490 results about "Nanoceramic" patented technology

The invention relates to the technical field of composite film preparation, in particular to a multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film and a preparation method thereof.The multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film comprises a base material layer, a gas barrier layer, a bonding transition layer and a nano ceramic functional coating; the base material layer comprises the following components in parts by mass: 80-100 parts of biaxially oriented polypropylene; 20 to 30 parts of metallocene linear low density polyethylene; 5 to 8 parts of nano titanium dioxide; 0.5 to 1 part of beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid; and 0.3 to 0.6 part of calcium stearate. Through the multi-layer co-extrusion and gradient curing technology and the five-layer co-extrusion technology, it is ensured that the thickness of a base film is uniform and interlayer bonding is firm, the adhesive force of the coating is enhanced through plasma surface treatment, and activity retention and uniform distribution of functional components are guaranteed through the segmented curing strategy of the nano ceramic coating; compared with a traditional hot-pressing compounding or solvent coating process of the composite film, the energy consumption and the solvent residue risk are greatly reduced, meanwhile, the production efficiency and the product consistency are improved, and large-scale application is provided for medicine packaging.

The invention belongs to the field of metal material processing, and particularly relates to a nuclear power nickel base alloy welding wire and a preparation method thereof.The nuclear power nickel base alloy welding wire comprises, by weight, 0.01%-0.05% of C, 0.10%-0.30% of Si, 28.5%-30.5% of Cr, 7.0%-11.0% of Fe, smaller than or equal to 0.10% of Co, 0.50%-1.00% of W, 3.0%-4.0% of Mo, 0.005%-0.010% of B, 0.1%-0.3% of Al, 0.1%-0.2% of Ti, 0.005%-0.020% of Zr, 2.0%-2.5% of Nb, 0.1%-0.5% of Ta, 0.20%-0.30% of RE, smaller than 0.005% of S, smaller than 0.005% of P, 2.0%-4.0% of nano ceramic materials and the balance Ni, the nickel-based alloy welding material is prepared through the steps of smelting, high-low temperature refining, annealing, forging, rolling, multi-pass drawing, annealing, solid solution-aging treatment, acid pickling, coating and plating, and the problems that in the prior art, when used for welding, a nickel-based alloy welding material is prone to cracks, and the strength is low due to hot corrosion can be effectively solved.

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a multilayer polypropylene capacitance film, which comprises the following steps: S1, raw material preparation: preparing basic resin, a nano ceramic filler, a nucleating agent and an antioxidant into multilayer raw materials respectively; s2, fusing multiple layers of raw materials by an independent screw extruder, and compounding by a co-extrusion die head to form a film blank; and S3, carrying out air ring gradient cooling on the film blank. And S4, longitudinally and transversely stretching the film blank. And S5, performing heat setting in a segmented heating furnace, and performing corona treatment to improve surface energy. And S6, segmentally curing the moisture-proof coating by using an infrared oven. The multilayer heterostructure is adopted, the comprehensive performance of the capacitor film is improved through material matching, the dielectric constant, the breakdown strength and the moisture resistance are enhanced, and the problem of considering the dielectric property and the mechanical property is solved. The innovative process guarantees stable performance, is compatible with an existing production line, can realize large-scale production, meets the requirements of fields such as new energy and the like, and provides a feasible scheme for localization of high-performance capacitor films.

The invention relates to the technical field of nano ceramic materials, and particularly discloses a self-cleaning antibacterial functional ceramic which is prepared by the following steps: S1, mixing titanium dioxide powder, a composite binder, functional gel, a plasticizer and a solvent, and performing ball milling for 18-20 hours to obtain composite slurry; s2, putting the composite slurry into a mold, and carrying out mold pressing and drying to obtain a green body; and S3, placing the green body in a high-temperature sintering furnace, carrying out high-temperature sintering, and cooling to room temperature to obtain the self-cleaning antibacterial functional ceramic, according to the invention, functional gel and a composite binder are added, and the functional gel is obtained by mixing and reacting composite modified nano zinc oxide, a cross-linking agent and an alumina precursor; the composite binder is prepared by mixing a polyvinyl alcohol aqueous solution, an aluminum dihydrogen phosphate aqueous solution, silica sol and a tackifying component, and through the synergistic effect of the substances, the mechanical property and the antibacterial property of the functional ceramic are improved.

The invention relates to the technical field of ship protection materials, in particular to a ship accessory rust-proof coating and a preparation method thereof.The ship accessory rust-proof coating comprises the following three-layer structure and components from inside to outside: a basic corrosion-resistant layer comprises 10-30 parts of a nano ceramic material; 5-15 parts of a rare earth oxide; 0.5 to 1.5 parts of aminated graphene oxide; 40 to 60 parts of fluorocarbon resin; 20 to 30 parts of epoxy-polyurethane hybrid resin; 3-8 parts of a zinc phosphate corrosion inhibitor; 2-5 parts of a self-repairing microcapsule; 1-3 parts of a photoinitiator; the interface transition layer comprises the following components in parts by weight: 3-5 parts of gamma-aminopropyltriethoxysilane; 2-5 parts of organic silicon resin coated copper powder; the antifouling surface layer comprises the following components in parts by weight: 10-15 parts of Cu coated SiO2 core-shell particles; 10 to 15 parts of a copolymer of polydimethylsiloxane and methyltrimethoxysilane; and 1-3 parts of an antifouling auxiliary agent. According to the multifunctional protective coating for the ship, through the synergistic effect of multiple components, comprehensive improvement of corrosion resistance, pollution resistance, self-repairing and construction efficiency is achieved, and remarkable technical progress and practical value are shown.

The invention discloses a double-component reinforced 5Y-PSZ dental ceramic material and a preparation method thereof, and relates to the technical field of ceramic material preparation. The method comprises the following steps: mixing ZrCl4 and deionized water, and dropwise adding an ammonia water solution to prepare m-ZrO2 nano ceramic powder; zrOCl2. 8H2O, Y (NO3) 3.6 H2O and deionized water are mixed, the m-ZrO2 nano ceramic powder and polyethylene glycol 2000 are added, and the material is prepared through calcination, spray granulation, hot-pressing presintering and high-temperature sintering. According to the 5Y-PSZ dental ceramic material disclosed by the invention, the nano-scale m-phase ZrO2 is adopted as a reinforcing material and is dispersed and distributed inside the 5Y-PSZ, and through volume expansion generated by t-m phase change of the m-phase ZrO2, the anti-aging performance is guaranteed, and meanwhile, the reinforcement of the 5Y-PSZ dental ceramic material is realized. The invention solves the problem of insufficient strength of the 5Y-PSZ dental ceramic material in the prior art.

The invention discloses a production process of high-strength anti-distortion cold-rolled strip steel. The production process comprises the links of raw material preparation, cold rolling, heat treatment, surface treatment and quality detection. Selecting medium-carbon steel with specific components as raw materials, and controlling the tolerance of hot-rolled strip steel; a six-roller unit is adopted for multi-pass rolling in cold rolling, and a plate shape control technology is matched; continuous annealing and gradient quenching-isothermal tempering are applied to heat treatment, so that a specific structure gradient is formed, and the distortion rate is reduced; the surface is subjected to acid pickling, hot galvanizing and a nano ceramic composite coating, so that the corrosion resistance and the wear resistance are improved; and the quality is guaranteed through online detection and sampling inspection. The strip steel produced through the technology is high in strength, good in toughness, high in corrosion resistance and suitable for the high-requirement field.

The invention belongs to the technical field of thermal power heating surface treatment, and provides a multi-layer composite self-repairing anti-oxidation coating for a boiler heating surface and a preparation method of the multi-layer composite self-repairing anti-oxidation coating aiming at the technical problems that a thermal power boiler heating surface protective coating is insufficient in bonding strength, insufficient in long-term anti-oxidation capacity and concentrated in interface stress among multi-layer structures. Comprising a bonding layer, a gradient transition layer, a self-repairing functional layer and a ceramic surface layer which are sequentially arranged from inside to outside. The self-repairing functional layer is made of NiCoCrAlY alloy, the bonding layer is made of NiCrAlY alloy, the gradient transition layer comprises four layers of gradient transition layer units, each layer of gradient transition layer unit comprises a gradient composite structure of NiCrAlY and nano Al2O3, the self-repairing functional layer comprises NiCoCrAlY serving as a base body, thermal response type microcapsules are embedded in the NiCoCrAlY base body, and the ceramic surface layer comprises a nano ceramic material composed of Cr, Co, Ni, Fe, Al, Ti and B elements.

The invention relates to the technical field of batteries, in particular to a lithium ion battery diaphragm and a preparation method thereof.The lithium ion battery diaphragm comprises a porous base membrane and a high-temperature-resistant bonding coating covering the surface of one side or two sides of the porous base membrane; the high-temperature-resistant bonding coating is prepared from the following raw materials in parts by weight: 15-20 parts of modified polymer emulsion, 60-80 parts of inorganic nano ceramic particles, 3-5 parts of fiber polymer, 3-5 parts of a binder, 0.1-0.5 part of an auxiliary agent and 20-30 parts of deionized water. According to the lithium ion battery diaphragm provided by the invention, through the modified polymer emulsion, the air permeability value after cold pressing and the cold pressing cohesive force are improved; meanwhile, the inorganic nano ceramic particles and the fiber polymer are added, so that the high-temperature resistance of the diaphragm is improved, and the safety performance and the cycle performance of the battery are effectively improved.

The invention relates to the technical field of magnet materials, and discloses a high-temperature-resistant neodymium-iron-boron magnet and a preparation method of the high-temperature-resistant neodymium-iron-boron magnet. The high-temperature-resistant neodymium-iron-boron magnet comprises the following components in parts by weight: 25-30 parts of neodymium, 60-65 parts of iron, 1.0-2.0 parts of boron, 3.0-5.0 parts of lanthanum, 0.5-2.0 parts of zirconium, 0.5-1.0 part of molybdenum and 0.1-0.5 part of nano ceramic particles, and the invention further provides a preparation method of the high-temperature-resistant neodymium-iron-boron magnet. S1, preparing and mixing alloy raw materials; s2, nano ceramic coating treatment is carried out; s3, magnetic field assisted pressing forming; and S4, rapid induction sintering. Through the magnetic field assisted directional pressing process, effective control over grain orientation in the pressing forming stage is achieved, magnetic domain arrangement is more ordered, and the residual magnetism and the energy product are improved. Different from a forming mode with disordered grain directions and poor magnetic anisotropy in an existing common cold pressing process, the technical defect that the utilization rate of magnetic performance is low due to poor orientation is overcome.

The invention relates to the technical field of wind power and power grid equipment anti-icing, and discloses a fluorosilicone oil microcapsule anti-icing coating for wind power and power grid equipment. Comprising the following components which are independently subpackaged: a component A, namely a nano ceramic pre-dispersion: 20-30 parts of methyltrimethoxysilane, 5-8 parts of tetraethoxysilane, 40-60 parts of isopropanol and 10-15 parts of silicon dioxide nanoparticles with perfluoroalkyl grafted on the surfaces; the component B is microcapsule dry powder: 25-40 parts of mesoporous alumina microcapsules filled with fluorosilicone oil, 1-4 parts of amino modified carbon nanotubes and 2-5 parts of an oxygen vacancy defect type titanium dioxide photocatalyst, the microcapsules are triggered to release the fluorosilicone oil through the volume expansion rate of a thermal expansion layer and stress sensitive layer composite wall material at low temperature, and meanwhile, when ice pressure exists, the stress sensitive layer can release the fluorosilicone oil, so that the stress sensitive layer can release the fluorosilicone oil. And the polydopamine-coated aluminum oxide layer is elastically deformed to synergistically release the fluorosilicone oil to form a dual-mode anti-icing mechanism.

The present invention relates to the field of ceramic technology, and more specifically, to an alumina ceramic fiber board with a fireproof and heat-insulating function and a nano-ceramic coating, which sequentially includes a nano-ceramic coating and an alumina ceramic fiber board from top to bottom; for the nano-ceramic coating, calculated by mass, the raw materials include: 50-70 parts of an adhesive, 10-20 parts of hydroxylated layered Ti3C2 / silica hollow spheres / ceramic particles, 0.1-0.5 parts of 2-acrylamido-2-methylpropanesulfonic acid sodium salt, 0.01-0.1 parts of an initiator, and 10-20 parts of water; the present invention solves the problem that the ceramic fiber board in the prior art cannot meet the fireproof and heat-insulating properties required for ceramic fiber boards in the construction field, and at the same time has excellent adhesion, corrosion resistance, strength, antibacterial property, and hydrophobic and oleophobic properties.

The invention belongs to the technical field of preparation of high polymer materials, and provides a preparation method of a wear-resistant high polymer material which comprises a nano ceramic layer and a dual-network polymer matrix which are distributed in a gradient manner, the gradient distribution nano ceramic layer is formed by surface-functionalized Al2O3-Si C hybrid nanoparticles in concentration gradient distribution in the longitudinal direction of the material, the dual-network polymer matrix is formed by cross-linking polyurethane and epoxy resin through an interpenetrating network structure, a polyurethane phase provides elasticity, and an epoxy resin phase provides rigidity; according to the preparation method, gradient mechanical property optimization can be achieved, and excellent interfacial compatibility and an efficient preparation process are achieved.

The invention belongs to the technical field of thermal power heating surface treatment, and provides a boiler heating surface high-temperature corrosion protective coating and a preparation method thereof in order to solve the technical problems that in the prior art, a nano ceramic coating and a metal alloy coating for treating thermal power boiler heating surface high-temperature corrosion are insufficient in adhesive force, prone to falling off and short in protection service life. Through multi-layer structure design and technological parameter optimization, a coating system has continuous thermal expansion coefficient gradient distribution in the interval of 500-900 DEG C, the metal bonding layer at the bottom layer has a pore structure which can effectively absorb thermal stress, the nano ceramic layer at the surface layer can maintain high-temperature stability, and it is verified that the overall bonding strength is larger than or equal to 35 MPa, and the thermal expansion coefficient is larger than or equal to 10%. Compared with a traditional single-layer coating, the adhesive force is improved by 200% or above, and therefore the technical problems that in the prior art, adhesive force is insufficient, thermal stress is not matched, and high-temperature softening fails can be effectively solved.

The invention relates to the technical field of radiation protection equipment, and provides a multi-scale self-adaptive fixing system for a lead plate, in the aspect of lead plate fixing, through a three-degree-of-freedom structure and a precise force control system of a shape memory alloy driving clamp, the clamping angle and force can be adjusted in a self-adaptive manner, the plastic deformation of the lead plate is effectively avoided, and the service life of the lead plate is prolonged. The problem that a traditional clamp is poor in fixing precision is solved. And due to the innovative structure of the modular quick connection assembly, the assembly and the disassembly are convenient, the seam leakage rate is greatly reduced, and the radiation protection performance is improved. In terms of environmental adaptation, the temperature and humidity cooperative control system can accurately adjust the temperature of the lead plate, and the self-repairing nano ceramic anti-corrosion coating can effectively isolate corrosion ions and automatically repair the coating. The intelligent monitoring and early warning system utilizes a multi-dimensional sensor, edge calculation and digital twinning technology to monitor the state of equipment in real time, quickly diagnose faults and perform graded early warning, so that the safe and stable operation of the system is guaranteed, and the reliability and the intelligent level of the equipment are greatly improved.

The invention relates to the technical field of battery materials, in particular to a para-aramid lithium battery diaphragm and a preparation method thereof. The para-aramid lithium battery diaphragm comprises para-aramid slurry and a base membrane, the para-aramid slurry is coated on the two sides of the base membrane to form para-aramid coatings, and the para-aramid slurry comprises the following raw materials in parts by weight: 20-40 parts of modified para-aramid polymer liquid, 10-20 parts of nano ceramic composite material powder and 10-18 parts of a solvent; the nano ceramic composite material powder is prepared from the following raw materials in parts by weight: 50 to 100 parts of nano aluminum oxide, 8 to 12 parts of nano zirconium dioxide, 0.3 to 0.8 part of yttrium oxide, 1 to 5 parts of magnesium nitrate hexahydrate, 0.1 to 1 part of polyacrylic acid, 1 to 2 parts of ammonia water, 1 to 3 parts of coupling agent and 20 to 30 parts of silicon dioxide; the nano ceramic composite material powder is added into the para-aramid slurry, so that the para-aramid diaphragm has better thermal stability, and the phenomenon of thermal shrinkage of the diaphragm at high temperature is reduced.

The invention belongs to the technical field of composite material manufacturing, and discloses a structural battery integrated composite board and a forming method and application thereof. According to the composite board, carbon fiber reinforced materials are adopted as positive and negative electrodes, glass fiber materials are adopted as a diaphragm and an insulating layer, epoxy resin-based solid-state structure electrolyte is adopted as a bonding packaging medium, and a curing agent, ionic liquid, electrolyte lithium salt, nano ceramic particles and other auxiliaries of specific types and proportions are introduced into epoxy resin; the multifunctional modification of the resin matrix is realized. And meanwhile, doping and surface grafting modification are performed on the electrode material, so that the energy density and the mechanical strength of the battery are improved. And further constructing a low-temperature formed metal or carbon-based circuit layer on the outer surface of the structural battery to form an integrated complex comprising the circuit board, the structural battery and the bearing structure. The composite board satisfies dielectric insulation and reliability, realizes integrated energy supply and signal processing, and is widely applied to weight and volume sensitive fields such as aerospace and new energy automobiles.

The invention discloses an insulating nano ceramic resin composite coating. The preparation method comprises the following steps: 1, mixing methyl methacrylate and butyl acrylate, and dropwise adding the mixture into an aqueous solution containing an emulsifier, an initiator and a buffer agent under a protective atmosphere for reaction to obtain a seed emulsion; and 2, emulsifying the modified filler, methyl methacrylate, butyl acrylate, an emulsifier and water, adjusting the pH value, and dropwise adding into the seed emulsion and the initiator under a protective atmosphere to react. And then cooling and adding a redox initiation system for continuous reaction to finally obtain the composite coating. The preparation method has the beneficial effects that the hexagonal boron nitride nanosheets are subjected to surface functionalization treatment by synthesizing a multifunctional modifier, so that the dispersity and interface bonding performance of filler in a resin matrix are remarkably improved, and the coating has excellent insulativity, strong adhesive force, good flame retardance and outstanding corrosion resistance at the same time.

The invention discloses a ceramic diaphragm as well as a preparation method and application thereof. The ceramic diaphragm comprises a base membrane, a first coating arranged on the surface of at least one side of the base membrane, and a second coating arranged on the surface of the first coating, the first coating comprises modified ceramic, a dispersing agent, a thickening agent, a binding agent and a wetting agent; the second coating comprises porous nano ceramic, a dispersing agent, a thickening agent, a binding agent and a wetting agent. The ceramic diaphragm disclosed by the invention has good high temperature resistance, and the puncture resistance of the ceramic diaphragm is improved due to the addition of the modified ceramic containing the polymer coating layer; meanwhile, by adding the porous nano ceramics with different particle sizes, the heat resistance of the diaphragm is improved under the condition that the air permeability of the diaphragm is not influenced, and the stability of the battery performance is ensured.

The invention discloses a preparation method of a MgO-MgA12O4-ZrO2 nano ceramic eutectic composite material. The preparation method comprises the following steps: S1, preparing powder; s2, flash firing preparation; and S3, high-temperature melting preparation. According to the invention, two technologies of flash sintering and high-temperature melting are combined, the problems of high sintering temperature, easy growth of crystal grains, difficult densification and the like of the traditional eutectic ceramic are solved, and an excellent composite material with a nanoscale eutectic structure is finally obtained; a nanocrystalline blank obtained through flash sintering is crushed and then subjected to high-temperature melting, microdefects and air holes possibly existing in the flash sintering blank are eliminated, the chemical components and the microstructure of a final product are more uniform, and compared with traditional selective laser melting, the method is more convenient and faster to implement and lower in cost.

The invention discloses an integrated membrane electrode assembly and a preparation method, the integrated membrane electrode assembly comprises a porous catalyst layer, a diaphragm hole layer and a diaphragm skin layer which are connected in sequence, and a support grid is arranged in the diaphragm hole layer; the average thickness of the porous catalyst layer is 50-150 [mu] m, the average pore size of the porous catalyst layer is 1-2 [mu] m, the porosity is 35-50%, and the porous catalyst layer is an adhesive film material containing transition metal powder; the diaphragm hole layer and the diaphragm skin layer are both made of a nano-ceramic-containing adhesive film material; wherein the adhesive film material is a high-molecular polymer containing a film-forming additive. The integrated membrane electrode assembly is prepared through one-time forming of the membrane electrode structure, the integrity of the membrane pore channel structure is guaranteed, meanwhile, the prepared catalyst layer has a porous structure, the preparation efficiency of the alkaline water electrolysis membrane electrode assembly is improved, and the electrolysis performance of the alkaline water electrolysis membrane electrode assembly applied to the water electrolysis process is improved.

The utility model discloses a uniform mixing device for nano ceramic spraying castable, which belongs to the technical field of nano ceramic spraying castable production and comprises a base plate, a supporting component is arranged below the base plate, a mixing barrel is fixedly arranged on the upper surface of the base plate, a uniform mixing component is arranged in the mixing barrel, and the supporting component is arranged on the lower surface of the base plate. A driving device used for driving the uniform mixing assembly to rotate is fixedly arranged on the lower surface of the base plate, an extension plate is fixedly arranged on the right side wall of the base plate, a water storage tank is fixedly arranged on the upper surface of the extension plate, a water pump is arranged in the water storage tank, a water guide pipe is arranged at the upper end of the water storage tank in a communicating mode, and a water guide assembly is arranged on the side wall of the upper end of the mixing barrel. The first cross rod, the second cross rod and the third cross rod are driven by the rotating shaft to rotate, and the lengths of the first cross rod, the second cross rod and the third cross rod are different, so that the nano ceramic spraying castable can be uniformly stirred and mixed at one time, the rework is greatly reduced, and the working efficiency is improved.

The invention discloses a high-temperature-resistant maintenance-free nano dust filtration system and method, and belongs to the technical field of dust filtration systems. The system comprises a dust filtering main body, a nano ceramic filter element assembly, an automatic blowback system and a control system. The nano ceramic filter element is sequentially provided with an outer coarse filter layer, a middle medium filter layer and an inner fine filter layer from outside to inside, so that a radial gradient aperture structure is formed, and graded interception of dust is realized. The automatic blowback system is configured in a way that double electromagnetic pulse valves are connected in series to form double-peak collaborative blowback airflow which is firstly subjected to high-pressure impact stripping and then is subjected to high-flow removal. The control system continuously collects pressure difference data and calculates the pressure difference change rate, the remaining time for reaching a pressure difference threshold value is predicted according to the pressure difference change rate, the back flushing triggering opportunity is judged, self-adaptive dust removal control is achieved, meanwhile, the pressure difference recovery rate before and after back flushing is calculated, and back flushing parameters are automatically adjusted. According to the invention, high-efficiency purification of high-temperature dust-containing gas and long-term maintenance-free operation of the system are realized, and the service life of the filter element is remarkably prolonged.

The invention relates to the technical field of special functional coatings, in particular to a water-based environment-friendly coating with high-temperature resistance, corrosion resistance and high-temperature discoloration resistance as well as a preparation method and application of the water-based environment-friendly coating. The coating comprises the following components in parts by weight: 100 parts of modified silica sol-organic silicon hybrid resin, 10-30 parts of nano ceramic powder, 15-25 parts of layered silicate, 5-15 parts of a composite corrosion inhibitor, 1-3 parts of a fumed silica thixotropic agent and 20-40 parts of deionized water. Mixing the modified silica sol-organic silicon hybrid resin with deionized water, and uniformly stirring and dispersing; the preparation method comprises the following steps: premixing the high-temperature-resistant inorganic toner and the rare earth stabilizer, sequentially adding the nano ceramic powder, the layered silicate, the composite corrosion inhibitor and the fumed silica thixotropic agent, and dispersing at a high speed for 30-60 minutes; grinding until the fineness is less than or equal to 20 microns, and filtering to obtain the coating. The water-based paint is especially suitable for petrochemical reaction kettles, high-temperature pipelines and other harsh environments requiring long-term appearance maintenance, and the technical problems that traditional water-based paint is insufficient in temperature resistance, prone to corrosion and discoloration and the like are solved.

The invention belongs to the field of aluminum-based composite materials, and particularly relates to a high-toughness corrosion-resistant aluminum-based composite material for aviation and a preparation method of the high-toughness corrosion-resistant aluminum-based composite material. According to the preparation method, K2ZrF6, B2O3 and Al are taken as reactants, reaction salt powder is uniformly dispersed by adopting semi-solid mechanical stirring, and ZrB2 and Al2O3 nano ceramic particles are prepared by combining a melt direct reaction method; after the in-situ reaction is finished, an Al-20Er rare earth intermediate alloy is added, melt is purified, crystal grains are refined, and wettability and dispersity of nano-particles are improved, so that in-situ coupling strengthening and refining of the nano-particles and rare earth on a matrix are achieved. And meanwhile, under the dual action of a rare earth precipitated phase and regression re-aging heat treatment, grain boundary precipitated phases are discontinuously dispersed and distributed, formation of an anode channel in the material corrosion process is hindered, then the mechanical property and corrosion resistance of the composite material are improved, and finally the high-toughness corrosion-resistant aluminum-based composite material is obtained.

The invention relates to the field of plastic trays, and discloses a modified material of a shared plastic tray and a preparation method of the modified material. The modified material comprises the following raw materials in parts by weight: 60-80 parts of high-density polyethylene, 10-20 parts of polypropylene, 5-15 parts of reinforced fibers, 0.5-1.5 parts of an antioxidant, 0.3-1.0 part of an ultraviolet light absorber, 0.5-1.0 part of a coupling agent, 2-5 parts of an inorganic filler, 0.5-1.0 part of a lubricant and 1-2 parts of a heat stabilizer, and the reinforced fibers are composed of chopped glass fibers and chopped carbon fibers. By adding the antioxidant and the ultraviolet light absorber, oxidation free radicals are effectively captured, ultraviolet energy is absorbed, material degradation is inhibited, meanwhile, an aluminum oxide-silicon dioxide composite nano ceramic coating formed through surface strengthening treatment further blocks erosion of ultraviolet rays and the external environment to the material, and the aging resistance of the tray is remarkably improved.

The invention belongs to the field of metal material processing, and particularly relates to a nickel base alloy welding material for a pressure vessel and a preparation method thereof.The nickel base alloy welding material for the pressure vessel comprises, by weight, 0.01%-0.10% of C, 0.10%-0.20% of Si, 20.0%-22.0% of Cr, 17.0%-20.0% of Fe, 2.5%-4.0% of Co, 0.20%-1.00% of W, 8.0%-10.0% of Mo, 0.005%-0.050% of B, 2.0%-4.0% of the total amount of Al and Ti, 0.10%-0.50% of Zr, 0.2%-0.5% of V, 2.0%-2.5% of Nb, 0.01%-0.05% of Ta, 0.20%-0.30% of RE, smaller than 0.005% of S, smaller than 0.005% of P, 2.0%-5.0 The nickel-based alloy welding material is obtained through smelting, high and low temperature refining, annealing, forging, rolling, multi-pass drawing, annealing and solid solution-aging treatment, and the problems that in the prior art, when a nickel-based alloy welding material is used for welding, air holes or cracks are generated due to oxidation easily, and the strength is low can be effectively solved.

The invention discloses a magnetic suspension rotor impeller, a pump head and a magnetic suspension pump, the magnetic suspension rotor impeller comprises a rotor main body and a magnetic suspension rotor, the rotor main body is cylindrical, a first cavity is formed in the rotor main body, and the magnetic suspension rotor is sealed in the first cavity; the magnetic suspension rotor comprises a rotor magnet and a nano ceramic composite coating, and the nano ceramic composite coating comprises a metal coating in contact with the rotor magnet and a nano ceramic coating arranged outside the metal coating. By forming the nano ceramic composite coating on the surface of the rotor magnet, the problem that the plastic coating cannot play a role in protection due to damage to the plastic coating in the assembly process is solved, so that the service life of the magnetic suspension rotor impeller can be prolonged, metal coating ions are prevented from being separated out to pollute a pumping medium, and the cleanliness of the pumping medium is ensured.

The invention discloses high-entropy rare earth phosphate nano ceramic powder and a preparation method thereof, the high-entropy rare earth phosphate nano ceramic powder with a xenotime structure is synthesized by combining an in-situ coprecipitation method with a low-temperature calcination process, and the average grain size of the nano ceramic powder is 45-60 nm; h3PO4 is used as a phosphorus-containing raw material and a precipitant at the same time, so that the problem of excessive impurity substances in a sample caused by introduction of other precipitants such as ammonia water and the like is avoided; and precipitates are collected in a direct evaporation manner, so that the problem of loss of part of component elements in the filtering process is completely prevented, the proportion of each element in the nano powder is consistent with the expected height, and each element is uniformly distributed. According to the method, five elements with different ion radiuses and masses are added into REPO4 crystal lattices, so that the configuration entropy and the lattice distortion degree of a sample are remarkably improved, the stability and the phonon scattering intensity of xenotime type crystal lattices in the sample are improved, and the heat conductivity of the sample is reduced.

The invention relates to the technical field of special low-carbon building materials, in particular to high-performance anti-penetration concrete and a preparation method thereof.The high-performance anti-penetration concrete is prepared by taking industrial solid waste as a cementing material, taking waste nano ceramic balls, carbonized steel slag coarse aggregate and modified steel slag fine aggregate as aggregate and matching basalt fiber, wollastonite fiber and nano carbon fiber for composite toughening; a water reducing agent and a retarder are added as additives, so that the high-performance anti-penetration concrete which is good in fluidity, high in mechanical property and excellent in anti-penetration performance is prepared.