Abstract: A long-lived phosphor composition is provided, along with methods for making and using the composition. More specifically, in one embodiment, the phosphor comprises a material having a formula of Ax-y-zAl2-m-n-o-pO4:Euy, REz, Bm, Znn, Coo, Scp. In this formula, A may be Ba, Sr, Ca, or a combination of these metals, x is between about 0.75 and 1.3, y is between about 0.0005 and 0.1, z is between about 0.0005 and 0.1, m is between about 0.0005 and 0.30, n is between about 0.0005 and 0.10, o is between about 0 and 0.01 and p is between about 0 and 0.05. RE is Dy, Nd, or a combination thereof. In another embodiment, methods are provided for making persistent phosphors comprising the formulations above. Other embodiments provide applications for such a phosphor, comprising uses in toys, emergency equipment, clothing, and instrument panels, among others.

Abstract: Ceramic materials with relatively high resistance to wetting by various liquids, such as water, are presented, along with articles made with these materials, methods for making these articles and materials, and methods for protecting articles using coatings made from these materials. One particular embodiment is an article that comprises a coating having a surface connected porosity content of up to about 5 percent by volume. The coating comprises a material that comprises a primary oxide and a secondary oxide, wherein (i) the primary oxide comprises a cation selected from the group consisting of cerium, praseodymium, terbium, and hafnium, and (ii) the secondary oxide comprises a cation selected from the group consisting of the rare earth elements, yttrium, and scandium.

Abstract: A method of producing high purity nanoscale powders in which the purity of powders produced by the method exceeds 99.99%. Fine powders produced are of size preferably less than 1 micron, and more preferably less than 100 nanometers. Methods for producing such powders in high volume, low-cost, and reproducible quality are also outlined. The fine powders are envisioned to be useful in various applications such as biomedical, sensor, electronic, electrical, photonic, thermal, piezo, magnetic, catalytic and electrochemical products.

Abstract: The present invention provides for a composition comprising an inorganic scintillator comprising an alkali metal hafnate, optionally cerium-doped, having the formula A2HfO3:Ce; wherein A is an alkali metal having a valence of 1, such as Li or Na; and the molar percent of cerium is 0% to 100%. The alkali metal hafnate are scintillators and produce a bright luminescence upon irradiation by a suitable radiation.

Abstract: Provided is a method of producing spherical nanophosphor particles having a uniform size distribution. When nanophosphor obtained using the method is used in a flat panel display, the flat panel display has higher screen brightness and a higher resolution.

Abstract: A scintillator crystal and a method for growing a scintillator crystal are provided which includes an as-grown Edge-defined Film-fed Growth (EFG) single crystal. The as-grown EFG single crystal has a body having a thickness, a width, and a length, such that the thickness?width<length, and the body has a cross-sectional area perpendicular to the length of not less than about 16 mm2.

Abstract: A method of fractionating a dispersion of oxidic nanoparticles wherein at least one step of the method is a membrane crossflow filtration step, the flow of the dispersion over the membrane being brought about by means of driven rotating parts; and dispersions of oxidic nanoparticles that are obtainable by the method.

Abstract: A nitridosilicate-based compound is produced by reacting an alkaline-earth metal compound capable of generating an alkaline-earth metal oxide by heating or a rare earth compound capable of generating a rare earth oxide by heating with at least a silicon compound, while the alkaline-earth metal compound or the rare earth compound is being reduced and nitrided by the reaction with carbon in an atmosphere of nitriding gas. Because of this, a nitridosilicate-based compound of high quality can be produced industrially at low cost.

Abstract: Disclosed is a silicate phosphor represented by Formula: Lia-xAxSrb-y-z-lByEuzClSic-mDmOd-nEn where A includes at least one ion selected from the group consisting of Na, K, Rb, and Cs. B includes at least one ion selected from the group consisting of Mg, Ca, Ba and Zn. C includes at least one ion selected from the group consisting of Sc, Y, La, Gd, Ce, Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm, Yb, Lu and Bi. D includes at least one ion selected from the group consisting of B, Al, Ga, In and TI. E includes at least one ion selected from the group consisting of F, Cl, Br, and I. Further disclosed is a white light emitting device including the silicate phosphor.

Abstract: A catalyst carrier and exhaust gas purification catalyst superior in sintering inhibiting effect of precious metal catalyst particles are provided, that is, a catalyst carrier for carrying a precious metal comprised of a composite oxide of an electron accepting element (La) having an electron accepting property of accepting electrons from a precious metal element by approach or contact with the precious metal element (Pt) and not changing in atomic valence in an oxidation reduction reaction and of another element (Si) and, further, an exhaust gas purification catalyst comprised of this catalyst carrier on which precious metal catalyst particles are carried.

Abstract: A deoxidizer for absorbing and removing oxygen from the surrounding atmosphere, comprising oxygen-deficient cerium oxide having a powder form with a specific surface area of 0.6 m2/g or less or the form of a formed body with a specific surface area of 3.0 m2/g or less. The deoxidizer reacts with oxygen even in a moisture-free atmosphere, does not trigger a metal detector nor heat up when microwaved in a microwave oven, and is prevented from abruptly reacting with oxygen and igniting even when brought into direct exposure to the air. The deoxidizer is therefore suited for oxygen removal, for example, inside food packages.

Abstract: Novel nonlinear optical materials are described having the general formula MxM?yScz(BO3)4 where M and M?are metals, typically rare earth metals, and the sum of x, y, and z is about four. One example of such a material is La0.7Y0.3Sc3(BO3)4. Exemplary crystalline materials according to the general formula exhibit useful optical characteristics and desirable physical properties for nonlinear optical applications. Novel compositions and devices using the nonlinear optical materials also are described.

Abstract: A sputtering target which is formed of a sintered body including an oxide main components of which are In and Sm. A sputtering target in which a sintered body of an oxide including In and Sm as main components is doped with at least one element with an atomic valency of positive tetravalency or higher in an amount of 20 at. % or less relative to the total sum of all cation elements.

Abstract: A solid material is presented for the partial oxidation of natural gas. The solid material includes a solid oxygen carrying agent and a hydrocarbon activation agent. The material precludes the need for gaseous oxygen for the partial oxidation and provides better control over the reaction.

Abstract: The present invention provides a process for the preparation of nanowires of metal oxides with dopant elements in lower valence state. The nanomaterials/materials with dopants in lower valence state are important as these exhibit markedly different characteristics than higher valence state materials of same composition. Nanowires show markedly enhanced properties in lateral direction. The invented process presents a procedure for preparation of different types of nanowires in oxide form that are useful for different applications. In this a precursor is ignited in a specially designed container/enclosure that produces the product with the described features. The process is simple and involves a single step/stage is of very short time per batch. The invention provides a process, which gives controlled size of nanowires and is suitable for the production of nanowires/nanomaterials of desired metal oxides with dopant elements in valence state.

Abstract: To provide a slurry for polishing which is excellent in polishing properties, can suppress scratches and is appropriate for accurate polishing in semiconductor production steps, and fine particles of oxide crystal for it. Fine particles of oxide crystal, characterized in that the ratio of the crystallite size measured by X-ray diffraction method and calculated by Scherrer method to the average primary particle size equivalent to sphere from the specific surface area measured by BET is the crystallite size: the average primary particle size=1:0.8 to 1:2.5. A slurry for polishing, characterized in that the fine particles of oxide crystal are dispersed in a liquid medium, and from 0.1 to 40 mass % of the fine particles of oxide crystal are contained, per the total mass of the slurry for polishing.

Abstract: A method of forming rare earth oxide nanocrystals include the steps of dissolving a rare earth including compound in a solution containing at least one organic solvent, heating the solution to a temperature of at least 160° C., wherein a concentration of the rare earth including compound provided upon decomposition is sufficient to provide critical supersaturation of at least one active intermediate in the solution to nucleate a plurality of rare earth oxide nanocrystals. The plurality of rare earth nanocrystals are then grown, wherein the growing step proceeds at least in part in the absence of critical supersaturation of the active intermediate. The rare earth nanocrystals can assemble into at least one close-packed, ordered nanocrystal superlattice.

Abstract: A method of manufacturing titanium dioxide particles can produce titanium dioxide particles where a rare earth element is substituted at the titanium sites from which it is possible to highly efficiently take out fluorescence attributable to the rare earth element. The method of manufacturing titanium dioxide particles doped with a rare earth element comprises a step of preparing a liquid precursor containing a titanium source and rare earth metal source, the doping ratio of the rare earth element in the liquid precursor being within a range not less than 0 at % and not more than 5.0 at %, a step of generating thermal plasma and a step of providing the liquid precursor into the thermal plasma.

Abstract: This invention is intended to overcome the problems with conventional phosphor materials, specifically to overcome the problems of insufficient luminance and of color impurity on the screens of color display units when green phosphor materials have blue or red light emission. This invention is intended to provide vacuum ultraviolet excited green phosphor materials that include terbium, gadolinium-doped rare-earth aluminum scandium borate represented by the following general formula: (Y1-x-yGdxTby)Al3-zScz(BO3)4 (0?x<0.5, 0<y<0.5, 0<z?3). The phosphor materials of this invention can be used for light-emitting devices. Using the phosphor materials in combination with blue phosphor materials and red phosphor materials enables the formation of white emitting device.

Abstract: A cerium oxide powder for one-component CMP slurry, which has a specific surface area of 5 m2/g or more, and a ratio of volume fraction of pores with a diameter of 3 nm or more to that of pores with a diameter less than 3 nm of 8:2˜2:8, is disclosed. A method for preparing the same, a one-component CMP slurry comprising the same as an abrasive material, and a method of shallow trench isolation using the one-component CMP slurry are also disclosed. The CMP slurry causes no precipitation of the cerium oxide powder even if it is provided as a one-component CMP slurry, because the CMP slurry uses, as an abrasive material, cerium oxide powder that is obtained via a low-temperature calcination step, optionally a pulverization step, and a high-temperature calcination step and has a high pore fraction and low strength.

Abstract: Proton conductivity has been shown in acceptor-doped rare earth orthoniobates and tantalates (LnNbO4 and LnTaO4) at high temperatures and in a humid atmosphere. The use of the materials as an electrolyte in a laboratory-scale fuel cell and water vapour sensor has been demonstrated. Results for Ca-doped LaNbO4 are given as examples.

Abstract: A process to prepare stoichiometric-nanostructured materials comprising generating a plasma, forming an “active volume” through introduction of an oxidizing gas into the plasma, before the plasma is expanded into a field-free zone, either (1) in a region in close proximity to a zone of charge carrier generation, or (2) in a region of current conduction between field generating elements, including the surface of the field generation elements, and transferring energy from the plasma to a precursor material to form in the “active volume” at least one stoichiometric-nanostructured material and a vapor that may be condensed to form a stoichiometric-nanostructured material. The surface chemistry of the resulting nanostructured materials is substantially enhanced to yield dispersion stable materials with large zeta-potentials.

Abstract: The invention is directed to a method by exposing at least a portion of a luminescent coating disposed on a surface of an article to ultraviolet light at one or more preselected wavelengths causing said luminescent coating to exhibit a luminescence spectrum, the luminescence spectrum exhibiting a plurality of intensity peaks that have been predetermined to create a standard; determining the intensity of at least two peaks in the luminescence spectrum of the coating; determining a peak intensity ratio of the at least two peaks; comparing the peak intensity ratio determined with the standard; and, classifying the article according to whether or not the peak intensity ratio does or does not match the standard; wherein the luminescent coating is a particulate luminescent composition comprising a rare earth doped fluoride represented by the chemical formula REx(CaaSrbBac)1?xF2+x?2yOy wherein RE represents a three-valent rare-earth element, 0.005?x?0.20, and 0?y?0.

Abstract: Cerium oxide nanoparticles (CeONP) can be used to treat or prevent neurodegenerative diseases, including for example Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, AIDS-related dementia, ALS, progressive supranuclear palsy, and encephalitis, as well as mitochondrial diseases and diseases associated with mitochondrial damage. In particular, CeONP having an average size of about 2 nm to about 100 nm can be administered in an amount sufficient to block production of hydroxyl or superoxide radicals, block free radical production by A?(1-42), block A?(1-42)-induced neuronal death, block A?(1-42)-induced [Ca2+]i dysfunction in neurons, block A?(1-42)-induced lipid peroxidation, decrease loss of dopaminergic neurotransmission, or reduce mitochondrial dysfunction in a cell.

Abstract: Nano-scale yttrium-zirconium mixed oxide powder in the form of aggregated primary particles having the following physico-chemical parameters:—BET surface area: from 40 to 100 m2/g,—da=from 3 to 30 nm, d,=mean, number-related primary particle diameter,—yttrium content, calculated as yttrium oxide Y2O3, determined by chemical analysis, from 5 to 15 wt. %, based on the mixed oxide powder,—yttrium contents of individual primary particles, calculated as yttrium oxide Y2O3 determined by TEM EDX, corresponding to the content in the powder+?10%,—content at room temperature, determined by X-ray diffraction and based on the mixed oxide powder—monoclinic zirconium oxide from <1 to 10 wt. %—tetragonal zirconium oxide from 10 to 95 wt. %—the content of monoclinic zirconium oxide after 2 hours' heating at 1300° C. being less than 1 wt. %,—carbon content less than 0.2 wt. %.

Abstract: A hydrogen sensitive composite sensing material based on cerium oxide with or without additives to enhance sensitivity to hydrogen, reduce cross-sensitivities to interfering gases, or lower the operating temperature of the sensor, and a device incorporating these hydrogen sensitive composite materials including a support, electrodes applied to the support, and a coating of hydrogen sensitive composite material applied over the electroded surface. The sensor may have in integral heater. The sensor may have a tubular geometry with the heater being inserted within the tube. A gas sensor device may include a support, electrodes applied to the support, and a dual sensor element to cancel unwanted effects on baseline resistance such as those resulting from atmospheric temperature changes. The hydrogen sensitive composite material or other gas sensitive materials may be used in the dual element gas sensor device.

Abstract: Methods and associated structures of forming a microelectronic device are described. Those methods may include introducing a first metal source, a second metal source and an oxygen source into a chamber and then forming a ternary oxide film comprising a first percentage of the first metal, a second percentage of the second metal, and a third percentage of oxygen.

Abstract: Process for the production of a metal oxide powder having a BET surface area of at least 20 m2/g by reacting an aerosol with oxygen in a reaction space at a reaction temperature of more than 700° C. and then separating the resulting powder from gaseous substances in the reaction space, wherein the aerosol is obtained by atomisation using a multi-component nozzle of at least one starting material, as such in liquid form or in solution, and at least one atomising gas, the volume-related mean drop diameter D30 of the aerosol is from 30 to 100 ?m and the number of aerosol drops larger than 100 ?m is up to 10%, based on the total number of drops, and metal oxide powder obtainable by this process.

Abstract: A green light emitting phosphor and a light emitting device are provided. The green light emitting phosphor includes a composition represented by the formula Sr1.8-nMnEu0.2Si3O8.2SrCl2. M is at least one element selected from the group consisting of Ca, Ba, and Mg, and n is in a range of 0<n?1.0. The light emitting device includes a semiconductor light emitting element which emits ultraviolet or short-wavelength visible light; and the green light emitting phosphor.

Abstract: After synthesizing particles by liquid phase synthesis, the solution is substituted without drying these particles, and here, a solution comprising a grain boundary phase composition consisting of at least one or more types selected from a group consisting of Al2O3, yttrium oxide, silicon oxide, yttrium-silicon complex oxide, aluminum-silicon complex oxide, and a compound having a garnet structure with a lower melting point than the aforementioned particles, or a solution comprising a precipitate is introduced. Microparticles are adjusted by allowing adhesion and growth of the solution comprising a composition of grain boundary phase or the solution comprising a precipitate on the surface of the particles; these microparticles are allowed to align in 3-dimensions in solution and are formed into a molded body, and this molded body is sintered.

Abstract: To provide an yttria-stabilized zirconia sintered body having high hydrothermal deterioration resistance in addition to excellent thermal shock resistance. Methods for Achieving the Object A stabilized zirconia sintered body comprising yttria, wherein 1) the sintered body is substantially composed of monoclinic crystals and cubic crystals; and 2) an increase of the monoclinic crystals included in the sintered body is 10% by volume or less after the body is subjected to hydrothermal deterioration test for 5 hours, at 180° C., at 10 atmospheres.

Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu); contains the another elements.

Abstract: It is an object of the present invention to provide a magnetic garnet single crystal capable of reducing the optical loss of the resulting rotator even when the magnetic garnet single crystal is grown using a solvent containing Na by the liquid phase epitaxial process, as well as a Faraday rotator using the same. A magnetic garnet single crystal represented by the chemical formula Bi?Na?M13-?-?-?M2?Fe5-?-?Mg?M3?O12 (M1 is at least one element or more selected from Y, Eu, Gd, Tb, Dy, Ho, Yb and Lu; and M2 is at least one element or more selected from Ca and Sr; M3 is at least one element or more selected from Si, Ge, Ti, Pt, Ru, Sn, Hf and Zr, provided that 0.60<??1.50, 0<??0.05, 1.35<3??????<2.40, 0???0.10, 0???0.10, 0<??0.10, 0<?+??0.10, 0<?+??0.10).

Abstract: To provide an RE-based oxide superconducting sintered body that can be used as a target applicable to a laser ablation method without bonding it to a backing plate, and a manufacturing method of the same. Each kind of powder or solution is prepared, and when a composition formula of an RE-based oxide superconductor is expressed by REaBabCucOx, raw materials are weighed and mixed so as to satisfy a+b+c=6, 0.95<a<1.05 and 1.505?c/b<1.6, and thereafter calcinations, pulverization, sintering, pulverization, and molding are carried out to obtain the RE-based oxide superconducting sintered body, and this RE-based oxide superconducting sintered body is used as a laser ablation target.

Abstract: The present invention relates to a phosphor that satisfies requirements (1) to (3): (1) the phosphor satisfies Formula [2] and/or Formula [3]: 85?{R455(125)/R455(25)}×100<110??[2] 92?{R405(100)/R405(25)}×100<110??[3] wherein R455(125) represents an emission peak intensity when the phosphor is excited by light having a peak wavelength of 455 nm at 125° C., (2) the emission peak wavelength is in the range of 570 nm to 680 nm, and (3) the full width at half maximum of an emission peak is 90 nm or less. The phosphor of the present invention has a high luminous efficiency and emits light of orange to red with high luminance. The use of the phosphor makes it possible to produce a light-emitting device, an illumination apparatus, and an image display, having a high efficiency and excellent color rendering properties.

Abstract: This invention is related to magnetic nanoparticles of hydroxyapatite for biomedical applications and the preparation method thereof. The magnetic particles of hydroxyapatite are prepared by a wet chemical co-precipitation method at lower temperature, wherein the calcium ions originally existing in hydroxyapatite are replaced with divalent or trivalent metal ions, for example, Fe+2 ion, to form magnetic nanoparticles of hydroxyapatite.

Abstract: Magnetic nanoparticles are applicable in imaging, diagnosis, therapy, and biomaterial separation. The magnetic nanoparticles are represented as (FewGdx)vZy, wherein w is from 99.9% to 97.5%, x is from 0.1% to 2.5%, Z is an element of the group VIa, and v, y are positive numbers.

Abstract: A synthetic catalyst providing superoxide dismutase activity consists essentially of monodispersed nanoparticles of cerium oxide having a crystal lattice containing cerium in mixed valence states of Ce3+ and Ce4+ wherein the Ce4+ valence state predominates and containing an enhanced Ce3+/Ce4+ ratio and an effective number of oxygen vacancies in the crystal lattice so as to increase catalytic efficiency. A method of making the synthetic catalyst includes dissolving hydrous Ce(NO3)3 in water so as to form a solution, stirring the solution, adding hydrogen peroxide, heating and stopping when the solution develops a light yellow color.

Abstract: A nonlinear optical crystal having a chemical formula of YiLajAlkB16O48, where 2.8?i?3.2, 0.8?j?1.2, i and j sum to about four, and k is about 12 is provided. The nonlinear optical crystal is useful for nonlinear optical applications including frequency conversion. Nonlinear optical crystals in a specific embodiment are characterized by UV blocking materials (e.g., some transition metals and lanthanides) at concentrations of less than 1,000 parts per million, providing high transmittance over portions of the UV spectrum (e.g., 175-360 nm).

Abstract: A phosphor which emits light having high brightness, serves as an excellent orange or red phosphor whose light brightness is less decreased when exposed to an excitation source contains a crystal phase having the chemical composition expressed by the general formula [1]: (1?a?b)(Ln?pMII?1?pMIII?MIV?N3)·a(MIV?(3n+2)/4NnO)·b(AMIV?2N3)??[1] wherein Ln? represents a metal element selected from the group consisting of lanthanoids, Mn, and Ti; MnII? represents a divalent metal element except the Ln? element; MIII? represents a trivalent metal element; MIV? represents a tetravalent metal element; A represents a metal element selected from the group consisting of Li, Na, and K; 0<p?0.2; 0?a, 0?b, a+b>0, 0?n, and 0.002?(3n+2)a/4?0.9.

Abstract: Compositions and processes are disclosed for removing sulfur and sulfur compounds from hydrocarbon fuel feedstocks. The feedstock is contacted with a regenerable sorbent such as a compound of the formula TixCeyO2 where 0<x/y?1 and where 0<x?1 and 0<y?1 capable of selectively adsorbing sulfur compounds present in the hydrocarbon feedstock at about 0° C. to about 100° C. such as at about 25° C.

Abstract: Rare earth compositions comprising nanoparticles are described along with various nanotechnology applications of such nanoparticles. The compositions of the nanomaterials discussed may include scandium (Sc), yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).

Abstract: An aqueous colloidal dispersion of at least one lanthanide compound and a complexing agent with a pK (cologarithm of the dissociation constant of the complex formed by the complexing agent and the lanthanide cation) or more than 2.5. The dispersion can also include a compound of at least one other element selected from groups IVa, Va, VIIa, VIIa, VIII, Ib and IIb of the periodic table. A process for preparing the dispersion starts by forming an aqueous mixture comprising at least one lanthanide salt, optionally a salt of one of the elements mentioned, and the complexing agent. A base is added to the mixture, which is heated to obtain the dispersion. Methods that use the dispersion are also disclosed.

Abstract: The present invention provides a novel aluminate phosphor capable of emitting blue fluorescence having high color purity and high brightness in a certain wavelength range by ultraviolet ray excitation and electron beam excitation, and a useful production method thereof. The method for producing an aluminate phosphor according to the present invention is characterized in comprising a step of heating an aluminate represented by a composition formula: 7(Sr1-xEux)O.yAl2O3 [wherein, x and y satisfy 0<x?0.5 and 1?y?36] in a state of being in contact with magnesium oxide in a reducing atmosphere.

Abstract: Disclosed is a catalyst for methanation reaction producing methane with high conversion by reaction of hydrogen with carbon dioxide, or a gas mixture of carbon dioxide and carbon monoxide, or a gas mixture containing these compounds as the main components. The catalyst is prepared by the steps of mixing (A) aqueous zirconia sol with salts of (B) stabilizing element(s), which is selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ca and Mg, and (C) iron group element(s), drying and calcining the mixture to obtain a catalyst precursor, and subsequent reduction of the precursor. The catalyst comprises, by atomic %, A: 18-70%, B: 1-20% and C: 25-80% based on the elemental states of the metals. The catalyst is characterized by multiple oxide of tetragonal zirconia structure, in which not only the stabilizing element(s) but also a part of the iron group element(s) is incorporated, and on which the iron group element(s) in the metallic state is supported.

Abstract: The invention concerns a material comprising a compound of formula Pr(1-x-y)LnyCexX3 wherein—Ln is chosen from the elements or mixtures of at least two elements, of the group: La, Nd, Pm, Sm, Eu, Gd, Y, —X is chosen from the halides or mixtures of at least two halides, of the group: Cl, Br, I, —x is above 0.0005 and is lower than 1, —y is from 0 to less than 1 and—x+y) is less than 1, and its use as scintillation detector, for example in PET scanner with time of flight apabilities.

Abstract: The present invention relates to a process for preparing essentially isometric nanoparticulate lanthanide-boron compounds or solid mixtures comprising essentially isometric nanoparticulate lanthanide-boron compounds, which comprises a) mixing i) one or more lanthanide compounds selected from the group consisting of lanthanide hydroxides, lanthanide hydrides, lanthanide chalcogenides, lanthanide halides, lanthanide borates and mixed compounds of the lanthanide compounds mentioned, ii) one or more compounds selected from the group consisting of crystalline boron, amorphous boron, boron carbides, boron hydrides and boron halides and iii) if appropriate one or more reducing agents selected from the group consisting of hydrogen, carbon, organic compounds, alkaline earth metals and alkaline earth metal hydrides dispersed in an inlet carrier gas with one another, b) reacting the mixture of the components i), ii) and, if appropriate, iii) in the inert solvent by means of thermal treatment within a reaction zone,

Abstract: The invention relates to a process for manufacturing compounds based on one or more silicates of alkali metals and/or of alkaline-earth metals, optionally in the form of mixed silicates that combine at least two of these elements, said process involving: (i) preferably a conversion reaction (1) in which halides of said alkali metals and/or of said rare earths and/or of said alkaline-earth metals are converted into the corresponding sulfates; (iii) a conversion reaction (2) in which said sulfates together with silica are converted into the corresponding silicates, the heat supply needed for this conversion being provided, at least in part, by a combustion reaction (3) using a submerged burner or a plurality of submerged burners.

Abstract: The present invention provides a cerium oxide-based abrasive ensuring high removal rate, less generation of scratches, high-precision polished surface with small surface roughness, and a safe, simple and low-cost production process. Further, the present invention provides a method for producing such an abrasive. The method of the present invention comprises (a) adding a precipitant to an aqueous cerium-containing light rare-earth salt solution to precipitate a light rare-earth salt, thereby obtaining a first slurry containing a light rare-earth salt particle; (b) adding a fluorinating agent to a slurry containing a light rare-earth salt particle to react the light rare-earth salt with the fluorinating agent, thereby obtaining a second slurry containing a light rare-earth fluoride particle; (c) mixing the first slurry and the second slurry to obtain a mixed slurry; and (d) drying and firing the mixed slurry, and a cerium oxide-based abrasive obtained by this method.

Abstract: To provide a green phosphor with high conversion efficiency of blue of near-ultraviolet light and excellent color purity, a multinary oxynitride phosphor represented by the general formula [I] is proposed. M1xBayM2zLuOvNw??[I] In the formula [I], M1 represents Cr, Mn, Fe, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb, M2 represents Sr, Ca, Mg and Zn, L represents metal elements belonging to the fourth group or the fourteenth group of the periodic table, and x, y, z, u, v and w are the numeric values in the following ranges: 0.00001?x?3 0?y?2.99999 2.6?x+y+z?3 0<u?11 6<v?25 0<w?17.