31results about How to "Low coercivity" patented technology

The invention discloses a method for synchronously reducing hysteresis loss and eddy-current loss of a FeSiAl magnetic powder core, which comprises the following steps: preparing a salt solution of metal M which is low-melting-point metal with atomic radius unequal to that of Al atoms and can form a replacement solid solution with Al; adding the salt solution into the FeSiAl magnetic powder core, drying to obtain an insulated and coated magnetic powder core, and then adding a binder and a lubricant to prepare magnetic powder to be formed; and performing compression molding on the to-be-molded magnetic powder, and performing heat treatment to obtain the magnetic powder core. The low-melting-point M atoms are diffused into the FeSiAl matrix and occupy Al vacancies, lattice distortion can be reduced in the annealing process, and therefore coercive force and magnetic hysteresis loss are reduced; more importantly, after the FeSiAl is doped with the M atoms, the resistivity of the matrix is increased, eddy-current loss in the particles can be effectively inhibited, meanwhile, the Al2O3 coating layer generated through in-situ oxidation can effectively isolate the eddy-current loss among the particles, and therefore the magnetic hysteresis loss and the eddy-current loss are synchronously reduced through the method.

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 discloses a dielectric and magnetic loss coupling type multi-frequency high-absorption composite wave-absorbing material. The chemical formula of the composite wave-absorbing material is (FeCoNiCraMn) x. (BaTiO3) y, the invention also discloses a preparation method of the composite wave-absorbing material, which comprises the following steps: step 1, mixing iron, cobalt, nickel, chromium and manganese, and carrying out suspension smelting, vacuum gas atomization and sieving to obtain high-entropy alloy spherical powder; secondly, the flaky high-entropy alloy is obtained after ball milling; thirdly, the flaky high-entropy alloy is naturally cooled and then dried; and fourthly, the dried flaky high-entropy alloy is mixed with barium titanate powder, and ball milling is carried out. According to the composite wave-absorbing material, the FeCoNiCrMn series high-entropy alloy provides magnetic loss capacity, barium titanate provides dielectric loss capacity, the synergistic effect of multiple loss mechanisms is achieved, and the composite wave-absorbing material is suitable for the technical field of wave-absorbing materials.

According to the method for preparing the nanoscale carbonyl iron powder under the conditions of normal pressure and low temperature and the special integrated equipment for implementing the method, efficient cooling and nucleation of iron steam can be achieved by adopting a specially-designed micro-nano bubble generation device, and the nanoscale carbonyl iron powder which is narrow in particle size distribution, uniform in morphology and excellent in magnetic performance is prepared.

The invention relates to the technical field of soft magnetic ferrite materials, in particular to a nickel-zinc ferrite material as well as a preparation method and application thereof. The invention provides a nickel-zinc ferrite material. The nickel-zinc ferrite material comprises the following raw materials: main components and auxiliary components, wherein the main components comprise Fe2O3, NiO, ZnO and CuO; the mass percentage of Fe2O3 in the main component is 64.05 to 68.72 wt%, the mass percentage of NiO in the main component is 14.12 to 17.36 wt%, the mass percentage of ZnO in the main component is 11.61 to 15.02 wt%, and the mass percentage of CuO in the main component is 3.82 to 4.45 wt%; based on the total weight of the main components, the auxiliary components comprise 0.2 wt%-0.6 wt% of Al2O3, 0.05 wt%-0.25 wt% of SiO2 and 0.1 wt%-0.35 wt% of MnO2. According to the nickel-zinc ferrite material, specific main components and auxiliary components are selected, and the contents of the main components and the auxiliary components are limited, so that all the components generate a synergistic effect, and finally the nickel-zinc ferrite material with excellent comprehensive performance is obtained.

The invention provides a FeCo alloy / graphene foam composite material and preparation and application thereof, the FeCo alloy / graphene foam composite material comprises FeCo alloy particles and graphene foam, and the FeCo alloy particles are loaded on the surface of the graphene foam and embedded between sheet layers and pores of the graphene foam. Different graphene foam contents have great influence on the morphology structure, saturation magnetization intensity, electromagnetic parameters and the like of the product. Along with the increase of the content of the graphene foam, the loading area of the FeCo alloy is continuously increased, and the large-particle FeCo alloy loaded on the graphene sheet is continuously reduced. The saturation magnetization and the magnetic loss capability of the composite material are continuously reduced along with the increase of the content of the graphene foam, and the electrical loss capability is continuously improved.

The invention discloses an iron-based / alpha-Fe amorphous nanocrystalline soft magnetic alloy, which is based on an iron-based amorphous strip mainly comprising Fe element, and contains Co element with atomic fraction of 6%-8%, Cu element with atomic fraction of 0.7%-1%, and the balance of trace elements which are at least one of oxygen, sulfur, phosphorus, carbon, silicon, boron and the like. And carrying out stress relief annealing on the strip with the assistance of a magnetic field, and then carrying out crystallization treatment. Different from a traditional method for regulating and controlling the magnetic performance of the alloy through precipitation of a large number of nanocrystals, the alloy 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 invention discloses a YIG gyromagnetic ferrite material capable of effectively reducing ferromagnetic resonance line width and a preparation method thereof, the chemical formula of the YIG gyromagnetic ferrite material is Ca < 0.3 > CexY < 2.7-x > Mn < 0.05 > Zr < 0.45 > Fe < 4.5 > O12, x is greater than or equal to 0 and less than or equal to 0.5, the YIG gyromagnetic ferrite material has a complete garnet structure, Ca < 2 + > and Ce < 3 + > replace dodecahedral Y < 3 + > ions of a YIG ferrite lattice structure, and Mn < 2 + > and Zr < 2 + > respectively replace octahedral Fe < 3 + > of the YIG ferrite lattice structure; meanwhile, Bi2O3 is introduced as a sintering aid to promote the YIG ferrite to be fully sintered at 1280 DEG C, so that the microwave characteristics of the material are improved, the saturation magnetization is higher, the coercive force is lower, more importantly, the ferromagnetic resonance line width can be greatly narrowed, and the material becomes a base material of a microwave ferrite device with high integration level, small size and excellent electromagnetic performance.

The invention discloses a cobalt-based amorphous magnetically soft alloy material, preparation thereof and a composite wave absorbing structure based on magnetically soft alloy. The alloy material comprises the following components: CoaFebNicSidBeCrf, 60 < = a < = 70, 2 < = b < = 6, 0.5 < = c < = 5, 10 < = d < = 20, 10 < = e < = 20, 0.5 < = f < = 5, and a + b + c + d + e + f = 100, and the alloy material has low saturation flux density, low coercive force and high initial permeability, and also has excellent corrosion resistance and oxidation resistance. The composite wave-absorbing structure obtained by taking the amorphous magnetically soft alloy material as the frequency selective surface is simple, the pattern of the frequency selective surface is simple, and the manufacturing cost is low; the prepared wave-absorbing material is low in total thickness, effective absorption bandwidth is greatly improved, and the wave-absorbing material has the characteristics of lightness, thinness and broadband absorption and is of great significance in promoting development of light, thin and broadband wave-absorbing materials.

The invention discloses a variable range magnetic sensor based on a magnetic shielding effect and application, the variable range magnetic sensor comprises a magnetic shielding sleeve, a printed circuit board and a magnetoresistance sensing chip, the magnetic shielding sleeve is embedded in the printed circuit board, and the magnetoresistance sensing chip is arranged on the printed circuit board and located in the magnetic shielding sleeve. A single-layer double-opening permalloy magnetic shielding sleeve is nested on a PCB (Printed Circuit Board), and a magnetoresistance sensing chip is arranged in the magnetic shielding sleeve. The structure is designed to be used for increasing the measuring range of the magnetoresistance sensing chip, and dynamic adjustment of the measuring range of the sensor is achieved by adjusting the position and the thickness of the magnetic shielding sleeve. The sensor described by the invention can be better applied to a scene with a wide dynamic magnetic field range, and has better nonlinearity and anti-interference capability.

A low coercivity YIG substrate material for LTCC circulator and a preparation method thereof, belonging to the technical field of electronic ceramics. The present invention adopts Bi-Li-P combined substitution and introduces Bi 3+ , Li + , P 5+ Ion substitution of Y at 24c in YIG 3+ ions, Fe at positions 16a and 24d 3+ ions, resulting in significant lattice distortion, which greatly reduces the sintering temperature of the material, reducing the solid phase reaction broadening component in the ferromagnetic resonance line width of the sample. + , P 5+ The amount of ion substitution controls the ferrite grain growth and pore exclusion during the sintering process, so that the material obtains multiple dense microstructures; on the one hand, it is beneficial to increase the bulk density of the material and reduce the porosity, while obtaining a high saturation magnetization intensity and reducing the pore width in the ferromagnetic resonance line width; on the other hand, the increase in the average grain size of the material is beneficial to reducing the coercive force of the material.

The invention discloses a NiCuZn gyromagnetic ferrite material and a preparation method thereof, and belongs to the technical field of ferrite materials, the molecular formula of the material is Ni < 0.26 > Cu < 0.22 > Zn < 0.52 > Zr < x > Fe < 2-4x / 3O4, the invention discloses a NiCuZn ferrite and a preparation method thereof.The NiCuZn ferrite is prepared from NiCuZn ferrite, x is smaller than or equal to 0.03, the preparation method comprises the steps of burdening, primary ball milling, pre-sintering, secondary ball milling, granulation forming, sintering and the like, the NiCuZn ferrite has good magnetic performance, meanwhile, in order to meet the requirements for miniaturization and integration of LTCC, the sintering temperature is effectively lowered to 950 DEG C or below, good rotary magnetic performance is kept, and the preparation method is suitable for industrial production. Comprising relatively low ferromagnetic resonance line width, relatively low coercive force and relatively high saturation magnetization intensity.

The invention discloses a preparation method of an amorphous iron core, and belongs to the technical field of amorphous iron cores. The invention discloses a preparation method of an amorphous iron core, which comprises the following preparation steps: (1) winding an iron-based amorphous alloy strip to obtain an amorphous iron core blank; (2) carrying out pre-annealing treatment on the amorphous iron core blank; (3) winding copper strips inside and outside the amorphous iron core blank subjected to pre-annealing treatment, and performing secondary annealing treatment; and (4) putting the amorphous iron core blank subjected to secondary annealing treatment into an insulating adhesive for vacuum impregnation, taking out the amorphous iron core blank, and putting the amorphous iron core blank into a drying oven for drying to obtain the amorphous iron core.

The application relates to the technical field of magnetic particle imaging, and more particularly to an iron oxide nanoparticle and application of the iron oxide nanoparticle in magnetic particle imaging. The nanoparticle is an octahedral superparamagnetic ferroferric oxide nanoparticle, the nanoparticle is synthesized by adding a surfactant and controlling a reaction rate through a high-temperature thermal decomposition method, the surfactant includes oleic acid and oleylamine, the octahedral superparamagnetic ferroferric oxide nanoparticle is coated with an amphiphilic polymer, the amphiphilic polymer includes polymaleic anhydride-1-octadecenoic acid and polystyrene maleic anhydride copolymer, and the outer layer of the amphiphilic polymer includes biological membranes such as macrophage membranes, red blood cell membranes, neutrophil membranes and tumor cell membranes according to biological application requirements. The surface of the octahedral magnetic particle is a crystal face, the crystal face has low spin disorder and low anisotropy, so that the octahedral magnetic particle has the advantages of low coercivity and high initial magnetic susceptibility, and thus becomes a high-sensitivity magnetic particle imaging tracer.

This invention belongs to the field of stainless steel. Specifically, this invention relates to a fine-grained, high-strength, and high-toughness soft magnetic stainless steel synergistically strengthened by Ti and Cu, and soft magnetic stainless steel profiles containing the same. The soft magnetic stainless steel of this invention is composed of the elements Cr, Cu, Mo, Ti, C, Fe, and unavoidable impurities. In the preparation process of the soft magnetic stainless steel profile of this invention, according to the composition, the material is smelted and processed through steps such as solution treatment, hot rolling, cold drawing, recrystallization annealing, and aging. The process parameters in each step are strictly controlled to prepare a soft magnetic stainless steel profile with a fine and uniform microstructure, strengthened by trace carbide precipitation and high-density dispersed coherent nano-precipitates, and possessing excellent low-temperature toughness and soft magnetic properties. The fine-grained, high-strength, and high-toughness soft magnetic stainless steel profile synergistically strengthened by Ti and Cu of this invention can be effectively applied to solenoid valves and related products that operate in low-temperature media and require certain strength and toughness, and has good prospects for promotion and application value.

The application discloses a low-pressure forming high-frequency low-loss SMC magnetic powder core and a preparation method and application thereof, wherein amorphous iron-based alloy fine powder is added into iron-silicon-chromium coarse powder, different contents of nano calcium carbonate are added into the compounded magnetic powder, and then high-content epoxy resin is melted and mixed in a mixing mill to obtain a high-fluidity mixing material.After crushing, a low-pressure forming high-frequency low-loss SMC granular material is obtained, which is formed by hot pressing under low pressure, and the obtained annular magnetic powder core is annealed in a vacuum oven, so that the low-pressure high-frequency low-loss SMC magnetic powder core is obtained.Through the method, the SMC magnetic powder core with a forming pressure less than 50 MPa and a magnetic loss less than 2100 kW / m 3 under the conditions of 20 mT and 2 MHz can be obtained.

The invention discloses a neodymium-iron-boron magnet and a preparation method and application thereof. The first easy demagnetization area, the non-easy demagnetization area and the second easy demagnetization area are sequentially arranged in the direction perpendicular to the magnetizing direction; the coercive force ratio of the non-easy demagnetization area to the first easy demagnetization area is (0.7-1): 1 and is not 1: 1, and the coercive force of the first easy demagnetization area is the same as that of the second easy demagnetization area; the concentrations of heavy rare earth elements in the first easy demagnetization area and the second easy demagnetization area are the same, and in the first easy demagnetization area, 4 is 1-1.3; and in the non-demagnetization region, 1 is 1 to 1.2, 2 is 1 to 1.25, and 3 is 1 to 1.3. The neodymium-iron-boron magnet can ensure high coercive force, high thermal stability, high squareness and high magnetic moment on the premise of reducing the heavy rare earth consumption of the neodymium-iron-boron magnet.

The application provides an amorphous nanocrystalline soft magnetic alloy powder and a preparation method and a magnetic powder core thereof, and relates to the technical field of soft magnetic materials. The preparation method of the amorphous nanocrystalline soft magnetic alloy powder adopts high-energy electric pulse technology to realize instantaneous rapid heating and explosion of the amorphous alloy material, and realizes accurate control of the powder particle size by accurately controlling energy input parameters and interval parameters, thereby preparing high-sphericity soft magnetic powder with a median particle size of 0.5-5 mu m, significantly improving the uniformity and dispersity of the powder, and solving the problem of low particle size control accuracy in the prior art. Moreover, the preparation method has a simple process flow and low energy consumption, avoids impurities and defects introduced in the traditional multi-step process, and improves the purity and performance of the material. The prepared amorphous nanocrystalline soft magnetic alloy powder has the characteristics of small particle size, high sphericity, high saturation magnetization, low coercivity and high yield, and is particularly suitable for the field of high-frequency magnetic elements and precision electronic devices.

The application discloses a preparation method of a soft magnetic material for a car fuel injection system, and optimizes and accurately controls alloy element proportioning, controls molybdenum content to improve corrosion resistance, optimizes smelting mode to improve sulfur content, improves cutting performance, optimizes rolling process, improves steel ingot-steel billet rolling ratio, improves sulfide distribution and shape, improves cutting performance and improves material original grain size, designs continuous furnace heat treatment process, simulates room furnace material different temperature section heating-heat preservation-cooling slow cooling process, improves production efficiency, and meets material technical indexes at the same time. The application has the beneficial effect that the preparation of a product with low coercive force, high magnetic permeability and high strength is realized, and the index requirements of the product with coercive force (Hcb) not more than 200 A / m, tensile strength (Rm) not less than 450 MPa, hardness (HRB) 80-90 and grain size not less than 4 levels under an applied magnetic field of 50000 A / m are met.

The invention relates to the technical field of amorphous alloy mechanical and magnetic coupling, and discloses a method for preparing an iron-based amorphous alloy with high toughness and plasticity and excellent magnetic performance through high-throughput monitoring, and the method comprises the following steps: high-throughput preparation, parallel high-throughput detection, performance association and component locking, and component data according to a target component area. According to the method, the research and development efficiency and the performance screening precision of the iron-based amorphous alloy are greatly improved, organic combination of high toughness and plasticity and excellent magnetic performance is successfully achieved through scientific component design and process control, and application and development of the iron-based amorphous alloy in the field of high-end soft magnetic materials are promoted. The method has wide popularization value and application prospect, and can provide powerful technical support and theoretical guidance for material innovation in related fields.

The invention relates to an iron-based amorphous nanocrystalline alloy and a preparation method thereof. The preparation method comprises the following steps that iron-based alloy raw materials are weighed according to a preset proportion; the iron-based alloy raw material is subjected to induction melting to obtain an alloy ingot; carrying out melt spinning on the alloy ingot to obtain an amorphous strip; the method comprises the following steps: cutting an amorphous strip, putting the cut amorphous strip into a porcelain boat, putting the porcelain boat into a non-heating area of a tubular furnace, repeatedly vacuumizing the tubular furnace, introducing nitrogen, finally maintaining a circulating nitrogen atmosphere in the tubular furnace, when the heating area of the tubular furnace is heated to a preset temperature of 600-900 DEG C, pushing the porcelain boat into the heating area of the tubular furnace, and preserving heat at the preset temperature for 10-80 seconds, and then the porcelain boat is quickly pushed back to the non-heating area for cooling. The iron-based amorphous nanocrystalline alloy has good amorphous forming ability and a wide annealing temperature window, the iron-based amorphous nanocrystalline alloy prepared through the preparation method can have high saturation flux density and low coercive force at the same time, and the iron-based amorphous nanocrystalline alloy is suitable for large-scale industrial production.

The invention discloses a high-recording-density magnetic medium based on exchange coupling and a preparation method of the high-recording-density magnetic medium. The high-recording-density magnetic medium comprises a first soft magnetic layer, a hard magnetic layer, a second soft magnetic layer, a non-magnetic supporting body and a back coating layer which are sequentially stacked. The soft magnetic layers are added above and below the magnetic recording layer, so that soft magnetic particles and hard magnetic recording particles can be in proper exchange coupling strength; when a reversal field is applied, the soft magnetic part firstly rotates, and the hard magnetic part is helped to reverse through exchange coupling, so that the required reversal field can be reduced; the exchange coupling medium can maintain good thermal stability while reducing the coercive force because the exchange coupling effect can stabilize magnetization and improve the energy barrier, thereby preventing the magnetization state from spontaneously overturning at high temperature; on the other hand, by optimizing the coupling strength of the soft magnetic layer and the hard magnetic layer, the exchange coupling magnetic recording medium can improve the signal-to-noise ratio, reduce the read noise and improve the reliability of the stored data.

This application discloses a rotor, a motor, a drive assembly, and a vehicle, belonging to the field of vehicle technology. The rotor has a first magnetic part and a second magnetic part, which are arranged at intervals along the circumference of the rotor, and the polarities of the first magnetic part and the second magnetic part are opposite; wherein, at least a portion of the coercivity of the second magnetic part is less than the coercivity of the first magnetic part.

The present application relates to a cobalt-based amorphous soft magnetic material, a constant magnetic permeability core, and a preparation method and application in the field of new material soft magnetic alloys. In terms of atomic percentage, the soft magnetic material is composed of the following elements: Fe: 0.5~5%, Mn: 1~6%, Mo: 3~6%, Si: 10~20%, B: 5~20%, Co: balance; and the sum of the atomic percentage content of Mn and Mo is 4~8%. The present application controls the content of Co, Fe, Mn, Mo, Si and B elements within a specific range, so that the cobalt-based amorphous constant magnetic permeability core prepared using the cobalt-based amorphous soft magnetic material as a master alloy has different constant magnetic fields, and the magnetic permeability is 2800~3500. At the same time, the cobalt-based amorphous constant magnetic permeability core also has high saturation magnetic field intensity Bs, low loss, low coercive force, and especially has good frequency characteristics and bias characteristics, meeting the use requirements of high-precision current transformers.

The invention belongs to the technical field of preparation of soft magnetic metal materials, and particularly relates to an iron-based nanocrystalline alloy with high saturation magnetic polarization strength and a preparation method of the iron-based nanocrystalline alloy. The iron-based nanocrystalline alloy with high saturation magnetic polarization strength has a general formula of FeaBbCcSidPeCufMg, wherein a, b, c, d, e, f and g respectively represent the atomic percentages of Fe, B, C, Si, P, Cu and M; the atomic percentage of carbon is not lower than the atomic percentage of silicon and the atomic percentage of carbon is not lower than the atomic percentage of phosphorus; or the sum of the atomic percentages of carbon and phosphorus is not less than the atomic percentage of silicon. The iron-based nanocrystalline alloy with high saturation magnetic polarization strength has the advantages of high iron content, high saturation magnetic polarization strength and low coercive force, does not contain other metal elements (such as noble metals), easily oxidized elements, high-melting-point elements and the like except necessary copper and trace vanadium, indium, bismuth and tin, is low in raw material cost and low in requirements on industrial production equipment, and is beneficial to industrial production.

This invention belongs to the field of magnetic functional materials technology, specifically relating to an amorphous nanocrystalline ribbon and its preparation method. The amorphous nanocrystalline ribbon is composed of the following raw materials in the indicated mass percentages: Nb 5.6-6.5 wt%, Si 9.5-10.5 wt%, B 1-2 wt%, Cu 0.5-1 wt%, Co 0.1-0.2 wt%, Zr 0.05-0.1 wt%, rare earth elements 0.4-1.5 wt%, high-entropy oxide 0.5-1.0 wt%, with the balance being Fe. The high-entropy oxide is prepared by adding ferric chloride, cobalt chloride, nickel chloride, manganese chloride, and scandium chloride to diethylene glycol, heating and stirring under sealed conditions, followed by centrifugation, washing, drying, and calcination to obtain the high-entropy oxide. The amorphous nanocrystalline ribbon prepared by this invention exhibits high magnetic permeability, low coercivity, and high stability within the temperature range of -40℃ to +150℃.

The invention relates to a preparation method of a high-magnetic-permeability epoxy glass cloth laminated board, which comprises the following steps: adding epoxy resin, a curing agent and a solvent into a reaction kettle to react for 4-6 hours, cooling after the reaction is finished, and adding a catalyst to obtain an epoxy resin polymer; mixing a high-magnetic-conductivity material with an epoxy resin polymer to obtain a magnetic epoxy resin adhesive; injecting a magnetic epoxy resin adhesive into a slurry tank of a gluing machine, and dipping, coating and gluing the alkali-free glass cloth to obtain a magnetic epoxy gluing cloth; the magnetic epoxy upper adhesive tape is stacked and then placed into a pressing machine to be pressed and cured, and the high-magnetic-conductivity epoxy glass cloth laminated board is obtained; the high-magnetic-conductivity material comprises any one or a mixture of more of pure iron, a silicon steel sheet, an iron-aluminum alloy, a soft magnetic ferrite composite material and an iron-cobalt alloy. The method has the effect of improving the magnetic permeability of the glass cloth laminated board.

This invention relates to the field of thick and thin film materials for electronic components, specifically to a flexible thick and thin film magnetic core material for high-frequency current sensors used in power cable condition monitoring and its preparation method. The method involves preparing a main component target material using NiO, CuO, ZnO, and Fe2O3 powders as raw materials; and an auxiliary component target material using SiO2, La2O3, CaCO3, and BaTiO3 powders as raw materials. Combined with deposition process control and high-temperature sintering, a soft magnetic ferrite is prepared. A polyimide film is used as a flexible substrate material, and the soft magnetic ferrite material is completely adhered to the flexible substrate material to obtain the flexible thick and thin film magnetic core material. This material exhibits high permeability and low loss, which can significantly improve the detection level of power cables and has broad application prospects.

The general formula of the high-strength plastic soft-magnetic high-entropy alloy serving in the wide temperature range is FeaCobNicAldTieSifCug, 26% < = a < = 36%, 25% < = b < = 38%, 22% < = c < = 28%, 3% < = d < = 8%, 3% < = e < = 7%, 0.5% < = f < = 2%, 0.5% < = g < = 2%, a + b + c + d + e + f + g = 100%, and a, b, c, d, e, f and g are molar percentages of corresponding elements respectively. The invention further discloses a preparation method of the wide-temperature-range service high-strength plastic soft magnetic high-entropy alloy. The high-strength plastic soft magnetic high-entropy alloy serving in the wide temperature range has excellent soft magnetic performance, tensile strength and fracture toughness within the wide temperature range of 77-300K, and the alloy has wide application prospects in the field of magnetic materials under extreme conditions.

The invention belongs to the technical field of magnetic metal material preparation, and particularly relates to an iron-based amorphous alloy with low coercive force, high ductility and toughness and strong forming ability and a preparation method. The iron-based amorphous alloy has a general formula of Fe B C < c > S < d > P < e > M < f >, wherein M is V; 0 < = f < = 0.8; d > e; 0.13 < = b / a < = 0.17; d + e < = c; or 4.0 < = c + d + e < = 5.0. The saturation flux density of the iron-based amorphous alloy is larger than or equal to 1.66 T or the magnetic induction intensity B800 under the condition of 800 A / m is larger than or equal to 1.65 T, the coercive force after annealing is smaller than or equal to 1.0 A / m, and the iron-based amorphous alloy has high amorphous forming ability and bending toughness. The iron-based amorphous alloy provided by the invention has high saturation flux density, low coercive force and low iron loss. The iron-based amorphous alloy does not contain precious metal elements, easy-to-oxidize elements and high-melting-point elements, is low in cost, has low requirements on industrial equipment and is beneficial to industrial production.