DE942580C - High afterglow phosphor and method for making it - Google Patents

High afterglow phosphor and method for making it

Info

Publication number
DE942580C
DE942580C DEA19598A DEA0019598A DE942580C DE 942580 C DE942580 C DE 942580C DE A19598 A DEA19598 A DE A19598A DE A0019598 A DEA0019598 A DE A0019598A DE 942580 C DE942580 C DE 942580C
Authority
DE
Germany
Prior art keywords
red
making
phosphor
manganese
afterglow phosphor
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
DEA19598A
Other languages
German (de)
Inventor
Paul Stockenberg
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.)
Auergesellschaft GmbH
Original Assignee
Auergesellschaft 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 Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Priority to DEA19598A priority Critical patent/DE942580C/en
Application granted granted Critical
Publication of DE942580C publication Critical patent/DE942580C/en
Expired 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
    • C09K11/74—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth
    • C09K11/7485—Borates

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Description

Leuchtstoff mit starkem Nachleuchten und Verfahren zu seiner Herstellung Die Erfindung betrifft Leuchtstoffe auf der Basis des Cadmiumborats. Es ist bekannt, daß Cadmiumborate, die mit Mangan aktiviert sind, bei Erregung mit kurzwelligen ultravioletten Strahlen eine rote bis rotorange Fluoreszenz feigen.High afterglow phosphor and method of making it The invention relates to phosphors based on cadmium borate. It is known, that cadmium borates, which are activated with manganese, when excited with short-wave ultraviolet rays give a red to red-orange fluorescence.

Es wurde nun gefunden, daß Cadmiumborate, die neben Mangan noch Wismut als weiteren Aktivator enthalten, sowohl die gleiche Fluoreszenz als auch ein starkes Nachleuchten in der gleichen roten bis rotorange Farbe zeigen.It has now been found that cadmium borates, in addition to manganese, also contain bismuth contained as a further activator, both the same fluorescence and a strong one Show persistence of the same red to red-orange color.

Da Leuchtstoffe in @ Röhren verwendet werden, die infolge Spannungswechsel oft ein starkes Flimmern zeigen, ist der neugefundene Leuchtstoff bestens geeignet, in Mischung mit anderen den Rotanteil der Emission zu vergrößern, gleichzeitig aber auch den Stroboskopeffekt, der durch das Flimmern veranlaßt wird, herabzusetzen oder ganz auszuschalten.Since phosphors are used in tubes, the voltage changes often show a strong flicker, the newly found phosphor is ideally suited, to increase the red component of the emission in a mixture with others, but at the same time also reduce the strobe effect caused by the flickering or switch it off completely.

Das Verfahren zur Herstellung des nachleuchtenden Leuchtstoffes geht ähnlich dem des nicht nachleuchtenden, allein mit Mangan aktivierten Ca.dmiurnborat so vor sich, daß Stoffe größter Reinheit, die beim Glühen Cadmiumborat bilden, nach Mischen und. Zusetzen von Mangannitrat, Bismutylnitrat (Bi O N 03) und Ammonsulfat bei 75o bis 8oo° geglüht und in üblicher Weise zerkleinert werden. Beispiel 165 g Cadrniumcarbonat werden mit 6 cm3 Bismutylnitratlösung (q.5 g im Liter) verrieben und bei roo° getrocknet. Diesem Gemisch werden. 70,5 g Orthoborsäure und 45 cm3 Ammonsulfatlösung (25 g im Liter) und 7,2 cm3 Mangannitratlösung (8o g Mn im Liter) zugegeben. Dieses Gemisch wird bei zoo° getrocknet und in einer Kugelmühle (Porzellan) gemahlen. Dann wird bei 750 bis 780°-z Stunde lang in einer Porzellan- oder Quarzschale geglüht. Das Material wird fein zerrieben und nochmals -2 Stunden bei .76o bis 780° geglüht.The process for the production of the afterglowing phosphor is similar to that of the non-afterglowing calcium chloride activated with manganese alone so that substances of the greatest purity, which form cadmium borate when glowing, after mixing and. Adding manganese nitrate, bismuthyl nitrate (Bi ON 03) and ammonium sulphate can be calcined at 75o to 80o ° and crushed in the usual way. Example 165 g of cadrnium carbonate are triturated with 6 cm3 of bismuthyl nitrate solution (q.5 g per liter) and dried at roo °. This mixture will be. 70.5 g orthoboric acid and 45 cm3 ammonium sulfate solution (25 g per liter) and 7.2 cm3 manganese nitrate solution (80 g Mn per liter) were added. This mixture is dried at zoo ° and ground in a ball mill (porcelain). Then it is annealed at 750 to 780 ° -z hours in a porcelain or quartz bowl. The material is finely ground and annealed for another 2 hours at .76o to 780 °.

Claims (1)

PATENTANSPRÜCHE: z. Leuchtstoff mit starkem Nachleuchten im Gebiet von Rotorange bis Rot, bestehend aus mit Mangan und Wismut aktiviertem Cadmiumborat. 2: Verfahren zur Herstellung eines Leuchtstoffes nach Anspruch r, dadurch gekennzeichnet, daß Stoffe größter Reinheit; die beim Erhitzen Cadmiumborat bilden, nach Mischen und Zusetzen von Mangannitrat; Bismuthylnitrat und Ammonsulfat bei 750 bis goo° geglüht werden. PATENT CLAIMS: e.g. Phosphor with strong afterglow in the range from red-orange to red, consisting of cadmium borate activated with manganese and bismuth. 2: Process for the production of a phosphor according to claim r, characterized in that substances of the greatest purity; which form cadmium borate when heated, after mixing and adding manganese nitrate; Bismuthyl nitrate and ammonium sulfate are calcined at 750 to goo °.
DEA19598A 1954-01-30 1954-01-30 High afterglow phosphor and method for making it Expired DE942580C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA19598A DE942580C (en) 1954-01-30 1954-01-30 High afterglow phosphor and method for making it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA19598A DE942580C (en) 1954-01-30 1954-01-30 High afterglow phosphor and method for making it

Publications (1)

Publication Number Publication Date
DE942580C true DE942580C (en) 1956-05-03

Family

ID=6924480

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA19598A Expired DE942580C (en) 1954-01-30 1954-01-30 High afterglow phosphor and method for making it

Country Status (1)

Country Link
DE (1) DE942580C (en)

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