Abstract: The invention relates to an aluminum oxide particle mixture for reflection layers in discharge lamps, and to discharge lamps of this type. The mixture has a first coarse-grained component and a second fine-grained component, with a primary grain size of preferably d50(1) between 0.3 ?m and 0.5 ?m and d50(2) of at most 0.05 ?m, respectively (with an agglomerated size of the fine particles of less than 0.15 ?m).

Abstract: The LED has phosphor particles (2) with a mean phosphor particle size d50 selected from the range of from 0.1 ?m, inclusive, to 1.5 ?m, inclusive, in particular the phosphor particles having primary particles (4) with a mean particle size (5) selected from the range of from 0.1 ?m, inclusive, to 1.0 ?m, inclusive. The primary particles, which comprise, for example, an yttrium aluminum garnet (Y3Al5O12) doped with cerium, are agglomerated to form the phosphor particles.

Abstract: Discharge lamp with phosphor A discharge lamp (1) having a discharge vessel (2) which surrounds a discharge medium which emits electromagnetic radiation in the VUV region when the lamp is operating has, on the inner side of the discharge vessel wall, a first phosphor layer, which faces the discharge medium and comprises a UVA component which can be excited by the VUV radiation and is intended to emit electromagnetic radiation in the UVA region. Moreover, the discharge lamp (1) has a second phosphor layer, which can be excited by the UVA radiation and is intended to emit electromagnetic radiation in the visible region. This second phosphor layer either lies beneath the first phosphor layer or is applied to the outer side of the discharge vessel wall. This results in a lower color locus shift compared to a conventional phosphor mixture which can be excited directly by VUV radiation. (FIG.

Abstract: A discharge lamp (1) having a discharge vessel (2) that surrounds a discharge medium that emits electromagnetic radiation in the VUV region during operation of the lamp, has on the inner side of the discharge vessel wall a yellow phosphor layer facing the discharge medium, and a blue phosphor layer lying therebelow.

Abstract: The invention proposes a dielectric barrier discharge lamp having a phosphor mixture and improved color rendering. The phosphor mixture comprises at least the phosphor components A: cerium-activated yttrium aluminate (Y3Al5O12:Ce) and B: europium-activated barium magnesium aluminate (BaMgAl10O17:Eu). To further improve the color rendering and to match the emission spectrum to the spectral sensitivity of film, the phosphor mixture optionally also comprises the phosphor component C: cerium- and manganese-activated gadolinium magnesium zinc pentaborate (Gd(Zn,Mg)B5O10:(Ce, Mn)) and/or the phosphor component D: europium-activated strontium aluminate (Sr4Al14O25:Eu).

Abstract: The phosphor composition for low-pressure gas discharge lamps with a high light efficiency for generating radiation with a color temperature of greater than 5000 K and a very good general color rendering index Ra of greater than 90 includes at least one halophosphate phosphor, a phosphor which emits in the red wavelength region and a phosphor which emits in the blue-green wavelength region. In addition, according to the invention the phosphor composition contains an Eu-doped barium magnesium aluminate phosphor BaMgAl10O17:Eu and a Tb-doped green-emitting phosphor.

Abstract: A coated luminescent material having a luminescent material powder formed by grains, the luminescent grains being coated, and the coating being at most 5 nm, preferably at most 2 nm.

Abstract: The phosphor composition for low-pressure gas discharge lamps with a high light efficiency for generating radiation with a color temperature of greater than 5000 K and a very good general color rendering index Ra of greater than 90 includes at least one halophosphate phosphor, a phosphor which emits in the red wavelength region and a phosphor which emits in the blue-green wavelength region. In addition, according to the invention the phosphor composition contains an Eu-doped barium magnesium aluminate phosphor BaMgAl10O17:Eu and a Tb-doped green-emitting phosphor.

Abstract: The invention relates to a method for drying wet or moist coatings on substrates for lamps, in which at least 25%, advantageously more than 50%, of the electromagnetic energy from a thermal radiator which is supplied for drying the coatings lies in the wavelength range between 0.7 and 1.5 &mgr;m. Tubular radiators (5) are used as thermal radiators for generating the electromagnetic radiation.

Abstract: The invention relates to a signaling lamp with VUV phosphor excitation, in particular for traffic applications. It further relates to the use of phosphor mixtures for red, green and yellow signaling lamps and to a correspondingly constructed traffic light. (FIG. 1).

Abstract: A barium magnesium aluminate phosphor having improved maintenance and efficiency is provided. The novel phosphor is suitable for use in conventional fluorescent lamp applications and applications utilizing VUV excitation, including Xe excimer lamps and plasma display panels.

Abstract: A xenon excimer (Xe.sub.2) radiation source for producing vacuum ultraviolet (VUV), broad-band, molecular radiation of wavelengths shorter than 200 nm includes fluorescent materials for excitation by the VUV radiation and illumination purposes. The fluorescent materials include a mixed borate with the general formula: (Y.sub.x Gd.sub.y Eu.sub.z)BO.sub.3 ; a mixed aluminate with the general formula: (B.sub.a Eu.sub.y)MgAl.sub.10 O.sub.17 ; a mixed aluminate with the general formula: (Y.sub.x Gd.sub.y Eu.sub.z).sub.3 Al.sub.5 O.sub.12 ; a mixed silicate with the general formula: (Y.sub.x Sc.sub.y Tb.sub.z).sub.2 SiO.sub.5 ; a mixed borate with the general formula: (Y.sub.x Gd.sub.y Tb.sub.z)BO.sub.3 ; and a mixed phosphate with the general formula: (Ln.sub.x Ce.sub.y Sc.sub.w Tb.sub.z)PO.sub.3.