1106 results about "Nanocrystal" patented technology

The invention discloses a composite optical film with a polarization function, a preparation method and application thereof. The composite optical film comprises a transparent substrate layer, and a buffer layer, an oriented calcite crystal layer and an anti-reflection layer which are laminated on one side of the transparent substrate layer. Wherein the oriented calcite crystal layer is obtained by coating a superparamagnetic modified calcite crystal composite material suspension on the surface of the buffer layer, inducing optical axis oriented arrangement through a magnetic field and performing UV curing; the buffer layer is obtained by co-extruding a cycloolefin polymer and a polyurethane acrylate mixture, and a thermal expansion coefficient transition system is formed; the anti-reflection layer is composed of nano-porous titanium dioxide with the refractive index changing from 1.8 to 2.3 in a gradient mode, and a refractive index gradient structure is formed. According to the composite optical film, the polarization efficiency and the light transmittance of the composite optical film are improved and the industrial stability is improved through the design of the polarization functional layer in which the calcite nanocrystals are directionally arranged under the induction of a magnetic field and in combination with the gradient refractive index scattering layer.

The invention provides an aerogel reinforced composite electrolyte thin film for a solid-state lithium battery and a preparation method of the aerogel reinforced composite electrolyte thin film, and belongs to the technical field of composite electrolytes.The thin film comprises a three-dimensional porous aerogel skeleton, a solid-state electrolyte compound and lithium salt nanocrystals; wherein the three-dimensional porous aerogel skeleton is prepared from inorganic oxide nanoparticles and a polymer precursor through a sol-gel method; pores of the three-dimensional porous aerogel skeleton are filled with the solid electrolyte compound, the solid electrolyte compound comprises lithium lanthanum zirconium oxide nanowires and a polyoxyethylene-lithium salt composite matrix, and the lithium lanthanum zirconium oxide nanowires are directionally arranged in the thickness direction of the film; the lithium salt nanocrystals grow on the surface of the pore wall of the three-dimensional porous aerogel in situ; the mass ratio of the aerogel skeleton to the solid electrolyte compound is (1: 3)-(1: 15). According to the thin film, the ionic conductivity, the mechanical strength and the interface stability of the electrolyte are remarkably improved.

The invention belongs to the technical field of coatings, and discloses an anti-sinking water-based acrylic resin coating and a preparation method thereof.The anti-sinking water-based acrylic resin coating is prepared from, by weight, 110-130 parts of modified water-based acrylic resin, 10-25 parts of modified cellulose nanocrystals, 3-5 parts of a composite additive, 4-6 parts of a dispersing agent, 0.5-2 parts of a defoaming agent, 0.5-2 parts of a flatting agent and 10-20 parts of water; the acrylic resin is modified by using the organic silicon oligomer and the epoxy resin, the film hardness is high, the adhesive force is strong, and the film hardness, the impact resistance, the ultraviolet aging resistance and the flame retardant property of the material are improved by adding the modified cellulose nanocrystals and the composite additive.

The invention relates to the technical field of magnetic material preparation and heat treatment, in particular to a heat treatment process window widening method for a high-magnetic-conductivity nanocrystalline strip, which comprises the following steps of: by gradient component design and pulsed magnetic field coupling heat treatment, enabling the initial magnetic conductivity of the strip to exceed 22,000 and widening the heat treatment temperature interval to 400-600 DEG C; the alloy comprises 73.5% of Fe, 1% of Cu, 3% of Nb, 13.5% of Si, 8.5% of B and 0.5% of Co, during heat treatment, the temperature is increased to 450 DEG C at the speed of 15 DEG C / min, a 0.8 T pulsed magnetic field is applied for heat preservation, then the temperature is increased to 550 DEG C for heat preservation, alpha-Fe (Si) nanocrystalline and Co-B amorphous interface phases are generated through crystallization, and Co is distributed in a solid solution mode. The method widens the heat treatment temperature interval, improves the initial magnetic conductivity of the strip, improves the toughness, meets automatic production, and reduces the cost by using the existing equipment; and the prepared strip is high in magnetic conductivity, good in stability, suitable for various scenes and good in economic benefit and social benefit.

A high-strength, highly transparent nanocrystalline glass, a preparation method therefor, and a use thereof. The high-strength, highly transparent nanocrystalline glass uses precursor minerals mainly comprising synthetic aluminum-rich feldspar-like ceramic glass material, β-spodumene material, cordierite material, synthetic β-dicalcium silicate material, and magnesium aluminum spinel material for the main body of a feldspar-like matrix glass having a stable structure. Ultrafine zirconia powder having a particle size of less than 10 nm is used as a nucleating agent and microcrack damping and pinning agent, to control the formation of nanocrystals smaller than 100 nm in the glass body formed after melting. The volume percentage content of the nanocrystals is 50%-95%, and the nanocrystals together with the matrix glass form a high-strength, highly transparent nanocrystalline glass having a uniform microstructure. The obtained nanocrystalline glass has high hardness, high fracture toughness and high light transmittance, and is suitable for manufacturing various types of optical glass.

The invention provides a cerium oxide photo-thermal synergistic catalytic material loaded with a metal promoter as well as a preparation method and application of the cerium oxide photo-thermal synergistic catalytic material. The cerium oxide photo-thermal synergistic catalytic material loaded with the metal promoter comprises a cerium oxide nanocrystal and the metal promoter loaded on the surface of the cerium oxide nanocrystal, the exposed crystal face of the cerium oxide nanocrystal comprises a {111} crystal face, and the area of the {111} crystal face accounts for more than 50% of the total area of the outer surface of the crystal face; the mass fraction of the metal cocatalyst is 0.1-2wt% of the mass of the cerium oxide. The catalytic material provided by the invention takes cerium oxide with a {111} crystal face as an exposed special crystal face as a carrier, photons can be captured and charges can be separated more efficiently, and phonons further promote deep trap state charge release. Meanwhile, the metal additive is added and cooperates with cerium oxide with exposed special crystal faces for catalysis, so that the catalytic effect is remarkably improved, and efficient catalytic combustion of methane is achieved under the mild condition.

The invention relates to a low-loss multiphase inductance material which comprises a magnet and a winding, coils adjacent to the winding are wound in the reverse direction, meanwhile, the magnet extends out to form electrodes, and the magnet comprises Fe-based nanocrystalline and iron powder. The invention has the effect of reducing the loss of the inductance material.

The diamond coated glass structure may include a glass substrate in which the deposited nanocrystal diamond is coated on the glass substrate. A layer of ultra-nanocrystalline diamond may be deposited on the deposited nanocrystalline diamond. The combination of the deposited nanocrystal diamond and ultra-nanocrystal diamond may have a surface roughness of less than 9 nanometers RMS.

The invention discloses a corrosion-resistant protective sleeve for an aluminum alloy cable and a preparation method of the corrosion-resistant protective sleeve, and belongs to the field of cable protective sleeves. The corrosion-resistant protective sleeve for the aluminum alloy cable is prepared from the following raw materials in parts by mass: 40 to 50 parts of ethylene propylene diene monomer, 15 to 25 parts of fluorinated silicone rubber, 5 to 10 parts of modified thiolated ethylene-vinyl alcohol copolymer, 8 to 15 parts of metal fluoride nanocrystal, 4 to 8 parts of vulcanizing agent, 3 to 8 parts of plasticizer and 3 to 5 parts of flame retardant. The two rubber matrixes are compounded to form a physical barrier layer to prevent corrosion media and water molecules from permeating, material pores can be filled with the metal fluoride nanocrystals, diffusion channels of the corrosion media are reduced, and hydrophobicity and corrosion resistance are improved through cooperation of the metal fluoride nanocrystals and the fluorinated silicone rubber. The modified thiolated ethylene-vinyl alcohol copolymer can improve the compatibility between rubber matrixes and form coordination with metal ions of the metal fluoride nanocrystals, so that the diffusion path of a corrosive medium is prolonged, and the corrosion of the corrosive medium is synergistically blocked.

Optical device films and methods of forming optical device films having a RMS surface roughness less than about 2.2 μin and a refractive index greater than 2.0 are provided. In one embodiment, an optical device film is provided and includes a crystalline or nano-crystalline material having a refractive index greater than 2.0. A top surface of the optical device film has a root-mean-square (RMS) surface roughness less than about 2.2 microinches (μin).

The invention discloses a preparation method of a high-strength, high-hardness and ablation-resistant CuWTaTeAl gradient nano composite material. The method comprises the following steps: 1, mechanically mixing Cu80Al20 spherical coated powder, Cu90W10 spherical coated powder, WTe2 alloy powder, Ta powder and Cu powder, and then carrying out ball milling and mixing; 2, performing SPS (spark plasma sintering); thirdly, after soaking treatment, multi-pass hot rolling deformation is carried out, and then quenching treatment is carried out; and 4, annealing heat treatment. The binary spherical coating powder, the alloy powder and the elementary substance powder are subjected to ball milling and mixing to achieve uniform distribution of all elements, high-melting-point W and Ta are added to improve the ablation-resistant temperature of the composite material, large-scale copper dendrite powder is added to form gradient distribution nanocrystals, the proportion of all the elements is controlled, the lattice distortion degree is increased, and the ablation-resistant temperature of the composite material is improved. The high-strength, high-hardness and ablation-resistant CuWTaTeAl gradient nano composite material is suitable for the fields of contacts, switches, electrical connectors, resistance welding electrodes and the like.

The invention provides a coil module and electronic equipment. Relates to the technical field of circuit boards. A high-speed signal line and a wireless charging coil are integrated in the same coil module. The coil module can comprise a substrate and a metal layer formed on one side of the substrate, the metal layer comprises a thick metal area, a thin metal area and a transition area located in a junction area of the thick metal area and the thin metal area, a wireless charging coil is arranged in the thick metal area, and a high-speed signal line is arranged in the thin metal area. The first nanocrystal and the second nanocrystal are oppositely arranged on the two sides of the substrate, at least part of the periphery of the wireless charging coil is covered with the first nanocrystal, the first nanocrystal extends to the position above the transition area, and at least part of the wireless charging coil is covered with the second nanocrystal. The integration level can be improved, space resources are saved, and the high-speed signal line and the wireless charging coil are pulled away through the transition area without affecting the signal quality of the high-speed signal line and the wireless charging coil.

The present invention discloses an air filtration membrane based on nanohybrid-modified polylactic acid fiber and a preparation method thereof. The present invention adopts a microwave-assisted in-situ synthesis method to directly induce the in-situ growth of ZIF-8 nanocrystals on the surface of CNTs to obtain CNT@ZIF-8 nanohybrids. Through coaxial electrospinning technology, an air filtration membrane with CNT@ZIF-8 uniformly embedded in polylactic acid fibers is obtained. The preparation method of the present invention is simple and the conditions are controllable. The prepared air filtration fiber membrane has the advantages of high surface potential, large specific surface area, good air permeability, long-term filtration, etc., and is an air filtration material with broad application prospects.

The invention discloses an environment-friendly flame-retardant polyvinyl alcohol film and a preparation method thereof, and relates to the technical field of polyvinyl alcohol films. The polyvinyl alcohol film is prepared from the following components in parts by weight: 90 to 110 parts of polyvinyl alcohol, 0.4 to 1.2 parts of polydopamine modified cellulose nanocrystals, 8 to 15 parts of chitosan / phytic acid / boron nitride composite flame retardant and 0.6 to 0.9 part of plasticizer. The preparation method comprises the following steps: adding polyvinyl alcohol into deionized water, dissolving and mixing to obtain a polyvinyl alcohol aqueous solution, adding glycerol, continuously stirring for 1-2 hours, sequentially adding a chitosan / phytic acid / boron nitride composite flame retardant and polydopamine modified cellulose nanocrystals, and uniformly stirring and mixing at 50-70 DEG C to obtain a blended solution; and carrying out film casting on the blended solution. The limit oxygen index of the film is greater than or equal to 30%, the vertical combustion grade is V-0, the tensile strength is greater than or equal to 40%, the elongation at break is greater than or equal to 140%, and the light transmittance is greater than or equal to 85%.

The invention relates to a UCNPs probe-based in-situ dynamic monitoring molecular interaction method, which comprises: S1, providing a UCNPs probe, the core layer of the UCNPs probe being a rare earth up-conversion nanocrystal, the shell layer of the UCNPs probe being an anti-quenching inert material, and the anti-quenching inert material coating the surface of the rare earth up-conversion nanocrystal; the surface of the anti-quenching inert material is modified with ligand molecules, and the ligand molecules are used for being specifically combined with target molecules in a to-be-detected sample; s2, mixing or contacting the UCNPs probe with a to-be-detected sample containing target molecules to construct a to-be-analyzed molecular interaction system; s3, irradiating the molecular interaction system by adopting near-infrared pulse laser, and collecting the change of the fluorescence lifetime tau of the UCNPs along with the time t and the change of the fluorescence intensity I along with the time t in real time to obtain a tau-t curve and an I-t curve; and S4, according to the tau-t curve and the I-t curve, realizing in-situ dynamic monitoring on the molecular interaction state. According to the method, a molecular binding / dissociation event is directly converted into a quantifiable and anti-interference optical signal, and the technical defect that in-situ dynamic monitoring of molecular interaction cannot be achieved in a traditional technology is overcome.

The invention relates to the field of pharmacy, and discloses a felodipine sustained release tablet and a preparation method thereof.The felodipine sustained release tablet comprises a tablet core and a film coating layer wrapped outside the tablet core, and the tablet core comprises the following components in parts by mass: 3.5-5.0 parts of felodipine nanocrystals; 50 to 65 parts of modified hydroxypropyl methylcellulose; the preparation method comprises the following steps: S1, preparing felodipine nanocrystals: dissolving felodipine in an organic solvent, and carrying out anti-solvent precipitation and high-pressure homogenization treatment, so as to obtain a nanocrystal suspension; drug nanocrystals are embedded between silicate layers through an ultrasonic embedding technology, and burst release is inhibited by combining physical confinement and electrostatic adsorption; the gradient pore skeleton constructs a pore layer-by-layer decreasing structure through fluidized bed multi-temperature zone deposition, the release rate is accurately regulated and controlled, and collapse is avoided; the ionic liquid stabilizer is introduced, and the problems of nanocrystal aggregation and degradation are synchronously solved through hydrogen bond anchoring and an antioxidant function.

The invention discloses a high-strength anti-freezing vegetable protein adhesive based on multi-scale structure regulation and a preparation method thereof. The vegetable protein adhesive is mainly prepared from the following raw materials: vegetable protein meal, an anti-freezing modifier, modified cellulose nanocrystals, a chemical cross-linking agent and a dispersion medium. Wherein the components comprise 30 parts of vegetable protein meal, 10-15 parts of an anti-freezing modifier, 0.5-1.2 parts of modified cellulose nanocrystals, 4-6 parts of a chemical cross-linking agent and 70 parts of a dispersion medium. The invention provides a high-strength anti-freezing vegetable protein adhesive based on multi-scale structure regulation and control, which breaks through the bottleneck of low-temperature freezing and brittleness of the traditional adhesive, effectively solves the problem of poor performance of the vegetable protein adhesive in a low-temperature environment, fills up the blank of a bio-based adhesive in the low-temperature field, and has a wide application prospect. The anti-freezing performance, the bonding strength, the environment-friendly performance and the sustainability are excellent.

The invention discloses a solid waste-based low-carbon gel material and a preparation method thereof. The material comprises the following components in percentage by mass: 40%-60% of high-activity slag, 20%-35% of tower bottom ash subjected to stage treatment, 3%-8% of a pH sensitive composite exciting agent, 0.5%-2% of nano C-S-H seed crystal, 0.1%-1% of modified cellulose nanocrystals and 15%-25% of water, and the water-solid ratio is controlled to be 0.15-0.28. The preparation method comprises the steps of tower bottom ash grading pretreatment, nano C-S-H seed crystal preparation and dispersion, pH sensitive composite exciting agent preparation, mixing and slurry preparation. Sulfate release is optimized through staged treatment, alkalinity is dynamically regulated and controlled through a pH sensitive exciting agent, ordered hydration and a multi-stage pore structure are induced through nano C-S-H seed crystals and modified cellulose nanocrystals, and the compressive strength, the impermeability and the low expansion rate are remarkably improved. Industrial solid waste is effectively utilized, energy consumption and carbon emission are reduced, the problems of non-uniform hydration and expansion cracking are solved, and the method is suitable for the fields of green buildings and resource recycling.

The invention discloses a forming method of a flash memory unit. The forming method comprises the following steps: providing a semiconductor substrate; forming a tunneling oxide layer on the semiconductor substrate; forming nanocrystalline silicon particles on the tunneling oxide layer; forming an isolation insulating layer on the tunneling oxide layer and the nanocrystalline silicon particles; and forming a control grid on the isolation insulating layer, wherein the step of forming the nanocrystalline silicon particles on the tunneling oxide layer comprises: forming an amorphous silicon layer on the tunneling oxide layer; and performing repeated seed crystal particle forming processes on the amorphous silicon layer, wherein surface annealing treatment is performed between two adjacent seed crystal particle forming processes, and an annealing process is performed after the last seed crystal particle forming process. The flash memory unit can be used for storing a large quantity of electrons, and has high performance.

A razor blade is proposed. The razor blade may include a blade substrate having a blade edge formed therein, and a coating layer formed on the blade substrate. The coating layer may contain a matrix-forming atom, a first atom, and a second atom. The coating layer may contain a first coating region and a second coating region located at different depths in the thickness direction. The second coating region may have a larger number of nanocrystal regions than the first coating region.

The invention discloses a wave-absorbing material chemical coprecipitation reaction kettle, and relates to the technical field of chemical engineering equipment and functional material preparation, the reaction kettle comprises the following components: a three-stage gradient reaction cavity structure, an anti-pollution structure and a multi-physics field coupling control platform; through the design of a three-stage gradient reaction cavity structure, optimal distribution of a fluid field is realized, stable and efficient flowing of a reaction solution among different cavities is ensured, a multi-axis intelligent mixing system in a premixing area can quickly mix a precursor solution to achieve a molecular-level mixing state, an ideal initial condition is provided for subsequent reaction, and the reaction efficiency is improved. The nucleation area realizes uniform nucleation of nanocrystal nuclei through accurate temperature control and chemical environment control, the grain size distribution range is effectively reduced, the growth area controls preferred growth of crystal faces through adjustment of magnetic field intensity and solution supersaturation degree, particles with good monodispersity are obtained, and under the combined action of the designs, the particle size distribution range is effectively reduced. The reaction efficiency and the consistency of the product quality are obviously improved.

A non-volatile memory device is provided. The non-volatile memory device may include a substrate, a gate electrode and a gate insulating layer that are alternately stacked on the substrate in a direction perpendicular to a top surface of the substrate, a channel hole that vertically penetrates the gate electrode and the gate insulating layer in the direction, a charge trap layer inside the channel hole and a channel layer in the charge trap layer, and the charge trap layer includes a nanocrystal region and an isolation region that are alternately arranged in the vertical direction.

The invention belongs to the technical field of anti-counterfeiting optical materials and application thereof, and particularly relates to a double-ligand modified and water stimulus responsive perovskite fiber membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly dissolving metal halide salt BX2 and AX powder in a polar solvent to form a perovskite ABX3 precursor solution, then adding a cyclodextrin cyclic supramolecule and long-chain fatty amine double-ligand system into the obtained precursor solution, and then fully mixing the obtained mixed solution with a high-molecular polymer solution to prepare a spinning solution suitable for electrostatic spinning. And finally, preparing the large-area reversible intelligent fluorescent fiber membrane with the water stimulus response through an electrostatic spinning technology. The water stimulus response intelligent fluorescent fiber membrane based on the perovskite nanocrystals can be applied to the anti-counterfeiting field, such as single information encryption, dual information encryption, anti-counterfeiting labels and high-resolution anti-counterfeiting, is especially suitable for anti-counterfeiting in an underwater environment, and has a wide application prospect.

The invention provides sunlight-driven rapid self-repairing high-toughness polyurethane as well as a preparation method and application thereof, and relates to the technical field of ecological polymer materials. According to the sunlight-driven rapid self-repairing high-toughness polyurethane provided by the invention, diisocyanate, a chain extender, an organic solvent, a catalyst, dimethylglyoxime and heterojunction nanocrystals are taken as preparation raw materials, wherein the heterojunction nanocrystals comprise one or more of TiO2-CuS, CuO-CuS, TiO2-CuO and ZnS-CuS. Specific heterojunction nanocrystals are selected, the light absorption range of self-repairing polyurethane is widened, the light absorption efficiency is enhanced, excellent antibacterial performance is given, and efficient self-repairing of damage under driving of natural light such as sunlight is achieved in combination with a specific dynamic structure of self-repairing polyurethane. Meanwhile, the heterojunction nanocrystals and oxime bonds generate a coordination effect, so that the polyurethane material has the mechanical properties of high strength, high toughness and the like.

The invention provides a method for obtaining a small-size perovskite luminous body through post-treatment, which comprises the following steps of: blending perovskite nanocrystals prepared by a calcination method with neutral soluble salt, and performing dry ball milling to obtain the small-size perovskite luminous body, the perovskite nanocrystalline is of a CsPbX3 perovskite structure, and X is at least one or two of I, Br and C1. Aiming at the perovskite illuminant prepared by a high-temperature calcination method, a specific ball milling auxiliary agent is added in a ball milling post-treatment process, so that the size of the perovskite illuminant is greatly reduced, and the luminescence property can be improved.

The invention discloses a Cu2O (at) Ag / g-C3N4 nano composite material, which is characterized in that silver nanocrystals are uniformly distributed and coated on the surface of the Cu2O nanocrystals to form Cu2O (at) Ag nanocrystals, and the Cu2O (at) Ag nanocrystals are uniformly loaded on the surface of a g-C3N4 nanosheet. The invention also discloses a preparation method of the Cu2O-coated Ag / g-C3N4 nano composite material, which comprises the following steps: uniformly mixing a copper source, a silver source, a g-C3N4 nanosheet and a solvent, adding an alkaline substance, carrying out primary reaction, then adding a reducing agent, carrying out secondary reaction, and carrying out solid-liquid separation to obtain the Cu2O-coated Ag / g-C3N4 nano composite material. The invention also discloses an application of the Cu2O / Ag / g-C3N4 nano composite material as an SERS (Surface Enhanced Raman Scattering) substrate and a photocatalytic degradation agent. Meanwhile, the photocatalytic degradation performance is good, and the SERS detection sensitivity is high.

The invention provides an inorganic fiber prepared from industrial solid waste and a preparation method thereof, and belongs to the technical field of inorganic fiber preparation. According to the rare earth doped low-temperature co-melt, a silicon-oxygen network is destroyed and stabilized, the viscosity of solid waste melt is reduced, phase splitting is inhibited, and a uniform melt environment is created; the viscosity of the carbon-coated composite nanoparticles is reduced through in-situ carbon thermal reduction reaction in a synergistic manner, and meanwhile, a reactant gas is utilized to clarify a melt, so that internal defects are removed; the apatite surface modified core-shell nanocrystal is used as a microstructure construction core, a fine and uniform microcrystalline phase is formed in the fiber through induction, and a high-strength basis of the material is constructed; homogenization of the low-temperature co-melt is the premise of subsequent uniform dispersion of additives, core-shell nanocrystals construct a high-strength microcrystalline matrix, carbon-coated particle cores are positioned at a phase interface, the fibers are endowed with high toughness through a physical mechanism, and comprehensive mechanical properties are improved through cooperation of the core-shell nanocrystals, the carbon-coated particle cores and the core-shell nanocrystals.

The invention provides a nanocrystalline composite oral ulcer film agent as well as a preparation method and application thereof. The nanocrystalline composite oral ulcer film agent comprises a waterproof backing layer and a drug-loading adhesion layer coated on the waterproof backing layer, the drug-loaded adhesion layer comprises a macromolecular hydrogen bond compound formed by a weakly acidic polymer and a nonionic proton receptor polymer, and a nanocrystalline drug. Compared with the prior art, the preparation method has the advantages that the polyacrylic acid polymer and the nonionic cellulose polymer interact to form IPC serving as an adhesion layer film-forming material, the nanocrystals are loaded into the adhesion layer film-forming material, the waterproof backing layer is coated with the adhesion layer film-forming material, and the oral ulcer film agent is prepared after drying and cutting. The obtained film agent has good comfort and adhesive power, shows good drug stability and permeation promotion performance, can be used as a carrier of an oral administration route, prolongs the drug action time and improves the curative effect. The preparation method of the film agent is simple and easy for industrial mass production.

The invention provides a magnetic resin composition, a magnetic film and application thereof. The magnetic resin composition comprises (A) a magnetic filler, (B) epoxy resin, (C) a curing agent and (D) a flexibilizer, the magnetic filler (A) comprises carbonyl iron powder (A1), FeSiCr alloy (A2) and iron-based nanocrystals (A3); based on the total mass of the magnetic resin composition as 100%, the content of the (A) magnetic filler is 85% or more; based on 100% of the total mass of the magnetic filler (A), the content of the carbonyl iron powder (A1) is 55%-65%, the content of the FeSiCr alloy (A2) is 15%-25%, and the content of the iron-based nanocrystalline (A3) is 15%-25%. According to the magnetic resin composition and the preparation method thereof, specific types of magnetic fillers are introduced and compounded according to a specific content, so that the magnetic resin composition has relatively high magnetic conductivity and relatively low magnetic loss after being cured, and meanwhile, the binding force with a copper layer is relatively high.