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3680 results about "Aluminate" patented technology
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In chemistry, an aluminate is a compound containing an oxyanion of aluminium, such as sodium aluminate. In the naming of inorganic compounds, it is a suffix that indicates a polyatomic anion with a central aluminum atom.
Long persistent phosphors and persistent energy transfer technique
The invention provides long-persistent phosphors, methods for their manufacture and phosphorescent articles. The invention also provides a method for generating a long-persistent phosphorescence at a selected color. The phosphors of the invention may be alkaline earth aluminates, alkaline earth silicates, and alkaline earth aluminosilicates. The phosphors include those activated by cerium. The phosphors also include those in which persistent energy transfer occurs from a donor ion to an acceptor ion, producing persistent emission largely characteristic of the acceptor ion.
Owner:UNIV OF GEORGIA RES FOUND INC +1
Method of forming mixed rare earth oxide and aluminate films by atomic layer deposition
InactiveUS20070237697A1Rare earth metal compoundsChemical vapor deposition coatingAluminiumAluminate
A method is provided for depositing a gate dielectric that includes at least two rare earth metal elements in the form of an oxide or an aluminate. The method includes disposing a substrate in a process chamber and exposing the substrate to a gas pulse containing a first rare earth precursor and to a gas pulse containing a second rare earth precursor. The substrate may also optionally be exposed to a gas pulse containing an aluminum precursor. Sequentially after each precursor gas pulse, the substrate is exposed to a gas pulse of an oxygen-containing gas. In alternative embodiments, the first and second rare earth precursors may be pulsed together, and either or both may be pulsed together with the aluminum precursor. The first and second rare earth precursors comprise a different rare earth metal element. The sequential exposing steps may be repeated to deposit a mixed rare earth oxide or aluminate layer with a desired thickness. Purge or evacuation steps may also be performed after each gas pulse.
Owner:TOKYO ELECTRON LTD
Oilwell sealant compositions comprising alkali swellable latex
Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.
Owner:HALLIBURTON ENERGY SERVICES INC
Oilwell sealant compositions comprising alkali swellable latex
Sealant compositions comprising an alkali swellable latex and a pH increasing material and methods of using the same to service a wellbore are provided. In one embodiment, the sealant composition can be used in a wellbore and includes an alkali swellable latex and a pH increasing material. The sealant composition can have a pH of from about 7 to about 14. In other embodiments, the pH increasing material includes a base-producing material. The base-producing material can include alkali and alkali earth metal carbonates, alkali and alkali earth metal bicarbonates, alkali and alkali earth metal hydroxides, alkali and alkali earth metal oxides, alkali and alkali earth metal phosphates, alkali and alkali earth metal hydrogen phosphates, alkali and alkaline earth metal sulphides, alkali and alkaline earth metal salts of silicates, alkali and alkaline earth metal salts of aluminates, water soluble or water dispersible organic amines, polymeric amine, amino alcohols, or combinations thereof.
Owner:HALLIBURTON ENERGY SERVICES INC
Corrosion resistant sealant for outer EBL of silicon-containing substrate and processes for preparing same
InactiveUS20060280954A1More resistant to environmental attackResist attackMolten spray coatingBlade accessoriesAluminateMetallurgy
An article comprising a silicon-containing substrate, an environmental barrier coating (EBC) overlying the substrate, wherein the EBC comprises a higher metal silicate-containing outer barrier layer; and a corrosion resistant alumina / aluminate sealant for the higher metal silicate-containing outer barrier layer. A process is also provided for forming a corrosion resistant alumina / aluminate sealant layer over the higher metal silicate-containing outer barrier layer. Also provided is an alternative process for treating a porous higher metal silicate-containing outer barrier layer with a liquid composition comprising an corrosion resistant alumina / aluminate sealant precursor to infiltrate the porous higher metal silicate-containing outer barrier layer with the alumina / aluminate sealant precursor in an amount sufficient to provide, when converted to the corrosion resistant alumina / aluminate sealant, protection of the environmental barrier coating against environmental attack; and converting the infiltrated alumina / aluminate sealant precursor within the porous higher metal silicate-containing outer barrier layer to the corrosion resistant alumina / aluminate sealant.
Owner:GENERAL ELECTRIC CO
Catalytically inactive heat generator and improved dehydrogenation process
An improved dehydrogenation catalyst bed system for olefin production utilizing classical processing techniques is disclosed. The catalyst bed system comprises a dehydrogenation catalyst comprising an active component selected from an oxide of a metal of Group 4 or Group 5 or Group 6 and combinations thereof and a support selected from aluminum oxide, aluminas, alumina monohydrate, alumina trihydrate, alumina-silica, transition aluminas, alpha-alumina, silica, silicate, aluminates, calcined hydrotalcites, zeolites and combinations thereof mixed with a first inert material selected from any material that is catalytically inactive when subjected to reaction conditions that can effect dehydrogenation of olefins and that has a high density and high heat capacity and that is not capable of producing heat during any stage of the dehydrogenation process, and the dehydrogenation catalyst plus the first inert material then being physically mixed with a secondary component comprising a heat-generating inert material and a carrier capable of supporting the heat-generating inert material, wherein the secondary component is catalytically inert with respect to dehydrogenation reactions or to cracking or to coking and generates heat after being exposed to reducing and / or to oxidizing reaction conditions.
Owner:CLARIANT INT LTD
Process for producing alkyl esters from a vegetable or animal oil and an aliphatic monoalcohol
InactiveUS6878837B2High purityImpact on overall process costFatty oils/acids recovery from wasteFatty acid esterificationAluminateTransesterification
Alkyl esters of fatty acids, and high purity glycerin, are produced using a process comprising a set of transesterification reactions between a vegetable or animal oil and an aliphatic monoalcohol employing a heterogeneous catalyst, for example based on zinc aluminate, the water content in the reaction medium being controlled to a value that is below a given limiting value.
Owner:INST FR DU PETROLE
Preparation method of hydrogenation catalyst composition
ActiveCN102451703AImprove adhesionEasy to shapeCatalyst activation/preparationMetal/metal-oxides/metal-hydroxide catalystsAluminateHigh activity
The invention discloses a preparation method of a hydrogenation catalyst composition. According to the method, sodium meta-aluminate is adopted as an aluminum source in the preparation of a mixture of an NixWyOz composite oxide precursor and an Al2O3 precursor through a coprecipitation process, and a proper amount of a CO2 gas is accessed in the colloid forming process, so a difficult shaping problem of a bulk phase catalyst is solved, physicochemical properties of the catalyst are adjusted, and the composition which has the characteristics of large specific surface area and uniform aperture distribution and makes many metal active sites be exposed on the catalyst surface allows the utilization rate of active metals to be improved. The catalyst composition of the invention, which has increased apertures and pore volumes, allows the Ni-W high activity sites to be fully utilized and complex macrostructure molecules to easily contact with the active sites, so the catalyst composition is especially suitable for ultra-deep desulfurization reactions for the production of ultraclean diesel oil.
Owner:CHINA PETROLEUM & CHEM CORP +1
Thermal/environmental barrier coating system for silicon-containing materials
ActiveUS20060280963A1Prolong lifeImprove protectionFireproof paintsBlade accessoriesAluminateCoating system
A coating system for Si-containing materials, particularly those for articles exposed to high temperatures. The coating system exhibits improved resistance to corrosion from sea salt and CMAS as a result of using aluminate compounds to protect silicate-containing layers of the coating system. The coating system includes an environmental barrier coating, a thermal barrier coating overlying the environmental barrier coating and formed of a thermal-insulating material, and a transition layer between the environmental barrier coating and thermal barrier coating, wherein the transition layer contains at least one aluminate compound and / or alumina.
Owner:GENERAL ELECTRIC CO
Mercury adsorbents compatible as cement additives
InactiveUS20080134888A1Efficient removalReduce distractionsGas treatmentOther chemical processesAluminateSorbent
Solid adsorbents, following their use for mercury removal from flue gas, that do not interfere with the ability of air-entraining additives (such as surfactants) to form stable bubbles when added to fly ash containing the adsorbents. The interference is overcome by heating the materials used in the manufacture of the adsorbent so that magnesium hydroxide and / or one or more alkali compounds containing one or more silicate, aluminate, and / or phosphate moiety, added or already present in the materials, binds multivalent cations present in the materials that could otherwise interfere with the surfactant activity.
Owner:PRAXAIR TECH INC
Preparation of composite high-expansion cementing material by using industrial slag and preparation technique thereof
The invention relates to a preparation process of using industrial slag to prepare composite cementing materials with high expansibility. The cementing materials consist of four components. The first component includes three parts: one or a plurality of combinations of fly ashes, slag, etc., which contain aluminosilicate; one or a plurality of combinations of phosphogysum, fluorine gypsum, etc., which contain calcium sulfate; one or a plurality of combinations of carbide, alkaline residue, quick lime or slaked lime. The second component includes: one or a plurality of combinations of alkaline composition, such as the quick lime or slaked lime, the carbide slag, etc.. The third component includes one or a plurality of combinations of the phosphogypsum, fluorine gypsum, etc., which contain the calcium sulfate. The preparation method is: firstly, to evenly mix the raw materials of the first component which are grinded to be with the surface area of 200-500m<2> / kg through the steam curing of four hours to ten days at 50-100 DEG C and the calcining of 0.5-24h at the high temperature of 400-1000 DEG C to obtain the first component; secondly, to dry and grind the raw materials of the second and the third component to be with the surface area of 200-500m<2> / kg to obtain the second and the third component; thirdly, to evenly mix the first, the second and the third component.
Owner:BEIHANG UNIV
Free radical-forming activator attached to solid and used to enhance CMP formulations
ActiveUS20060117667A1Increased substrate removal rateImprove efficiencyPigmenting treatmentOther chemical processesAluminateOrganic acid
A CMP composition having: a fluid comprising water and at least one oxidizing compound that produces free radicals when contacted with an activator; and a plurality of particles having a surface and comprising at least one activator selected from ions or compounds of Cu, Fe, Mn, Ti, or mixtures thereof disposed on said surface, wherein at least a portion of said surface comprises a stabilizer. Preferred activators are selected from inorganic oxygen-containing compounds of B, W, Al, and P, for example borate, tungstate, aluminate, and phosphate. The activators are preferably ions of Cu or Fe. Surprisingly, as little as 0.2 ppm and 12 ppm of activator is useful, if the activator-containing particles are suspended in the fluid as a slurry. Advantageously, certain organic acids, and especially dihydroxy enolic acids, are included in an amount less than about 4000 ppm. Advantageously, activator is coated onto abrasive particles after the particles have been coated with stabilizer.
Owner:VERSUM MATERIALS US LLC
Corrosion resistant sealant for EBC of silicon-containing substrate and processes for preparing same
InactiveUS20060280955A1More resistant to environmental attackResist attackMolten spray coatingBlade accessoriesAluminateSealant
An article comprising a silicon-containing substrate, an environmental barrier coating (EBC) overlying the substrate, wherein the EBC comprises an outer alkaline earth aluminosilicate barrier layer; and a corrosion resistant alumina / aluminate sealant for the outer barrier layer. A process is also provided for forming a corrosion resistant alumina / aluminate sealant layer over the outer barrier layer of the EBC. Also provided is an alternative process for treating a porous outer barrier layer with a liquid composition comprising an corrosion resistant alumina / aluminate sealant precursor to infiltrate the porous outer barrier layer with the alumina / aluminate sealant precursor in an amount sufficient to provide, when converted to the corrosion resistant alumina / aluminate sealant, protection of the environmental barrier coating against environmental attack; and converting the infiltrated alumina / aluminate sealant precursor within the porous outer barrier layer to the corrosion resistant alumina / aluminate sealant.
Owner:GENERAL ELECTRIC CO
Expanding material for cast-in-situ hollow building roof component
InactiveCN101456716AReduce dosageCorrosion resistanceSolid waste managementCeramicwareAluminateCrack resistance
The invention relates to an expansion material for a cast-in-situ hollow floor member, which comprises 4 to 15 percent of sulphoaluminate cement or ferro-aluminate cement, 50 to 65 percent of Portland cement, 18 to 35 percent of fly ash, and 2 to 10 percent of modifying agent (weight percentage). The invention adopts the sulphoaluminate cement or the ferro-aluminate cement to be mixed with the Portland cement to ensure that the expansion material has good performances of light mass, high strength, corrosion resistance, thermal insulation and so on, and then is matched with other modifying agents to ensure that the expansion material can save the using amount of the cement and ensure that a floor system has the advantages of high strength, permeation resistance, freezing resistance, cracking resistance, friction resistance, ultraviolet irradiation resistance, tensile resistance, compression resistance, shock resistance, and good sound insulation effect when reducing the weight of the floor system.
Owner:HUNAN BDF ENERGY SAVING TECH
Previous concrete comprising a geopolymerized pozzolanic ash binder
ActiveUS20100058957A1Low costImprove performanceSolid waste managementCement productionAluminateCombustion
A process for making a pervious concrete comprising a geopolymerized pozzolanic ash. Generally, the process includes mixing a solid aggregate and a geopolymerized pozzolanic ash binder together to form a pervious concrete mixture. Some examples of suitable aggregates comprise recycled carpet, recycled cement, and aggregates of coal-combustion byproducts. The geopolymerized pozzolanic ash binder is made by combining a pozzolanic ash, such as fly ash, with a sufficient amount of an alkaline activator and water to initiate a geopolymerization reaction. The activator solution may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof. In some aspects, the final concrete forms a solid mass in the form of pavement or a pre-cast concrete shape. The solid mass of concrete may have a void content of between about 5% and about 35%.
Owner:CERAMTEC
Cement-base dual-liquid slip-casting material
The invention relates to a kind of pair-slurry affusing material prepared with cement as basic raw material. It is comprised of two kinds of dry powdery mixed materials A and B of affusing slurry pair-liquid formed after adding water. Their weight percents are respectively: mixed material A: sulfur aluminate cement 30% - 98.1%, retarder citric acid 0.1% - 0.5%, flocculant polyacrylamide 0% - 0.8%, water-reducing agent FDN 0.6% - 1.5% and inorganic padding pulverized coal ash 0% - 69.1%; mixed material B: Portland cement 20% - 88%, land plaster 6% - 15%, flocculant UWN 0% - 0.7%, accelerator lithium carbonate 0.4% - 1.0%, water-reducing agent FDN 0.5% - 1.3%, calcareousness 2.0% - 5.0% and inorganic padding pulverized coal ash 0% - 70.8%.
Owner:张振秋
Water based environmental barrier coatings for high temperature ceramic components
Environmental barrier coatings for high temperature ceramic components including: a bond coat layer; an optional silica layer; and at least one transition layer including: from about 85% to about 100% by volume of the transition layer of a primary transition material selected from a rare earth disilicate, or a doped rare earth disilicate; and from 0% to about 15% by volume of the transition layer of a secondary material selected from Fe2O3, iron silicates, rare earth iron oxides, Al2O3, mullite, rare earth aluminates, rare earth aluminosilicates, TiO2, rare earth titanates, Ga2O3, rare earth gallates, NiO, nickel silicates, rare earth nickel oxides, Lnb metals, Lnb2O3, Lnb2Si2O7, Lnb2SiO5, borosilicate glass, alkaline earth silicates, alkaline earth rare earth oxides, alkaline earth rare earth silicates, and mixtures thereof; where the transition layer is applied to the component as a slurry including at least water, the primary transition material and at least one slurry sintering aid, and where a reaction between the slurry sintering aid and the primary transition material results in the transition layer having a porosity of from 0% to about 15% by volume of the transition layer.
Owner:GENERAL ELECTRIC CO
Supports and catalysts comprising rare earth aluminates, and their use in partial oxidation
InactiveUS20050265920A1Large specific surface areaHydrogenHeterogenous catalyst chemical elementsAluminatePartial oxidation
The present invention relates to thermally stable supports and catalysts for use in high temperature operation, and methods of preparing such supports and catalysts, which includes adding a rare earth metal to an aluminum-containing precursor prior to calcining. The present invention can be more specifically seen as a support, process and catalyst wherein the thermally stable support comprises two rare earth aluminates of different molar ratios of aluminum to rare earth metal, and optionally, alumina and / or a rare earth oxide. More particularly, the invention relates to the use of noble metal catalysts comprising the thermally stable support for synthesis gas production via partial oxidation of light hydrocarbon (e.g., methane) with minimal deactivation over long-term operations and further relates to gas-to-liquids conversion processes.
Owner:CONOCOPHILLIPS CO
Solid Polymer Electrolyte Battery And Method For Manufacturing Positive Electrode Sheet Used Therein
ActiveUS20080020283A1Increase energy densityInhibition of oxidative degradationMaterial nanotechnologySolid electrolytesAluminateIonic conductance
An organic electrolyte battery that through inhibition of any oxidative decomposition of organic electrolyte under high voltage, attains an enhancement of cycle characteristics and is further capable of attaining a realization of high energy density. There is provided organic electrolyte battery (10) comprising positive electrode material (2) and negative electrode material (4) and, interposed therebetween, organic electrolyte (6), wherein positive electrode active material particles (8) as a constituent of the positive electrode have surfaces at least partially coated with attachment (12) with electronic conductance and ionic conductance not easily oxidized even when supplied with oxygen from the positive electrode active material. The above attachment (12) is composed of microparticles of inorganic solid electrolyte with ionic conductance (14) and microparticles of conductive material with electronic conductance (16). In a polymer lithium secondary battery, the microparticles of inorganic solid electrolyte consist of any one of lithium-containing phosphates, silicates, borates, sulfates, aluminates, etc., or a mixture thereof.
Owner:CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
Environmental barrier coating
A coating for a silicon based material such as those used in high temperature environments. An aspect of the invention is directed to an environmental barrier coating including a silicon bond coat, and intermediate coat, and a top coat. The intermediate coat may comprise tantalum aluminate, niobium aluminate, or a mixture of the two. The intermediate coat is resistant to solid-state suburface reactions with the bond coat and the top coat and is substantially inert to reactions with silica at high temperatures.
Owner:GENERAL ELECTRIC CO
Preparation of binderless ZSM-11 zeolite
The invention relates to a method for preparing no-binding agent ZSM-11 zeolite, which mainly aims at overcoming the defects of difficult recovery, easy deactivation and easy aggregation existing in the practical application of the zeolite powder and the problems of small effective surface area and limited diffusion due to the addition of the binding agent in the forming process. In the invention, at least one of diatomaceous earth, carbon white, silicasol or water glass is taken as a silicon source, at least one of aluminum oxide, aluminum salt or aluminate is taken as an aluminum source, and proper quantity of necessary crystal seed guiding agents are added and subjected to pugging, extrusion and forming so as to obtain a precursor mixture with the mass ratio of XNa2O:YAl2O3:100SiO2, wherein x is between 0.5 and 14, and y is between 0 and 6, and the precursor mixture is subjected to hydrothermal crystallization treatment in the water solution containing tetrabutyl ammonium positive ions and converted to the no-binding agent ZSM-11 zeolite. The technical proposal of the invention better resolves the problems, and can be applied to the industrial preparation of the ZSM-11 zeolite molecular sieve catalyst.
Owner:CHINA PETROLEUM & CHEM CORP +1
YELLOW EMITTING PHOSPHORS BASED ON Ce3+-DOPED ALUMINATE AND VIA SOLID SOLUTION FOR SOLID-STATE LIGHTING APPLICATIONS
InactiveUS20090212314A1High crystallinityReducing atmosphereDischarge tube luminescnet screensElectroluminescent light sourcesAluminatePhosphor
A Ce3+ based aluminate phosphor or Ce3+ based phosphor in a solid solution can be used for white light generation when combined with a blue or ultraviolet light emitting diode.
Owner:RGT UNIV OF CALIFORNIA
Heat curable thermosetting luminescent resins
InactiveUS6905634B2Improve luminous performanceImprove propertiesLuminescent paintsElectroluminescent light sourcesSodium BentoniteAlkaline earth metal
Luminescent polymers are prepared from thermosetting unsaturated polyesters, suspending fillers and phosphorescent pigments and utilized to make gel coated articles and molded, cast and fiberglass reinforced plastic (FRP) articles. The luminescent polymers show bright and long-lasting photoluminescent afterglow, strong thermostimulation of afterglow by heat and electroluminescent properties. The preferred thermosetting unsaturated polyester resins are prepared by condensing mixtures of ethylenically unsaturated and aromatic dicarboxylic acids and anhydrides with dihydric alcohols and a polymerizable vinylidene monomer. Preferred suspending fillers and thixotropic modifiers include silica, microspheres, glass fibers and other short fibers, nepheline syenite, feldspar, mica, pumice, magnesium sulfate, calcium carbonate, bentonite and the various clays and thixotropic modifiers and mixtures thereof. Preferred phosphorescent pigments include alkaline earth aluminate phosphors, zinc sulfide phosphors and mixtures of these phosphors.
Owner:BURNELL JONES PETER
Phosphorescent blends
InactiveUS20050035331A1Avoid safety hazardsFilm/foil adhesivesLuminescent compositionsPhosphatePreventing injury
Owner:SUN XIAO DONG
Iron-based powder
ActiveUS20040191519A1High wear of dieLess shiny and deterioratedSynthetic resin layered productsMetal-working apparatusSilanesZirconate
The present invention concerns a new ferromagnetic powder composition comprising soft magnetic iron-based core particles wherein the surface of the core particles are surrounded by an insulating inorganic coating, and a lubricating amount of a compound selected from the group consisting of silanes, titanates, aluminates, zirconates, or mixtures thereof. The invention also concerns a process for the preparation of soft magnetic composite materials using the new powder composition.
Owner:HOGANAS AB
Ceramic cores for casting superalloys and refractory metal composites, and related processes
A rare earth-based core for use in the casting of a reactive metal is described. The core contains a ceramic composition which includes at least about 10% by weight of monoclinic rare earth aluminate (RE4Al2O9), wherein RE represents at least one rare earth element; and at least about 10% by weight of at least one free rare earth oxide. The ceramic phase of the composition may include a microstructure which comprises a multitude of substantially spherical pores which are formed as a result of the removal of aluminum metal from the core composition during a heat treatment step. Additional embodiments relate to a method for the fabrication of a ceramic core, employing a rare earth oxide, aluminum metal, and a binder. Methods for removing cores from a cast part are also described.
Owner:GENERAL ELECTRIC CO
Cement-based self-leveling mortar
The invention relates to cement-based self-leveling mortar, which is prepared from the following raw materials in percentage by weight: 35 to 40 percent of No.425 ordinary portland cement, 10 to 15 percent of No.42.5 rapid hardening sulphoaluminate cement, 15 to 18 percent of heavy calcium carbonate, 0.45 to 1 percent of high polymer, 0.15 to 0.3 percent of water reducing agent, 0.15 to 0.3 percent of early strength agent, 0.15 to 0.3 percent of retarder, 0.15 to 0.3 percent of thickener and the balance of fine river sand with the fineness modulus of 1.2 to 1.5. Compared with other traditional cement self-leveling mortar, the self-leveling mortar has the characteristics of higher fluidity, higher leveling property, high early strength and the like.
Owner:CHENGDU JIAXIN TECH
Microcapsule for retarding oil gas well working fluid additive release and preparation method thereof
InactiveCN101144011AReduce releaseImprove stress resistanceDrilling compositionWorking fluidFracturing fluid
The invention provides a microcapsule for delaying the release of working fluid additives in oil and gas well and a method for preparing the same, which belongs to oilfield chemical field. The invented microcapsule is formed by 3.5-25 percent of working fluid additive in oil and gas well, 70-94 percent of aluminosilicate beads, 2-5 percent of polymer membrane, wherein the working fluid additive in oil and gas well is one of oil well cement early strength accelerator, gel strength accelerator, retarder or fracturing fluid crosslinking agent, gel breaker, the aluminosilicate beads are waste catalysts with 10-250 um particle size and 0.20-0.60cm3 / g pore volume 0.20-0.60cm3 / g, the polymer membrane is non water-soluble polymer with 0.02-03 million relative molecular mass. The prepared microcapsules have good effect of delaying release, pressure resistance, temperature resistance, and wide application range. The main raw material of aluminosilicate beads for preparing microcapsules belongs to waste reutilization, which is economical and environment-friendly. Furthermore, the microcapsule preparation technology of the invention is simple and the production cost is low, which is beneficial for industrial production.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Energy-saving type concrete crack repairing agent
The invention discloses an energy-saving type concrete crack repairing agent which comprises the following components in parts by weight: 12-18 parts of sand, 5-10 parts of a quartz powder, 20-35 parts of ordinary portland cement, 10-18 parts of sulphoaluminate cement, 6-12 parts of sodium silicate, 5-9 parts of a polyvinyl acetate emulsion powder, 3-7 parts of silica fume, 7-10 parts of a slag powder, 6-9 parts of fly ash, 8-10 parts of an expansive agent, 0.4-0.6 part of a polycarboxylic acid type high-efficiency water-reducing agent, and 0.2-0.4 part of polypropylene fiber. The concrete repairing agent has high bonding strength, and significantly improves the binding force between a new concrete interface and an old concrete interface; the concrete repairing agent is short in congealing curing time, fast in development of strength after congealing, and suitable for rapid repairing; the concrete repairing agent has the advantages of environmental protection, no toxicity, no smell, harmlessness to human bodies, single-component construction, and no pollution to the environment; and the concrete repairing agent can be used for repairing of concrete cracks, holes, honeycombs and pock marks, and drawing repairing of seams of face bricks and mosaic.
Owner:HUNAN CONSTR ENG GRP COR +1
Production method of high strength polycrystalline ceramic spheres
InactiveUS7220454B2High mechanical strengthImprove tolerancePretreated surfacesGlass/slag layered productsAluminatePorous membrane
A method for making hollow spheres of alumina or aluminate comprises: coating polymeric beads with an aqueous solution of an alumoxane, drying the beads so as to form an alumoxane coating on the beads; heating the beads to a first temperature that is sufficient to convert the alumoxane coating to an amorphous alumina or aluminate coating and is not sufficient to decompose the polymeric beads; dissolving the polymeric bead in a solvent; removing the dissolved polymer from the amorphous alumina or aluminate coating; and heating the amorphous alumina or aluminate coating to a second temperature that is sufficient to form a hollow ceramic sphere of desired porosity and strength. The hollow spheres can be used as proppants or can be incorporated in porous membranes.
Owner:RICE UNIV
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