DE2829877A1 - Colouring red-emitting phosphor with cadmium sulphide selenide - by chemical pptn. on surface of phosphor particles and heating - Google Patents

Colouring red-emitting phosphor with cadmium sulphide selenide - by chemical pptn. on surface of phosphor particles and heating

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Publication number
DE2829877A1
DE2829877A1 DE19782829877 DE2829877A DE2829877A1 DE 2829877 A1 DE2829877 A1 DE 2829877A1 DE 19782829877 DE19782829877 DE 19782829877 DE 2829877 A DE2829877 A DE 2829877A DE 2829877 A1 DE2829877 A1 DE 2829877A1
Authority
DE
Germany
Prior art keywords
heating
phosphor
red
pigments
cadmium
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Withdrawn
Application number
DE19782829877
Other languages
German (de)
Inventor
Gerhard Kroenes
Otto Marzel
Hermann Dr Rer Nat Widmann
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19782829877 priority Critical patent/DE2829877A1/en
Priority to ES482290A priority patent/ES482290A1/en
Publication of DE2829877A1 publication Critical patent/DE2829877A1/en
Withdrawn legal-status Critical Current

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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
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
    • C09K11/881—Chalcogenides
    • C09K11/883—Chalcogenides with zinc or cadmium
    • 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

Abstract

Prodn. of a phosphor (I) coloured with Cd(SSe) pigment (II) is effected by depositing >=1 (II) component on the surface of the (I) particles by chemical pptn., followed by heating. Process is simple and suitable for mass prodn. The (II) deposited adheres well and is highly stable. The prods. are specified for use in the mfr. of colour-picture tube screens with red-emitting (lanthanide oxide or oxysulphide) phosphors.

Description

Beschreibungdescription

Verfahren zum Herstellen eines eingefärbten Leuchtstoffes Die vorliegende Erfindung betrifft ein Verfahren zum Herstellen eines mit Cadmiumsulfoselenid-Pigmenten eingefärbten Leuchtstoffes durch Anlagern der Pigmente an der Oberfläche der Leuchtstoffteilchen.Method of making a colored phosphor The present invention The invention relates to a method for producing one with cadmium sulfoselenide pigments colored luminescent material by depositing the pigments on the surface of the luminescent particles.

Zur Erhöhung des Kontrastes von Leuchtschirmen für Farbbildkathodenstrahlröhren ist es bereits bekannt, die einzelnen Leuchtstoffteilchen mit Farbpigmenten der Emissionsfarbe des betreffenden Leuchtstoffes zu ummanteln. (US-PS 28 75 449, DE-OS 14 37 250) In Anbetracht der vielfältigen Verfahrensvorgänge, denen die Leuchtstoffe bei der Herstellung der Leuchtschirme für Farbbildkathodenstrahlröhren unterworfen werden, werden an die Haftfestigkeit und Beständigkeit der Pigment anlagerung große Anforderungen gestellt.To increase the contrast of fluorescent screens for color cathode ray tubes it is already known that the individual phosphor particles with color pigments To coat emission color of the relevant phosphor. (US-PS 28 75 449, DE-OS 14 37 250) In view of the many processes involved in the phosphors subjected to the manufacture of fluorescent screens for color cathode ray tubes become, the adhesive strength and durability of the pigment attachment will be great Requirements.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein in der Nassenherstellung einfach zu handhabendes Verfahren anzugeben, das gut haftende und hochbeständige Pigmentanlageru eee sewrzustellen gestattet.The present invention is based on the object in the Wet production to specify an easy-to-use process, the It is permitted to produce well-adhering and highly stable pigment deposits.

Gemäß der -Erfindung wird vorgeschlagen, daß die Anlagerung der Pigmente durch chemisches Ausfällen wenigstens eines Pigmentbestandteil es und nachfolgendes Erhitzen vorgenommen wird.According to the invention it is proposed that the addition of the pigments by chemical precipitation of at least one pigment component and the following Heating is carried out.

Die gemaß dem beschriebenen Verfahren hergestellten pigmentierton Leuchtstoffe sind problemlos zu verarbeiten.The pigmented clay produced according to the process described Phosphors can be processed without any problems.

Anhand des nachfolgend beschriebenen bevorzugten Ausführungsbeispiels wird die Erfindung nachfolgend näher erläutert.Using the preferred exemplary embodiment described below the invention is explained in more detail below.

Zunächst wird einer wässerigen Leuchtstoffsuspension eine Cd-Salz-Lösung zugegeben. Dann wird das Cadmium als Cadmiumsulfid mit einer Thioacetamid-Lösung auf die Leuchtstoffoberfläche gefällt.First, an aqueous phosphor suspension becomes a Cd salt solution admitted. Then the cadmium is used as cadmium sulfide with a thioacetamide solution fell on the fluorescent surface.

Der mit Cadmiumsulfid ummantelte Leuchtstoff wird dann abfiltriert und in dem Wasser wieder homogenisiert. Der wässerigen Leuchtstoff-Cadmiumsulfidsuspension gibt man dann eine wässerige Selenit-Lösung zu. Dann wird z. B. mit verdünnter Salzsäure angesäuert und unter starkem Rühren durch Zugabe einer Thioharnstofflösung rotes Selen auf das mit Cadmiumsulfid ummantelte Leuchtstoffkorn ausgefällt.The phosphor coated with cadmium sulfide is then filtered off and homogenized again in the water. The aqueous phosphor cadmium sulfide suspension an aqueous selenite solution is then added. Then z. B. with dilute hydrochloric acid acidified and red by adding a thiourea solution while stirring vigorously Selenium precipitated on the cadmium sulfide coated phosphor grain.

Der so präparierte Leuchtstoff wird nunmehr abfiltriert mit demineralisiertem Wasser gewaschen, mit Alkohol,- vorzugsweise Ißopropylalkohol nachgewaschen, und bei Temperaturen zwischen 50 und 3000 cc vorzugsweise bei 2000 C getrocknet. Anschließend wird in einer Inertgasatmosphäre bei Temperaturen zwischen 200 und 10000 C, vorzugsweise etwa 7500 C über eine Zeit von 10 bis 200 Minuten, vorzugsweise etwa 60 Minuten geglüht. Zusätze an Schmelzmitteln erleichtern die Bildung des Cadmiumsulfoselenids; sie müssen aber bei einem nachfolgenden Verfahrensachritt wieder entfernt werden.The phosphor prepared in this way is then filtered off with demineralized Washed with water, washed with alcohol, - preferably isopropyl alcohol, and dried at temperatures between 50 and 3000 cc, preferably at 2000 C. Afterward is in an inert gas atmosphere at temperatures between 200 and 10,000 C, preferably about 7500 C over a period of 10 to 200 minutes, preferably about 60 minutes annealed. Additions of fluxes facilitate the formation of the cadmium sulfoselenide; however, they must be removed again in a subsequent procedural step.

Claims (7)

Patentansprüche 1. Verfahren zum Herstellen eines mit Cadmiumsulfoselenid-Pigmenten eingefärbten Leuchtstoffes durch Anlagern der Pigmente an der Oberfläche der Leuchtstoffteilchen, dadurch gekennzeichnet, daß die Anlagerung der Pigmente durch chemisches Ausfällen wenigstens eines Pigmentbestandteiles und nachfolgendes Erhitzen vorgenommen wird.Claims 1. A method for producing one with cadmium sulfoselenide pigments colored luminescent material by depositing the pigments on the surface of the luminescent particles, characterized in that the pigments are added by chemical precipitation at least one pigment component and subsequent heating is carried out. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf den Leuchtstoffteilchen zunächst Cadmiumsulfid abgelagert wird, dann Selen auf die Cadmiumsulfidablagerung ausgefällt wird und dann durch Erhitzen die Cadmiumsulfoselenideinfärbung hergestellt wird.2. The method according to claim 1, characterized in that on the Fluorescent particles first deposit cadmium sulfide, then selenium on top of the cadmium sulfide deposit is precipitated and then produced by heating the cadmium sulfoselenide color will. oder Anspruch 2 3. Verfahren nach Anspruch 4Vdadurch gekennzeichnet, daß das Erhitzen bei Temperaturen von 2000 C bis 10000 C, vorzugsweise 5000 C bis 9000 C, insbesondere etwa 7500 C vorgenommen wird.or claim 2 3. The method according to claim 4V, characterized in that that the heating at temperatures of 2000 C to 10000 C, preferably 5000 C to 9000 C, in particular about 7500 C is made. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Erhitzen in einer Inertgasatmosphäre vorgenommen wird.4. The method according to any one of claims 1 to 3, characterized in that that the heating is carried out in an inert gas atmosphere. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Erhitzen über einen Zeitraum von 10 bis 200 Minuten, vorzugsweise 45 bis 90 Minuten, insbesondere etwa 60 Minuten vorgenommen wird.5. The method according to any one of claims 1 to 4, characterized in that that heating for a period of 10 to 200 minutes, preferably 45 to 90 minutes, in particular about 60 minutes. 6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Cadmiumsulfidanlagerung durch chemisches Ausfällen erfolgt.6. The method according to any one of claims 1 to 5, characterized in that that the cadmium sulfide deposition takes place through chemical precipitation. 7. Verfahren nach einem der Ansprüche 1 bis 6, gekenzeichnt durch die Anwendung bei der Herstellung eines mit Rotpigmenten ummantelten rot emittierenden Leuchtsstoffes, insbesondere eines Seltenerd-Metalloxyd- oder Metalloxysulfid-Leuchtstoffes für Leuchtschirme von Farbbildkathodenstrahlröhren.7. The method according to any one of claims 1 to 6, marked by the application in the production of a red-emitting encased with red pigments Phosphor, in particular a rare earth metal oxide or metal oxysulfide phosphor for fluorescent screens of color cathode ray tubes.
DE19782829877 1978-07-07 1978-07-07 Colouring red-emitting phosphor with cadmium sulphide selenide - by chemical pptn. on surface of phosphor particles and heating Withdrawn DE2829877A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19782829877 DE2829877A1 (en) 1978-07-07 1978-07-07 Colouring red-emitting phosphor with cadmium sulphide selenide - by chemical pptn. on surface of phosphor particles and heating
ES482290A ES482290A1 (en) 1978-07-07 1979-07-06 Procedure for the manufacture of pass-through water-riding and fire-resistant drives for the passing of cables. (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782829877 DE2829877A1 (en) 1978-07-07 1978-07-07 Colouring red-emitting phosphor with cadmium sulphide selenide - by chemical pptn. on surface of phosphor particles and heating

Publications (1)

Publication Number Publication Date
DE2829877A1 true DE2829877A1 (en) 1980-01-17

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Family Applications (1)

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DE19782829877 Withdrawn DE2829877A1 (en) 1978-07-07 1978-07-07 Colouring red-emitting phosphor with cadmium sulphide selenide - by chemical pptn. on surface of phosphor particles and heating

Country Status (1)

Country Link
DE (1) DE2829877A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012055A1 (en) * 1980-03-28 1981-10-08 Videocolor GmbH, 7900 Ulm Pigmenting phosphor particles by wet process with calcination - in air to increase adhesion and impart hydrophilic nature, useful in colour picture tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012055A1 (en) * 1980-03-28 1981-10-08 Videocolor GmbH, 7900 Ulm Pigmenting phosphor particles by wet process with calcination - in air to increase adhesion and impart hydrophilic nature, useful in colour picture tube

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