230 results about "Silenes" patented technology

The invention relates to a flotation method for niobium-containing minerals, and belongs to the technical field of mineral separation. The method comprises the steps that niobium-containing ore is subjected to crushing, ore grinding and size mixing, obtained ore pulp is subjected to weak magnetic treatment to remove strong magnetic minerals, after the pH of magnetic separation tailings is adjusted, a flotation reagent containing an iron mineral inhibitor and an amine collecting agent is added for silicon-niobium bulk flotation, and after the pH of obtained silicon-niobium bulk concentrate is adjusted, the obtained silicon-niobium bulk concentrate is subjected to flotation separation. And a flotation reagent containing a hydroximic acid metal organic complex collecting agent and a siliceous mineral inhibitor is added for silicon-niobium separation flotation, and niobium concentrate is obtained. According to the method, iron gangue mineral removal is achieved through step-by-step flotation by means of the amine collecting agent, silicon separation is achieved by means of the hydroximic acid metal organic complex collecting agent, efficient enrichment of the niobium mineral is achieved, the step of strong magnetic iron removal is avoided, the process is simplified, and the loss rate of the niobium mineral is reduced.

The invention provides a low-shrinkage copper slag-based cementing material and a preparation method thereof, and relates to the field of solid waste utilization. The low-shrinkage copper slag-based cementing material is prepared from copper slag, slag, fly ash, standard sand, water, a water glass exciting agent, sodium hydroxide, a magnesium oxide expanding agent, a water reducing agent and magnesium-aluminum hydrotalcite. According to the invention, the defects in the prior art are overcome, the problem of environmental pollution caused by solid waste stockpiling can be solved by taking the copper slag and the fly ash as siliceous materials and the slag as a calcium-silicon raw material, and the method has important environmental protection significance for the society. The resource utilization of various solid wastes is realized, and the sustainable development of resources is promoted. The prepared cementing material has good physical and mechanical properties and durability, and the product performance meets the national standard requirement.

The invention relates to a preparation method of a C-S-H seed crystal type super early strength agent as well as a product and application of the C-S-H seed crystal type super early strength agent, and belongs to the technical field of production of cement-based materials. According to the preparation method, the C-S-H seed crystal type super early strength agent is obtained by mainly utilizing a microwave irradiation principle and taking a siliceous raw material, a calcium raw material, a dispersing agent, an organic complexing exciting agent and water as raw materials to react. The preparation method provided by the invention is short in reaction time, and the synthesized C-S-H seed crystal type super early strength agent has the characteristics of good early strength effect, good stability, greenness and harmlessness, can be widely applied to various product concrete and cast-in-place concrete projects, and has wide research background and important significance in the field of synthesis of composite materials such as concrete admixtures.

The present application provides an LED chip based on an alumina-silica composite substrate and a fabrication method thereof. The LED chip comprises an alumina-silica composite PSS substrate, a composite buffer layer and an LED structural layer, wherein the composite buffer layer is epitaxially grown on the alumina-silica composite PSS substrate, and the LED structural layer is epitaxially grown on the composite buffer layer. The composite buffer layer comprises: an aluminium oxynitride / aluminium nitride layer and a silicon oxynitride layer, wherein the alumina in the alumina-silica composite PSS substrate is covered with the aluminium oxynitride / aluminium nitride layer, and the silica in the alumina-silica composite PSS substrate is covered with the aluminium oxynitride / aluminium nitride layer and the silicon oxynitride layer in a staggered manner.

The invention discloses a clean preparation method of a rare earth ferrosilicon alloy based on cooperative control of carbon addition and silicon supplement, and belongs to the technical field of thermometallurgy. In order to solve the problems that according to an existing carbon thermal reduction method, the furnace bottom is prone to nodulation, the recovery rate is low, and energy consumption is high, the'carbon addition-silicon supplementation-carbon depletion 'ternary cooperative regulation and control method is provided. Comprising the following steps: taking a rare earth-containing material, a siliceous raw material and a carbonaceous reducing agent as raw materials, burdening, pelletizing, and adding into a submerged arc furnace for reduction smelting; the core technology is that the weight ratio of oxide to reducing agent carbon in the rare earth pellets is controlled to be 1: (1.20-1.30), meanwhile, a silicon element accounting for 2.0-10.0% of the weight of the oxide is added, and parameters meet the coupling relational expression S = k * (1.30-R) * 100% + S0; and the smelting adopts carbon deficit operation, and the carbon addition amount is 0.90-0.95 times of the theoretical amount. The method inhibits the generation of the rare earth carbide nodule at the furnace bottom from the aspects of thermodynamics and dynamics, and realizes continuous and stable production. The rare earth recovery rate reaches 96% or above, the comprehensive power consumption is reduced to 8600-9000 kWh / t, the furnace life is prolonged to 25 months or above, and remarkable economic and environmental benefits are achieved.

This silicon carbide semiconductor device comprises: a semiconductor substrate SB made of 4H-SiC; a collector region CR formed in the semiconductor substrate SB; a contact layer CL in contact with the collector region CR and including a silicide region SCR and a non-silicide region NSCR; and a collector electrode CE in contact with the contact layer CL. The silicide region SCR has formed therein a silicide layer SC that has an upper surface and a lower surface. An altered layer AL made of 3C-SiC is interposed between the upper surface of the silicide layer SC and the collector region CR. The lower surface of the silicide layer SC is in contact with the collector electrode CE.

The present invention provides a paste-like heat dissipating silicone composition in which a crosslinked structure is formed, and which contains an addition reaction product of a component (A) and a component (B), and components (C), (D), and (E): (A) an organopolysiloxane which has an alkenyl group bonded to a silicon atom, but does not have an alkoxy group bonded to a silicon atom at a molecular chain terminal; (B) an organohydrogenpolysiloxane which has a hydrogen atom bonded to a silicon atom; (C) a thermally conductive filler; (D) an electromagnetic wave absorbing filler; and (E) a hydrosilylation reaction catalyst. As a result, the present invention provides: a silicone composition which exhibits excellent mountability and reliability, and has both heat dissipation properties and electromagnetic wave absorption properties; and a method for producing the silicone composition.

The invention provides a smelting method of steel for a non-quenched and tempered crankshaft, the steel for the non-quenched and tempered crankshaft comprises the following chemical components in percentage by weight: 0.25%-0.50% of C, 0.20%-0.80% of Si, 0.80%-1.80% of Mn, 0.020%-0.060% of S, 0.015%-0.060% of Al, 50-200ppm of N, less than or equal to 0.020% of P and the balance of Fe, inevitable impurities and one or more of V, Ti and Nb, and the total content of V, Ti and Nb is less than or equal to 0.20%. The smelting method comprises the steps of converter smelting, LF refining, RH vacuum degassing and continuous casting. Wherein 1-3 kg / t of silicon ball deoxidizer, 2-4 kg / t of lime and 4-8 kg / t of wollastonite are added during converter smelting and tapping; in the LF refining process, a siliceous deoxidizer with the total amount of 0.5-1.5 kg / t steel is added in batches for diffusion deoxidation during heating, and meanwhile, lime with the total amount of 2-6 kg / t steel and wollastonite with the total amount of 4-9 kg / t steel are added; and in the later stage of LF refining, sulfur-iron alloy is added, Al alloying is conducted in the RH vacuum degassing process, and calcium wires are fed after vacuum breaking. The casting continuity of the steel for the non-quenched and tempered crankshaft can be improved, and the content of inclusions can be controlled.

The invention provides a precise separation method for high-power and half-high-silica phosphorite. The precise separation method comprises the steps of photoelectric separation pretreatment, selective crushing, ore grinding, screening and targeted flotation. The method comprises the following steps: carrying out photoelectric separation on high-power and half-high siliceous phosphorite to obtain photoelectric separation concentrates and photoelectric separation tailings, carrying out selective ore grinding on the photoelectric separation concentrates, and screening the particle sizes of ore grinding products to distinguish mineral products with different particle size distributions and impurity components. And finally, precise separation and enrichment of the high-power and half-high siliceous phosphorite are realized through targeted flotation. Multi-section double reverse flotation is adopted, and collaborative separation of multiple elements such as magnesium, silicon, iron and aluminum is achieved. Compared with a conventional double-reverse flotation process, the process has the advantages that mineralogical ore properties and the process flow are coupled, so that the flotation process has selectivity; the precise separation method provided by the invention has the advantages of stable beneficiation process flow, good separation effect, high concentrate recovery rate, high phosphate concentrate grade, low content of iron and aluminum sesquioxide in concentrate products and the like.

The invention discloses a lightweight high-strength ceramsite proppant based on composite coating and low-temperature densification and a preparation method thereof. The coating proppant comprises a ceramsite proppant and a coating layer coating the surface of the ceramsite proppant, relates to the technical field of petroleum and natural gas engineering fracturing. The ceramsite proppant comprises bauxite, perlite, a composite sintering aid, B2O3 and AlF3. The composite sintering aid comprises MnO2 and TiO2; wherein the weight part ratio of the bauxite to the perlite to the composite sintering aid to the B2O3 to the AlF3 is 80: 20: (2.5-7.5): (3-12): (3-12); the low-grade bauxite and high-silicon raw material system is adopted, and a proper amount of sintering aid is introduced, so that the sintering temperature is effectively reduced, and the energy consumption is reduced; meanwhile, the volume density of the ceramsite proppant is reduced, and a lightweight product is obtained.

The invention relates to a method for preparing vanadium, chromium, aluminum and silicon products through gradient separation of vanadium shale. According to the technical scheme, silicon in the vanadium shale alkaline leaching solution is removed through a sulfuric acid precipitation method, and a desilicication solution and a siliceous precursor I are obtained; washing the siliceous precursor I with sulfuric acid, washing with water and calcining to obtain white carbon black; carrying out vanadium-chromium co-extraction on the desilicication liquid by adopting an amine extraction agent to obtain a vanadium-chromium organic phase; carrying out vanadium-aluminum extraction separation on the washing liquid by adopting an amine extraction agent to obtain a vanadium-rich organic phase and an aluminum-containing raffinate; the vanadium-rich organic phase and the vanadium-chromium organic phase are mixed, vanadium-chromium separation is achieved through step-by-step reverse extraction, and vanadium-rich liquid and chromium-rich liquid are obtained; adjusting the pH value of the aluminum-containing raffinate to precipitate aluminum hydroxide, and calcining to obtain aluminum oxide; carrying out ammonium salt vanadium precipitation on the vanadium-rich liquid to obtain ammonium polyvanadate, and calcining to obtain vanadium pentoxide; and reducing the chromium-rich liquid, adjusting the pH value, precipitating chromium hydroxide, and calcining to obtain chromium sesquioxide. The method is high in leaching rate, small in slag amount, high in product purity and high in recovery rate.

The present disclosure includes methods and systems of producing pozzolanic supplementary cementitious materials and / or aluminum compounds / additives and cementitious compositions with the pozzolanic supplementary cementitious materials and / or aluminum compounds / additives. These methods can include leaching a feedstock material with acid to produce a leachate and a residual solid, wherein the feedstock material comprises aluminum, silicon, and at least one of iron, calcium, and magnesium; separating the leachate comprising dissolved metal cations and the corresponding anions from the residual solid comprising the silicate and / or aluminosilicate; drying the residual solid to create pozzolanic supplementary cementitious material comprising the residual solid; adding a precipitating agent to the leachate solution to form an aqueous solution and a solid precipitate comprising an aluminum compound / additive; and separating the aluminum compound / additive precipitate from the aqueous solution.

A method for adjusting a channel length of silicon carbide MOSFET includes depositing a buffer layer and a poly-silicon layer on a first conductivity type epitaxial layer having a plurality of second conductivity type bases, etching the poly-silicon layer to form a poly-silicon pattern, depositing a spacer layer on the poly-silicon pattern and exposed buffer layer to a first deposition thickness, forming a first width of spacers of the poly-silicon pattern by dry etching the spacer layer, forming a pair of first conductivity type source regions on the second conductivity type bases by ion implantation into a first pattern mask formed on the buffer layer, forming a second conductivity type source region on the second conductivity type bases by implanting ions into a second pattern mask, and forming a gate electrode on a first channel extending from the first conductivity type source region to the first conductivity type epitaxial layer.

In method of manufacturing a semiconductor device, a source / drain epitaxial layer is formed, one or more dielectric layers are formed over the source / drain epitaxial layer, an opening is formed in the one or more dielectric layers to expose the source / drain epitaxial layer, a first silicide layer is formed on the exposed source / drain epitaxial layer, a second silicide layer different from the first silicide layer is formed on the first silicide layer, and a source / drain contact is formed over the second silicide layer.

The present invention concerns an industrial chemical process (400f) and an apparatus for carrying out that process. The chemical process integrates into a single, combined method: (i) a method (303, 304) of producing iron and / or manganese from their ores, and (ii) a method (205a, 205b, 207, 208, 209) of producing an oxide or hydroxide of at least one of calcium, magnesium and iron from another ore respectively comprising a carbonate mineral of at least one of calcium, magnesium and iron. This combined method has the iron and / or manganese ore and the other ore comprising the carbonate mineral as its only essential ingredients, with common salt and / or water as optional extra ingredients. The combined method produces iron and / or manganese in elemental form, an oxide or hydroxide derived from the carbonate mineral, and oxygen as its corresponding products. If the iron and / or manganese ore also comprises a siliceous mineral, the method may also produce an alkaline mixture comprising sodium silicate as a co-product. Salt and water act as intermediaries to produce these end-products, but are only consumed if supplied in excess. An amount of sodium oxide, hydroxide and / or carbonate determined by the amount of salt consumed may be produced as a co-product, along with a corresponding amount of at least one of chlorine and hydrochloric acid. An amount of hydrogen determined by the amount of water consumed may also be produced as a co-product, along with an increased amount of oxygen. The iron, manganese and oxygen produced may all be used in steelmaking. Any excess oxygen may be safely vented to atmosphere. The oxide or hydroxide derived from the carbonate mineral may be used in cement manufacture, as a flux in steelmaking and / or as an ingredient in the manufacture of soda-lime glass. The alkaline mixture comprising sodium silicate may be used as an alkaline activator for an alkaline activated or geopolymer cement. The sodium carbonate may be used in the manufacture of soda-lime and / or borosilicate glass, for example. The chlorine and / or hydrochloric acid may be used in the manufacture of chlorinated organic compounds, for example. The hydrogen may be used as a fuel in a hydrogen economy. The method of the invention requires no nett input of heat because the chemical reactions it involves are exothermic overall. It also consumes no fossil fuels and has electricity as its only energy requirement. Thus if the electricity is produced from a source of renewable energy, this method produces no greenhouse gas emissions. In some embodiments, the method can even have a negative carbon footprint overall. The invention is intended to replace existing techniques for producing iron and / or manganese from their ores, including hydrogen-DRI, the calcination of limestone and other carbonate minerals, both in cement manufacture and in the production of lime for other purposes, and the ammonia-soda, or Solvay, process for the production of sodium carbonate. The invention therefore has the potential to eliminate up to about 20% of anthropogenic carbon dioxide emissions. [Fig. 9B]

The invention discloses an environment-friendly composite construction type tundish dry material and a preparation method thereof, and belongs to the technical field of refractory castable. The invention relates to an environment-friendly composite construction type tundish dry material which is divided into the following three parts according to tundish function partition and damage mechanism difference: a tundish bottom dry material, a tundish wall dry material and a tundish slag line dry material, the ladle bottom dry material is a forsterite dry material; the ladle wall dry material is in Rlt of molten steel in the ladle; when R of the molten steel in the ladle is larger than or equal to 1, the dry material is a ladle wall aluminum-silicon dry material, and when R is larger than or equal to 1, the dry material is a ladle wall magnesium dry material; the ladle slag line dry material is in Rlt of molten steel in the ladle; when R of the molten steel in the ladle is greater than or equal to 1, the dry material is a slag ladle line aluminum-silicon dry material, and when R of the molten steel in the ladle is greater than or equal to 1, the dry material is a slag ladle line magnesium-calcium dry material. According to different damage mechanisms of the tundish bottom, the tundish wall and the slag line area and the potential of hydrogen of molten steel, different dry materials are designed respectively, and through chemical compatibility matching of materials and working conditions, collaborative strengthening of permeation resistance of the tundish bottom, thermal shock resistance of the tundish wall and erosion resistance of the slag line is achieved.

The application relates to a preparation method of a beta-C2S crystal structure, and the specific steps are as follows: S1, calcium raw materials, silicon raw materials and a crystal structure regulator are mixed according to a calcium-silicon molar ratio of 2:1 to obtain sintered raw materials; S2, the sintered raw materials obtained in the step S1 are mixed with anhydrous ethanol, are pressed into a green body, are dried, are sintered, are naturally cooled, and beta-C2S is obtained. Compared with the prior art, trace heavy metals Cr2O3 and ZnO are used as the crystal structure regulator to regulate the beta-C2S crystal structure, so that sintering at a lower temperature, higher reactivity, reduced calcination energy consumption, reduced beta-C2S cost and the cooling mode of relatively rapid cooling in the furnace are realized, the method is safer, has very important practical significance for industrial production and application of the beta-C2S, and provides technical support for low-carbon development of the silicate cement.

Title: LIQUID MAKEUP COMPOSITION COMPRISING SILICONE FILM FORMERS, OILS, A SILICONE GUM AND PIGMENTS AND METHOD FOR IMPLEMENTING IT. The present invention relates to a liquid cosmetic makeup for human keratinous materials, in particular skin and / or lips, preferably lips, comprising: - at least 20% by weight of at least one first nonpolar hydrocarbon oil, linear or branched, preferably saturated, having 8 to 16 carbon atoms, - at least one second oil selected from silicone oils, volatile or non-volatile, - at least one silicone elastomer carried in a hydrocarbon or silicone oil, identical or not to the first or second oil(s), - at least one silicone resin, - at least one silicone polyamide, - at least one silicone gum, - at least 8% by weight of pigments, possibly water with a content of less than 5% by weight,- the weight ratio (silicone resin + silicone polyamide) / pigment(s) being between 1 and 2.7. It also relates to a makeup process, in which this composition is applied to said keratinous materials.

The present invention provides a method (600a) and apparatus for producing an alkaline mixture comprising sodium silicate, which mixture is suitable for use as an alkaline activator for alkaline activated and geopolymer cements, but which may also be used, for example, to mineralize captured carbon dioxide. The method comprises comminuting (301) an ore of a target metal into fines, wherein the ore comprises a siliceous mineral and at least one of iron and manganese as the target metal. The siliceous mineral may comprise the target metal itself and / or it may be silica and / or another silicate mineral present as gangue. The ore is dehydrated and hydroxylated compounds contained therein are dehydroxylated (302). The ore thus treated is then reacted (601) in an inert atmosphere with an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and an oxide of the target metal from the ore, to precipitate out from the liquid sodium a solid phase comprising both the target metal in elemental form and other insoluble products comprising sodium oxide. The redox reaction is conducted at a temperature of at least 320 °Celsius to induce a reaction between the sodium oxide and silica derived from the siliceous mineral to produce sodium silicate, but also below a temperature at which the liquid sodium can react with the oxide of the target metal to produce a ternary oxide thereof. At least some of the liquid sodium having sodium silicate dissolved therein is then separated (305) from the solid phase and is reacted (602) with at least one of oxygen and water to produce a mixture comprising sodium silicate and at least one of sodium oxide and sodium hydroxide. The corresponding apparatus comprises a comminution device (such as a rock crusher or grinder), means for dehydrating and dehydroxylating the ore (such as a dryer), a gas-tight first reaction vessel for reacting the ore thus treated with the liquid sodium, a solid-liquid sodium phase separator, and a second reaction vessel for reacting the liquid sodium having sodium silicate dissolved therein with at least one of oxygen and water. The resulting alkaline mixture is therefore produced whilst extracting the target metal in elemental form from its ore. Thus the energy consumed is split between the production of these two co-products, making the method of the invention a low-energy method of producing an alkaline activator for alkaline activated and geopolymer cements. Both reactions (601, 602) are also significantly exothermic and at least some of the thermal energy from them may be recycled. The invention does not consume any carbon and is therefore at least carbon-neutral. On the other hand, it consumes the silica content of gangue mineral species and / or of siliceous minerals of the target metal in its ore, which have previously been treated as waste products. The amount of waste material produced when extracting the target metal from its ore is thereby reduced as well.

The invention discloses a gypsum composition as well as a preparation method and application thereof, and relates to the technical field of inorganic materials. The gypsum composition comprises gypsum, a filler, silicon-containing industrial solid waste, a nano siliceous material and an auxiliary agent, the nano siliceous material comprises nano silicon dioxide and modified nano silicon dioxide; the modified nano silicon dioxide is obtained by modifying nano silicon dioxide through a silane coupling agent. As gypsum putty, the gypsum composition has good coating matching performance, overcomes the defect that physical bonding between traditional gypsum putty and a coating is easy to peel off, can ensure that the coating is stable for a long time and does not fall off, improves the humidity resistance, and can keep stable performance and keep the beauty of wall decoration in the environments of plum rain seasons, coastal damp and the like. The service cycle is prolonged.

The invention discloses a low-creep siliceous prefabricated material and a preparation method thereof, and relates to the technical field of unshaped refractory materials, and the low-creep siliceous prefabricated material comprises the following components by weight: 40-50 parts of silica brick sand, 10-20 parts of calcined silica sand, 15-25 parts of silica brick powder, 1-5 parts of silica micropowder, 1-5 parts of calcium silicate cement clinker, 5-10 parts of silica sol, 1-5 parts of silicon nitride, and 0-0.5 part of a rare earth silicate solid solution. The composite water reducing agent is a mixture of sodium tripolyphosphate and a polycarboxylic acid water reducing agent, and the weight ratio of the sodium tripolyphosphate to the polycarboxylic acid water reducing agent is 2: 1. By optimizing the process ratio, the residual quartz amount and the creep rate of the siliceous prefabricated material are reduced, the long-term creep resistance of the siliceous prefabricated material under low stress is remarkably improved, and the siliceous prefabricated material with a more stable structure is provided for the high-temperature industry.

The present invention relates to a preparation method of a gypsum-based tile adhesive material, wherein the raw materials of the gypsum-based tile adhesive material include gypsum-based gel material, gypsum sand, dispersible latex powder, and cellulose ether; wherein the content of the gypsum-based gel material is within 40%. Compared with the existing scheme, the technical scheme of the present invention can be controlled to be 30-45% by developing a gypsum-based gel material and using gypsum sand as an aggregate. Moreover, due to the specially formulated gypsum-based gel material and gypsum sand in a water environment, the aluminum and silicon compounds in the raw materials undergo a ceramic reaction in an alkaline environment to form an ettringite structure (AFT) and / or hydrated calcium aluminate (C-S-H), thereby improving the density and water resistance of the tile adhesive solidification slurry, and having water-resistant properties in a real sense.

The invention discloses an experimental material for simulating gradual damage of a moraine structure, a preparation method and an experimental system. The preparation method comprises the following steps: preparing gravels, coarse sand and powder particles into a dry mixture; adding low-temperature molten soda-lime glass powder, and heating to form a siliceous cementation prototype; the preparation method comprises the following steps: adding pretreated calcium type clay and ice crystals into a material in a negative temperature environment, stirring, filling a mold and preliminarily fixing, feeding a carbonate solution into a fixed framework in batches through a liquid supply system at the bottom of the mold to realize mud-salt integrated synergistic cementation, and finally, compacting and carrying out negative temperature maintenance to obtain the experimental material. The experimental system integrates a temperature control unit, a pressurization and force measurement integrated module, an in-mold directional constant-flow liquid supply module and a control unit, and the whole process from material preparation to progressive failure test is integrated and automatically controlled. Compared with the prior art, the method has the advantages that an ice, mud-salt and siliceous triple cementation structure is successfully constructed in the material, and the problem of temperature and pressure disturbance caused by sample transfer is thoroughly solved.

The invention discloses a high-strength low-adsorption high-silicon ceramic tea ware. A green body of the ceramic tea ware is prepared from the following raw materials in parts by weight: 70 to 72 parts of silicon dioxide, 20 to 25 parts of aluminum oxide, 1.3 to 1.8 parts of potassium oxide, 0.8 to 1.0 part of sodium oxide, 0.2 to 0.4 part of calcium oxide, 0.1 to 0.2 part of magnesium oxide, 0.5 to 1.0 part of barium oxide, 0.5 to 2.0 parts of zinc oxide and 1.0 to 3.0 parts of zirconium oxide. According to the invention, aluminum oxide can react with silicon dioxide in the sintering process to form mullite Al2O3.2SiO2 and form a K2O-Al2O3-SiO2 ternary phase diagram system, and aluminum oxide, barium oxide, zinc oxide and zirconium oxide are adopted, so that the lowest eutectic point is reduced, the toughness of a green body is enhanced, the stability and impact strength of the green body are improved, and the heat stability of the green body is high; the ceramic body can adapt to water heat exchange at 180-20 DEG C, and high strength and low adsorption performance of the ceramic body are achieved.

Concrete materials and thermal energy storage devices employing such concrete materials are disclosed herein. The concrete material may include fibers in an amount ranging from about 1 to about 2 vol. %; an aggregate in an amount ranging from about 50 to about 80 vol. %, wherein the aggregates comprises siliceous aggregate and optionally carbonate aggregate; and a cementitious material in an amount from about 12 to about 20 vol. %, wherein the cementitious material comprises a combination of about 70 to about 85 vol. % of Portland cement and about 15 to about vol. % of silica fume, wherein all volume percentages unless otherwise indicated are based on the total volume of the concrete material.

The invention discloses a magnetic drive porous spiral nano motor for active antigen delivery and a preparation method and application thereof. The magnetic drive porous spiral nano motor comprises a nickel layer, porous spiral silicon and surface antigen ovalbumin OVA, and the nickel layer modifies the surface antigen ovalbumin OVA on the surface of the porous spiral silicon. The preparation method comprises the following steps: S1, adding tetraethyl orthosilicate into a water solution containing sodium hydroxide, perfluorooctanoic acid and hexadecyl trimethyl ammonium bromide by adopting a sol-gel method, mixing, stirring and reacting, and calcining to obtain a spiral siliceous mesoporous material HR; s2, a metal nickel layer is formed on the surface of the spiral siliceous mesoporous material through magnetron sputtering, and the HR-Ni spiral magnetic drive motor is obtained; s3, surface antigen ovalbumin OVA is modified for the HR-Ni spiral magnetic drive motor, and therefore the magnetic drive porous spiral nano motor is obtained. The nano motor has high antigen loading efficiency and high cell uptake efficiency, and can enhance cross delivery of antigens.

The invention provides a hydration heat in-situ self-foaming light composite board and a preparation method thereof. The light composite board is prepared from the following raw materials: an inorganic cementing material, expanded polystyrene particles and an active siliceous material, wherein the inorganic cementing material comprises quick lime. According to the preparation method, hydration heat released in the hydration process of quick lime is used as an endogenous heat source to induce expanded polystyrene particles to generate in-situ expansion foaming in a system, and meanwhile, a high-alkalinity environment is formed to promote cementitious materials such as silicon hydrochloric acid cement and active siliceous materials to generate inorganic gel on the surfaces of the expanded polystyrene particles; and a composite interface structure wrapped by inorganic gel is formed, so that the light weight of the board is reduced, the synergism and unification of the light structure, the mechanical property and the fireproof property are realized, and the organic-inorganic interface stability and the structural integrity are improved.

The application relates to a preparation method of silica gel, which extracts siliceous elements from waste concrete rich in SiO2, Al2O3 and other components to prepare inorganic silica gel, and comprises the following steps: crushing, calcining, peeling, ball milling, preparation of a silicon-containing mixture, sol-gel, centrifugation, drying and the like; the application rationally utilizes the component characteristics of the waste concrete block, and prepares inorganic silica gel by taking the separated old hardened cement stone as a silicon source, has the advantages of simple process, low synthesis temperature, low energy consumption, green environmental protection, and the prepared inorganic silica gel has the advantages of large specific surface area and uniform pore structure; the method saves the production cost, effectively improves the economic added value and utilization rate of the waste concrete and the old hardened cement stone, avoids land resource occupation and environmental pollution, and has important environmental protection significance and application value.

A reinforced elastomeric article with a film layer having a microporous matrix of ultra-high-molecular-weight polyolefin compounded with a siliceous filler. The article may be a belt, hose, tire or the like. The film layer may reside on a contact surface or other surface of the article or may be embedded within the elastomeric article.

The invention provides an insulation board and a raw material composition, a preparation method and application thereof. The insulation board raw material composition comprises a first component and a second component, the first component comprises polyol and isocyanate, and the second component comprises siliceous hollow microspheres, a siliceous substance and a calcareous substance; the calcium substance comprises calcium oxide and / or calcium hydroxide; the content of the siliceous hollow microbeads is 30%-90%; the particle size of the siliceous hollow microbeads is 10 to 150 meshes; the mass ratio of the first component to the second component is (2-18): (82-98). The insulation board prepared from the insulation board raw material composition meets the requirement of light weight, has excellent thermal insulation performance, fireproof performance and physical strength (compression strength and tensile strength), and has excellent comprehensive performance; in addition, the durability of the obtained insulation board is good.