Abstract: There is provided a nitride crystal substrate made of a nitride crystal with a diameter of 100 mm or more, having on its main surface: a continuous high dislocation density region and a plurality of low dislocation density regions divided by the high dislocation density region, with the main surface not including a polarity inversion domain.

Abstract: Described herein are apparatus, systems, and methods for the continuous production of BNNT fibers, BNNT strands and BNNT initial yarns having few defects and good alignment. BNNTs may be formed by thermally exciting a boron feedstock in a chamber in the presence of pressurized nitrogen. BNNTs are encouraged to self-assemble into aligned BNNT fibers in a growth zone, and form BNNT strands and BNNT initial yarns, through various combinations of nitrogen gas flow direction and velocities, heat source distribution, temperature gradients, and chamber geometries.

Abstract: A method for producing a carbon nanostructure aggregate having a large external specific surface area and a carbon nanostructure aggregate are provided. The method for producing a carbon nanostructure aggregate comprises supplying a source gas to a catalyst to grow a carbon nanostructure aggregate comprising a plurality of carbon nanostructures by a chemical vapor deposition method, wherein a gas derived from the source gas and brought into contact with the catalyst comprises: as a hydrocarbon to serve as a carbon source, at least one of: a hydrocarbon A having at least one acetylene skeleton, a hydrocarbon B having at least one 1,3 -butadiene skeleton, a hydrocarbon C having at least one cyclopentadiene skeleton, and a hydrocarbon D having at least one allene skeleton, and carbon monoxide and carbon dioxide; and satisfies 0.01?[CO]/[C]?15 where [C] is a total volume concentration of carbon contained in the hydrocarbons A, B, C, and D, and [CO] is a volume concentration of carbon monoxide.

Abstract: A method of making a graphene-containing material comprising the steps of: electrolytically reducing a transition metal oxide to a transition metal in an electrolytic cell using a molten salt electrolyte and a carbon anode; followed by extracting a dry graphene material from the electrolytic cell. Also provided is a graphene-containing material obtainable by the method of the invention.

Abstract: A graphene dispersion paste has a viscosity in a range from 50,000 to 350,000 cps and a scraper fineness less than 20 ?m, and includes graphene sheets, a solvent and a first polymer, wherein the graphene sheets have a bulk density in a range from 0.005 to 0.05 g/cm3, a thickness in a range from 0.68 to 10 nm, and a plane lateral dimension in a range from 1 to 100 ?m. The present application further provides methods of preparing and using the graphene dispersion paste.

Abstract: The disclosure provides for methods of oxidizing carbide anions, or negative ions, from salt like carbides at low temperatures below about 600° C. In another aspect, the disclosure provides for reactions with intermediate transition metal carbides. In yet another aspect, the disclosure provides for a system of reactions where salt-like carbide anions and intermediate carbide anions are oxidized to produce pure carbon of various allotropes.

Abstract: The invention provides a method for making multiporous carbon material from a bio-oil produced by a biomass thermochemical process. The bio-oil is blended with a resin and a Zinc Oxide (ZnO) template as a major component of a precursor. The pore sizes of the carbon material made by the invention comprise mesopores and micropores to form the multiporous carbon material. The main production steps include: (1) mixing the precursor with a crusher, (2) packing the precursor, (3) heating for carbonization: holding 350° C. for 1 hour then holding 900° C. for 2 hours, and (4) washing the ZnO with hydrochloric acid by adjusting the pH value to less than 1.

Abstract: Disclosed herein is a method for preparing coal-based, briquetted activated carbon. The method includes subjecting raw coal to a briquetting process, pulverizing the briquettes into particles, and performing carbonization and activation to obtain activated carbon. The briquetting process includes pulverizing raw coal to produce a feed, feeding the feed into a feed bin for degassing, adjusting the temperature and the water content of the feed in the feed bin, and feeding the feed in the feed bin into a briquetting apparatus for briquetting to form coal briquettes. The raw coal briquetting process of the preparation method is suited to a wide variety of coal, including non-caking coal. The preparation method yields a coal briquette product with a strength greater than 89% without any binder, which is beneficial to improve the strength and the like of activated carbon.

Abstract: Methods for a facile, template free and one-step synthesis of nanoporous carbons by using a heterocyclic aromatic organic compound as a single source precursor of both carbon and nitrogen are described. The heterocyclic aromatic organic compound contains nitrogen in pyrrolic and/or pyridinic positions and is chemically activated with NaOH, KOH or ZnCl2 at high temperatures in a solid state mixture as a synthesis protocol to promote fine micropores during carbonization. Nanoporous carbons synthesized by these methods that have superior gas sorption/storage and energy storage properties are also described. The nanoporous carbons are useful as carbon sequestration agents and supercapacitors.

Abstract: An ultra dense and ultra low power microhotplates using silica aerogel and method of making the same, comprising creating a sol-gel by impregnation of ethanol with functional colloidal alcogel particles is described. The technique further comprises forming tiny aerogel particles on the wafer and networking the particles together just by exposure to air during spin coating. The novelty of this technique is not limited to the processing of thin film and thick film silica aerogel.

Abstract: The present invention relates to a new method for producing a calcium sulphate hemihydrate with unique properties for use for therapeutic applications in the cosmetic or pharmaceutical industry. Calcium sulphate hemihydrate is a biocompatible and biodegradable inorganic substance and thus suitable as a carrier in pharmaceutical compositions, e.g. a controlled release composition, containing at least one pharmaceutically active ingredient.

Abstract: A method for manufacturing a Zinc oxide nanocapsule includes: a step of preparing a Zinc oxide narorod; a step of etching the Zinc oxide narorod to form a Zinc oxide nanotube, wherein the Zinc oxide nanotube is a hollow tubular structure; a step of filling a material into the Zinc oxide nanotube; and, a step of regrowing the Zinc oxide nanotube to encapsulate the hollow tubular structure so as to form a Zinc oxide nanocapsule. In addition, a zinc oxide nanocapsule is also provided.

Abstract: To provide electrolytic manganese dioxide excellent in packing property and high-rate discharge characteristics when used as a cathode material for alkaline dry cells. Electrolytic manganese dioxide in which the half-value width of the (110) plane in XRD measurement using CuK? line as the radiation source is at least 1.8° and less than 2.2°, the peak intensity ratio of X-ray diffraction peaks (110)/(021) is at least 0.70 and at most 1.00, and the JIS-pH (JIS K1467) is at least 1.5 and less than 5.0; a method for producing the electrolytic manganese dioxide; and its application.

Abstract: The present invention relates to an improved process for producing iron oxide red pigments by the Penniman process using nitrate (also referred to as nitrate process or direct red process) and apparatuses for carrying out the process.

Abstract: A system for distilling water is disclosed. The system comprises a heat source, and a plurality of open-cycle adsorption stages, each stage comprising a plurality of beds and an evaporator and a condenser between a first bed and a second bed, wherein each bed comprises at least two vapor valves, a plurality of hollow tubes, a plurality of channels adapted for transferring water vapor to and from at least one of the condenser or the evaporator, a thermally conductive water vapor adsorbent, and wherein each vapor valve connects a bed to either the condenser or the evaporator.

Abstract: A system and method for decontaminating a fluid like a non-azeotrope solvent such as water, wherein a transport gas is maintained at a temperature between the freezing point and boiling point at atmospheric pressure of the solvent and continuously circulated between an evaporation chamber and a condensation chamber, a contaminated solvent is introduced into the transport gas in the evaporation chamber under process heat and contaminant precipitates out, and the cleaned solvent cools in the condensation chamber releasing heat to be used in the evaporation chamber. A heat pump is used to promote evaporation and condensation within the system.

Abstract: A system, for recycling production salt water from an oil well, may include a salt water inlet valve configured to receive salt water; a separation tank configured to receive the salt water from the salt water inlet valve; a burner tube located within the separation tank that is configured to pass hot gas through the separation tank and boil the salt water; a steam exhaust configured to release steam produced by the separation tank; and a salt valve configured to release salt produced by the separation tank.

Abstract: A skid-mounted system, for recycling production salt water from an oil well, may include a skid housing; a separation tank enclosed within the skid housing; a control system enclosed within the skid housing; a salt water port configured to be connected to a supply of salt water and transfer the salt water to the separation tank; a fuel port configured to be connected to a fuel supply and provide fuel to a burner attached to the separation tank; an exhaust stack that is connected to the separation tank and that is configured to exhaust hot gas produced by the burner to an environment; and a steam stack that is connected to the separation tank and that is configured to release steam produced by the separation tank.

Abstract: Methods and systems for treating brine to produce distilled water and dried NaCl are disclosed. The brine enters a crystallization plant and is heated. Once heated, the brine is circulated to an evaporator. The evaporator increases the concentration of NaCl in the brine to a point about the super saturation level. Once above the super saturation level, NaCl crystals are formed. The larger crystals are circulated to a centrifuge for drying and the smaller crystals are recirculated through the evaporator for continued growth. The NaCl crystals are dried in the centrifuge.

Abstract: A process for the treatment of contaminated water (10) includes contacting the contaminated water with cryptocrystalline magnesite (14) thereby to remove one or more contaminants from the water. The invention extends to powdered cryptocrystalline magnesite with a particle size such that the powdered or particulate cryptocrystalline magnesite is able to pass through a 125 ?m particle size sieve for use in the treatment of water.

Abstract: To efficiently perform an adhesion reduction treatment of water that circulates through a wet paint booth which contains a solvent-based paint by adding a relatively small amount of chemical to the water without the need for another chemical except that the alkaline chemical is used for pH adjustment, that is, with only one chemical. An aluminum salt having a basicity of 60% or more and an alkaline chemical are added to water that circulates through a wet paint booth which contains a solvent-based paint. An adhesion reduction treatment of the solvent-based paint is performed at a pH of 7 or more and is preferably performed at a pH of 7.5 or more. Using a powder mixture produced by mixing a powder of the aluminum salt with a powder of the alkaline chemical facilitates the treatment.

Abstract: The aspects of embodiments of the invention relate to advanced bioelectrochemical systems. More specifically, the invention relates to the utilization of a power source such as, but not limited to, photo-active, semiconducting materials, batteries, or the like integrated with bioelectrochemical systems perhaps to increase oxidation and/or reduction reactions, which can be applied to the treatment of pollutants environmental media such as but not limited to water, wastewater, soil, and other water-containing environment.

Abstract: The present invention provides compositions and methods of reducing cyanuric acid levels in recreational water systems.

Abstract: The system relates to a disk filter for effectively preventing scale formation in a water treatment process, and to a water treatment apparatus and method using the same. The disk filter includes a housing having a cylindrical shape, a raw water inlet formed at a predetermined position on the side surface of the housing, a raw water outlet formed at a central region in the bottom of the housing, a backwash water outlet formed at a central region in the top of the housing, a ceramic filter provided in a circular disk shape inside the housing, and a scale formation inhibitor loaded in a flow channel formed inside the ceramic filter, wherein raw water introduced via the raw water inlet passes through the ceramic filter and then through the flow channel filled with the scale formation inhibitor, and is then discharged via the raw water outlet.

Abstract: The invention relates to a ternary sewage treatment method integrating microbial fuel cells with anaerobic acidification and forward osmosis membrane, and belongs to the technical field of sewage treatment. The method of the invention comprises the following steps: Sewage is driven into the anaerobic acidification device for mixture with the NaOH solution. The mixed liquid enters into the MFC for converting the enriched organics to bioelectricity and then flows back to the anaerobic acidification device. A part of the mixed liquid passes through the MF membrane module to form effluent and enters into the sedimentation basin for phosphate removal and finally passes through activated carbon adsorption column, another part passes through the FO membrane module to form effluent and obtain high quality recycled water after the RO membrane processing. The method is a new coupled model of FO membrane and MFC and it provide a ternary combined technique integrating MFCs with anaerobic acidification and FO membrane.

Abstract: An apparatus for conditioning an aqueous liquid includes at least one inlet, at least one liquid treatment device for the treatment of liquid by ion exchange including a cation exchange material of which at least a portion is in the hydrogen form, a membrane filtration device and a section arranged to process filtrate produced by the membrane filtration device. This section includes a liquid treatment device for dissolving at least one mineral contributing to carbonate hardness in water into at least some of the liquid passing through the section. At least one of the at least one inlets is connected to an inlet of the membrane filtration device via at least one of the at least one liquid treatment devices for the treatment of liquid by ion exchange.

Abstract: A method of treating a mixture of microorganisms containing phosphorus and magnesium, by first inducing the mixture microorganisms to release phosphorus and magnesium. Next an emancipation or elutriation is performed. Phosphorus and magnesium-rich liquid is then tapped off as the mixture is thickened, to produce phosphorus and magnesium-rich liquid and phosphorus and magnesium-reduced treated mixture. This treated mixture is placed in an anaerobic digester where ammonia is formed but combines very little with phosphorus or magnesium as these elements have been reduced in concentration. Then the high-ammonia mixture is dewatered, to produce an ammonia-rich liquid, which is combined with the phosphorus and magnesium-rich liquid. In one preferred example a useable struvite product is harvested from this combination. Additionally, the production of nuisance struvite in the anaerobic digester is reduced, in comparison with prior art waste treatment methods.

Abstract: According to one embodiment, a forming body of a glass forming apparatus may include an upper portion with a first forming surface and a second forming surface extending from the upper portion. The first forming surface and the second forming surface may converge at a bottom edge of the forming body. A trough for receiving molten glass may be positioned in the upper portion of the forming body. The trough may include a first weir, a second weir opposite from and spaced apart from the first weir, and a base extending between the first weir and the second weir. At least a portion of a vertical surface of the first weir may curve inward towards a centerline of the trough. Similarly, at least a portion of a vertical surface of the second weir may curve inward towards the centerline of the trough.

Abstract: Described herein are glass forming apparatuses with cooled muffle assemblies and methods for using the same to form glass ribbons. According to one embodiment, a muffle assembly for a fusion forming apparatus may include a muffle frame comprising a back wall, a front wall opposite the back wall, and a pair of sidewalls joining the front wall to the back wall in a closed-loop. At least one first cooling tube may extend through the back wall and the front wall across the closed-loop. At least one second cooling tube may extend through the back wall and the front wall across the closed loop such that the at least one second cooling tube is spaced apart from and parallel with the at least one first cooling tube.

Abstract: A quartz glass body and a process for the preparation of a quartz glass body is disclosed. In one aspect, the process includes providing a silicon dioxide granulate from a pyrogenic silicon dioxide powder, making a glass melt out of the silicon dioxide granulate and making a quartz glass body out of at least part of the glass melt. In at least one process a silicon component different from silicon dioxide is added. One aspect further relates to a quartz glass body which is obtainable by this process. A light guide, an illuminant and a formed body, are each obtainable by further processing of the quartz glass body.

Abstract: A glass panel unit having an inner space at a reduced pressure and a building component including such a glass panel unit are provided such that no traces of an exhaust pipe are left on their outer surface. To achieve this, a glass panel unit manufacturing method includes a bonding step, a pressure reducing step, and a sealing step. The bonding step includes bonding together a first substrate (10) and a second substrate (20) with a first sealant (410) to create an inner space (510). The pressure reducing step includes producing a reduced pressure in the inner space (510) through an exhaust port (50) that the first substrate (10) has. The sealing step includes melting a second sealant (420) inserted into the exhaust port (50) by locally heating the second sealant (420), and deforming the second sealant (420) by pressing the second sealant (420) toward the second substrate (20), to seal the exhaust port (50) up with the second sealant (420) melted and deformed.

Abstract: Preparation of halogen-doped silica is described. The preparation includes doping silica with high halogen concentration, sintering halogen-doped silica to a closed-pore state, and subjecting the closed-pore silica body to a thermal treatment process and/or a pressure treatment process. The temperature of thermal treatment is sufficiently high to facilitate reaction of unreacted doping precursor trapped in voids or interstices of the glass structure, but is below temperatures conducive to foaming. Core canes or fibers drawn from halogen-doped silica subjected to the thermal treatment and/or pressure treatment show improved optical quality and possess fewer defects. The thermal treatment and/or pressure treatment is particularly advantageous when used for silica doped with high concentrations of halogen.

Abstract: A lathe-based system may include chucks to retain a glass core rod, an arm, a slip joint, an actuator system, and a control system. The slip joint may couple the arm and a first chuck in fixed relation against relative axial motion with respect to an axis of rotation. The slip joint may also couple the arm and the first chuck in two-dimensionally movable relation with respect to a plane normal to the axis of rotation. The actuator system may be configured to two-dimensionally adjust a position of the first chuck in the plane. The control system may measure straightness of the glass core rod and control the actuator system in response to optical measurements of the straightness. In this manner, the system may straighten the glass core rod. The system may simultaneously elongate the glass core rod as it straightens the glass core rod.

Abstract: Methods, apparatuses, and computer-readable media for automatically creating an ad campaign for mobile applications are disclosed. A campaign server may automatically generate an ad creative and determine desired ad distribution parameters, including ad viewer characteristics, required ad viewer hardware and software, languages, geographical location of ad viewers, etc. The data for automatically generating an ad creative and creating the ad campaign may be retrieved from online application sellers. The ad creative may be generated using retrieved data such as ratings, price, icon, etc. An estimated reach of the number of ad viewers and impressions may be computed. Statistics regarding the impressions and click-throughs may also be collected for the advertiser. An interface to the campaign server may also be directly accessible for a user logged into an advertising network.

Abstract: The invention relates to glass sheet having a composition comprising the following in weight percentage, expressed with respect to the total weight of glass: Total iron (expressed in the form of Fe2O3) 0.002-0.15% Selenium (expressed in the form of Se) 0.0003-0.005% Cobalt (expressed in the form of Co) 0.00005-0.0015%; the glass sheet being characterized in that: N?10.3*Fe2O3+0.11; N being defined as Formula (I). Such a glass sheet has a high luminous transmittance and has colorless/achromatic edges (very neutral in color). This invention is particularly suitable due to its aesthetics as building glass or interior glass, like for example in furniture applications.

Abstract: An optical glass includes La3+, Zn2+, Nb5+, and Ti4+ as a cation configuring glass. La3+, Zn2+, Nb5+, and Ti4+ which satisfy 10 cat %?La3+?20 cat %, 10 cat %?Zn2+?60 cat %, 20 cat %?Nb5+?60 cat %, and 0 cat %?Ti4+?40 cat % expressed by cation %.

Abstract: Provided is a wavelength conversion member that is less decreased in luminescence intensity with time by irradiation with light of an LED or LD and a light emitting device using the wavelength conversion member. A wavelength conversion member is formed of an inorganic phosphor dispersed in a glass matrix, wherein the glass matrix contains, in % by mole, 30 to 85% SiO2, 0 to 20% B2O3, 0 to 25% Al2O3, 0 to 3% Li2O, 0 to 3% Na2O, 0 to 3% K2O, 0 to 3% Li2O+Na2O+K2O, 0 to 35% MgO, 0 to 35% CaO, 0 to 35% SrO, 0 to 35% BaO, 0.1 to 45% MgO+CaO+SrO+BaO, and 0 to 4% ZnO, and the inorganic phosphor is at least one selected from the group consisting of an oxide phosphor, a nitride phosphor, an oxynitride phosphor, a chloride phosphor, an oxychloride phosphor, a halide phosphor, an aluminate phosphor, and a halophosphoric acid chloride phosphor.

Abstract: The embodiments described herein relate to chemically and mechanically durable glass compositions and glass articles formed from the same. In an embodiment the glass composition may include from about 67 mol. % to about 80 mol. % SiO2; from about 3 mol. % to about 13 mol. % alkaline earth oxide; from about 2 mol. % to about 10 mol. % Al2O3; from about 2 mol. % to about 18 mol. % alkali oxide, wherein the alkali oxide comprises non-zero amounts of Na2O; from 0 mol. % to about 4 mol. % B2O3; and from about 0.01 mol. % to about 1 mol. % of a fining agent.

Abstract: A method for processing a transparent workpiece includes forming a closed contour line having a plurality of defects in the transparent workpiece such that the closed contour line defines a closed contour. Forming the closed contour line includes directing a pulsed laser beam through an aspheric optical element and into the transparent workpiece such that a portion of the pulsed laser beam directed into the transparent workpiece generates an induced absorption within the transparent workpiece, the induced absorption producing a defect within the transparent workpiece, and translating the transparent workpiece and the pulsed laser beam relative to each other along the closed contour line. The method further includes etching the transparent workpiece with a chemical etching solution at an etching rate of about 2.

Abstract: An anti-glare glass of the present disclosure has excellent anti-glare properties and visibility by forming glass in which polysilazane-derived surface unevenness are applied to a glass surface without mixing a heterogeneous element, and has remarkably improved wear resistance and durability since the polysilazane is changed for glass on the glass surface by thermal treatment.

Abstract: A system and a method of manufacturing continuous glass filament fiberglass media comprises melting glass within a temperature controlled melter. Molten glass exits through orifices in a bushing plate. The resulting fiberglass filaments are received on a rotating drum and sprayed with binder and aqueous solution. The resulting fiberglass mat is placed onto a let-off table then sprayed with aqueous solution before further processing.

Abstract: The efficiency of ion exchange processes is increased by increasing the concentration of nitrite salts in the molten salt bath. The increase in nitrite salt concentration may be achieved by adding a nitrite salt to a molten nitrate salt bath, aging a molten nitrate salt bath, or a combination thereof.

Abstract: The invention concerns a method for manufacturing glass substrates with reduced internal reflectance by ion implantation, comprising ionizing a source gas of N2, O2, Ar, and/or He so as to form a mixture of single charge and multicharge ions of N, O, Ar, and/or He forming a beam of single charge and multicharge ions of N, O, Ar, and/or He, by accelerating with an acceleration voltage comprised between 15 kV and 60 kV and an ion dosage comprised between 1017 ions/cm2 and 1018 ions/cm2. The invention further concerns glass substrates having reduced internal reflectance, comprising an area treated by ion implantation with a mixture of simple charge and multicharge ions according to this method.

Abstract: The invention concerns a method for manufacturing heat treatable antireflective glass substrates by ion implantation, comprising selecting a source gas of N2, O2, or Ar, ionizing the source gas so as to form a mixture of single charge and multicharge ions of Ar, N, or O, forming a beam of single charge and multicharge ions of Ar, N, or O by accelerating with an acceleration voltage comprised between 15 kV and 60 kV and setting the ion dosage at a value comprised between 7.5×1016 and 7.5×1017 ions/cm2. The invention further concerns heat treatable and heat treated antireflective glass substrates comprising an area treated by ion implantation with a mixture of simple charge and multicharge ions according to this method.

Abstract: The invention discloses a method and an apparatus for drying and cooling a glass substrate. The method comprises the steps described below. The method delivers the glass substrate cleaned by a cleaner into a baking oven by a first roller device. It dries the glass substrate using an infrared heating plate installed in the baking oven. It delivers the dried glass substrate into a cooling chamber by a second roller device. It cools the dried glass substrate using a cooling plate installed in the cooling chamber. And it delivers the cooled glass substrate onto a platform of an air floating type coater, and coating the glass substrate. This invention also discloses an apparatus corresponding to the method. According to the embodiments of the present invention, it is possible to reduce the number of foreign particles on the glass substrate before coating, and the drying effect is excellent.

Abstract: The present invention relates to a polymer composition for forming fibers for reinforcement of cement-based composites, polymer fibers made from the composition and methods of making the polymer fibers. The polymer composition comprises an olefin polymer and a bonding agent comprising vinyl alcohol based polymer, a pozzolanic material or a combination thereof.

Abstract: An improved process for the preparation of aggregates for use with mixtures of various carbonatable substances, in particular mixtures comprising pulverised fuel ash and/or steel slag. The mixtures also comprise a carbonatable binder. The process comprises the steps of a. blending a combination of two carbonatable wastes, b. mixing the blended carbonatable waste with a carbonatable binder, c. mixing the blended carbonatable waste and binder with water, and d. carbonating the damp blended carbonatable waste in the presence of carbon dioxide.

Abstract: Provided is a composite material including a blend of components. The blend includes phosphogypsum, bitumen and particulate matter. The phosphogypsum may be present in an amount of at least 10% w/w out of the total weight of said composite material. Also provided herein is a method of producing the composite material, by, at least, mixing phosphogypsum and particulate matter at a temperature above 150° C. for a time sufficient to receive an essentially dry particulate mixture in which the amount of the phosphogypsum is such to obtain a composite material having at least 10% w/w out of the total dry weight of said composite material. While mixing molten bitumen may be introduced into the essentially dry particulate mixture to obtain the composite material. Articles of manufacture including the composite material are also disclosed.

Abstract: A method for accelerating the strength of cement involves providing an activated fly ash processed to increase the surface area of the fly ash and reacting the activated fly ash with a polycarboxylate heteropolymer that acts as a catalyst to produce a pozzolanic cementitious material having as much as a 28% increase in strength (e.g., compressive strength). In one embodiment, the heteropolymer includes hydrophilic and hydrophobic components that assist in providing an optimal equilibrium for the formation of cementitious structures. The increase in strength permits reducing the amount of Portland cement mixed with the pozzolanic cementitious material to as little as 30% by weight, thus achieving a significant cost reduction.

Abstract: The invention relates to a process for preparing silica-coated particles of an inorganic expanding agent, the silica-coated particles and their use. The silica-coated particles show a delayed release of the expanding agent particularly in alkaline medium and at elevated temperatures. They are therefore useful in the oil and construction industry.