2785 results about "Nano al2o3" patented technology

The invention relates to a preparation method of nickel-coated alumina oxide powder, in particular to the preparation method of nickel-coated aluminum oxide powder for thermal spraying in aviation, aerospace and military fields. The invention is characterized in that: a suspension is made from a mixing liquid of nano-aluminum oxide and dispersant, stirred and added with nickel salt solution at the same time, and the obtained mixture liquid is dropped with ammonium water after being fully stirred, added with distilled water, when dark blue mixing solution C of nickel ammonia complex ([Ni (NH3)) 2+and alumina oxide is obtained; the mixing solution C is aged by water, filtered, washed and dried, and a green middle coated product is obtained; the green middle coated product is further reduced and roasted, finally, black nickel-coated aluminum oxide powder is prepared. The nickel-coated aluminum oxide powder prepared through the invention has uniform granularity, with average size less than or equal to 1.0Mum, and can enhance the application performance of nano-alumina and expand the application of nano-aluminum oxide; the product is mainly used for aviation, aerospace and military materials and other high-tech fields. The method of the invention is simple, reproducible and easy to be industrialized.

The invention provides a high wear-resistant wood-plastic composite and a preparation method thereof, and relates to a composite obtained by mixing modified plant fiber powder, modified nano ceramics particles and plastic powder. The high wear-resistant wood-plastic composite comprises the modified plant fiber powder, the modified nano ceramics particles, the recycled plastic powder and the like, wherein the modified nano ceramics particles comprises modified nano Al2O3, modified nano Si3N4, modified nano SiC or the mixture thereof, which can obviously improve the microhardness of the wood-plastic composite, reduce the wear rate and improve the mechanical property. The high wear-resistant wood-plastic composite is prepared from the components by the common melt-mixing method in the plastic processing. The surface hardness and the wearability of the wood-plastic composite are greatly increased, and the strength and the toughness are also greatly improved, so that the overall performance of the wood-plastic composite is greatly enhanced. The wood-plastic composite can be used in the fields of construction material, furniture, package and the like.

The invention discloses a novel nano modified antimicrobial water-based woodware paint which comprises acrylic resin emulsion, polyurethane resin emulsion, nano silica sol, nano aluminum oxide, nano titanium dioxide, nano silver, film-forming assistant, defoaming agent, wetting and dispersing agent, leveling agent, thickening agent, wax emulsion and pH regulator. The nano materials dispersed in the water-based paint enhance the hardness of the coated film, so that the coated film has excellent yellowing resistance, aging resistance and mold resistance.

The invention relates to a titanium silicate molecular sieve catalyst and the preparation method and the application thereof. The catalyst comprises 25-65 percent of titanium silicate molecular sieve and 20-65 percent of nanometer alumina. The mechanical strength is 20-30N/cm<2>. Prepared by an extruded moulding method, the catalyst has the characteristics of high mechanical strength, high catalytic activity and selectivity, and the like, and is especially applied to catalyzing 3-chloropropene oxidation reaction to prepare epichlorohydrin.

The invention provides a high-rate charge-discharge lithium-ion battery and a preparation method thereof. The anode active material of the lithium-ion battery is lithium manganate; the cathode active material is selected from one or more of mesocarbon microbeads, artificial graphite or natural graphite coated by mesophase pitch; a conductive agent is selected from one or more of conductive graphite, conductive carbon black, nano Ag, nano SiO2 or nano Al2O3. The preparation method of the lithium-ion battery comprises the preparation of the anode plate, the parathion of the cathode plate and the assembly of the battery. The lithium-ion battery has the advantages of high-rate charge-discharge performance, long cycle life, high capacity, safe use, environmental protection, low cost and the like. The preparation method has the advantage of simple and easy process operation, and is applicable to the mass production.

The invention discloses an all-solid polymer electrolyte, and a preparation method and an application of the all-solid polymer electrolyte, and belongs to the field of lithium ion batteries. The all-solid polymer electrolyte comprises polyethylene oxide, lithium salt, inorganic nano particles and ion liquid, wherein a mass ratio of the lithium salt to polyethylene oxide is 0.1-0.5; the mass sum of the inorganic nano particles and the ion liquid is 10-30% of the mass of the all-solid polymer electrolyte; the lithium salt comprises one or several of bistrifluoromethane sulfonimide lithium salt, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluorophosphate, lithium hexafluoroarsenate, lithium trifluoromethanesulfonate and lithium bis borate; and the inorganic nano particles comprise one or several of nano aluminum oxide, nano silicon oxide, nano zirconium oxide and nano barium titanate. The all-solid polymer electrolyte has better mechanical strength and higher ion conductivity. The method is simple in technology and low in cost; and raw materials are easy to obtain.

The invention relates to negative-ion, far-infrared, antibacterial and anti-mite compound polyester fibers and a manufacturing method thereof. The compound polyester fibers are added with a negative-ion additive, a far-infrared additive and an antibacterial and anti-mite additive, wherein the negative-ion additive, the far-infrared additive and the antibacterial and anti-mite additive respectively account for 2%, 5% and 6% by mass in the compound polyester fibers; the negative-ion additive comprises an additive carrier and tourmaline negative-ion powder; the far-infrared additive comprises an additive carrier, Tai Chi stone powder, ZrO2 nano-powder, nano-silicon dioxide, nano-aluminum oxide, nano-manganese oxide and nano-calcium oxide; the antibacterial and anti-mite additive comprises an additive carrier, nano-Cu-ZnO compound particles, nano-titanium dioxide, nano-zinc oxide and nano-silicon dioxide; and the additive carrier is TiO2 hollow spheres.

The invention discloses a super weather-resisting, wear-resisting and anti-icing wind-powered blade coating and a preparation method thereof. A component A comprises the following compositions in percentage by mass: 27-44% of fluorocarbon resin, 10-25% of polyester resins, 0.5-2% of a silane coupling agent, 0.5-2% of a wetting dispersant, 0.5-2% of a thixotropic agent, 1-5% of nano titanium dioxide, 3-6% of nano alumina, 12-18% of a pigment, 5-10% of packing, 3-6% of extinction powder, 0.1-1% of an ultraviolet light absorber, 0.1-0.8% of a flatting agent, 0.01-0.4% of a defoaming agent and 5-10% of a diluent; and the component A and aliphatic isocyanate are proportioned according to a formula that -NCO/-OH = 1.05-1.2. The coating disclosed by the invention is outstanding in weather resistance and wear resistance, and can carry out long-acting protection on wind-powered blades and save the maintenance cost; the water contact angle is greater than or equal to 150 degrees, and the ice cover can be reduced by more than 50%; and the surface dry is implemented in 0.5 h, the hard dry is implemented in 24 h, and the coating can be subjected to brush coating, roll coating and spray coating, therefore, the coating is high in construction efficiency.

A pressure sensitive material used in a flexible touch sensor and a preparation method thereof are characterized in that: the material adopts carbon black, a silicon rubber composite system and added nano SiO2 or nano Al2O3 as raw materials; according to the preparation method, all raw materials are mixed in turn under normal temperature and normal pressure to obtain mixed solution which is injected into a touch sensor structural model, thereby curing forming is completed at room temperature. The pressure sensitive material, which has excellent touch sensing function and flexility, is suitable to be used in a touch sensor array structure designed at will; moreover, the preparation method has a simple process.

Relateing to the field of antibacterial materials, the invention specifically provides an efficient and environmentally-friendly antibacterial and mildewproof inorganic composite nano-powder slurry obtained through compounding nano-magnesium oxide and other nano-inorganic materials and its preparation method. The nano-powder slurry takes nano-magnesium oxide as the main body, which is then compounded with one or more inorganic materials of nano-zinc oxide, nano-titanium oxide, nano-copper oxide, nano-cuprous oxide, nano-silver oxide, nano-zinc sulfide, nano-zirconium oxide, nano-yttrium oxide, nano-alumina, and nano-calcium oxide so as to form the nano-powder slurry, which comprises, by weight percent: 0.1-40% of nano-magnesium oxide, 0.01-40% of other inorganic materials, 0.5-12% of a polymeric dispersant, and the balance a solvent. In the method, a nano-inorganic material enters a solution composed of the polymeric dispersant and the solvent by means of high speed dispersion according to a predetermined proportion, and after ball milling, the composite nano-powder slurry can be obtained. The composite nano-powder slurry can be applied in antibacterial coatings, deodorants, textiles, paper products, plastics, rubbers, water treatment agents, ship protective agents, cosmetics and other aspects.

The invention belongs to the field of machinery cutting cutter manufacturing, and relates to a preparation method for a laser cladding soft and hard composite coating self-lubricating cutter. A rake face coating of the cutter is a multi-layer structure. Firstly, a hard coating of nano Al2O3 ceramic or an ultrafine cemented carbide, etc. is clad on the rake face of the cutter by utilization of a CO2 laser synchronous feeding manner, and then a self-lubricating soft coating is clad by utilization of nickel-covered MoS2 powder or nickel-covered WS2 powder. The cutter has characteristics of good toughness, high hardness, a self-lubrication function, and the like. During a drying cutting process, the hard coating bears loads and the rake face self-lubricating soft coating has low shearing strength, thus reducing friction between the cutter and chips, reducing the cutting temperature and the cutting force, and therefore cutter abrasion is reduced. The cutter can be widely used for dry cutting and cutting machining of difficult-to-machine materials.

The invention discloses a thermostable white nano far-infrared ceramic powder and a preparation method thereof. The thermostable white nano far-infrared ceramic powder is prepared from the following components in percentage by weight: 20-30% of nano alumina, 3-8% of nano magnesia, 15-25% of nano monox, 10-20% of nano zirconia, 15-25% of nano zinc oxide, 7-10% of nano titanium oxide, 1-3% of nano rare earth oxide and 0.1-0.3% of nano precious metal oxide. In the invention, the nano rare earth oxide is one of yttrium oxide or lanthana or cerium oxide, and the nano precious metal oxide is one of platinum oxide or palladium oxide. The nano far-infrared ceramic powder can be subjected to subsequent processing at the high temperature of 1300-1450 DEG C, without reduction of radiance and radiation intensity, wherein the radiance can reach 0.90-0.94, and the nano far-infrared ceramic powder is white and can be widely applied to far-infrared household porcelain, wall and floor tiles, heating ceramic plates and high-temperature coating.

A nano alumina slurry composition for ceramics, paint, ink, etc is prepared from nano alumina (150 nm), high-molecular disperser, and solvent through sequentially and proportionally adding said disperser and alumina to solvent, high-speed dispersing at 400-3000 rpm for 10-60 min, and grinding for 20 min-24 hr. Its advantages are high content of solid, low viscosity and high stability.

The invention relates to an underfill adhesive and a preparation method thereof. The underfill adhesive comprises the following ingredients by weight percent: 30 to 70 percent of filler, 10 to 50 percent of epoxy resin, 2 to 20 percent of curing agent, 0.1 to 0.5 percent of catalyst, 1 to 15 percent of flexibilizer, 1 to 25 percent of diluting agent, 0.1 to 3 percent of dispersing agent, 0.05 to 1 percent of defoaming agent, 0.1 to 1 percent of coupling agent and 0.1 to 0.5 percent of pigment; the filler comprises a first component and a second component, wherein the first component is spherical silicon dioxide, and the second component is selected from one of spherical nano aluminum oxide, spherical nano boron nitride, spherical nano aluminum nitride, spherical nano silicon carbide, spherical nano silicon nitride and spherical nano diamond powder. The filler comprises the first component and the second component, and a heat conduction channel can be formed in the underfill adhesive, so that the heat conduction coefficient can be increased; and the underfill adhesive has high heat conductivity and can be widely applied to high-density systematic encapsulation.

The invention discloses a preparation method of a silicon-based anode material for a lithium ion battery. The preparation method comprises the following steps of using tetraethyl orthosilicate as a silicon source and nanometer aluminum oxide as a template agent to prepare a silicon dioxide coated nanometer aluminum oxide material, and then carrying out magnesiothermic reduction and acid treatment to obtain hollow porous silicon; coating the surface of the hollow porous silicon with a layer of polydopamine by means of self-polymerization of dopamine; and carrying out thermal treatment to prepare hollow porous silicon coated with a polydopamine pyrolytic carbon layer, namely the silicon-based anode material for the lithium ion battery. A porous silicon hollow structure can be used for providing a certain expansion space for volume changes during the charging and discharging process of silicon, a nitrogen-doped carbon layer formed after thermal treatment on the polydopamine has higher mechanical property and electrical conductivity than conventional carbon layers, thus, the silicon-based anode material disclosed by the invention has favorable cycle performance and rate performance, and the retention rate of the charge specific capacity of the silicon-based anode material is still kept 90% after 50 times of cycling.

The invention relates to fluorinated polyurethane nanometer composite material and a preparation method thereof. The invention combines a polycondensation co-polymerization process and fluorine-introducing ultrasonic dispersion technology in the preparation process, nanometer aluminum oxide and nanometer silicon carbide are added and compounded in homogeneous phase in the polycondensation and the co-polymerization process, thereby obtaining nanometer particle reinforced fluorinated polyurethane nanometer composite material. A coating material with micron/nanometer dual structure surface and having hydro-oleophobic, wear resistant and erosion resistant functions, is obtained after film forming by spray coating on the base, drying and curing. The coating material prepared by the method has Hydro-oleophobic performance, and satisfies heat resisting, anticorrosion and wear resistant characteristics under hypergravity or high speed impact conditions.

The invention discloses a lithium titanate coated cathode and a lithium ion battery using the cathode. The lithium titanate coated cathode comprises a cathode piece and a lithium titanate coating, wherein the lithium titanate coating comprises the following components by weight ratio: 90-97% of nanomaterial and 3-10% of adhesive agent; the nanomaterial is nano lithium titanate, or a combination of nano lithium titanate and nano alumina and/or nano aluminium nitride; the adhesive agent is one of a combination of SBR (Styrene Butadiene Rubber) and CMC (Carboxyl Methyl Cellulose), PVDF (Polyvinylidene Fluoride), PVDF-HFP (Polyvinylidene Fluoride-Hexafluoropropylene), and polyacrylate; pulp of the lithium titanate coating comprises a solvent; the solvent is one of deionized water and NMP (N-Methyl Pyrrolidone); the solid content of the pulp of the lithium titanate coating is 20-60%; and the two sides of the cathode piece are coated with the pulp of the lithium titanate coating. The lithium ion battery using the lithium titanate coated cathode has better electrolyte wettability on the premise that a safety feature of the battery is unaffected, and can form a fully contacted liquid-phase interface with a diaphragm, and the multiplying power performance and the cycle performance of the battery can be improved.