551 results about "Magnetic alloy" patented technology

The invention discloses an iron-cobalt-based amorphous nanocrystalline soft magnetic alloy and a preparation method thereof, and relates to the technical field of nanocrystalline alloys.The iron-cobalt-based amorphous nanocrystalline soft magnetic alloy comprises an amorphous matrix and nanocrystalline distributed on the amorphous matrix in a dispersed mode, the chemical expression of the iron-cobalt-based amorphous nanocrystalline soft magnetic alloy is FexCoySiaBbPcCdCue, x, y, a, b, c, d and e in the formula respectively represent the atom percentage content of all corresponding components, wherein 6 < = c < = 10, 0 < = e < = 1, and x + y + a + b + c + d + e = 100. The preparation method comprises the following steps: mixing the raw materials according to the atomic percentage, smelting, preparing a molten master alloy ingot into an amorphous alloy strip by adopting a single-roller quenching method, cutting, wrapping with tinfoil, and carrying out annealing heat treatment in an annealing furnace. According to the iron-cobalt-based amorphous nanocrystalline magnetically soft alloy, a wide heat treatment process window can be obtained through component regulation and control, the iron-cobalt-based amorphous nanocrystalline magnetically soft alloy can be suitable for industrial production, and the iron-cobalt-based amorphous nanocrystalline magnetically soft alloy has good soft magnetic performance and can become a new material in the high-frequency working field.

The invention relates to a composite electromagnetic shielding structure for a power terminal and a preparation method thereof, the structure comprises an accommodating shell, the accommodating shell is formed by connecting a plurality of composite electromagnetic shielding plates, and each composite electromagnetic shielding plate comprises an inner surface shielding layer and an outer surface shielding layer which are attached to each other; a heat conduction layer is arranged between the inner surface shielding layer and the outer surface shielding layer, and the inner surface shielding layer is located in the accommodating shell; a protective layer is arranged on the outer layer of the outer surface shielding layer and comprises an insulating layer and a waterproof layer, and the waterproof layer is located on the outer layer of the insulating layer; the outer surface shielding layer is made of a low-frequency electromagnetic field shielding material formed by mixing amorphous magnetic alloy powder, magnetic fibers and nickel powder; and the inner surface shielding layer is made of a high-frequency electromagnetic shielding material formed by mixing silicon carbide and resin foam rubber fibers. The structure can cope with various electromagnetic interference environments, provides electromagnetic shielding protection, and also has better electromagnetic shielding effectiveness for electromagnetic interference of different frequency bands.

The invention belongs to the technical field of magnetic functional materials, and particularly relates to a nanocrystalline magnetically soft alloy and a preparation method and application thereof. The invention provides a nanocrystalline soft magnetic alloy which comprises the following chemical components: Fe, Si, B, Nb, Cu, P and rare earth metal, and the rare earth metal is selected from at least one of Nd and Sm. According to the nanocrystalline magnetically soft alloy, a proper amount of rare earth metal is added, the ferromagnetic coupling exchange effect between ordered phases of the nanocrystalline magnetically soft alloy is improved, so that the magnetic induction intensity and the high-frequency magnetic conductivity of the nanocrystalline magnetically soft alloy are both improved, the magnetic conductivity of the nanocrystalline magnetically soft alloy at 100 kHz can reach 42000 or above, and the high-frequency magnetic conductivity of the nanocrystalline magnetically soft alloy at 100 kHz can reach 42000 or above. Meanwhile, the saturation flux density reaches up to 1.75 T or above, and the coercive force is as low as 0.8 A / m.

Disclosed are an iron-based nanocrystalline soft magnetic alloy powder, a soft magnetic composite material, and a preparation method therefor. The atomic percentage molecular formula of the iron-based nanocrystalline soft magnetic alloy powder is: FeaBbCcSidCueMmQqZzXx, M being at least one of Co and Ni, Q being at least one of a pre-transition element, a semi-metal element, a rare earth element and Al, Z being at least one of Au, Ag and a platinum group metal element, X being at least one of O, N, S and a halogen element, 70≤a+m≤75, 8≤b≤18, 0≤c≤5, 10≤d≤15, 0≤m≤10, 1.3≤e≤2.5, 0≤q≤2, 0≤z≤1, 0≤x≤0.2, 22≤b+c+d≤30, and a+b+c+d+e+m+q+z+x=100. The soft magnetic composite material is composed of the described iron-based nanocrystalline soft magnetic alloy powder, an alloy-state soft magnetic powder, a binder and the like. The provided iron-based nanocrystalline soft magnetic alloy powder and soft magnetic composite material exhibit excellent soft magnetic performance, good processability and low cost.

The invention relates to flower-like FeCoNiMnPt high-entropy magnetic alloy powder and a preparation method of the flower-like FeCoNiMnPt high-entropy magnetic alloy powder. According to the technical scheme, the preparation method comprises the following steps: respectively dissolving ferric acetylacetonate, cobalt acetylacetonate, nickel acetylacetonate, manganese acetylacetonate and platinum acetylacetonate in oleylamine at equal concentration, and carrying out ultrasonic dispersion to obtain a solution A; respectively dissolving octadecyl trimethyl ammonium bromide and glucose in the solution A at equal concentration, carrying out ultrasonic dispersion, adding the obtained solution B into a sealed container, putting the sealed container into a high-pressure reaction kettle, putting the high-pressure reaction kettle into a hydrothermal oven, carrying out heat preservation and cooling, and taking out the sealed container; the obtained solution C is subjected to centrifugal treatment, washing, drying and cooling, and magnetic alloy powder is obtained; and placing the crucible filled with the magnetic alloy powder in a tubular atmosphere furnace, preserving heat at 450-650 DEG C, and cooling to obtain the flower-like FeCoNiMnPt high-entropy magnetic alloy powder. The preparation method is simple in process, low in cost and high in production efficiency, and the prepared product is large in specific surface area and high in saturation magnetization.

The invention discloses a magnetic adjustment water lubricated bearing and a bearing support control method, which are applied to a large ship propulsion shaft system, and comprise a bearing shell, an electromagnetic excitation module, a batten, a sensor module, a power supply driving module and a control system, a plurality of mounting grooves are formed in the bearing shell; an electromagnetic excitation module is arranged in each mounting groove and generates a variable magnetic field with set intensity; a plurality of magnetically soft alloy segments are arranged on the batten, the magnetically soft alloy segments correspond to the electromagnetic excitation modules one to one, and a magnetic field acts on the magnetically soft alloy segments to generate electromagnetic attraction force; the control system independently controls the excitation current of each electromagnetic excitation module according to data of the sensor module, and generates magnetic fields with different intensities to act on soft magnetic alloy areas at corresponding positions, so that precise control of local supporting rigidity and lubricating gaps of the water-lubricated bearing is realized, unbalance loading and abnormal wear risks are effectively reduced, and the service life of the water-lubricated bearing is prolonged. And the adaptive capacity of the bearing under low-speed heavy load and dynamic disturbance is improved.

The invention discloses an iron-based nanocrystalline soft magnetic alloy and a preparation method thereof. A magnetically soft alloy strip is prepared through smelting and a single-roller melt-spinning method, stress relief annealing is carried out on the magnetically soft alloy strip through assistance of a magnetic field, and then crystallization annealing treatment is carried out. Different from a traditional method for regulating and controlling the magnetic performance of the alloy through precipitation of a large number of nanocrystals, the method only induces precipitation of a very small number of nanocrystals, and high saturation flux density and low coercive force can be obtained while the toughness of the strip is ensured; the iron-based nanocrystalline soft magnetic alloy with high saturation flux density and low coercive force can be prepared by taking Fe as a main element, Co element with the atomic fraction lower than 8%, Cu element with the atomic fraction lower than 1% and at least one of oxygen, sulfur, phosphorus, carbon, silicon, boron and the like as other trace elements.

The invention relates to the field of metal soft magnetic materials, in particular to a high-frequency high-permeability metal soft magnetic powder core and a preparation method thereof. The preparation method comprises the following steps: S1, screening magnetically soft alloy powder with a preset particle size; s2, preparing passivation powder; s3, preparing granulation powder; s4, a blank is prepared through compression molding; s5, the blank piece is subjected to curing treatment; and S6, the cured part is subjected to high-temperature heat treatment in vacuum, and the high-frequency and high-permeability metal soft magnetic powder core is obtained. The preparation method disclosed by the invention is simple, mild in reaction condition, low in cost and capable of realizing automatic large-scale production. The high-frequency and high-permeability metal soft magnetic powder core prepared by the invention has high frequency, high magnetic induction intensity and high unit power density, particularly, the internal stress of a metal soft magnetic material is released to the greatest extent by adopting high-temperature heat treatment, the coercive force is reduced, the density and the permeability are remarkably improved, and the high-frequency and high-permeability metal soft magnetic powder core is widely applied to DC-DC and power supply circuits with ultrahigh switching frequency and high magnetic conductivity. And a MHz-level power supply circuit.

The invention provides an iron-based magnetically soft alloy strip and a preparation method and application thereof, the alloy composition of the iron-based magnetically soft alloy strip is FeaCobCrcSidBeWfAlgGehRei (MxNy) j, 75 < = a < = 81, 5 < = b < = 11.9, 5 < = c < = 10, 2 < = d < = 4, 2 < = e < = 4, 2 < = f < = 4, 1 < = g < = 3, 0.5 < = h < = 2, 0.5 < = i < = 1.5, 0.1 < = j < = 1, x: y = 1, and a + b + c + d + e + f + g + h + i + j = 100; m is Ti and / or Zr, and N is nitrogen; wherein the nitride material has an iron-based grain phase and a germanium-tungsten-containing precipitated phase, the nitride is distributed between the interfaces of the iron-based grain phase, and the average grain size of the iron-based grain phase is 5-20 nm. The iron-based magnetically soft alloy strip can be suitable for complex application scenes, and the magnetic performance and reliability of the iron-based magnetically soft alloy are improved.

The invention relates to a sunken porous magnetic alloy ball wave-absorbing material and a preparation method and application thereof.The wave-absorbing material is prepared through the following steps that S1, citric acid, soluble ferric salt, soluble cobalt salt and soluble nickel salt are dissolved in a mixed solvent of ethylene glycol and water, and the mixture is fully stirred to form a uniform mixed solution; and S2, the mixed solution obtained in the step S1 is subjected to spray drying, obtained precursor powder is placed in the air atmosphere to be calcined to remove the carbon source, then the precursor powder is placed in the H2 / Ar atmosphere to be subjected to heating reduction, and the porous FeCoNi alloy balls with the surface pits are obtained and are the target product. The surface of the prepared alloy microsphere has an obvious concave structure, magnetic anisotropy and magnetic performance are enhanced, a small number of pores are generated in the reduction process, impedance matching of the material is optimized, and effective high-frequency electromagnetic absorption is achieved; and due to the synergistic effect of the recesses and the pores, the obtained alloy microspheres have obvious lightweight characteristic, and have good application prospects in the field of electromagnetic absorption.

The present invention relates to a synchrotron fast-response magnetic alloy high-frequency system, comprising: a control circuit for generating a waveform signal; a full-solid-state power source for receiving the waveform signal and performing power synthesis to generate a power signal; an impedance phase compensator for realizing impedance rise and fall and phase compensation; an impedance transformer for realizing impedance transformation to achieve impedance matching between the full-solid-state power source and the magnetic alloy-loaded resonant cavity; a magnetic alloy-loaded resonant cavity for receiving the power signal and generating a radio frequency signal to operate on the heavy ion beam; and a sampling circuit for sampling the radio frequency signal and feeding it back to the control circuit. The synchrotron fast-response magnetic alloy high-frequency system provided by the technical solution of the present invention has performance indicators of low frequency, high bandwidth, fast rising of voltage signal and response, and can output single-sine and half-sine waveforms, realizing the functions of capturing, accelerating and Barrier Bucket bunch accumulation for various heavy ion beams.

The present invention relates to a method for producing a soft magnetic alloy powder, a soft magnetic alloy powder, a powder magnetic core, a magnetic element, and an electronic device. Provided are a soft magnetic alloy powder having a low coercive force, a method for producing the soft magnetic alloy powder capable of stably producing the soft magnetic alloy powder, a powder magnetic core containing the soft magnetic alloy powder, a magnetic element provided with the powder magnetic core, and an electronic device provided with the magnetic element. A method for producing a soft magnetic alloy powder, said soft magnetic alloy powder being produced from FexCuaNbb (Si1-y (B1-zCrz) y) 100-x-a-b [wherein 0.3 < = a < = 2.0, 2.0 < = b < = 4.0, 75.5 < = x < = 79.5, 0.55 < = y < = 0.91, and 0.015 < = z < = 0.185 are satisfied. A step for producing an amorphous alloy powder having an average particle diameter of 10.0 [mu] m or more and 45.0 [mu] m or less; and a step for producing the soft magnetic alloy powder by heating at a temperature of 420 DEG C to 620 DEG C. The crystal grain size measured by X-ray diffraction is 5.0 nm to 20.0 nm, and the volume resistivity of the compact is 9.0 * 10 <-3 > [Omega * cm] or less.

The invention discloses a magnesium-based solid hydrogen storage tank integrated with a resistance heating and electromagnetic coupling magnetic field structure, which comprises a tank body and a control cabinet integrated on the outer side wall of the tank body, a plurality of electrode plates are arranged in the tank body, and the electrode plates are electrically connected with a power supply cabinet on the side wall of the tank body through tabs on the electrode plates. The inner space of the tank body is divided into a plurality of hydrogen storage spaces by the plurality of electrode plates, magnesium-based solid hydrogen storage materials containing magnetic alloy metal and carbon materials are added into the hydrogen storage spaces through material adding ports formed in the outer side wall of the tank body, a temperature sensor is arranged in each hydrogen storage space, and a pressure sensor is arranged at the top of the tank body; a hydrogen inlet / outlet is formed in the top end of the tank body; a communicating hole for communicating two adjacent hydrogen storage spaces is formed in the center of the electrode plate. Through the synergistic effect of an electric field and a magnetic field, the thermal management performance of the magnesium-based hydrogen storage material is effectively improved, the hydrogen desorption cold start time is shortened, the thermal effect influence in the hydrogen charging and desorption process is reduced, stress concentration caused by volume expansion is relieved, and the hydrogen storage and release performance of the magnesium-based material is improved.

The invention relates to a nanocrystalline soft magnetic alloy with high magnetic conductivity, a strip and a preparation method and application of the nanocrystalline soft magnetic alloy. The chemical formula of the nanocrystalline soft magnetic alloy with the high magnetic conductivity is FeaCobNicTidSihBfRjMk (NbO) x, wherein R is a rare earth element and is selected from at least one of La, Nd and Y; m is a transition metal element and is selected from at least one of Zr and Hf; a, b, c, d, h, f, j and k are atomic percentages of the corresponding components: 72 < = a < = 85, 2 < = b < = 5, 3 < = c < = 8, 1 < = d < = 2, 2 < = h < = 4, 2 < = f < = 4, 0.5 < = j < = 1, 0.5 < = k < = 2, 0.5 < = x < = 2, and the sum of the atomic percentages of all the components is 100. The nanocrystalline soft magnetic alloy disclosed by the invention has high magnetic conductivity, low loss and excellent mechanical property and thermal stability.

The present invention provides an iron-based nanocrystalline soft magnetic alloy powder, a soft magnetic composite material and a preparation method thereof, belonging to the technical field of soft magnetic materials. The iron-based nanocrystalline soft magnetic alloy powder has a heterogeneous nanocrystalline structure comprising a three-dimensional island-shaped amorphous region and a nanocrystalline region. The diameter of the three-dimensional island-shaped amorphous region is 50-100 nm, and the number density of the three-dimensional island-shaped amorphous region is 10 19 ‑10 20 m ‑3 The iron-based nanocrystalline soft magnetic alloy powder has the advantages of high sphericity, high saturation magnetization and low coercive force; the soft magnetic composite material comprises soft magnetic powder and a coating layer coated on the surface of the soft magnetic powder, and the coating layer comprises a binder, wherein the soft magnetic powder is the iron-based nanocrystalline soft magnetic alloy powder provided by the present invention, or is composited with at least one of iron-nickel, iron-nickel-molybdenum, iron-silicon, iron-silicon-aluminum, iron-silicon-chromium, carbonyl iron and pure iron powder, and has the advantages of low high-frequency loss, high magnetic permeability and high DC bias.

The invention provides a magnetically soft alloy-based wave-absorbing composite material as well as a preparation method and application thereof, and belongs to the technical field of electromagnetic wave absorbing materials. The wave-absorbing composite material provided by the invention comprises various magnetically soft alloy substrates prepared from elements such as iron, cobalt, nickel and the like and nitrogen-doped carbon coating the surfaces of the magnetically soft alloy substrates. The coercive force of the soft magnetic alloy is relatively low, so that the magnetic domain wall movement and magnetic moment rotation resistance in the material are reduced, the magnetic conductivity is relatively high, and the nitrogen-doped carbon with high dielectricity is combined to construct a magnetic-dielectric structure, so that the impedance matching between the composite material and the space is improved, and the efficient absorption of electromagnetic waves is promoted. The magnetically soft alloy-based wave-absorbing composite material has the characteristics of strong electromagnetic wave absorption performance and wide absorption frequency band, and is simple in preparation technology and easy for large-scale production.

The invention discloses low-loss superfine soft magnetic alloy powder and a manufacturing method and application thereof, belongs to the technical field of soft magnetic materials, and particularly relates to a method for preparing superfine alloy powder by smelting iron, nickel, manganese, aluminum, silicon and chromium into alloy and adopting an evaporation condensation method. Then coating the surface of the superfine alloy powder with a phosphating film by using a medium-temperature zinc-manganese phosphating solution and a phosphating auxiliary agent, and then coating with a silicon dioxide layer to obtain coated low-loss superfine soft magnetic alloy powder; wherein the phosphating auxiliary agent at least comprises a sodium sulfonate derivative, and in the preparation of the sodium sulfonate derivative, azelaic acid dichloride and 1-octylene-3-alcohol are subjected to a reaction, and then sodium hydrogen sulfite is added for a reaction to obtain the sodium sulfonate derivative. The D50 particle size of the prepared low-loss superfine magnetically soft alloy powder ranges from 100 nm to 3000 nm; the resistivity is high, and the resistivity reaches 9.0 omega.cm or above; and the power loss is low and is lower than 320.3 mW / cm < 3 >, and the method can be used for preparing a high-performance inductor.

The invention relates to the technical field of soft magnetic ferrite materials, in particular to a preparation method of a high-permeability soft magnetic ferrite core material, which comprises the following steps: firstly, preparing FeSiCrBCu soft magnetic alloy powder with uniform components and controllable particle size through a single-roller quenching and hydrogen decrepitation process, and laying a structural foundation for excellent magnetic performance; and then a mechanical stirring-ultrasonic synergistic coating technology is utilized, so that the ferrite precursor uniformly coats the alloy powder, an effective core-shell structure is formed, and solid-phase reaction and crystal grain uniform growth during sintering are promoted. Besides, a multi-task deep learning model (MTL-DL) based on transfer learning is adopted to carry out multi-objective collaborative optimization on the sintering process, accurately match and dynamically adjust key parameters, and accurately regulate and control the material densification process, the grain size and the phase distribution on the microcosmic level, so that the problem that the microstructure and component uniformity are difficult to accurately control in the prior art is solved; therefore, the problems of poor material performance and high power loss are solved.

The invention provides amorphous nanocrystalline soft magnetic alloy powder, a preparation method thereof and a magnetic powder core, and relates to the technical field of soft magnetic materials. According to the preparation method of the amorphous nanocrystalline soft magnetic alloy powder, a high-energy electric pulse technology is adopted, an amorphous alloy material is instantly and rapidly heated and exploded, the particle size of the powder is accurately regulated and controlled by accurately regulating and controlling an energy input parameter and a spacing parameter, and the high-sphericity soft magnetic powder with the median particle size being 0.5-5 microns is prepared; the uniformity and dispersity of the powder are remarkably improved, and the problem of low particle size control precision in the prior art is solved. The preparation method is simple in technological process and low in energy consumption, impurities and defects introduced in a traditional multi-step technology are avoided, and the purity and performance of the material are improved. The prepared amorphous nanocrystalline soft magnetic alloy powder has the characteristics of small particle size, high sphericity, high saturation magnetization, low coercive force and high yield, and is particularly suitable for the fields of high-frequency magnetic elements and precision electronic devices.

The invention relates to a high-strength FeCo-V-Nb magnetically soft alloy and a heat treatment method. The invention belongs to the field of magnetically soft alloy materials. The high-strength magnetically soft alloy comprises the following components in percentage by weight: 40-60% of Fe; 40%-60% of Co; 1 to 3 percent of V; and 0.01 to 1% of Nb. And smelting, casting, hot rolling and cold rolling are carried out to finally obtain the thin strip with the thickness of 0.25-0.45 mm. The invention provides a heat treatment method of a high-strength FeCo-V-Nb magnetically soft alloy. The heat treatment method comprises the following steps: carrying out heat treatment at 700-900 DEG C under an anti-oxidation condition, and cooling through water quenching. The invention aims to solve the problem that the existing iron-cobalt magnetically soft alloy cannot obtain relatively high magnetic property and mechanical property at the same time, so that the mechanical property and the magnetic property of the iron-cobalt magnetically soft alloy under the conditions of room temperature and high temperature are remarkably improved.

The invention relates to an impregnation liquid as well as a preparation method and application thereof. The impregnation liquid comprises magnetically soft alloy powder, a binder and an active diluent, the binder comprises first organic resin and second organic resin; the first organic resin and the second organic resin are different in type. According to the impregnation liquid provided by the invention, the soft magnetic alloy powder, the first organic resin, the second organic resin and the reactive diluent are introduced, so that under the synergistic effect of the substances, the direct current superposition characteristic of the impregnated magnetic powder core is improved while the treated magnetic powder core still keeps relatively high magnetic conductivity; the mechanical strength of the magnetic powder core is enhanced, and the reliability of the magnetic powder core in a cold and hot shock environment is improved.

The invention relates to an iron-nickel magnetically soft alloy, in particular to an iron-nickel magnetically soft alloy with high magnetic conductivity and high magnetic induction and a preparation method of the iron-nickel magnetically soft alloy. The iron-nickel magnetically soft alloy comprises the following chemical components in percentage by mass: 48.00 to 51.00 percent of N , 0.10 to 0.30 percent of Mn, 2.50 to 5.00 percent of Cr, 1.00 to 1.50 percent of T , 0 to 0.30 percent of A < l >, less than 0.10 percent of S , less than 0.02 percent of C and the balance of Fe and inevitable impurities. The preparation method is realized based on the chemical components. On the basis of an existing 1J50 alloy, 2.50-5.00% of Cr, 1.00-1.50% of Ti and 0-0.30% of A are added, and the mechanical property, corrosion resistance and conductivity of the iron-nickel magnetically soft alloy can be improved on the premise that the magnetic property of the iron-nickel magnetically soft alloy is not affected.

The invention discloses a low-coercivity magnetically soft alloy and a preparation method thereof, belongs to the technical field of magnetically soft alloys, and solves the problem of poor coercivity and strength matching in the prior art. The low-coercivity magnetically soft alloy comprises the following components in percentage by mass: less than or equal to 0.01% of C, 0.50-2.00% of Si, less than or equal to 0.50% of Mn, 0.30-0.80% of Al, 12.00-15.00% of Cr, less than or equal to 0.001% of S, less than or equal to 0.001% of P and the balance of Fe and other inevitable impurities. The low-coercivity magnetically soft alloy is low in coercivity and high in strength.

The invention provides an MXene-based electromagnetic shielding material for anchoring 0 / 2-dimensional magnetic metal and preparation and application thereof.The electromagnetic shielding material comprises an MXene material, nearly-0-dimensional magnetic alloy microspheres and two-dimensional flaky magnetic metal, the MXene material is of a lamellar structure, the magnetic alloy microspheres and the flaky magnetic metal are embedded between lamellas of the MXene material, and the two-dimensional flaky magnetic metal is embedded between the lamellas of the MXene material. The mass of the magnetic alloy microspheres accounts for 8.3%-33.3% of the total mass of the electromagnetic shielding material, and the mass of the flaky magnetic metal accounts for 8.3%-33.3% of the total mass of the electromagnetic shielding material. The preparation method of the electromagnetic shielding material adopts a direct compounding mode of an anionic surfactant and an ultrasonic process. The preparation method is simple in process, the component proportion is easy to control, and the prepared electromagnetic shielding material is rich in electromagnetic loss mechanism, large in effective shielding bandwidth and remarkable in electromagnetic shielding effectiveness and has wide application prospects in electromagnetic interference prevention of MEMS sensor packaging, automobile electronic products, stealth fighter planes and wearable electronic equipment.

The invention discloses magnetically soft alloy powder and a preparation method and application thereof, and relates to the technical field of magnetic materials. The specific preparation method comprises the following steps: firstly, in an inert atmosphere, mixing, heating and smelting various raw materials into an alloy, continuously heating to obtain mixed steam, condensing the mixed steam, and collecting to obtain alloy powder; and then organic silicon resin is used as an insulating material, the insulating material is added into a solvent, then the alloy powder is added and evenly mixed, and finally the magnetically soft alloy powder is obtained through drying. The method is simple in process and short in production period, and a soft magnetic core made of the soft magnetic alloy powder prepared through the method has the advantages of being high in initial permeability and low in magnetic core loss.

The invention belongs to the technical field of magnetic shielding materials, and particularly relates to a nanocrystalline slotting and soft magnetic alloy powder filling composite magnetic sheet and a preparation method thereof. The composite magnetic sheet comprises a magnetic material layer formed by alternately compounding a nanocrystalline material layer and a double-faced adhesive tape, the magnetic material layer is provided with regularly distributed slotting structures, and the slotting structures are filled with soft magnetic alloy powder. The preparation method comprises the following steps: alternately compounding a nanocrystalline material layer and a double-faced adhesive tape to form a magnetic material layer, and performing die cutting to form a regularly distributed slotting structure; or the nanocrystalline material composite layer is subjected to die cutting to form a regularly-distributed through slotting structure, and then the structure is compounded with the composite layer which is not slotted to obtain the magnetic material layer; and then filling and fixing the slotting structure by adopting soft magnetic alloy powder to obtain the composite magnetic sheet. According to the invention, the defect of easy magnetic saturation due to local lack of magnetic materials after slotting can be avoided, and the obtained composite magnetic sheet has low loss and high saturation current at the same time.

The invention relates to an amorphous alloy material, a preparation method thereof and a magnetic alloy product. A chemical composition of the amorphous alloy material is FeaPbBcCdCue, a, b, c, d and e represent atomic percentages of elements, 70 < = a < = 80, 0 < = b < = 14, 0 < = c < = 14, 3 < = d < = 6, 0 < e < = 2, and a + b + c + d + e = 100. Elements of the amorphous alloy material comprise specific components with a specific matching relation, and all the components are coordinated and matched through the specific matching relation, so that the amorphous alloy material keeps an amorphous structure and excellent soft magnetic performance at the same time.

The invention discloses a (Pr, Ce) FeB-PrFeCu alloy ribbon and a preparation method and application thereof.The alloy ribbon takes Pr, Ce, Fe, B and Cu as raw materials, the chemical formula of the alloy ribbon is 70 at.% (Pr0. 3Ce0. 7) 2Fe14B + 30 at.% Pr6Fe13Cu, the addition amount of Pr and Ce is additionally increased by 0.5 at.% on the basis of the theoretical content to serve as loss compensation, a (Pr, Ce) FeB-PrFeCu alloy ingot is obtained through overturning smelting, then vacuum melt-spinning is conducted through a customized quartz tube, and the (Pr, Ce) FeB-PrFeCu alloy ribbon can be obtained. The permanent magnetic (Pr, Ce) FeB-PrFeCu alloy thin strip is prepared, and the permanent magnetic (Pr, Ce) FeB-PrFeCu alloy thin strip is obtained; the main phase component of the (Pr, Ce) FeB-PrFeCu alloy ribbon is (Pr, Ce) 2Fe14B, and the intergranular phase of the (Pr, Ce) FeB-PrFeCu alloy ribbon is Pr6Fe13Cu. The preparation method comprises the following steps: 1, smelting a (Pr, Ce) FeB-PrFeCu gold cast ingot; and 2, preparing the (Pr, Ce) FeB-PrFeCu alloy thin strip. When the material is used as a neodymium iron boron permanent magnet material, the coercive force of the material is 15.7-18.1 kOe, and the residual magnetism of the material is 33.5-49.5 emu / g.

A wave-absorbing film and a preparation method therefor. The wave-absorbing film comprises a base material and a wave-absorbing layer provided on the base material. The wave-absorbing layer comprises a base and wave-absorbing units, the plurality of wave-absorbing units being arranged inside the base in a dot array; and the wave-absorbing layer is made of a soft magnetic composite material and a polymer elastomer, the mass fraction ratio of the soft magnetic composite material in the wave-absorbing layer ranging from 10% to 80%. According to the present wave-absorbing film and the preparation method therefor, the wave-absorbing layer comprises the plurality of wave-absorbing units arranged inside in the base in a dot array. The regular arrangement structural design can effectively improve the degree of matching between the impedance of the wave-absorbing film and the impedance of free space, and increase the effective absorption bandwidth. The soft magnetic alloy composite material uses a two-dimensional flaky multilayer structure, and comprises, from inside to outside, a soft magnetic alloy, an Al2O3 layer and an amorphous carbon layer. Compared with a material using only the soft magnetic alloy, the soft magnetic alloy composite material using the multilayer structure has the excellent characteristics of various functional materials.

The invention discloses a design and preparation of a novel microwave absorbing material of a magnetic CoFe / C at bamboo-like carbon nanotube (CoFe / C at bamboo-like CNTs) core-shell nanocomposite. The material has a hollow core-shell structure, an inner core of the core-shell structure is made of CoFe magnetic alloy, and an outer shell layer of the core-shell structure is made of bamboo-like carbon nanotubes. The magnetic CoFe / C and bamboo-like CNTs core-shell nano composite microwave absorbing material disclosed by the invention shows excellent electromagnetic wave loss capability in a frequency range of 2.0 to 18.0 GHz. The preparation method comprises the following steps: uniformly mixing a metal-nitrilotriacetic acid chelate precursor with dicyandiamide according to a certain ratio, and annealing in argon, so as to prepare the magnetic CoFe / C bamboo-like CNTs core-shell nano composite microwave absorbing material with multiple components and rich heterogeneous interfaces.