Abstract: A production method of amorphous silica comprises a step of preparing organic waste containing silicon oxide as a starting material, a step of immersing the organic waste in a carboxylic acid aqueous solution having a hydroxyl group, a step of washing the organic waste in water, and a step of heating the organic waste in the air atmosphere.

Abstract: A process is disclosed for the production of acidic solutions of activated silica for water treatment. Activated silica is formed during the process of acidifying a sodium silicate solution to below pH 4 with sulfuric acid. A polyvalent metal salt is then added to stabilize the acidified activated silica.

Abstract: Disclosed herein is a method for preparing a porous material using nanostructures. The method comprises the steps of producing nanostructures using a porous template, dispersing the nanostructures in a source or precursor material for the porous material, aligning the nanostructures in a particular direction, and removing the nanostructures by etching. According to the method, the size, shape, orientation and regularity of pores of the porous material can be easily controlled, and the preparation of the porous material is simplified, leading to a reduction in preparation costs. Further disclosed is a porous material prepared by the method.

Abstract: An aggregate of mesoporous microparticles that comprises two or more of covalently bound mesoporous microparticles is described. The aggregate of mesoporous microparticles can be used for many applications, including slowing or reversing desertification.

Abstract: Micelle-templated superficially porous particles having a solid core and an outer porous shell with ordered pore structures and a narrow particle size distribution, such as about ±5% (one sigma), and a high specific surface area of about 5 to about 1000 m2/g.

Abstract: A filler for a dental resin composition is disclosed, comprising silica particles derived from a nanoparticulate silica sol, the filler material having at least one crystalline phase. The filler material provides improved wear resistance and other properties.

Abstract: An amorphous silica suitable for use in a dental composition has a weight mean particle size in the range 3 to 15 ?m with at least 90 per cent by weight of particles having a size below 20 ?m, a Radioactive Dentine Abrasion (RDA) determined on an aqueous slurry of the silica powder of 100 to 220, a Pellicle Cleaning Ratio (PCR), when incorporated in a dental composition at 10 per cent by weight, greater than 85, the ratio of PCR to RDA being in the range 0.4:1 to less than 1:1 and having a Plastics Abrasion Value (PAV) in the range 11 to 19. A silica having the above properties is prepared by a precipitation route. The silica made available by the invention is also useful as an anti-blocking agent in plastics.

Abstract: Stable high strength porous metal oxide articles suitable, for example, for use as catalyst supports, are prepared by predisposing fine metal oxide particles in water followed by fine dispersion under high shear, and subjecting the dispersion to a change in pH to coagulate the metal oxide particles and form a moldable viscoelastic composition. The moldings are substantially free of impurity atoms.

Abstract: The present invention provides novel plasma sources useful in the thin film coating arts and methods of using the same. More specifically, the present invention provides novel linear and two dimensional plasma sources that produce linear and two dimensional plasmas, respectively, that are useful for plasma-enhanced chemical vapor deposition. The present invention also provides methods of making thin film coatings and methods of increasing the coating efficiencies of such methods.

Abstract: A continuous process and related system for producing high purity silica are disclosed. The process and system utilize a unique high temperature rotary reactor which excludes oxygen. The use of one or more anoxic gases is described, that upon administration into the system promote the exclusion of oxygen.

Abstract: An aluminum complex hydroxide salt having Al oxide octahedral layers and a divalent anion among the octahedral layers, wherein an aluminosilicate anion expressed by the following general formula (1), [NapAlqSirOz]2???(1) wherein p, q, r and z are positive numbers satisfying, 5?z?20, z=(p/2)+(3q/2)+2r+1, 0<p/q<1, 0.01?q/r?1 is, at least, contained as the divalent anion. The aluminum complex hydroxide salt can be favorably used as a compounding agent for resins, and exhibits excellent heat retaining property as well as excellent transparency particularly when it is mixed as a heat retaining agent into films for agricultural use.

Abstract: A method of preparing channel-type mesoporous material with an elliptical pore section is described. An alkaline solution containing two surfactants different in the electronic properties of their hydrophilic groups is prepared. A silica precursor is added to form a stack of rod-like micelles each having an elliptical section with the silica precursor between the rod-like micelles. The silica precursor is reacted into a silica framework. The rod-like micelles are removed from the silica framework.

Abstract: A channel-type mesoporous material with an elliptical pore section has a 2D-rectangular pore arrangement. Besides, the channel-type mesoporous material includes silica and has a unit cell ratio a/b satisfying the inequality of ?{square root over (3)}<a/b?2.85. The synthesis procedure can be easily applied to prepare functional mesoporous silica materials, and examples given in this application are the syntheses of cyanoethyl-functionalized and mercaptopropyl-functionalized mesoporous materials with a c2mm symmetry. The mesoporous materials discussed herein have great potential for various advanced applications in the fields of catalysis, selective adsorption, controlled drug delivery and release, and many of other applications.

Abstract: Disclosed herein are a method of reductively bleaching a mineral slurry comprising adding in the mineral slurry an effective amount of a formamidine sulfinic acid (FAS) and an effective amount of a borohydride to reductively bleach the mineral slurry, compositions comprising a mineral slurry, a FAS, and a borohydride, and final products comprising a mineral obtained by the method disclosed herein.

Abstract: A transparent porous SiO2 coating for a transparent substrate material, for example polycarbonate, has advantageous antireflective properties. The coating is produced by a sol-gel process, at least one component which causes porosity being present during at least part of the sol-gel process and being removed and/or destroyed after the sol-gel process has ended. The at least one component which causes porosity is a polymer, the average molar mass of the polymer being preferably =5000 Da to =50 000 Da, more preferably =10 000 Da to =20 000 Da.

Abstract: A method of forming on a substrate an amorphous silica-based coating film having a low dielectric constant of 3.0 or below and a film strength (Young's modulus) of 3.0 GPa or more, which comprises, as a typical one, the steps of; (a) coating on the substrate a liquid composition containing hydrolysate of an organic silicon compound or compounds hydrolyzed in the presence of tetraalkylammonium hydroxide (TAAOH); (b) setting the substrate in a chamber and then drying a coating film formed on the substrate at a temperature in the range from 25 to 340° C.; (c) heating the coating film at a temperature in the range from 105 to 450° C. with introduction of a superheated steam having such a temperature into the chamber, and (d) curing the coating film at a temperature in the range from 350 to 450° C. with introduction of a nitrogen gas into the chamber.

Abstract: The invention discloses and claims a new class of chemical compositions with ideal sunscreen properties. The chemical composition comprises spherical particles between 200 nm and 10 microns in diameter prepared by an emulsion polymerization of tetraalkoxysilanes or organotrialkoxysilanes or organobridged trialkoxysilanes with a dye monomer bearing two or more alkoxysilyl groups attached to the bridging chromophore. The resulting spheres absorb ultraviolet light. The dye can be any organic chromophore capable of receiving multiple trialkoxysilyl groups resulting in multipoint covalent attachment that precludes leaching of the dye from the spheres. The formic acid-toluene-monomer emulsion polymerization allows for large-scale (>100 gram) synthesis of monodisperse particles under acidic, non-aqueous conditions without surfactants. The particles less than 1 micron in diameter are smooth as talc to the touch and will provide a smooth formulation for sunscreen creams or lotions.

Abstract: Pelletized silica particles characterized by a round shape and a monomodal particle size distribution are produced by dispersing silica particles into water, adding water to the dispersion, mixing with alkoxisilane, pouring the mixture into an organic solvent, filtering and washing the silica particles obtained. The pelletized silica particles can be used to produce glass monoliths.

Abstract: Silicon-containing products, such as silicon, silicon carbide and silicon nitride, containing less than 0.01 weight percent total mineral impurities and selectively determined carbon-to-silicon ratios. The products are derived from plant matter, such as rice hulls and rice straw, containing at least three weight percent silica. Methods are provided for making such high purity silicon-containing products by leaching silica-containing plant matter with aqueous sulfuric acid under controlled temperatures, pressures and reaction times to remove minerals and metals while adjusting the mole ratio of fixed carbon to silica, and then thermally treating under controlled conditions to produce the desired product.

Abstract: Fumed silica for use as auxiliary substance in pharmaceutical and cosmetic compositions, which has—a BET surface area of 90 to 400 m2/g—a content of As, Cd, Cr, Pb, Sb and Se of less than 1 ppm for each elements and less than 5 ppm of Hg, all elements determined by Inductively Coupled Plasma—Atomic Emission Spectroscopy (ICP-AES) or Atomic Absorption Spectroscopy (AAS).

Abstract: Use of pyrogenic metal oxide for the manufacture of a selfcompacting composition comprising hydraulic binders and having high early strength, the composition comprising at least one hydraulic binder and water as further constituents and the product of the BET surface area, in m2/g, of the pyrogenic metal oxide and the proportion by weight of the pyrogenic metal oxide based on the hydraulic binder being 20 to 200 m2/100 g of hydraulic binder.

Abstract: A protective coating sustains the long term performance of a solid-state hydrogen sensor that includes a catalyst layer for promoting the electrochemical dissociation of hydrogen. The catalyst is susceptible to deterioration in the presence of at least one contaminant, including carbon monoxide, hydrogen sulfide, chlorine, water and oxygen. The coating comprises at least one layer of silicon dioxide having a thickness that permits hydrogen to diffuse to the catalyst layer and that inhibits contaminant(s) from diffusing to the catalyst layer. The preferred coating further comprises at least one layer of a hydrophobic composition, preferably polytetrafluoroethylene, for inhibiting diffusion of water through the protective coating to the catalyst layer. The preferred protective coating further comprising at least one layer of alumina for inhibiting diffusion of oxygen through the protective coating to said catalyst layer.

Abstract: The instant invention relates to a process for the preparation of an aqueous suspension of anionic colloidal silica having a neutral pH which is stable over time and comprises individualized particles of colloidal silica which are not bound to one another by siloxane bonds. The instant suspensions show high storage stability and are particularly useful for the clarification of beer, for the preparation of cosmetic formulations, for the production of ink for printers, for paints and for anticorrosive treatments.

Abstract: The present invention relates to a highly dispersible silica which has a high surface area, a process to manufacture the aforesaid silica and its use as a tire filler for utility vehicles, motor cycles and high speed vehicles.

Abstract: Structures and methods for the fabrication of ceramic nanostructures. Structures include metal particles, preferably comprising copper, disposed on a ceramic substrate. The structures are heated, preferably in the presence of microwaves, to a temperature that softens the metal particles and preferably forms a pool of molten ceramic under the softened metal particle. A nano-generator is created wherein ceramic material diffuses through the molten particle and forms ceramic nanostructures on a polar site of the metal particle. The nanostructures may comprise silica, alumina, titania, or compounds or mixtures thereof.

Abstract: An ambient pressure, low cycle time method for the synthesis and manufacture of a low cost, highly insulting, highly translucent, and low density transition metal-based hydrophilic and hydrophobic nanogel. The important aspects are the method of synthesis, the stage of imparting hydrophobicity, and the process of manufacture. The method comprises the steps of mixing a chilled precursor solution with a chilled catalyst solution such that the mixture has a pH of between 9.5 and 12.2. The mixture is maintained at a temperature of 34° F.-55° F. for between 1 and 120 minutes to form a gel. The gel is silated the gel for about 120 minutes, washed in a wash fluid, then dried and annealed to form the aerogel.

Abstract: By using a halogen-free siloxane and an organometallic compound containing at least one metal other than silicon as feed stocks, and simultaneously atomizing and burning them in a flame, spherical particles of silica-containing compound oxide are prepared which are substantially halogen-free, consist of 0.5-99% by weight of metal oxides and the balance of silica, and have a particle size of 10 nm to 3 ?m. The particles are useful as a filler in epoxy resin base semiconductor sealants, a refractive index modifier or the like.

Abstract: Methods for the production of shaped nanoscale-to-microscale structures, wherein a nanoscale-to-microscale template is provided having an original chemical composition and an original shape, and the nanoscale-to-microscale template subjected to a chemical reaction, so as to partially or completely convert the nanoscale-to-microscale template into the shaped nanoscale-to-microscale structure having a chemical composition different than the original chemical composition and having substantially the same shape as the original shape, being a scaled version of the original shape. The shaped nanoscale-to-microscale structure formed comprises an element (such as silicon), a metallic alloy (such as a silicon alloy), or a non-oxide compound (such as silicon carbide or silicon nitride).

Abstract: An external additive for a toner for electrophotography which contains oxide fine particles which contain silicon, in which the oxide fine particles have a primary particle diameter of 30 nm to 300 nm in number average, a standard deviation ? of a particle size distribution of the primary particle diameter satisfies a relation of: R/4???R, in which the R expresses the primary particle diameter, the oxide fine particles are substantially spherical having a circularity SF1 defined as equation (1) of 100 to 130 and a circularity SF2 defined as equation (2) of 100 to 125; SF1=(L2/A)×(?/4)×100??equation (1) SF2=(P2/A)×(1/4?)×100??equation (2), in the equations, “L” expresses the absolute maximum length of the oxide fine particles; “A” expresses a projected area of the oxide fine particles; and “P” expresses a maximum perimeter of the oxide fine particles.

Abstract: Precipitated silicas useful, for example, as fillers in elastomer mixtures or vulcanizates have a particularly broad pore size distribution of the pores with a pore diameter smaller than that of the maximum of the derivative of the pore volume distribution function, and have simultaneously very low microporosity and high rubber activity.

Abstract: A silicon single crystal is produced by the CZ process by setting a hydrogen partial pressure in an inert atmosphere within a growing apparatus to 40 Pa or more but 400 Pa or less, and by growing a trunk part of the single crystal as a defect-free area free from the Grown-in defects. Therefore, a wafer the whole surface of which is composed of the defect-free area free from the Grown-in defects and which can sufficiently and uniformly form BMD can be easily produced. Such a wafer can be extensively used, since it can significantly reduce generation of characteristic defectives of integrated circuits to be formed thereon and contribute for improving the production yield as a substrate responding to the demand for further miniaturization and higher density of the circuits.

Abstract: [Problems] To provide a treatment method having excellent purification effect, in which impurities having high ionicity in a silica powder can be removed in a short time, a apparatus thereof, and a purified silica powder. [Means for Solving the Problems] A purification method of a silica powder comprises: making a silica powder into a fluid state; contacting a purified gas to the silica powder in the fluid state at high temperature; and thereby removing impurity components of the silica powder. In the method, the silica powder in the fluid state is positioned in a magnetic field region. Further, the silica powder is contacted with the purified gas, while applying voltage to the silica powder by an electric field generated by moving of the silica powder. Preferably, the silica powder in a fluid state is positioned in the magnetic region of 10 gausses or more, and contacted with the purification gas at a temperature of 1000° C. or more.

Abstract: The present invention relates to dew resistant coatings and articles having the dew resistant coating adhered thereto. The dew resistant coatings comprise elongate silica particles. These coatings are useful on articles or surfaces used in outdoor applications and articles and surfaces used in moist indoor environments.

Abstract: The invention relates to a method for producing (semi)metal oxides and hydroxides, such as Si02, Ti02, Zr02, Zn0 and other (semi)metal salts such as BaSO4, which can be produced by emulsion precipitation in the form of nanoparticles from an aqueous solution. The invention also relates to the use of the same.

Abstract: There is provided particulate silica which can be suitably used as a viscoelasticity modifier such as a thickener which is added to liquid such as water, a liquid resin or paint to adjust its viscoelastic properties such as viscosity and thixotropic nature, a reinforcer or filler for silicone rubber or sealants, a polishing agent for CMP (Chemical Mechanical Polishing) or a surface coating agent for ink-jet printing paper. The particulate silica has a BET specific surface area S of 130 to 380 m2/g, and its fractal shape parameter ?1 in an ?-value analysis target range of 20 to 30 nm satisfies the following equation (1) and its fractal shape parameter ?2 in an ?-value analysis target range of 30 to 50 nm satisfies the following equation (2). ?1+0.00175S<2.518??(1) ?2+0.00174S<2.

Abstract: A sintered silicon oxide for film vapor deposition having a density of 1.0 to 2.0 g/cm3, three-point flexural strength of at least 50 g/mm2, and a BET specific surface area of 0.1 to 20 m2/g is provided. When this sintered silicon oxide is used for evaporation source of a film, pin holes and other defects of the film caused by the problematic splash phenomenon can be reliably prevented and stable production of a reliable package material having excellent gas barrier property is been enabled. This invention also provides a method for producing such sintered silicon oxide, and this method can be used in a large scale production without requiring any special technology, and therefore, this method is capable of supplying the market with the sintered silicon oxide at reduced cost.

Abstract: A highly pure ultra-fine SiOx (wherein x is from 0.6 to 1.8) powder having a specific surface area of at least 10 m2/g and a total content of Na, Fe, Al and Cl of at most 10 ppm is provided. The SiOx powder is produced by reacting a monosilane gas with a gas capable of oxidizing the monosilane gas in a non-oxidizing gas atmosphere under a pressure of from 10 to 1000 kPa at a temperature of from 500 to 1000° C. In this case, the amount of the non-oxidizing gas is preferably larger than the total amount of the monosilane gas and oxygen participating in the oxidation of the gas capable of oxidizing the monosilane gas.

Abstract: The invention provides apparatus and a method for exothermic treatment of feed material to provide an ash. The apparatus includes a housing extending about a central axis and having first and second ends, and a central mixing zone adjacent the first end. A material intake carries the feed material into the housing and gas enters through a first gas inlet at the first end through guides to create an inner vortex extending axially about said axis and the gas then follows an outer vortex which also extends axially but in the opposite direction from that of the inner vortex. However the inner and outer vortices rotate in the same direction. A gas outlet is positioned to receive spent gas from the housing and an ash outlet is positioned remotely from the mixing zone to receive the ash. If preferred, the position of the ash outlet may be incorporated into the gas outlet. A control system is provided to limit the temperature in the feed material in the housing.

Abstract: Described are methods and chemistries for preparing firepolished quartz parts for use in semiconductor processing. The quartz parts in need of preparation include newly manufactured parts as well as parts requiring refurbishment after previous use in semiconductor processing. The embodiments described avoid methods and chemistries that may damage the surfaces of the quartz parts and render the parts unfit for use in semiconductor processing. A method in accordance with one embodiment minimizes damage by limiting exposure of the quartz parts to hydrofluoric acid. A quartz part for use in semiconductor processing comprises a surface including a surface portion having a surface portion area to expose to a gas, wherein at least 95 percent of the surface portion area is free of defects and wherein the surface portion has less than E12 atoms per centimeter squared of aluminum.

Abstract: A method of preparing mesoporous inorganic oxide spherical particles includes providing a reaction mixture capable of producing mesoporous inorganic oxide spheres; heating the reaction mixture to produce mesostructured inorganic oxide particles and removing organic material from the mesostructured inorganic oxide particles to form the mesoporous inorganic oxide spherical particles. In one embodiment a reaction mixture includes a proton donor, a source of inorganic oxide, and a source of fluoride. In another embodiment a reaction mixture includes a proton donor, a source of inorganic oxide, and an alcohol. Mesoporous inorganic oxide spheres produced by the method of the present invention are also provided.

Abstract: The invention relates to a microporous crystalline zeolite material which, in the calcined state and in the absence of defects in the crystalline lattice thereof, manifested by the presence of silanols, has empirical formula x(M1/nXO2):yYO2:SiO2, in which M is selected from among H+, at least one inorganic cation with charge +n and a mixture of both; X is at least one chemical element in oxidation state +3; Y is at least one chemical element in oxidation state +4, which is different from Si, x has a value of between 0 and 0.2 inclusive, and y has a value of between 0 and 0.1 inclusive. In addition, as it is synthesised, and in the calcined state, the material has a characteristic X-ray diffraction pattern known as ITQ-32. The invention also relates to the method of preparing said material and to the use thereof.

Abstract: A colloidal silica particle containing a light-absorbing substance, comprising a colloidal silica particle and a light-absorbing substance distributed over the colloidal silica particle, wherein the light-absorbing substance is chemically bound to or adsorbed on a silica component.

Abstract: A pillar-shaped honeycomb structure has a plurality of cells longitudinally placed in parallel with one another with a wall portion therebetween, wherein the honeycomb structure mainly includes inorganic fibers which form the honeycomb structure without lamination interfaces.

Abstract: Inorganic compound particles constituted of a shell, a porous matter or a cavity enclosed therein, and the porous matter or the cavity being kept unchanged in a subsequently formed transparent coating film.

Abstract: This disclosure describes a self-assembly templating of a cationic surfactant in the presence of a silica precursor that is free of an excessive variability of the assembled shapes and has a yield approaching one hundred percent. This disclosure describes a self-assembly process that includes cooling and keeping a resultant solution at cold temperatures during the synthesis.

Abstract: The invention concerns a process for the extraction of acid or basic oxides contained in a vegetal matter, more specifically it concerns the extraction of silica from rice husks. The invention also concerns pure oxides extracted from vegetal matter. The invention also concerns the process for the extraction of carbon-rich oxide compositions from vegetal matter, and compositions obtained through said process.

Abstract: New methods of treating silica wetcake during precipitated silica materials manufacturing are provided. Such methods permit a significant increase in high solids content processing while simultaneously reducing high viscosity of the resultant particles for transport facilitation. The resultant precipitated silica wetcake is treated with a borate-containing dispersant to impart the necessary low viscosity characteristics thereto. Such a dispersant accords not only such a viscosity result, but will not char or otherwise discolor the silica particles during evaporation of the liquids within the wetcake itself. Furthermore, such a dispersant, if left on the surfaces of such particles, will not deleteriously affect the abrasivity, fluoride compatibility, or other dentifrice properties of the precipitated silica materials themselves. Also encompassed within this invention are the resultant precipitated silica particles exhibiting borate residues and dentifrices including such materials.

Abstract: Precipitated silicas which have a broad pore size distribution of the pores with a pore diameter smaller than that of the maximum of the derivative of the pore volume distribution function are useful, for example, for tires.

Abstract: Silanised, structurally modified silicas, characterised by groups fixed on the surface, the groups being alkylsilyl (SiCnH2n+1, with n=2-18). They are produced in that pyrogenically produced silicas are treated with the silanising agent and structurally modified. They are used to improve scratch resistance in lacquers.

Abstract: The invention relates to instant drying glossy ink jet media made by using a sub-micron silica coating and a calendering process, preferably a supercalendering process.