摘要:
An ink composition is provided. The composition includes a binder material and at least one narrow band emission phosphor being uniformly dispersed throughout the composition, wherein the narrow band emission phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U6+-containing phosphor, a green-emitting Mn2+-containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn4+, and a mixture thereof. A device is also provided.
摘要:
A fluorescent material includes at least one fluorescent compound having a structure formula of ABXZY3-Z as defined in the specification, a plurality of NH3+ group-containing ions bound to the fluorescent compound through protonation of amine groups of an amine composition, and a plurality of COO− group-containing ions bound to the fluorescent compound through deprotonation of carboxyl groups of an acid composition. The amine composition has a total hydrogen bonding Hansen solubility parameter (TδH) ranges from 2.4 to 3.3 (cal/cm3)1/2, and the acid composition has a total polar Hansen solubility parameter (TδP) which is less than 1.4 (cal/cm3)1/2.
摘要:
Phosphor-containing coating compositions and methods capable of changing the lumen maintenance characteristics of phosphor-containing coatings and fluorescent lamps that utilize such coatings. Lumen maintenance of a fluorescent lamp can be modified by forming a phosphor-containing coating to contain at least a first phosphor that depreciates during operation of the fluorescent lamp, and forming the phosphor-containing coating to further contain an additive composition in a sufficient amount and sufficiently uniformly distributed in the phosphor-containing coating to inhibit depreciation of the first phosphor during operation of the fluorescent lamp.
摘要:
The invention belongs to the field of luminescent materials. Disclosed are luminescent materials doped with metal nano particles and preparation methods therefor. The luminescent materials doped with metal nano particles are represented by the chemical formula: A5-x(PO4)2SiO4:xRE@My, wherein @ is for coating, M is inner core, M is one metal nano particle selected from Ag, Au, Pt, Pd and Cu; RE is one or two ions selected from Eu, Gd, Tb, Tm, Sm, Ce, Dy and Mn; A is one or two elements selected from Ca, Sr, Ba, Mg, Li, Na and K; x is stoichiometric coefficient, 0
摘要:
The present invention relates to alkaline earth metal silicate luminophores having improved long-term stability and to a corresponding method for improving the long-term stability of alkaline earth metal silicate luminophores. The luminophore according to the invention is a luminophore comprising a base lattice according to the general chemical formula EAxSiyOz, where x, y, z>0. The component EA is formed by one or more alkaline earth metals. An activator, for example Eu2′ or Mn2′, is doped into the base lattice. The luminophore has the fundamental property to absorb radiation in a first wavelength range and emit radiation in a second wavelength range that is different from the first wavelength range. The luminophore is designed in the form of crystals. According to the invention, the surfaces of the crystals of the luminophore are chemically modified such that at least portions of the surfaces thereof are formed by a chemical compound of the general formula EauZ2. The component Z is formed by anions, which can be chemically combined with the EA cations of the luminophore. The variable u is equal to an ion charge of the anions Z. The chemical modification is therefore not a coating.
摘要:
A high lumen output compact fluorescent lamp is disclosed that has a luminous efficiency of 40 lumen/W or higher. The fluorescent lamp comprises an envelope enclosing a discharge space, means for providing a discharge in the discharge space, a discharge gas sealed in the discharge space and a fluorescent layer made of a phosphor blend coated on the inner surface of the envelope. The phosphor blend comprises a, 55 to 80 weight % of a first phosphor having an emission band with a maximum between 620 nm and 635 nm and having a half-value width of 70 nm to 150 nm, b, 5 to 30 weight % of a second phosphor having an emission band with a maximum between 605 nm and 615 nm and having a half-value width of 1 nm to 10 nm, c, 0 to 20 weight % of a third phosphor having an emission band with a maximum between 540 nm and 550 nm and having a half-value width of 1 nm to 10 nm, and d, 0 to 30 weight % of a fourth phosphor having an emission band with a maximum between 480 nm and 500 nm and having a half-value width of 50 nm to 80 nm. The lamp havs an Ra value greater than 90 and a photographic color temperature between 3000 K and 3500 K. A lamp is also disclosed in which the phosphor blend comprises: a, 20 to 60 weight % of a first phosphor having an emission band with a maximum between 620 nm and 635 nm and having a half-value width of 70 nm to 150 nm, b, 20 to 65 weight % of a second phosphor having an emission band with a maximum between 480 nm and 500 nm and having a half-value width of 50 nm to 95 nm, c, 0 to 20 weight % of a third phosphor having an emission band with a maximum between 450 nm and 460 nm and having a half-value width of 40 nm to 65 nm and d, 0 to 30 weight % of a fourth phosphor having an emission band with a maximum between 610 nm and 630 nm and having a half-value width of 1 nm to 10 nm. This lamp has an Ra value greater than 90 and a photographic color temperature between 5000 K and 6000 K.
摘要:
A europium-activated barium aluminate phosphor is described wherein the phosphor is doped with tetravalent ions of Hf, Zr, or Si. Preferably, the phosphor is represented by (Ba1-xEux)MgAl10O17: (Hf, Zr, Si)y where 0.05≦x≦0.25 and 0
摘要翻译:描述了一种铕活化的铝酸钡荧光体,其中磷光体掺杂有Hf,Zr或Si的四价离子。 优选地,荧光体由(Ba1-xEux)MgAl10O17:(Hf,Zr,Si)y表示,其中0.05 <= x <= 0.25且0
摘要:
Small particle lanthanum, thulium phosphate phosphors are produced by thermal decomposition of gels or solutions or powders including lanthanum, thulium, lithium and alkaline earth salts and an organic precursor such as trimethyl phosphate and boric acid at a temperature well below the normal temperature of solid state reaction. The phosphor of the present invention has the empirical formula:(La.sub.1-x-y-z Tm.sub.x Li.sub.y Sr.sub.z)PO.sub.4wherein: 0.001.ltoreq.x.ltoreq.0.05; 0.01.ltoreq.y.ltoreq.0.05; and 0.0.ltoreq.z.ltoreq.0.05and exhibits a narrow band emission in blue region, peaking at 453 nm when excited by 147 and 173 nm radiation from Xenon gas mixture. The phosphor exhibits uniform and spherical shape particles in the range 0.1 to 5 microns, and is appropriate for thin phosphor screens required for a variety of flat panel display and lamp applications. The particle size varies with method of preparation. The phosphors also exhibit high brightness, good color saturation, better stability and shorter persistence when excited with 147 and 173 nm radiation than the currently available commercial phosphor, Eu.sup.2+ actvated barium magnesium aluminate for plasma display panels.
摘要翻译:小颗粒镧,磷酸铋磷光体是通过凝胶或溶液或粉末包括镧,ium,锂和碱土金属盐以及有机前体如磷酸三甲酯和硼酸在远低于固态常温的温度下进行热分解制备的 反应。 本发明的荧光体具有以下经验式:(La1-x-y-z TmxLiySrz)PO4,其中0.001≤x≤0.05; 0.01 = y = 0.05; 和0.0 = z <0.05,并且在蓝色区域中呈现窄带发射,当由氙气体混合物的147和173nm辐射激发时,峰值在453nm。 荧光体显示0.1至5微米的均匀和球形颗粒,适用于各种平板显示器和灯应用所需的薄荧光屏。 粒径随着制备方法的不同而不同。 当用147和173nm辐射激发时,荧光体还表现出高亮度,良好的色饱和度,更好的稳定性和更短的持久性,比目前可用的用于等离子体显示面板的商业磷光体Eu2 +活化的钡铝酸镁。
摘要:
A photostimulable storage phosphor within the scope of following formula (I):M.sub.3 (PO.sub.4).sub.2 :xEu.sup.2+, yT.sup.3+, zZr.sup.4+wherein: M is at least one of the alkaline earth metals selected from the group consisting of Ca, Sr and Ba, x corresponds with an atom fraction value 5.times.10.sup.-5 .ltoreq..times..ltoreq.10.sup.-1, y corresponds with an atom fraction value 0.ltoreq.y.ltoreq.10.sup.-1, T.sup.3+ is at least one member selected from the group consisting of La.sup.3+, Lu.sup.3+, y.sup.3+ and Gd.sup.3+, z corresponds with an atom fraction value 0.ltoreq.z.ltoreq.10.sup.-1, and 5.times.10.sup.-5 .ltoreq.z+y.ltoreq.10.sup.-1.