Use of Rare Earths in Television and Cathode Ray Phosphors

McColl, James R.; Palilla, Frank C.

doi:10.1021/bk-1981-0164.ch010

Cited by 16 publications

(7 citation statements)

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“…etc. [6][7][8], a particularly eco-friendly and efficient process for recycling of rare earth resources from the "urban mine" has been encouraged and anticipated [9].…”

Section: Introductionmentioning

confidence: 99%

Extraction and Separation of Rare Earth Metal Ions with DODGAA in Ionic liquids

Yang

Baba

Kubota

et al. 2012

SERDJ

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In order to apply ionic liquids (ILs) to the separation of rare earth metals, liquid-liquid extraction of a series of rare earth elements into the ILs was investigated mainly using 1-octyl-3-methylimidazolium bis(trifluoromethyl sulfonyl) imide, [C 8 mim][Tf 2 N], withN,N-dioctyldiglycol amic acid (DODGAA) as the extractant. A higher selectivity was exhibited for the heavier rare earth elements as in the n-dodecane system, and the order of the extractability of Y(III) in the IL system, situated in the heavy rare earth metals, was between Tb and Dy. This position is a little different from that for the common solvent extraction system employing organophosphorus extractants such as bis (2-ethylhexyl)phosphoric acid (D2EHPA) and 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (PC-88A). Quantitative extraction was achieved for all rare earth metals with DODGAA from sulfuric acid solutions from pH 1.5 to 4. It was confirmed that rare earth metal ions were extracted with 3 DODGAA molecules in the ILs.

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“…etc. [6][7][8], a particularly eco-friendly and efficient process for recycling of rare earth resources from the "urban mine" has been encouraged and anticipated [9].…”

Section: Introductionmentioning

confidence: 99%

Extraction and Separation of Rare Earth Metal Ions with DODGAA in Ionic liquids

Yang

Baba

Kubota

et al. 2012

SERDJ

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“…As a result of its special fluorescent properties, europium is a desirable component in several types of solid-state materials with important practical applications ranging from television picture tubes to light bulb filaments. 1 The europium-containing materials are typically made by mixing a small amount of a europium salt with a less expensive matrix and processing the mixture to the final product. An alternative route to solid-state materials which is potentially more efficient and offers the possibility of more homogeneous products involves the use of molecular precursors containing the component metals.…”

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confidence: 99%

Substituent effects in the formation of aryloxide-bridged europium complexes

Evans¹,

Greci²,

Ziller³

1997

J. Chem. Soc., Dalton Trans.

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The reactivity of europium in liquid ammonia with 2,6-disubstituted phenols has been surveyed and the effect of the 2,6 substituents on the bridging ability of the aryloxides has been examined. Monomeric and tetrameric complexes of Eu II have been isolated with tert-butyl and isopropyl substituents, Eu(OC 6) 2 (µ 3 -OH) 2 (NCMe) 6 2, respectively, which can be compared to the previously reported bimetallic complex, (dme) 2 Eu(µ-OC 6 H 3 Me 2 -2,6) 3 Eu(OC 6 H 3 Me 2 -2,6)(dme) 3, isolated with methyl substituents (dme = 1,2-dimethoxyethane). Acetonitrile has been found to be an excellent solvating ligand for the formation of crystalline complexes in this series. Complex 1 crystallizes from acetonitrile in the monoclinic space group P2 1 /c with a = 11.7117( 14), b = 17.616(2), c = 18.263(2) Å, β = 91.318(8)Њ, U = 3766.8(7) Å 3 and D c = 1.282 Mg m Ϫ3 for Z = 4. Complex 2 crystallizes from acetonitrile in the monoclinic space group P2 1 /n with a = 13.676(3), b = 20.325(4), c = 32.632(6) Å, β = 91.068(12)Њ, U = 9069(3) Å 3 and D c = 1.429 Mg m Ϫ3 for Z = 4.

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“…Les tendances de recherche actuelles sont dirigées vers des produits réfractaires qui supportent les accroissements de température causés par l'impact des rayons cathodiques sous des densités de courant élevées tout en conservant des réponses linéaires [33]. 7.4.4 Les luminophores pour écrans renforçateurs de rayons X.…”

Section: Les Composés Luminescents Polycristal-unclassified

Luminescence des ions activateurs dans les matériaux inorganiques et applications

Boulon

1986

Rev. Phys. Appl. (Paris)

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2014 Nous présentons les mécanismes de base de l'absorption d'un rayonnement de pompage et de l'émission de fluorescence des matériaux inorganiques luminescents et nous donnons la liste des principaux composés utilisés par la technologie moderne. Après avoir montré les relations entre les recherches conduites pour le développement des deux types de matériaux (luminophores polycristallins et monocristaux lasers) nous insistons plus sur l'état de l'art et les perspectives des recherches des luminophores pour l'éclairage, la télévision, les écrans renforçateurs de rayons X et les écrans électroluminescents. Abstract. 2014 We present the basic mechanisms of the absorption of the pumping radiation and the fluorescence emission of inorganic luminescent materials and we give the list of main compounds used by modern technology. Then, we show there were connections between polycrystalline phosphors and laser-material research. We insist on the present status and the future development of phosphors for fluorescent lighting, TV screens, X-ray intensifier screens and electroluminescent devices.

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Use of Rare Earths in Television and Cathode Ray Phosphors

Cited by 16 publications

References 0 publications

Extraction and Separation of Rare Earth Metal Ions with DODGAA in Ionic liquids

Extraction and Separation of Rare Earth Metal Ions with DODGAA in Ionic liquids

Substituent effects in the formation of aryloxide-bridged europium complexes

Luminescence des ions activateurs dans les matériaux inorganiques et applications

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