Abstract:
A filter capable of performing collection of organic materials, bacteria, viruses and other hazardous materials and sterilization/decomposition of collected matter at low cost with extremely high efficiency; and a process for producing the same. In particular, a porous semiconductor constituted of a semiconductor material capable of light emission is formed inside or on the surface of a porous ceramic or metal as a substrate. Electrodes are fitted thereto to thereby obtain a filter. Fluid is filtered while applying voltage so as to emit ultraviolet radiation. Thus, sterilization/decomposition of hazardous materials, etc. can be performed simultaneously with the filtration thereof.
Abstract:
L'invention concerne un procédé de préparation d'un bloc polycristallin d'halogénure de formule A e Ln f X(3 f + e ) dans laquelle Ln représente une ou plusieurs terre rare(s), X représente un ou plusieur(s) atome(s) d'halogène choisi parmi CI, Br ou I, et A représente un ou plusieurs alcalin(s) comme K, Li, Na, Rb ou Cs, e pouvant être nul, étant inférieur où égal à 3f, et f étant supérieur ou égal à 1, à faible teneur en eau et oxyhalogénure, comprenant une étape de chauffage d'un mélange d'une part d'au moins un composé comprenant au moins une liaison LnX et d'autre part d'une quantité suffisante de NH 4 X pour l'obtention du taux souhaité d'oxyhalogénure, ladite étape menant à une masse fondue comprenant l'halogénure de terre rare ladite étape de chauffage étant suivie d'une étape de refroidissement, l' étape de chauffage, après avoir atteint 300°C ne redescendant jamais en dessous de 200°C avant l'obtention de la masse fondue. Les blocs ainsi réalisés permettent la croissance de monocristaux très purs aux propriétés de scintillation remarquables.
Abstract:
A rare earth element doped composition having a dopant concentration of up to about 60 mole percent of one or more rare earth elements selected from Tb, Dy, Ho, Er, Tm, Yb and Lu, wherein the composition is optically transparent to wavelengths at which excitation, fluorescence or luminescence of the rare earth elements occur. Method for making the compositions, composite materials having dispersed therein the compositions and luminescent devices containing optical or acoustical elements formed from the composite materials are also disclosed.
Abstract:
The present disclosure describes a scintillation crystal having the general formula RE(1-y)MyF3XA3(1-x), wherein RE is selected from the group consisting of La, Gd, Y, Lu, or mixtures thereof; A is selected from Cl, Br or I, and M is an activator ion selected from the group consisting of Ce3+, Pr3+ or Eu3+ and combinations thereof containing two or all three activator ions and further optionally comprising Ho, Er, Tm, or Yb also in the 3+ oxidation state. We also disclose a scintillation detector including a scintillation crystal, and downhole tools and methods of oil exploration utilizing such scintillation crystals.
Abstract:
Es wird ein transparentes, lumineszierendes Kunststoffglas, das lumineszierende Nanopartikel enthält sowie ein Verfahren zu dessen Herstellung beansprucht. Die Gläser unterscheiden sich in ihrer Transparenz kaum oder nur geringfügig von dem reinen Kunststoffglas. Ferner sind sie auf einfache Weise herstellbar.
Abstract:
The present invention relates to a sterilization system (1) where the article (20) which is to be sterilized is coated with a Pr 3+ comprising material (10), which emits UV-C light upon stimulation with a blue LED (30).
Abstract:
The present invention describes the use of polystyrene (PS) and polyethylene terephthalate (PET) obtained from recyclable materials as host lattice for obtaining luminescent films. Organic pigments (OPs) and fluorescent organic pigments (FPOs) were used on these materials as dopants; e.g., blue, yellow and red, having luminescent emissions at 450, 510 and 590 nm, respectively, using also rare earths and nanoparticles of Al 2 O 3 :Tb and Al 2 O 3 :Eu as dopants. PS and PET films were obtained by spray pyrolysis using glass and commercial GaN LEDs substrates (with emissions at 390 nm for violet light and 455 nm for blue light). Measurements of photo and electroluminescence of the films obtained were made using PS films properly doped in electroluminescent devices emitting blue and violet light, which resulted in the emission of white light.
Abstract translation:本发明描述了从可回收材料获得的聚苯乙烯(PS)和聚对苯二甲酸乙二醇酯(PET)作为主晶格用于获得发光膜的用途。 在这些材料上使用有机颜料(OPs)和荧光有机颜料(FPO)作为掺杂剂; 例如蓝色,黄色和红色,分别使用稀土和Al 2 O 3 :Tb和Al 2 O 3:Eu的纳米颗粒作为掺杂剂,在450,510和590nm处具有发光。 通过使用玻璃和商业GaN LED衬底的喷雾热解(紫外光为390nm,蓝光为455nm)获得PS和PET膜。 使用在发光蓝光和紫光的电致发光器件中适当掺杂的PS膜制备所获得的膜的光和电致发光测量,这导致白光的发射。
Abstract:
Composite materials in which optically transparent solid solution inorganic nanoparticles are dispersed in a host matrix inert thereto, wherein the nanoparticles are doped with one or more active ions at a level up to about 60 mole% and consist of particles having a dispersed particle size between about 1 and about 100 nm, and the composite material with the nanoparticles dispersed therein is optically transparent to wavelengths at which excitation, fluorescence or luminescence of the active ions occur. Luminescent devices incorporating the composite materials are also disclosed.