DE3505477A1 - Process for the preparation of a luminescent material, and use of a luminescent material of this type - Google Patents
Process for the preparation of a luminescent material, and use of a luminescent material of this typeInfo
- Publication number
- DE3505477A1 DE3505477A1 DE19853505477 DE3505477A DE3505477A1 DE 3505477 A1 DE3505477 A1 DE 3505477A1 DE 19853505477 DE19853505477 DE 19853505477 DE 3505477 A DE3505477 A DE 3505477A DE 3505477 A1 DE3505477 A1 DE 3505477A1
- Authority
- DE
- Germany
- Prior art keywords
- phosphor
- suspension
- luminescent material
- added
- water glass
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Luminescent Compositions (AREA)
Abstract
Description
Beschreibungdescription
Verfahren zum Herstellen eines Leuchtstoffes und Verwendung eines solchen Leuchtstoffes Die vorliegende Erfindung betrifft ein Verfahren nach dem Oberbegriff des Patentanspruchs 1 sowie die Verwendung eines nach diesem Verfahren hergestellten Leuchtstoffes.Method for producing a phosphor and using one such phosphor The present invention relates to a method according to the The preamble of claim 1 and the use of one according to this method manufactured phosphor.
Zur Herstellung von Leuchtschirmen hohen Auflösungsvermögens, insbesondere für Spezialröhren der Optoeloktronik, wie Oszillographenröhren und dgl., ist eine gute Rieselfähigkeit des Leuchtstoffes erwünscht. Durch die Verwendung von gut rieselfähigen Leuchtstoffen läßt sich die Gleichmäßigkeit der Leuchtstoffschicht wesentlich erhöhen.For the production of fluorescent screens with high resolution, in particular For special tubes in optoelectronics, such as oscilloscope tubes and the like, is one good flowability of the phosphor is desirable. By using good free-flowing Phosphors, the uniformity of the phosphor layer can be increased significantly.
Um andererseits eine hohe Leuchtdichte des Leuchtschirms zu ermöglichen, ist darauf zu achten, daß die die Rieselfähigkeit verbessernde Ummantelullg der Leuchtstoffkörner möglichst dünn aufgebracht ist und möglichst wenig Umlllantelungsnlaterial vorhanden ist.On the other hand, to enable a high luminance of the fluorescent screen, care must be taken that the Sheathing that improves flowability the phosphor grains are applied as thinly as possible and with as little coating material as possible is available.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, cin Verfahren der eingangs genannten Art anzugeben, das rieselfähige Leuchtstoffe herzustellen gestattet, nit denen Leuchtschirme sehr hohen Auflösungsvermögens, insbesondere nach dem Einreibeverfahren, herstellbar sind.The present invention is therefore based on the object of a method of the type mentioned at the outset to produce the free-flowing phosphors allowed, with which fluorescent screens have a very high resolution, in particular after the rub-in process, can be produced.
Diese Aufgabe wird durch die im Kennzeichen des Patent anspruches 1 angegebenen Merkmale gelöst.This task is due to the claim in the characterizing part of the patent 1 specified features solved.
Nach dem beschriebenen Verfahren hergestellte, mit SiO2 ummantelte Leuchtstoffe ergeben Leuchtschirme mit sehr großer Gleichmäßigkeit und hoher Leuchtdichte. Dies wird darauf zurückgeführt, daß die Ummantelung der Leuchtstoffkörner sehr dünn, sehr gleichmäßig und sehr haftfest ist.Manufactured according to the process described, coated with SiO2 Phosphors produce fluorescent screens with a very high degree of uniformity and high luminance. This is attributed to the fact that the coating of the phosphor grains is very thin, is very even and very adhesive.
Es gibt kaum Abrieb, der zu unterschiedlichen Kornabständen führen könnte.There is hardly any abrasion that leads to different grain spacing could.
Infolge der guten Rieselfähigkeit lassen sich Leuchtschirnie, insbesondere für Kathodenstrahlröhren, einfach nach dem Einreibeverfahren herstellen. Dieses Verfahren sieht bekanntlich vor, auf den Leuchtschirmträger, z. B. die Frontschale einer Spezialröhre, die eine Bildwandlerröhre oder eine Oszillographenröhre sein kann, zunächst eine dünne Kleber schicht auf zubringen und dann in diese Schicht den Leuchtstoff einzureiben. Bei Verwendung des beschriebenen ummantelten Leuchtstoffes erhält man Leuchtschirme höchster Gleichmäßigkeit, hoher Leuchtdichte und sehr hohen Auflösungsvermögens.As a result of the good flowability, Leuchtschirnie, in particular for cathode ray tubes, simply produced using the rub-in process. This The method is known to provide on the screen support, z. B. the front shell a special tube, which can be an image converter tube or an oscillograph tube can, first apply a thin layer of adhesive and then in this layer to rub the phosphor. When using the coated fluorescent material described you get fluorescent screens of the highest uniformity, high luminance and very high Resolving power.
Anhand des nachfolgend beschriebenen Ausführungsbeispiels wird die Erfindung näher erklärt.Using the exemplary embodiment described below, the Invention explained in more detail.
Der zu wnaiitelnde Leuchtstoff bzw. das zu ummantelnde Leuchtstoffgemisch wird zunächst mit Wasser und einem oberflächenaktiven Stoff zu einem Ultraschallbad gerührt.The luminescent material to be whitened or the luminescent material mixture to be encased first becomes an ultrasonic bath with water and a surface-active substance touched.
Dann wird unter Rühren und bei Ultraschallbehandlung Kal-iwasserglas in der erforderlichen Menge zugegeben und noch einige Zeit, z. B. etwa 10 min., gerührt. Dann wird ein Alkohol, insbesondere Isopropylalkohol, zugegeben.Potassium water glass is then added with stirring and with ultrasound treatment added in the required amount and for some time, e.g. B. about 10 min., touched. An alcohol, in particular isopropyl alcohol, is then added.
Nach einiger Zeit, z. B. 10 min., wird der Leuchtstoff mit Wasser, dann mit einer verdünnten organischen Säure, wie z. B. Citronensäure, dann mit Wasser und schließlich mit Alkohol, bevorzugt Isopropylalkohol, zur Verdrängung des Restwassers gewaschen und dann getrocknet. Nach dem Trocknen ist es ggf. ratsam, den Leuchtstoff zu sieben.After some time, e.g. B. 10 min., The phosphor is with water, then with a dilute organic acid, such as. B. citric acid, then with water and finally with alcohol, preferably isopropyl alcohol, to displace the residual water washed and then dried. After drying, it may be advisable to remove the fluorescent material to seven.
Die so erhaltene Ummantelung ist sehr haftfest und hydrophil. Die Abscheidungsgeschwindigkeit des SiO2 ist bis zu einem gewissen Grad durch die Zugabe des Alkohols steuerbar.The casing obtained in this way is very adhesive and hydrophilic. the Deposition rate of the SiO2 is to a certain extent due to the addition of alcohol controllable.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853505477 DE3505477A1 (en) | 1985-02-16 | 1985-02-16 | Process for the preparation of a luminescent material, and use of a luminescent material of this type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853505477 DE3505477A1 (en) | 1985-02-16 | 1985-02-16 | Process for the preparation of a luminescent material, and use of a luminescent material of this type |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3505477A1 true DE3505477A1 (en) | 1986-08-21 |
Family
ID=6262778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19853505477 Withdrawn DE3505477A1 (en) | 1985-02-16 | 1985-02-16 | Process for the preparation of a luminescent material, and use of a luminescent material of this type |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3505477A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3801771A1 (en) * | 1988-01-22 | 1989-07-27 | Philips Patentverwaltung | Method for producing a fluorescent screen |
NL9100056A (en) * | 1990-07-27 | 1992-02-17 | Samsung Electronic Devices | METHOD FOR TREATING THE SURFACE OF A FLUORESCENT MATERIAL |
DE19806213A1 (en) * | 1998-02-16 | 1999-08-26 | Tews | Compact energy saving lamp |
-
1985
- 1985-02-16 DE DE19853505477 patent/DE3505477A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3801771A1 (en) * | 1988-01-22 | 1989-07-27 | Philips Patentverwaltung | Method for producing a fluorescent screen |
NL9100056A (en) * | 1990-07-27 | 1992-02-17 | Samsung Electronic Devices | METHOD FOR TREATING THE SURFACE OF A FLUORESCENT MATERIAL |
DE19806213A1 (en) * | 1998-02-16 | 1999-08-26 | Tews | Compact energy saving lamp |
DE19806213B4 (en) * | 1998-02-16 | 2005-12-01 | Tews, Walter, Dipl.-Chem. Dr.rer.nat.habil. | Compact energy saving lamp |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8120 | Willingness to grant licences paragraph 23 | ||
8139 | Disposal/non-payment of the annual fee |