DE643843C - 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
DE643843C
DE643843C DEG92479D DEG0092479D DE643843C DE 643843 C DE643843 C DE 643843C DE G92479 D DEG92479 D DE G92479D DE G0092479 D DEG0092479 D DE G0092479D DE 643843 C DE643843 C DE 643843C
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
DEG92479D
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 DE643843C publication Critical patent/DE643843C/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)
  • Luminescent Compositions (AREA)

Description

Verfahren zur Herstellung von Lumineszenzschirmen, insbesondere für Kathodenstrahlröhren Die Lichtabgabe von fluoreszierenden Schirmen in Kathodenstrahloszillographen, Kathodenstrahlferns-ehröhren 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 oscilloscopes, Cathode ray television tubes and similar devices 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 manufactured according to this process has a large 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 lumineszierende Stoff mit auf ihn chemisch nicht einwirkenden, bei Erhitzung auf nicht zu hohe Temperaturen leicht zu sublimierendem, gleichfalls fein zerkleinertem Kampfer vermischt wird.The essence of the invention is that the finely ground to be applied luminescent substance with chemically non-acting on it when heated not too high temperatures easily sublimated, also finely chopped Camphor is mixed.

Ein homogenes mechanisches Gemisch von lumineszierenden Stoffen und als Hilfsstoff dienendem Kampfer 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 suspendiertem 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 darauffo.lgende Erhitzung bis auf die Sublimierungstemperatur 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 herhalten. Als Flüssigkeiten, worin das Gemisch suspendiert wird, können Spiritus, Benzol, Benzin, Tetrachlorkohlenstoff, Chloroform, Aceton und andere ähnliche flüchtige Flüssigkeiten verwendet werden.A homogeneous mechanical mixture of luminescent substances and As an adjuvant camphor 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 material makes the screen see-through because of this process. part of its mass evaporates 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 you can easily use umbrellas with any degree of transparency. As liquids, in which the mixture is suspended, alcohol, benzene, gasoline, carbon tetrachloride, Chloroform, acetone, and other similar volatile liquids can be used.

Claims (1)

PATENTANSPRUCH: Verfahren- zur Herstellung von Lumines7enzschirmen, insbesondere für Kathodenstrahlröhren, dadurch gekennzeichnet, daß den fluoreszierenden Stof%n Kampfer zugesetzt wird und das Gemisch so lange und so stark erhitzt wird, daß der Leuchtschirm eine höhere Transparenz erhält.PATENT CLAIM: Process for the production of luminescent screens, in particular for cathode ray tubes, characterized in that the fluorescent Stof% n camphor is added and the mixture is heated so long and so strongly that that the luminescent screen has a higher transparency.
DEG92479D 1933-06-01 1933-11-19 Process for the production of luminescent screens, in particular for cathode ray tubes Expired DE643843C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU643843X 1933-06-01

Publications (1)

Publication Number Publication Date
DE643843C true DE643843C (en) 1937-04-19

Family

ID=21616293

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG92479D Expired DE643843C (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) DE643843C (en)

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