摘要:
Oxo-acid salts, double oxides or complex oxides contain 0.001-10 atom % of Zr or Hf. They emit near-ultraviolet radiation when excited with vacuum-ultraviolet radiation.
摘要:
A fluorescent lamp including a phosphor layer comprising a phosphor blend including four or more optimized phosphors emitting within a specific spectral range to optimize luminosity for a given color rendering index (CRI) and color coordinated temperature (CCT). The blend will include at least four phosphors selected from the following: a blue phosphor having an emission peak at 440-490 nm, a blue-green phosphor having an emission peak at 475-525 nm, a green phosphor having an emission peak at 515-550 nm, an orange phosphor having an emission peak from 550-600 nm, a deep red phosphor having an emission peak at 615-665 nm, and a red phosphor having an emission peak at 600-670 nm.
摘要:
Long persistence red phosphors of alkaline earth metal phosphates, alkaline earth magnesium silicates and alkaline earth magnesium di-silicates are doubly activated with europium and manganese and contain a trivalent or quadrivalent thermal trapping agent. The thermal trapping cation feeds thermal energy to the europium ion which in turn feeds the energy to the manganese ion that emits in the red region of the spectrum.
摘要:
Disclosed is a fluorescent lamp which comprises a mixture of a phosphor (i) comprising an alkaline earth metal halophosphate phosphor activated with divalent europium, represented by the general formula:M.sub.5-x X(PO.sub.4).sub.3 :Eu.sup.2+ (x)wherein M consists of Ba, Ca and Mg, containing 3 to 4.5 gram-atom of Ba, 0.5 to 2 gram-atom of Ca and 0.01 to 1 gram-atom of Mg each; X is one or more of F, Cl or Br; and 0.01
摘要:
A luminescent phosphor composition having enhanced luminescent decay lifetime consists essentially of a non-stoichiometric tin and manganese coactivated alkaline earth orthophosphate represented by the formulaSr.sub.(3-v-w-x-y-z) .quadrature..sub.v Mg.sub.w Ca.sub.x (PO.sub.2).sub.4 :Sn.sub.y Mn.sub.zwhere0.001.ltoreq.v.ltoreq.0.050.180.ltoreq.w.ltoreq.0.350.ltoreq.x.ltoreq.0.080.015.ltoreq.y.ltoreq.0.050.0005.ltoreq.z.ltoreq.0.0905.An improved fluorescent lamp employing the disclosed phosphor is also described.
摘要翻译:具有增强的发光衰变寿命的发光荧光体组合物基本上由公式Sr(3-vwxyz)&squ&vMgwCax(PO2)4:SnyMnz表示的非化学计量的锡和锰共活化的碱土金属正磷酸盐组成,其中0.001 = 0.05 0.180 = w = 0.35 0 = x = 0.08 0.015 = y = 0.05 0.0005 = z = 0.0905。 还描述了采用所公开的荧光体的改进的荧光灯。
摘要:
A fluorescent lamp having excellent color rendering property and high luminous efficiency comprises a fluorescent layer coated on an inner surface of a discharge tube.The fluorescent layer mainly comprises a first fluorescent material having-emission peak in a range of wavelength of 480 to 490 nm which is an alkaline earth metal boron phosphate activated by a divalent europium compound having the formulam(Sr.sub.1-x-y-p Ba.sub.x Ca.sub.y Eu.sub.p O).multidot.(1-n)P.sub.2 O.sub.5 .multidot.nB.sub.2 O.sub.3wherein the parameters x, y, p, m and n are in ranges of0.ltoreq.x.ltoreq.0.50.ltoreq.y.ltoreq.0.20.001.ltoreq.p.ltoreq.0.151.75.ltoreq.m.ltoreq.2.30 and0.05.ltoreq.n.ltoreq.0.23and a second fluorescent material having the emission peak in a range of wavelength of 620 to 649 nm and a band width (50%) of 120 to 160 nm.
摘要翻译:具有优异的显色性和高发光效率的荧光灯包括涂布在放电管的内表面上的荧光层。 荧光层主要包括在波长为480〜490nm的范围内具有由具有式m(Sr1-xy-pBaxCayEupO)x(Sr1-xy-pBaxCayEupO)x的二价铕化合物活化的碱土金属硼磷酸盐的第一荧光材料 1-n)P 2 O 5 x N B 2 O 3,其中参数x,y,p,m和n在0≤x≤0.00的范围内,y = 0.2 0.001 = p < 具有在620〜649nm的波长范围内的发射峰值和120〜160nm的带宽(50%)的第二荧光材料。
摘要:
A fluorescent lamp contains a blend of phosphors to provide predetermined minimum power levels of radiation at predetermined spectral bands that are used in the analysis of liquid samples placed close to the lamp.
摘要:
A process of preparing calcium hydrogen phosphate anhydride suitable as a raw material for phosphate phosphors, wherein CaHPO.sub.4.2H.sub.2 O is precipitated by mixing aqueous solutions of NaNH.sub.4 HPO.sub.4.4H.sub.2 O and CaCl.sub.2.6H.sub.2 O at 5.degree.-40.degree. C. An entire quantity of CaHPO.sub.4.2H.sub.2 O to be converted to CaHPO.sub.4 in one batch is put into an acidified water maintained above 80.degree. C. all at once. Crystalline CaHPO.sub.4 is obtained through agitation of a resultant hot slurry for a few minutes. Crystal habit of the product depends on the pH of the hot water: lozenge-shaped plates when the pH is below 3.4, parallelogram plates in the pH range of 3.4-4.4, and square or rectangular plates when the pH is above 4.4. The particle size of CaHPO.sub.4 depends on the water temperature and the degree of agitation. To precipitate CaHPO.sub.4.2H.sub.2 O in the presence of suitable quantity of seed crystals is effective for minimizing the Na content of CaHPO.sub.4.
摘要:
A low-pressure mercury vapour discharge lamp provided with a luminescent coating comprising three luminescent materials each emitting in a narrow spectral range. The first material has an emission band with a maximum between 430 and 490 nm; the second material has its emission in the range 520-565 nm; the third material emits in the range 590-630 nm. The second material is defined by one of the formulas:A. Ce.sub.1-x-y La.sub.x Tb.sub.y MgAl.sub.11 O.sub.19b. (Ce.sub.1-x-y La.sub.x Tb.sub.y).sub.2 O.sub.3.nAl.sub.2 O.sub.3The first material is preferably chosen fromC. A.sub.1-p Eu.sub.p Mg.sub.2-q Mn.sub.q Al.sub.16 O.sub.27d. B.sub.5.5-x Eu.sub.x Mg.sub.6-y Mn.sub.y Al.sub.55 O.sub.94(a and B are barium and/or strontium).
摘要:
Color-corrected high-pressure mercury-vapor lamp provides good color rendition of illuminated objects, and especially good color rendition of flesh tones. The lamp utilizes a particular phosphor coating principally comprising a two-component blend. One of the phosphor blend components provides an emission in the shorter wavelength region of the visible spectrum peaking at from 440 nm to 470 nm, and an example of this component is a strontium chlorophosphate having an apatite structure and activated by a divalent europium. The other phosphor component provides an emission in the longer wavelength region of the visible spectrum peaking at from 605 nm to 630 nm, and an example of this phosphor component is yttrium phosphate-vanadate activated by tervalent europium. For the foregoing examples, the relative weight ratio of the one phosphor component to the other phosphor component is from 0.05:1 to 0.4:1.