47results about How to "No agglomeration" patented technology

The invention relates to a non-equimolar-ratio high-entropy thermoelectric ceramic and a preparation method thereof. The chemical formula of the non-equimolar-ratio high-entropy thermoelectric ceramic is (Ca1 / 3Sr1 / 3Ba1 / 3) 1-xLaxTiO3 (x = 0.1-0.4). Through presintering, spark plasma sintering and reduction annealing processes, a single-phase perovskite structure composed of phases of the A-site high-entropy perovskite thermoelectric ceramic is obtained, equiaxed crystal grains are arranged in the ceramic, and the morphology of the equiaxed crystal grains is matched with that of cubic perovskite structure crystal grains. Elements Ca, Sr, Ba, La, Ti and O in the ceramic are uniformly distributed in the ceramic, and no agglomeration phenomenon exists. The A-bit non-equimolar-ratio high-entropy perovskite thermoelectric ceramic (Ca1 / 3Sr1 / 3Ba1 / 3) 1-xLaxTiO3 obtained by the invention has low thermal conductivity, high conductivity and Seebeck coefficient, further shows a high thermoelectric ZT figure of merit, is simple to operate and short in time period, and provides an effective path for preparing high-temperature thermoelectric materials.

The invention discloses micron-sized spherical gold powder and a preparation method and application thereof, and belongs to the technical field of metal powder.The gold powder is synthesized through a two-step method, firstly, the pH of a gold salt solution is adjusted to 7-9 and 3-5, the gold salt solution is mixed with a dispersing agent solution and a reducing agent solution, and a precursor solution is obtained; and secondly, the precursor solution is mixed with a gold salt solution, the pH is adjusted to 3-5, then the precursor solution is mixed with a dispersing agent solution and a reducing agent solution, micron-sized spherical gold powder is obtained, the gold powder is appropriate in particle size, spherical in surface appearance, uniform in particle size distribution, good in dispersity and free of the agglomeration phenomenon, and when the gold powder is applied to preparation of the conductive paste, the performance of the conductive paste can be effectively improved.

The invention relates to the technical field of flexible electronics, and discloses liquid metal slurry and a preparation method and application thereof. The liquid metal slurry comprises a liquid metal Pickering emulsion; the liquid metal Pickering emulsion comprises liquid metal and a stabilizer; the liquid metal comprises gallium-based liquid metal; the stabilizer comprises cellulose nanocrystals. The liquid metal slurry provided by the invention does not have obvious sedimentation and agglomeration phenomena after standing for 24 hours, is good in stability and has the characteristics of Pickering emulsion, and emulsion microspheres in the liquid metal slurry are micron-sized, uniform in sphere and good in dispersity; the alloy ink obtained by centrifugally purifying the liquid metal slurry can be easily patterned on the substrate, has good adhesiveness with the substrate and low ink mark resistance, and has the potential of being applied to flexible electronics; in the Janus membrane provided by the invention, the compatibility of the liquid metal and the polymer matrix is relatively good, and the Joule thermal performance, the photothermal conversion performance, the softness and the elasticity of the membrane are relatively good.

The invention relates to the technical field of PVB heat-insulating films, in particular to a PVB heat-insulating film based on indium tin oxide and bronze cesium tungsten compounding and a preparation method thereof.The PVB heat-insulating film is prepared from, by weight, 80-120 parts of PVB resin, 20-50 parts of oily plasticizer, 0.1-2.0 parts of silane coupling agent, 0.1-1.0 part of antioxidant, 0.1-1.0 part of ultraviolet light absorber, 1-5 parts of polyethylene glycol derivative and 1-5 parts of compound dispersion slurry, the weight ratio of the indium tin oxide powder to the bronze cesium tungsten powder in the compound dispersed slurry is (5: 5)-(7: 3). According to the PVB heat-insulating film based on indium tin oxide and cesium tungsten bronze compounding and the preparation method, the prepared PVB heat-insulating film has high visible light transmittance and excellent near-infrared light rejection rate, meanwhile, the Faraday cage effect can be effectively avoided, and the signal shielding problem is avoided.

The invention relates to the technical field of alumina modification, and particularly discloses a synthetic method of modified alumina, the synthetic method comprises the following steps: S1, dissolving a surfactant and a rare earth modifier 1 in a sodium metaaluminate aqueous solution to obtain a solution 1; s2, carrying out parallel flow on the solution 1 and an aluminum sulfate aqueous solution to prepare pseudo-boehmite slurry, stirring the pseudo-boehmite slurry, adding an organic solvent, dropwise adding a silane substance, continuously stirring, finally adding lanthanum nitrate, carrying out a reaction, and after the reaction is finished, filtering, washing and drying to obtain modified pseudo-boehmite powder; s3, roasting the modified pseudo-boehmite powder to obtain modified aluminum oxide; the synthesis method is simple in step and short in technological process, and the preparation time can be remarkably shortened while the thermal stability of the aluminum oxide is effectively improved.

The invention discloses a preparation method of monodisperse vaterite-shaped calcium carbonate with uniform particle size, which comprises the following steps: 1, mixing lime with an ethanol solution, carrying out digestion reaction, and standing and settling lime slurry after the digestion reaction is finished; 2, carbon dioxide gas is introduced into the lime slurry for a carbonization reaction, vaterite-shaped calcium carbonate is generated, and different composite crystal growth inhibitors are added during carbonization to regulate and control the crystal form of calcium carbonate; and 3, after the carbonization reaction is finished, carrying out suction filtration, drying and crushing to finally obtain the monodisperse vaterite-shaped calcium carbonate with uniform particle size. The raw materials are low in obtaining cost, the preparation process is simple and easy to adjust, the calcium carbonate particles are regular in morphology and uniform in particle size distribution and are monodisperse products, the method for preparing the calcium carbonate with the special morphology is widened, and the prepared vaterite-shaped calcium carbonate is expected to be applied to the special fields such as the food industry and the pharmaceutical industry.

The invention relates to a preparation method of a magnesium alloy mu-DIC speckle and a characterization method and application thereof. The preparation method comprises the following steps: 1) carrying out electrolytic polishing on a to-be-detected surface of a magnesium alloy sample until the to-be-detected surface is bright and free of scratches; 2) mixing the SiO2 suspension with alcohol according to a certain volume ratio, and performing ultrasonic dispersion to obtain a diluent; 3) placing the polished sample in a diluent for ultrasonic treatment, and then cleaning the sample with alcohol to obtain uniformly dispersed and distributed speckles; the whole preparation of the speckles is a physical process, the sample is not damaged or the properties of the sample are not changed, and the speckles prepared by the method do not interfere with the collection of other signals on the surface of the sample, so that the practicability of EBSD and DIC results is improved; the preparation method has the advantages of being simple, easy to operate, efficient, ultralow in cost and the like, the magnesium alloy material can be applied under the room temperature, high resolution and large view field, and the bottleneck problems that the magnesium alloy sample speckle preparation difficulty is large, and compatibility of the DIC technology and the EBSD technology cannot be achieved at the same time are solved.

The invention belongs to the technical field of powder coatings, and particularly relates to a high-wear-resistance and salt-fog-resistance epoxy powder coating and a preparation method thereof. The epoxy powder coating with high wear resistance and salt spray resistance is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified epoxy resin, 15 to 30 parts of carboxyl-terminated polyester resin, 10 to 25 parts of fluorosilane modified composite filler, 10 to 25 parts of curing agent, 0.5 to 1 part of benzoin, 0 to 20 parts of pigment and 0.3 to 2 parts of other auxiliaries. The invention provides a high-wear-resistance and salt-fog-resistance epoxy powder coating and a preparation method thereof, which are used for solving the technical problems of poor hardness, weather resistance and salt fog resistance of the epoxy powder coating in the prior art.

The invention discloses a multi-element rare earth doped vanadate-based luminescent material and a preparation method thereof, and belongs to the field of rare earth luminescent material preparation. A multi-element rare earth doped vanadate-based luminescent material comprises A, B and C, A, B and C are rare earth elements, A, B and C are different, the chemical formula of the luminescent material is (AxB1-x) 1-yVO4: Cy, x is more than or equal to 0.10 and less than or equal to 1.00, and y is more than or equal to 0.01 and less than or equal to 0.10; the invention can overcome the problems of general luminous intensity, poorer stability and shorter service life of the luminescent material.

The application discloses a mural reinforcing protective agent and a preparation method and application thereof, belongs to the technical field of cultural relic restoration, and can solve the technical problems that existing mural reinforcing materials cannot reinforce the lower layer structure of ancient murals and are prone to being attached to the surface of murals to cause the whitening of the surface pigments. The mural reinforcing protective agent comprises a bacterial cellulose carrier and Ba(OH)2 nanoparticles loaded on the bacterial cellulose carrier in situ. The application plays a reinforcing role on the lower layer structure of murals, realizes deep reinforcement of ancient murals, improves the protection effect, stability and durability, and the surface of the mural will not be whitened.

The invention relates to a preparation method of an iron phthalocyanine (FePc) nanodot modified tubular triazine carbon nitride (TCN) photocatalyst. The catalyst is of a hollow tubular structure, the length of the hollow tube is about 7.4 microns, the diameter of the hollow tube is about 1.6 microns, no obvious porous structure exists on triazine tubular carbon nitride, the thickness is uniform, and the material surface is rough. The preparation method comprises the following steps: synthesizing TCN by using a simple water bath heating and calcining method, grinding a FePc monomer, mixing the ground FePc monomer with the TCN according to a certain proportion, and obtaining the FePc nanodot / TCN composite photocatalyst by using a calcining method. According to the preparation method, the precursor and the product, the environment-friendly composite material is adopted, and pollution to the environment is avoided.

This invention relates to a method for modifying a methane combustion catalyst with Al2O3 and controlling Ce loading. The method comprises: dissolving cerium nitrate hexahydrate in deionized water with the same saturated adsorbed water volume as the pretreated Al2O3 support to obtain a cerium nitrate hexahydrate impregnation solution; uniformly adding the cerium nitrate hexahydrate impregnation solution dropwise onto the pretreated Al2O3 support powder to completely wet it; and then allowing it to stand, dry, and calcining to obtain a CeO2-Al2O3 catalyst support material; dissolving palladium nitrate in deionized water with the same saturated adsorbed water volume as the pretreated Al2O3 support to obtain a palladium nitrate impregnation solution; and adding the palladium nitrate impregnation solution dropwise onto the CeO2-Al2O3 catalyst support material to completely wet it; and then allowing it to stand, dry, and calcining to obtain a Pd-CeO2-Al2O3 catalyst.

This invention discloses a nano-haloysite-based electrolyte filling material and its preparation and application methods. The preparation method includes: mixing and grinding nano-haloysite with graphite; mixing the resulting halloysite-graphite mixture with saturated saline solution and polyacrylamide at low and high speeds, adjusting the pH of the resulting mixture to 6.5–7.5, and then subjecting it to ultrasonic treatment to obtain the electrolyte filling material. The electrolyte filling material obtained by this invention is a stable dispersion system. Compared with kaolinite fillers, its stability is significantly improved, and it does not exhibit stratification over a longer application period. The resulting electrode has a more stable potential difference.

The invention discloses a method for synthesizing a spinel type nano-micro material based on a subcritical technology, and the specific preparation method is as follows: putting a precursor solution, an additive and the like into a high-pressure reaction kettle for mixing, and preparing the spinel type nano-micro material by utilizing the characteristics of high diffusion coefficient, high reaction rate and low surface tension of subcritical water; uniform mixing and efficient reaction among reactants are promoted by a heating device (160-180 DEG C) and different reaction atmospheres (oxygen, helium or nitrogen), and the reaction is kept for 30-180 minutes, so that crystals are rapidly nucleated and nanoparticles are formed. Compared with a traditional spinel type nano-micro material synthesis method, the method has good safety, stability and controllability, and is a subcritical technical method for synthesizing the spinel type nano-micro material with a wide prospect.

The invention belongs to the technical field of crystal materials, and discloses a lutetium yttrium silicate precursor and a preparation method and application thereof. The preparation method of the yttrium lutetium silicate precursor comprises the following steps: preparing a sodium silicate solution; adding lutetium chloride, yttrium chloride and cerium chloride into deionized water to form a mixed solution, then adding the sodium silicate solution, and stirring for 3-8 minutes to obtain a mixed material liquid; mixing the mixed material liquid with a precipitant, carrying out precipitation treatment, stirring for 5-15 minutes, carrying out suction filtration, and washing with deionized water until the pH value is 7-8, so as to obtain a precipitate; and burning the precipitate to obtain the catalyst. The yttrium lutetium silicate precursor produced by the invention is used for crystal growth, the obtained crystal bar is free of miscellaneous agglomerate fog cracking and the like, the uniformity is better, the light output of the crystal is better, and the resolution ratio is better.

The invention discloses a high-temperature superconducting raw material hafnium source and a preparation method and application thereof. The invention uses hafnium n-propoxide, 2,2,6,6-tetramethyl-3,5-heptanedione and tetrahydrofuran as raw materials, and generates tetra(2,2,6,6-tetramethyl-3,5-heptanedione) hafnium source by reacting hafnium ions with heptanedione (tmhd). In the process of synthesizing the hafnium source, "low temperature and slow speed" is adopted to control the adhesion of Hf(tmhd)4 source particles in the synthesis process, so as to obtain hafnium source crystal particles with small particles and narrow particle size distribution. The hafnium source can be used as a superconducting layer raw material with a yttrium source, a barium source and a copper source, and a YBCO film is prepared by MOCVD method, so that Hf ions are pinned in the YBCO film, and a high-temperature superconducting tape with high electrical properties under low temperature and strong magnetic field is obtained, and no agglomeration phenomenon occurs in the hafnium source during film preparation, and the deposition effect and thermal stability are good.

The invention belongs to the technical field of precious metal nano material preparation, and relates to a preparation method of a PtFe alloy nanowire with an intermetallic compound shell, which comprises the following steps: impregnating and loading the PtFe alloy nanowire on a carbon material, and carrying out vacuum heat treatment at 350-400 DEG C to obtain the PtFe alloy nanowire. Compared with the prior art, the method has the advantages that surface atoms of the platinum-based nano-material are subjected to ordered reconstruction under the condition that the original special morphology of the platinum-based nano-material is not damaged in a mild heat treatment mode under the low-temperature condition, and on one hand, a formed intermetallic compound shell facilitates regulation and control of adsorption energy of oxygen-containing groups in the electrocatalytic oxygen reduction process; and on the other hand, the corrosion dissolution of transition metal during the catalytic reaction in an acid system can be effectively inhibited, and the stability of the electrocatalyst is favorably improved. Meanwhile, compared with the prior art, the preparation method has the advantages of being simple, environmentally friendly, free of aftertreatment, suitable for large-scale production and the like.

According to the rapid preparation method, graphene oxide is used as a carbon source and a substrate, metal chloride is used as a raw material, and a Joule heating method is adopted to prepare the carbide ultrahigh-temperature ceramic nanoparticle-graphene composite material. Through short-time rapid high-temperature thermal shock, reduction of graphene oxide and rapid and uniform synthesis of carbide superhigh-temperature ceramic nanoparticles on graphene are synchronously realized. The synthesis process is simple and controllable, the preparation device is simple, the requirement on equipment is low, the industrial production cost can be reduced, and the preparation method is suitable for large-scale preparation of the carbide ceramic-graphene composite material, so that the carbide ceramic-graphene composite material can be more widely applied.

The application discloses a kind of aluminum alloy for selective laser melting forming and preparation method thereof, belong to aluminum alloy material and additive manufacturing technical field.The aluminum alloy of the present application comprises by mass percentage: Mg 3.8~5.2%, Zn 3.8~5.2%, Cu 0.5~1.0%, Ti 0.4~1.6%, C 0.1~0.4%, the balance is Al.Its preparation method includes: using Al-5Ti-1C intermediate alloy and other raw materials are melted into ingot, is atomized by vacuum, then it is printed by selective laser melting, finally it is solid solution and aging treatment.The application is introduced by Al-5Ti-1C intermediate alloy by component control and by submicron level TiC particle cooperates grain refinement, inhibits thermal crack, the yield strength of obtained alloy is greater than or equal to 480MPa, tensile strength is greater than or equal to 550MPa, elongation is greater than or equal to 10%, low in cost, suitable for additive manufacturing.

This invention belongs to the field of ultra-high molecular weight polyethylene (UHMWPE) fiber modification technology, specifically relating to a hydrocarbon-linked boron nitride-modified UHMWPE fiber with high creep resistance and its preparation method. The fiber comprises an UHMWPE matrix and hydrocarbon-linked grafted boron nitride dispersed therein; the hydrocarbon-linked grafted boron nitride is obtained by grafting ω-heptadecenylphosphonic acid onto the surface of hydroxylated nano-hexagonal boron nitride, exhibiting a dual physical crosslinking mechanism. The preparation method includes preparing hydroxylated nano-hexagonal boron nitride, preparing hydrocarbon-linked grafted boron nitride, and preparing high creep-resistant UHMWPE fiber. The method of this invention can significantly improve the creep resistance of the fiber, exhibiting mechanical stability, with a creep rate ≤1.5% after 1000 hours of stress loading at 200 MPa at room temperature. This invention features a simple process, strong adaptability, mild and controllable process parameters, low equipment modification costs, and is easy to industrialize.

The invention relates to color paste for polyurethane foam and a preparation method of the color paste. The color paste for the polyurethane foam is prepared from the following raw materials in parts by weight: 30-40 parts of a modified polyester polyol solution, 0.5-1.5 parts of polyether modified silicone oil, 0.2-0.6 part of a light stabilizer, 0.3-0.8 part of an antioxidant, 3-4 parts of a surfactant, 10-15 parts of polyol and 35-38 parts of toner. According to the technical scheme, the flowing capacity of the color paste is improved by the inventor through the polyether modified silicone oil and the modified polyester polyol solution, so that the color paste is easy to disperse in the use process, and the obtained modified color paste is good in stability, uniform in color paste state, free of agglomeration phenomenon and good in compatibility with materials.

The invention relates to the technical field of medium-entropy alloy additive manufacturing, in particular to an ODS / NiCoCr medium-entropy alloy, a preparation method of the ODS / NiCoCr medium-entropy alloy, an additive manufacturing process and a printed piece. The invention relates to a preparation method of an ODS / NiCoCr medium-entropy alloy. The preparation method comprises the following steps: carrying out resonance acoustic mixing on Y2O3 powder and NiCoCr medium-entropy alloy powder; the Y2O3 powder is added in batches; the resonance sound mixing comprises the following steps: the vibration frequency is 30-85 Hz, the acceleration is 3-100 g, and the vibration time is 80-160 min. According to the preparation method, the NiCoCr medium-entropy alloy powder and the Y2O3 particles are adopted, the ODS / NiCoCr medium-entropy alloy composite powder which is free of Y2O3 agglomeration and uniform in distribution is prepared through resonance sound mixing, the composite powder is spherical or nearly spherical and good in fluidity, and the uniformity and stability of powder laying in the SLM process can be improved.

The present invention belongs to the technical field of yttrium oxyfluoride powder and its preparation, and specifically relates to a yttrium oxyfluoride powder for plasma corrosion-resistant thermal spraying and a preparation method thereof. The preparation method of the yttrium oxyfluoride powder for plasma corrosion-resistant thermal spraying comprises the following steps: precipitation reaction: dripping ammonia water into the yttrium ion solution for reaction, dripping the fluorine source solution while stirring, then adding a dispersant, continuing the reaction, and precipitating; aging at 70-80°C; dehydration and calcination, cooling to obtain powder; grinding the obtained powder, requiring D10: 0.2-0.5μm, D50: 1-1.5μm, D90: 2.5-2.8μm, D100: <3.2μm, adding a granulation shape regulator for spray granulation, and obtaining yttrium oxyfluoride powder for plasma corrosion-resistant thermal spraying. The present invention provides a preparation method of yttrium oxyfluoride powder for plasma corrosion-resistant thermal spraying, and the prepared yttrium oxyfluoride powder is uniformly dispersed and has high purity.

The invention discloses a micron-sized spherical gold powder and a preparation method and application thereof, belonging to the technical field of metal powders. The invention adopts a two-step method to synthesize the gold powder. In the first step, a gold salt solution is adjusted to pH 7-9 and 3-5, and the mixture is mixed with a dispersant solution and a reducing agent solution to obtain a precursor solution. In the second step, the precursor solution is mixed with the gold salt solution, the pH is adjusted to 3-5, and the mixture is mixed with a dispersant solution and a reducing agent solution to obtain the micron-sized spherical gold powder. The gold powder has a suitable particle size, a spherical surface morphology, a uniform particle size distribution, a good dispersion, and no agglomeration. The gold powder is applied to the preparation of a conductive slurry, and the performance of the conductive slurry can be effectively improved.

The invention relates to the technical field of aluminum oxide modification, and specifically discloses a method for synthesizing modified aluminum oxide, which comprises the following steps: S1, dissolving a surfactant and a rare earth modifier 1 in a sodium aluminate aqueous solution to obtain a solution 1; S2, making the solution 1 flow in parallel with an aluminum sulfate aqueous solution to prepare a pseudo-boehmite slurry, stirring the pseudo-boehmite slurry, adding an organic solvent and then dripping a silane substance and continuing to stir, and finally adding lanthanum nitrate to react, filtering, washing, and drying after the reaction to obtain modified pseudo-boehmite powder; S3, calcining the modified pseudo-boehmite powder to obtain modified aluminum oxide; the synthetic method of the invention has simple steps and a short process flow, and can significantly shorten the preparation time while effectively improving the thermal stability of aluminum oxide.

The invention discloses a method for preparing spherical nano barium fluoride, spherical barium fluoride smaller than 5nm is synthesized by a microemulsion reaction method, and the microemulsion is temperature-responsive and does not contain a surfactant. Controllable preparation of the spherical barium fluoride with the ultra-small size smaller than 5 nm under the surfactant-free condition is achieved for the first time. A ternary surfactant-free microemulsion system composed of diethylene glycol monohexyl ether, octane and water is constructed, the amphiphilic solvent characteristic of diethylene glycol monohexyl ether is used for replacing a traditional surfactant, and the dependence of an existing template method on the surfactant is successfully broken through. The particle size of the obtained BaF2 product is only smaller than 5 nm and enters a strong quantum confinement scale range, and the preparation blank of a barium fluoride material in the field of sub-5-nm ultra-small solid spheres is filled.

The invention belongs to the technical field of carbon black production, and particularly relates to a preparation method of high-dispersity acetylene carbon black and granules. The preparation method comprises the following steps: mixing acetylene carbon black serving as a raw material with water to form a mixture; wherein the mass ratio of the water to the raw material acetylene carbon black is (1-3): 10; conducting treatment is conducted on the mixture, and high-dispersity acetylene carbon black is prepared; the dispersity value of the prepared high-dispersity acetylene carbon black is 12.54, the hydroxyl value is 0.26 mgKOH / g, the high-dispersity acetylene carbon black has high dispersity, and when the raw material acetylene carbon black is mixed with water for conducting treatment to prepare the high-dispersity acetylene carbon black, a dispersing agent and an auxiliary agent are not introduced, so that the prepared high-dispersity acetylene carbon black does not contain impurities and has high purity; the resistivity of the high-dispersity acetylene carbon black prepared by the method provided by the invention is 1.96 omega.m, and compared with the resistivity of 3 omega.m of high-quality acetylene carbon black in the market, the high-dispersity acetylene carbon black has high dispersity and relatively high conductivity.

The invention belongs to the technical field of carbon black production, and particularly relates to a preparation method of high-dispersity acetylene carbon black and granules, and the preparation method comprises the following steps: mixing acetylene carbon black serving as a raw material with a CH3COOOH solution to form a mixture; wherein the mass ratio of the CH3COOOH solution to the raw material acetylene carbon black is (4-6): 15; conducting treatment is conducted on the mixture, and high-dispersity acetylene carbon black is prepared; the dispersity value of the prepared high-dispersity acetylene carbon black is 17.4, and when the raw material acetylene carbon black is mixed with a CH3COOOH solution for conducting treatment to prepare the high-dispersity acetylene carbon black, a dispersing agent and an auxiliary agent are not introduced, so that the prepared high-dispersity acetylene carbon black does not contain impurities and is relatively high in purity; the resistivity of the high-dispersity acetylene carbon black prepared by the method provided by the invention is 1.3 omega.m, and compared with the resistivity of 3 omega.m of high-quality acetylene carbon black in the market, the high-dispersity acetylene carbon black has high dispersity and relatively high conductivity.

The invention discloses an inorganic nano antibacterial and mildew-proof spray and a preparation method thereof. The preparation method of the inorganic nano antibacterial and mildew-proof spray adopts a centrifugal disperser, an auxiliary dispersing aid and a related dispersing treatment process, which can make the particle size D90 of the doped ZnO nanoparticles, that is, the particle size at which the cumulative distribution of ZnO nanoparticles is 90%, and the content of particles smaller than this particle size accounts for 90% of all particles below 110nm, and the lowest can reach below 50nm, effectively avoiding the agglomeration of nanoparticles, making the doped nanoparticles have high dispersion efficiency, narrow particle size distribution, and uniform particle distribution. The inorganic nano antibacterial and mildew-proof spray prepared by the preparation method can still have the characteristics of high sterilization efficiency, wide sterilization range, high safety, etc. under insufficient light conditions, and has a non-migrating nanoscale with long-term effectiveness.

The invention discloses a preparation method of an in-situ endogenous multiphase particle reinforced aluminum-based composite material, and belongs to the field of metal-based composite materials. The aluminum-based composite material is characterized in that in-situ generated nano Al2O3 particles and micron (Al, Si, Ti) ternary intermetallic compound particles are uniformly distributed on an aluminum-silicon alloy matrix; the preparation method comprises the following steps: carrying out variable-speed ball milling on raw materials in an argon environment, pressing in a cold / hot isostatic press to obtain a prefabricated blank, sintering the prefabricated blank, and carrying out hot extrusion to obtain the Al2O3 and (Al, Si and Ti) ternary intermetallic compound multiphase reinforced aluminum alloy-based composite material. According to the aluminum-based composite material provided by the invention, nano Al2O3 and micron (Al, Si and Ti) ternary intermetallic compound particles are well combined with a matrix interface, and the strength, modulus and wear resistance of the material are improved through the cooperation of the two micro-nano particles.