of the glass is 10 [high] 4 poises, and the softening temperature must be around 350 +/- 15 ° C.

Eine andere wichtige Größe ist der spezifische elektrische Widerstand bei erhöhter Temperatur. Als Maß für diese Größe ist eine Temperatur gewählt, bei der der spezifische Widerstand kleines Rho gleich 100 M großes Omega.cm = 10[hoch]8 großes Omega.cm ist: T kleines Rho = 100 M großes Omega.cm. Diese Temperatur weist in der Regel einen Wert von 290 +/- 10°C auf.Another important variable is the specific electrical resistance at elevated temperature. A temperature is selected as a measure for this quantity, at which the specific resistance small Rho is equal to 100 M large Omega.cm = 10 [high] 8 large Omega.cm: T small Rho = 100 M large Omega.cm. This temperature usually has a value of 290 +/- 10 ° C.

Eine bisher übliche Glasart für Kolben von Bildröhren zur Wiedergabe von Schwarz-Weiss-Fernsehbildern weist die folgende Zusammensetzung (in Gew.%) auf:A previously common type of glass for flasks of picture tubes for the reproduction of black-and-white television pictures has the following composition (in% by weight):

Si0[tief]2 67,7 Ba0 13,6Si0 [deep] 2 67.7 Ba0 13.6

Na[tief]2 8,5 Al[tief]20[tief]3 2,5Na [deep] 2 8.5 Al [deep] 20 [deep] 3 2.5

K[tief]20 6,6 Sb[tief]20[tief]3 0,6K [deep] 20 6.6 Sb [deep] 20 [deep] 3 0.6

Li[tief]20 0,5.Li [deep] 20 0.5.

In den letzten Jahren sind die Preise einer Anzahl von Ausgangsmaterialien drastisch gestiegen. Zu den teuersten Ausgangsmaterialien zum Zusammensetzen des Gemenges für das obenstehende Glas gehören der Lepidolit, der Petalit oder das Spodumen, die das Li[tief]20 liefern, und die Pottasche, die das Ausgangsmaterial für das K[tief]20 bildet. Die Erfindung bezweckt, ein Glas zu schaffen, das ein billigeres Gemenge erfordert, ohne dass naturgemäß die Eigenschaften des Kolbens für eine Schwarz-Weiß-Bildwiedergaberöhre und die Bildwiedergaberöhre selbst beeinträchtigt werden und die Herstellung erschwert wird.In recent years the prices of a number of raw materials have increased dramatically. The most expensive starting materials for composing the mixture for the above glass include the lepidolite, petalite or spodumene, which provide the Li [deep] 20, and the potash, which forms the starting material for the K [deep] 20. The aim of the invention is to create a glass which requires a cheaper batch without naturally impairing the properties of the piston for a black-and-white display tube and the display tube itself and making production difficult.

Der Erfindung liegt die Erkenntnis zugrunde, dass keine Nachteile auftreten, wenn der T kleines Rho = 100 M großes Omega.cm-Wert bis 40°C niedriger als der bisher gebräuchliche Wert, d.h. gleich mindestens 240°C statt etwa 290°C, gewählt wird.The invention is based on the knowledge that there are no disadvantages if the T small Rho = 100 M large Omega.cm value up to 40 ° C lower than the previously used value, ie equal to at least 240 ° C instead of about 290 ° C, selected will.

Indem nun aus dem obenstehenden Glas das Li[tief]20 weggelassen und das Verhältnis Na[tief]20/K[tief]20 zugunsten des Na[tief]20 verschoben wird, wird ein Glas erhalten, das einen bis 40°C niedrigeren T kleines Rho = 100 M großes Omega.cm-Wert auf- weist, aber in bezug auf die obenstehenden viskosen Eigenschaften nahezu unverändert geblieben ist.By now omitting the Li [deep] 20 from the above glass and shifting the ratio Na [deep] 20 / K [deep] 20 in favor of the Na [deep] 20, a glass is obtained that has a T lower than 40 ° C small Rho = 100 M large Omega.cm value on- but has remained almost unchanged with regard to the above viscous properties.

Die Li[tief]20-freie Glaszusammensetzung nach der Erfindung ist dadurch gekennzeichnet, dass sie zwischen den folgenden Grenzen in Gew.% liegt:The Li [deep] 20-free glass composition according to the invention is characterized in that it lies between the following limits in% by weight:

Si0[tief]2 62 - 69Si0 [deep] 2 62 - 69

Na[tief]20 + K[tief]20 14 - 17Na [deep] 20 + K [deep] 20 14 - 17

1,4 < Na[tief]20/K[tief]20 < 2,21.4 <Na [deep] 20 / K [deep] 20 <2.2

Ba0 9 - 14Ba0 9-14

Sr0 0 - 2Sr0 0 - 2

Pb0 0 - 5Pb0 0 - 5

Al[tief]20[tief]3 1 - 4Al [deep] 20 [deep] 3 1 - 4

Sb[tief]20[tief]3 + As[tief]20[tief]3 0 - 0,8Sb [deep] 20 [deep] 3 + As [deep] 20 [deep] 3 0 - 0.8

F 0 - 1,5F 0-1.5

Zr0[tief]2 < 2.Zr0 [deep] 2 <2.

Beispielsweise werden nachstehend einige im Rahmen der Erfindung liegende Zusammensetzungen in Gew.%, die durch Schmelzen eines entsprechenden Gemenges erhalten werden, zusammen mit dem T kleines Rho = 100 M großes Omega.cm-Wert, der Erweichungstemperatur T[tief]E (kleines Eta = 10[hoch]7,6 Poises), der Arbeitstemperatur T[tief]A (kleines Eta = 10[hoch]4 Poises) und dem Verhältnis Na[tief]20/K[tief]20 gegeben.For example, some compositions within the scope of the invention are shown below in% by weight, which are obtained by melting a corresponding mixture, together with the T small Rho = 100 M large Omega.cm value, the softening temperature T [low] E (small Eta = 10 [high] 7.6 poises), the working temperature T [low] A (small Eta = 10 [high] 4 poises) and the ratio Na [low] 20 / K [low] 20.

1 2 3 4 51 2 3 4 5

Si0[tief]2 67,6 67,9 67,3 64,4 66,8Si0 [deep] 2 67.6 67.9 67.3 64.4 66.8

Na[tief]20 9,0 9,4 9,8 9,3 9,2Na [deep] 20 9.0 9.4 9.8 9.3 9.2

K[tief]20 6,4 5,9 5,6 5,0 5,9K [low] 20 6.4 5.9 5.6 5.0 5.9

Li[tief]20 - - - - -Li [deep] 20 - - - - -

Ba0 13,7 13,2 13,7 13,3 13,7Ba0 13.7 13.2 13.7 13.3 13.7

Zr0[tief]2 0 0,2 - - -Zr0 [deep] 2 0 0.2 - - -

Sr0 0,2 0,2 0,2 0,2 0,2Sr0 0.2 0.2 0.2 0.2 0.2

Pb0 - - - 3,7 -Pb0 - - - 3.7 -

Al[tief]20[tief]3 2,5 2,6 2,7 3,4 3,5Al [deep] 20 [deep] 3 2.5 2.6 2.7 3.4 3.5

Sb[tief]20[tief]3 0,6 0,6 0,7 0,7 0,7Sb [deep] 20 [deep] 3 0.6 0.6 0.7 0.7 0.7

F (% der Gesamtmenge) - - - - 0,35F (% of the total) - - - - 0.35

T kleines Rho = 100 M 265 255 255 260 260T small rho = 100 M 265 255 255 260 260

großes Omega.cmlarge Omega.cm

T[tief]E (°C) 668 677 677 671 681T [low] E (° C) 668 677 677 671 681

T[tief]A (°C) 1020 1027 1027 1028 1028T [low] A (° C) 1020 1027 1027 1028 1028

Na[tief]20/K[tief]20 1,40 1,6 1,75 1,86 1,59Na [deep] 20 / K [deep] 20 1.40 1.6 1.75 1.86 1.59

Claims (2)

1. Glas für Kathodenstrahlröhren zur Wiedergabe von Fernsehbildern, insbesondere Schwarz-Weiss-Bildern, dadurch gekennzeichnet, dass es frei von Li[tief]20 ist und eine Zusammensetzung innerhalb der folgenden Grenzen in Gew.% aufweist:1. Glass for cathode ray tubes for the reproduction of television pictures, in particular black and white pictures, characterized in that it is free of Li [deep] 20 and has a composition within the following limits in% by weight: Si0[tief]2 62 - 69 Al[tief]20[tief]3 1 - 4Si0 [deep] 2 62 - 69 Al [deep] 20 [deep] 3 1 - 4 Na[tief]20 + K[tief]20 14 - 17 Pb0 0 - 5Na [deep] 20 + K [deep] 20 14 - 17 Pb0 0 - 5 1,4< Na[tief]20/K[tief]20 < 2,2 Sb[tief]20[tief]3 + As[tief]20[tief]3 0-0,81.4 <Na [deep] 20 / K [deep] 20 <2.2 Sb [deep] 20 [deep] 3 + As [deep] 20 [deep] 3 0-0.8 Ba0 0 - 14 F 0-1,5Ba0 0-14 F 0-1.5 Sr0 0 - 2 Zr0[tief]2 < 2.Sr0 0 - 2 Zr0 [deep] 2 <2. 2. Kathodenstrahlröhre, von der mindestens ein Teil aus einem Glas nach Anspruch 1 besteht.2. Cathode ray tube, at least a part of which consists of a glass according to claim 1.
DE19762613124 1975-04-09 1976-03-27 Cathode ray tube glass for displaying television images Expired DE2613124C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7504202A NL7504202A (en) 1975-04-09 1975-04-09 GLASS FOR CATHOD BEAM TUBES FOR DISPLAY OF TELEVISION IMAGES.

Publications (2)

Publication Number Publication Date
DE2613124A1 true DE2613124A1 (en) 1976-10-14
DE2613124C2 DE2613124C2 (en) 1983-01-27

Family

ID=19823533

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762613124 Expired DE2613124C2 (en) 1975-04-09 1976-03-27 Cathode ray tube glass for displaying television images

Country Status (12)

Country Link
JP (1) JPS51123209A (en)
AT (1) AT345905B (en)
AU (1) AU498819B2 (en)
BE (1) BE840488A (en)
BR (1) BR7602162A (en)
CA (1) CA1051041A (en)
DE (1) DE2613124C2 (en)
ES (1) ES446781A1 (en)
FR (1) FR2306948A1 (en)
GB (1) GB1518875A (en)
IT (1) IT1058778B (en)
NL (1) NL7504202A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2822262A1 (en) * 1977-05-25 1978-11-23 Philips Nv CATHODE RAY TUBE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560870B1 (en) * 1984-03-09 1991-06-21 Corning Glass Works LOW LEAD OXIDE GLASSES USEFUL FOR THE PRODUCTION OF ELECTRICAL COMPONENTS

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE750252A (en) * 1969-05-13 1970-11-12 Philips Nv GLASS FOR CATHODIC RAY TUBES USED FOR THE REPRODUCTION OF TELEVISION IMAGES
BE757012A (en) * 1969-10-03 1971-04-02 Philips Nv GLASS FOR CATHODIC RAY TUBES USED FOR THE REPRODUCTION OF TELEVISION IMAGES

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2142491B2 (en) * 1971-08-25 1975-05-28 Fried. Krupp Gmbh, 4300 Essen Cooling tower
NL7203860A (en) * 1972-03-23 1973-09-25

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE750252A (en) * 1969-05-13 1970-11-12 Philips Nv GLASS FOR CATHODIC RAY TUBES USED FOR THE REPRODUCTION OF TELEVISION IMAGES
BE757012A (en) * 1969-10-03 1971-04-02 Philips Nv GLASS FOR CATHODIC RAY TUBES USED FOR THE REPRODUCTION OF TELEVISION IMAGES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2822262A1 (en) * 1977-05-25 1978-11-23 Philips Nv CATHODE RAY TUBE

Also Published As

Publication number Publication date
BE840488A (en) 1976-10-07
JPS5435213B2 (en) 1979-11-01
GB1518875A (en) 1978-07-26
BR7602162A (en) 1976-10-05
AU1284976A (en) 1977-10-13
DE2613124C2 (en) 1983-01-27
CA1051041A (en) 1979-03-20
NL7504202A (en) 1976-10-12
ATA246376A (en) 1978-02-15
AU498819B2 (en) 1979-03-29
AT345905B (en) 1978-10-10
IT1058778B (en) 1982-05-10
FR2306948A1 (en) 1976-11-05
ES446781A1 (en) 1977-10-01
JPS51123209A (en) 1976-10-27

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