Abstract: The invention concerns a solution of tungstate ions W6+ (VI) comprising as solvent at least one optionally partly etherified polyalcohol, a preparation method and uses thereof. The invention further concerns a layer comprising at least one tungsten oxide WOz comprising one or more polyoxotungstate complexes, methods for preparing the same and uses thereof, and in particular a photovoltaic device comprising said layer of material.

Abstract: Metal halide optical materials (e.g., scintillator materials or persistent phosphors) are described. More particularly, the optical materials include codoped perovskite-type halides, wherein the codoping ion is present at a molar ratio of 5000 parts per million (ppm) or less with respect to all cations. For example, the optical material can be a codoped trihalide having the formula ABX3 where A is one or more alkali metal, B is one or more alkali earth metal, and X is one or more halide that is doped with up to about 10 atomic percent of a dopant ion and codoped with up to about 5000 ppm of one or more isovalent or aliovalent codopant ion, such as a tetravalent ion (e.g., Zr4+), a trivalent ion (e.g., Sc3+, Y3+, Gd3+, or La3+ ion) or a divalent ion (e.g., Mg2+). The codoped material can have modified afterglow compared to a noncodoped material.

Abstract: An oxygen evolution reaction (OER) electrocatalyst for acidic media comprises a metal oxide structure comprising a pyrochlore phase of chemical formula A2B2On, wherein A comprises one or more A-site metals, B comprises one or more B-site metals, and 6.0?n?7.3. The metal oxide structure exhibits a mass current density of at least about 20 A/g at an over-potential of 0.22 V in 0.1 M HClO4. According to another embodiment, an electrocatalyst for acidic media comprises a porous metal oxide structure having particulate walls separating a plurality of pores, where each particulate wall comprises interconnected primary particles. The porous metal oxide structure comprises a pyrochlore phase of chemical formula A2B2On, wherein A comprises one or more A-site metals, B comprises one or more B-site metals, and 6.0?n?7.3.

Abstract: An oxide sputtering target includes at least one of indium (In), zinc (Zn), tin (Sn), and gallium (Ga), and tungsten (W) in an amount from 0.005 mol % to 1 mol %.

Abstract: An object of the present invention is to provide an infrared-shielding nanoparticle dispersion that has a property whereby visible light is adequately transmitted, and light in the near-infrared region is adequately shielded; an infrared-shielding body manufactured using the infrared-shielding nanoparticle dispersion; a method for manufacturing infrared-shielding nanoparticles that are used in the infrared-shielding nanoparticle dispersion; and infrared-shielding nanoparticles manufactured using the method for manufacturing infrared-shielding nanoparticles.

Abstract: The present invention provides a process for preparation of Ag-W oxide catalyst for the direct and selective conversion of propylene to propylene oxide. The process provides a direct single step selective vapour phase oxidation of propylene to propylene oxide using molecular oxygen over Ag-W oxide catalysts. The process provides propylene conversion of 10-50% and selectivity for propylene oxide up to 100%.

Abstract: A template-free reverse micelle (RM) based method is used to synthesize pyrochlore nanostructures having photocatalytic activity. In one embodiment, the method includes separately mixing together a first acid stabilized aqueous solution including pyrochlore precursor A and a second acid stabilized aqueous solution including pyrochlore precursor B with an organic solution including a surfactant to form an oil-in-water emulsion. Next, equimolar solutions of the first and second acid stabilized oil-in-water emulsions are mixed together. Then, the mixture of the first and second acid stabilized oil-in-water emulsion is treated with a base to produce a precipitate including pyrochlore precursors A and B. After which, the precipitate is dried to remove volatiles. The precipitate is then calcined in the presence of oxygen to form a pyrochlore nanostructure, such as a bismuth titanate (Bi2Ti2O7) pyrochlore nanorod. The method of synthesizing the pyrochlore nanorod is template-free.

Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.

Abstract: In one embodiment, an aqueous dispersion liquid contains at least one particles selected from tungsten oxide particles and tungsten oxide composite particles. A mean primary particle diameter (D50) of the particles is in the range of 1 nm to 400 nm. In the aqueous dispersion liquid, concentration of the particles is in the range of 0.1 mass % to 40 mass %, and pH is in the range of 1.5 to 6.5. The aqueous dispersion liquid excels in dispersibility of particles and capable of maintaining good liquidity for a long period.

Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.

Abstract: The invention relates to a catalyst containing alkali tungstate for the synthesis of alkylmercaptanes from alkanols and hydrogen sulphide, in addition to a method for the production of said catalyst, wherein the molar ratio of alkali to tungstan is <2:1.

Abstract: There is provided infrared shielding nanoparticles having excellent water-resistant property and excellent infrared shielding property, which is the infrared shielding nanoparticles of composite tungsten oxide expressed by a general formula WyOz and/or a general formula MxWyOz, with an average primary particle size of the nanoparticle being 1 nm or more and 800 nm or less, and a surface of the nanoparticle being coated with tetrafunctional silane compound or its hydrolysis product and/or an organic metal compound.

Abstract: A new type of solid acid catalyst, which promises better catalytic performance than conventionally prepared supported metal oxides due to its precisely synthesized nanostructure has been described. The catalyst is nanoparticulate in form and is comprised of monolayers of tungstated zirconia of the formula, WOxZryO4-2y made by impregnating a support with zirconium and tungsten. The support catalyst is further characterized in having a tugsten monolayer between greater than 0001 W/nm2 to about 30 W/nm2.

Abstract: The invention is directed to ammonium paratungstate decahydrate containing at least 75% of crystals having a length of at least 200 ?m and having a ratio of length to width of less than 4.5:1.

Abstract: A method for producing ammonium metatungstate from ammonium paratungstate includes preparing an ammonium paratungstate mixture including solid ammonium paratungstate and water. The mixture is contacted with a cation exchange material to lower a pH of the mixture to a pH range wherein metatungstate ion is stable and an insoluble tungstic acid is not formed. The pH of the mixture may be maintained in the pH range until the ammonium paratungstate mixture is converted into an ammonium metatungstate solution.

Abstract: A process for preparing ammonium metatungstate using ammonium paratungstate as raw material comprising: (A) leaching wet ammonium paratungstate with nitric acid to obtain a dilute solution of ammonium metatungstate; (B) concentrating the dilute solution of ammonium metatungstate to be a concentrated solution of ammonium metatungstate; and (C) spray-drying the concentrated solution of ammonium metatungstate to obtain powder of ammonium metatungstate.

Abstract: An optical information recording medium includes a recording layer capable of recording information signals on the basis of application of light, wherein the recording layer contains an oxide of metal X and an oxide of metal Y, the metal X is at least one type selected from the group consisting of tungsten and molybdenum, and the metal Y is at least one type selected from the group consisting of copper, manganese, nickel, and silver.

Abstract: A pyrochlore-type oxide represented by a general formula A2B2O7-Z is prepared by precipitate formation, where A and B each represent a metal element, where Z represents a number of at least 0 and at most 1, where A contains at least one element selected from a group consisting of Pb, Sn, and Zn, and where B contains at least one element selected from a group consisting of Ru, W, Mo, Ir, Rh, Mn, Cr, and Re. Impurities are then sufficiently removed through washing and drying processes, and the pyrochlore-type oxide is calcined under controlled conditions. This allows the crystallinity of the pyrochlore-type oxide, which contained amorphous parts immediately after the production of the precipitate, to be increased so that the resistance to acid can be improved while preventing particle aggregation.

Abstract: The invention relates to a catalyst containing alkali tungstate for the synthesis of alkylmercaptanes from alkanols and hydrogen sulphide, in addition to a method for the production of said catalyst, wherein the molar ratio of alkali to tungsten is <2:1.

Abstract: Disclosed is an oxide for a semiconductor layer of a thin film transistor, which, when used in a thin film transistor that includes an oxide semiconductor in the semiconductor layer, imparts good switching characteristics and stress resistance to the transistor. Specifically disclosed is an oxide for a semiconductor layer of a thin film transistor, which is used for a semiconductor layer of a thin film transistor and contains at least one element selected from the group consisting of In, Ga and Zn and at least one element selected from the group X consisting of Al, Si, Ni, Ge, Sn, Hf, Ta and W.

Abstract: A method for producing an ammonium tungstate aqueous solution includes the steps of: adding sulfuric acid to a solution containing tungstate ions; bringing the solution having the sulfuric acid added therein, into contact with an anion exchange resin; and bringing the anion exchange resin into contact with an aqueous solution containing ammonium ions.

Abstract: The present invention provides a method for preparing a pyrochlore type oxide having a larger specific surface area, a polymer electrolyte fuel cell and a fuel cell system improved in power generation efficiency and capable of being produced more inexpensively, and a method for producing an electro catalyst for a fuel cell, which electro catalyst has a larger specific surface area, is relatively inexpensive, and has high electrode activity per unit mass. A method for preparing a pyrochlore type oxide represented by A2B2O7-Z wherein A and B represent a metal element, Z represents a number of 0 or more and 1 or less, A includes at least one selected from the group consisting of Pb, Sn, and Zn, and B includes at least one selected from the group consisting of Ru, W, Mo, Ir, Rh, Mn, Cr, and Re, wherein the pyrochlore type oxide is produced by a reaction of a halide or nitrate of A with an alkali salt of a metal acid of B.

Abstract: The present invention relates to (i) a plant growth-improving agent containing a growth-improving component that increases a concentration of an oxoanion in an area around a plant, the oxoanion being heavier than a sulfate ion and containing four oxygen atoms, (ii) a seed to which such a plant growth-improving agent has been applied, and (iii) a plant growth-improving method including a cultivating step of growing a plant in the presence of such a growth-improving component.

Abstract: Disclosed herein is a method for preparing a near infrared absorbing agent. The method includes admixing tungsten trioxide and a reducing agent in water and allowing for a partial reduction of the tungsten trioxides to yield the near infrared absorbing agent.

Abstract: In one embodiment, an aqueous dispersion liquid contains at least one particles selected from tungsten oxide particles and tungsten oxide composite particles. A mean primary particle diameter (D50) of the particles is in the range of 1 nm to 400 nm. In the aqueous dispersion liquid, concentration of the particles is in the range of 0.1 mass % to 40 mass %, and pH is in the range of 1.5 to 6.5. The aqueous dispersion liquid excels in dispersibility of particles and capable of maintaining good liquidity for a long period.

Abstract: The invention is directed to a method for the production of ammonium paratungstate tetrahydrate by thermal treatment of ammonium paratungstate decahydrate in an aqueous suspension. The ammonium paratungstate tetrahydrate can be produced with high purity and high yield. The production method may furthermore be carried out in a simple and energy-efficient manner.

Abstract: The invention is directed to a process for the continuous preparation of ammonium paratungstate hydrate by back reextraction of a tungsten-laden organic phase with an ammonia-containing aqueous solution in a mixer-settler apparatus. The reextraction is carried out at an NH3:W molar ratio of from 0.83 to 1.30, and a volume feed ratio of the tungsten-laden organic phase to the ammonia-containing aqueous solution of from 5 to 25. The above crystalline is in high purity and in high yield. The production method can be carried out in a simple and energy-efficient manner.

Abstract: A process for preparing ammonium metatungstate using ammonium paratungstate as raw material comprising: (A) leaching wet ammonium paratungstate with nitric acid to obtain a dilute solution of ammonium metatungstate; (B) concentrating the dilute solution of ammonium metatungstate to be a concentrated solution of ammonium metatungstate; and (C) spray-drying the concentrated solution of ammonium metatungstate to obtain powder of ammonium metatungstate.

Abstract: The invention is directed to a method for the production of ammonium paratungstate tetrahydrate by thermal treatment of ammonium paratungstate decahydrate in an aqueous suspension. The ammonium paratungstate tetrahydrate can be produced with high purity and high yield. The production method may furthermore be carried out in a simple and energy-efficient manner.

Abstract: The invention relates to a cutting tool having a substrate base body and a single or multi-layered coating attached thereupon, wherein at least one layer of the coating is a metal oxide layer produced in the PVD process or in the CVD process and the metal oxide layer has a grain structure wherein there is structural disorder within a plurality of the existing grains that are characterized in that in electron diffraction images of the grains, point-shaped reflections occur up to a maximum lattice spacing dGRENZ and for lattice spacing greater than dGRENZ no point-shaped reflections occur, but rather a diffuse intensity distribution typical for amorphous structures.

Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.

Abstract: The invention relates to a process for recovering Group VIB metals from a catalyst, in particular a spent bulk catalyst, comprising one or more Group VIB metals and one or more Group VIII metals. Further, the invention relates to a solid Group VIB metal compound obtainable by the process according to the invention having the general formula H2XO4, wherein X=W1-yMoy, wherein y is between 0 and 1 and to its use in a process for the manufacture of a fresh catalyst.

Abstract: Process for preparing a mixed metal oxide powder, in which oxidizable starting materials are evaporated and oxidized, the reaction mixture is cooled after the reaction and the pulverulent solids are removed from gaseous substances, wherein as starting materials, at least one pulverulent metal and at least one metal compound, the metal and the metal component of the metal compound being different and the proportion of metal being at least 80% by weight based on the sum of metal and metal component from metal compound, together with one or more combustion gases, are fed to an evaporation zone of a reactor, where metal and metal compound are evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the starting materials and combustion gases completely.

Abstract: The present invention provides a metal component collection agent for collecting one or more metal components from a metal component-containing material; the agent containing, as an active ingredient, a compound containing one or more group 2 elements of the periodic table, or a compound containing one or more lanthanoid elements. The present invention further provides a method for collecting one or more metal components from a metal component-containing material; the method comprising heating the metal component-containing material and the metal component collection agent in such a manner that a metal vapor or metal oxide vapor produced by heating the metal component-containing material is brought into contact with the metal component collection agent. According to the present invention, metal components can be easily and efficiently collected from materials containing highly useful metal components such as noble or rare metal.

Abstract: Titanium oxide (usually titanium dioxide) catalyst support particles are doped for electronic conductivity and formed with surface area-enhancing pores for use, for example, in electro-catalyzed electrodes on proton exchange membrane electrodes in hydrogen/oxygen fuel cells. Suitable compounds of titanium and a dopant are dispersed with pore-forming particles in a liquid medium. The compounds are deposited as a precipitate or sol on the pore-forming particles and heated to transform the deposit into crystals of dopant-containing titanium dioxide. If the heating has not decomposed the pore-forming particles, they are chemically removed from the, now pore-enhanced, the titanium dioxide particles.

Abstract: The invention relates to a halide-containing alkali tungstate catalyst for the synthesis of alkylmercaptans from alkanols and hydrogen sulfide, and to a process for the preparation of this catalyst.

Abstract: A method of manufacturing a complex metal oxide powder, the method including: preparing a raw material composition for forming a complex metal oxide; mixing an oxidizing solution including an oxidizing substance into the raw material composition to produce complex metal oxide particles to obtain a liquid dispersion of the particles; and separating the particles from the liquid dispersion to obtain a complex metal oxide powder. The complex metal oxide is shown by a general formula AB1?xCxO3, an element A including at least Pb, an element B including at least one of Zr, Ti, V, W, and Hf, and an element C including at least one of Nb and Ta.

Abstract: A tungstate-based scintillating material and a method for using a tungstate-based scintillating material is provided. In addition, a radiation detector and an imaging device incorporating a tungstate-based scintillating material are provided.

Abstract: A method for the production of a nanocrystalline molybdenum mixed oxide, the use of the molybdenum mixed oxide as catalyst for chemical conversions, in particular for a conversion of acrolein to acrylic acid as well as a catalyst that contains the molybdenum mixed oxide.

Abstract: The invention is directed to a method for the production of ammonium paratungstate tetrahydrate by thermal treatment of ammonium paratungstate decahydrate in an aqueous suspension. The ammonium paratungstate tetrahydrate can be produced with high purity and high yield. The production method may furthermore be carried out in a simple and energy-efficient manner.

Abstract: A process of producing a ceramic powder including providing a plurality of precursor materials in solution, wherein each of the plurality of precursor materials in solution further comprises at least one constituent ionic species of a ceramic powder, combining the plurality of precursor materials in solution with an onium dicarboxylate precipitant solution to cause co-precipitation of the ceramic powder precursor in a combined solution; and separating the ceramic powder precursor from the combined solution. The process may further include calcining the ceramic powder precursor.

Abstract: A sol-gel process for preparing a mixture of metal-oxide-metal compounds wherein at least one metal oxide precursor is subjected to a hydrolysis treatment to obtain one or more corresponding metal oxide hydroxides, the metal oxide hydroxides so obtained are subjected to a condensation treatment to form the metal-oxide-metal compounds, which process is carried out in the presence of an encapsulated catalyst, whereby the catalytically active species is released from the encapsulating unit by exposure to an external stimulus, and wherein the catalytically active species released after exposure to such external stimulus is capable of catalyzing the condensation of the metal-hydroxide groups that are present in the metal oxide hydroxides so obtained.

Abstract: A method for producing ammonium metatungstate from ammonium paratungstate includes preparing an ammonium paratungstate mixture including solid ammonium paratungstate and water. The mixture is contacted with a cation exchange material to lower a pH of the mixture to a pH range wherein metatungstate ion is stable and an insoluble tungstic acid is not formed. The pH of the mixture may be maintained in the pH range until the ammonium paratungstate mixture is converted into an ammonium metatungstate solution.

Abstract: The invention relates to a process for converting an alkaline-earth metal chloride to at least one salt chosen from the tungstates and molybdates of this metal, which comprises the reaction of the alkaline-earth metal chloride with at least one precursor of tungsten or of molybdenum chosen from tungsten oxides, molybdenum oxides, tungstates and molybdates, this reaction being carried out in a solvent constituted by KCl or by an LiCl/KCl mixture and at a temperature at least equal to the melting point of this solvent. Applications: synthesis of alkaline-earth metal tungstates and molybdates, extraction of alkaline-earth metals from media in which they are found in the form of chlorides, recovery of alkaline-earth fission products from a salt flux in the context of the reprocessing of a spent nuclear fuel in molten chloride media, etc.

Abstract: The present disclosure provides a solid dopant for doping a conductive polymer, which has a high dispersibility in a solvent by a plasma treatment, a method and an apparatus for preparing the solid dopants, a solid doping method of a conductive polymer using the solid dopants, and a solid doping method of a conductive polymer using plasma.

Abstract: The invention relates to a catalyst containing alkali tungstate for the synthesis of alkylmercaptanes from alkanols and hydrogen sulphide, in addition to a method for the production of said catalyst, wherein the molar ratio of alkali to tungstan is <2:1.

Abstract: A method for producing ammonium metatungstate from ammonium paratungstate includes preparing an ammonium paratungstate mixture including solid ammonium paratungstate and water. The mixture is contacted with a cation exchange material to lower a pH of the mixture to a pH range wherein metatungstate ion is stable and an insoluble tungstic acid is not formed. The pH of the mixture may be maintained in the pH range until the ammonium paratungstate mixture is converted into an ammonium metatungstate solution.

Abstract: A filter material for generating oxygen and/or hydrogen gas from a source having a porous boron doped carbon film with diruthenium/diruthenium molecules in direct contact with the porous boron doped carbon film, a synthetic film having at least one zeolite crystalline body in direct contact with the nanocarbon tubules, or both in a continuous alternating arrangement.

Abstract: The invention relates to a catalyst containing alkali tungstate for the synthesis of alkylmercaptanes from alkanols and hydrogen sulphide, in addition to a method for the production of said catalyst, wherein the molar ratio of alkali to tungstan is <2:1.

Abstract: Nanocrystalline forms of metal oxides, including binary metal oxide, perovskite type metal oxides, and complex metal oxides, including doped metal oxides, are provided. Methods of preparation of the nanocrystals are also provided. The nanocrystals, including uncapped and uncoated metal oxide nanocrystals, can be dispersed in a liquid to provide dispersions that are stable and do not precipitate over a period of time ranging from hours to months. Methods of preparation of the dispersions, and methods of use of the dispersions in forming films, are likewise provided. The films can include an organic, inorganic, or mixed organic/inorganic matrix. The films can be substantially free of all organic materials. The films can be used as coatings, or can be used as dielectric layers in a variety of electronics applications, for example as a dielectric material for an ultracapacitor, which can include a mesoporous material. Or the films can be used as a high-K dielectric in organic field-effect transistors.