DE642846C - Process for the production of luminescent screens, in particular for cathode ray tubes - Google Patents

Process for the production of luminescent screens, in particular for cathode ray tubes

Info

Publication number
DE642846C
DE642846C DEG86880D DEG0086880D DE642846C DE 642846 C DE642846 C DE 642846C DE G86880 D DEG86880 D DE G86880D DE G0086880 D DEG0086880 D DE G0086880D DE 642846 C DE642846 C DE 642846C
Authority
DE
Germany
Prior art keywords
cathode ray
production
ray tubes
luminescent screens
luminescent
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
DEG86880D
Other languages
German (de)
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.)
GV OBJEDINENIJE ELEKTRO SLABOT
Original Assignee
GV OBJEDINENIJE ELEKTRO SLABOT
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 GV OBJEDINENIJE ELEKTRO SLABOT filed Critical GV OBJEDINENIJE ELEKTRO SLABOT
Application granted granted Critical
Publication of DE642846C publication Critical patent/DE642846C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Description

Verfahren zur Herstellung von Lumineszenzschirmen, insbesondere für Kathodenstrahlröhren Die Lichtabgabe von fluoreszierenden Schirmen in Kathodenstraßloszillographen, Kathodenstrahlfernsehröhren und ähnlichen Geräten hängt sehr wesentlich von der Durchsichtigkeit des fluoreszierenden Schirmes ab, der in den meisten Fällen durch den Glasboden des Apparates gebildet ist.Process for the production of luminescent screens, in particular for Cathode ray tubes The light output of fluorescent screens in cathode ray oscillographs, Cathode ray television tubes and similar equipment depends very much on the Transparency of the fluorescent screen, which in most cases is through the glass bottom of the apparatus is formed.

Die Erfindung bezieht sich auf ein Verfahren zum Auftragen von beliebigen fluoreszierenden Pulvern in Schichten beliebiger Stärke und beliebiger Durchsichtigkeit auf Glasflächen. Der nach diesem Verfahren verfertigte Schirm besitzt eine große mechanische Festigkeit, ist nicht hygroskopisch, kann leicht im Hochvakuum entgast werden und hat eine hohe Lichtabgabe.The invention relates to a method for applying any fluorescent powders in layers of any thickness and any transparency on glass surfaces. The screen made by this method has a large size mechanical strength, is not hygroscopic, can easily be degassed in a high vacuum and has a high light output.

Das Wesen der Erfindung besteht darin, daß der fein zerkleinerte aufzutragende Stoff mit auf ihn chemisch nicht einwirkendem, bei. Erhitzung auf nicht zu hohe Temperaturen leicht zu sublimierendem, gleichfalls fein zerkleinertem Ammoniumsalz, wie kohlensaurem Ammonium, vermischt wird.The essence of the invention is that the finely ground to be applied Substance that does not have any chemical effects on it. Heating to not too high Temperatures easily sublimated, also finely ground ammonium salt, such as carbonate of ammonium.

Ein homogenes mechanisches Gemisch von lunineszienenden Stoffen und als Hilfsstoff dienendem Ammoniumcarbonat wird in einer leicht verdampfenden Flüssigkeit (z. B. Alkohol), die keine Komponente des Gemisches auflöst, durchgerührt. Die Durchrührung kann am besten durch Zermahlen in einer Dampfmühle bewerkstelligt werden. Die erhaltene flüssige Masse mit suspendlertem Pulvergemisch wird auf die Glasfläche in einer gleichmäßigen Schicht aufgetragen und getrocknet. Die nach dem Trocknen am Glas haftende Schicht enthält sowohl den lumineszierenden Stoff als auch den Hilfsstoff. Die darauffolgende Erhitzung bis auf die Sublimieruungstemperatur des Hilfsstoffes macht den Schirm durchsichtig, da bei diesem Prozeß ein Teil seiner Masse verflüchtigt wird. Von dem Inhaltsverhältnis des lumineszierenden Stoffes und des Hilfsstoffes hängt der Durchsichtigkeitsgrad ab, und durch verschiedene Wahl dieses Verhältnisses kann man leicht Schirme mit beliebigem Durchsichtigkeitsgrad verhalten. Als Flüssigkeiten, worin das Gentisch suspendiert wird, kann Spiritus, Benzol, Benzin, TetrachlorkohlenstofF, Chloroform, Aceton !und andere ähnliche flüchtige Flüssigkeiten verwendet werden.A homogeneous mechanical mixture of luninescent substances and The auxiliary ammonium carbonate is in an easily evaporating liquid (e.g. alcohol) that does not dissolve any component of the mixture. The execution can best be done by grinding in a steam mill. The received liquid mass with suspended powder mixture is on the glass surface in a applied evenly and dried. After drying on the glass The adhesive layer contains both the luminescent substance and the auxiliary substance. The subsequent heating up to the sublimation temperature of the auxiliary makes the screen transparent, as part of its mass evaporates during this process will. On the content ratio of the luminescent substance and the auxiliary substance depends on the degree of transparency, and by various choices of this ratio one can easily behave screens with any degree of transparency. As liquids, in which the gene is suspended, alcohol, benzene, gasoline, carbon tetrachloride, Chloroform, acetone! And other similar volatile liquids can be used.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Lumineszenzschirmen, insbesondere für Kathod@@ strahlröhren, dadurch gekennzeichnet, den fluoreszierenden Stoffen ein Ammoniumsalz, wie kohlensaures Ammonium, zugesetzt wird und das Gemisch so lange und so stark erhitzt wird, bis der Leuchtschirm eine höhere Transparenz erhält.PATENT CLAIM: Process for the production of luminescent screens, especially for cathodic ray tubes, characterized by the fluorescent Substances an ammonium salt, such as carbonate of ammonium, is added and the mixture is heated so long and so strongly that the luminescent screen has a higher transparency receives.
DEG86880D 1933-06-01 1933-11-19 Process for the production of luminescent screens, in particular for cathode ray tubes Expired DE642846C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU642846X 1933-06-01

Publications (1)

Publication Number Publication Date
DE642846C true DE642846C (en) 1937-03-17

Family

ID=21616292

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG86880D Expired DE642846C (en) 1933-06-01 1933-11-19 Process for the production of luminescent screens, in particular for cathode ray tubes

Country Status (1)

Country Link
DE (1) DE642846C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647066A (en) * 1950-03-01 1953-07-28 Sylvania Electric Prod Phosphor suspension and method of applying

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647066A (en) * 1950-03-01 1953-07-28 Sylvania Electric Prod Phosphor suspension and method of applying

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