63 results about "Magnetic phase" patented technology

The invention discloses a FeNi soft magnetic composite material based on tetrabutyl orthosilicate hydrolysis coating and a preparation method of the FeNi soft magnetic composite material. According to the method, through a controllable sol-gel process, tetrabutyl orthosilicate is hydrolyzed to generate SiO2 gel, then a uniform and ultrathin SiO2 gel layer is generated on the surface of FeNi powder in situ, and then heat treatment densification is performed to obtain the FeNi soft magnetic composite material coated with SiO2 in an insulation mode. The SiO2 insulating layer is firmly combined with the matrix metal powder, the thermal stability is good, high frequency and high resistivity are achieved, and meanwhile dilution of non-magnetic relative magnetic performance is reduced to a great extent. The final magnetic core is obtained through compression molding and annealing heat treatment, has the excellent characteristics of high effective magnetic conductivity and low high-frequency magnetic core loss, and is particularly suitable for various efficient and miniaturized power electronic devices in the MHz frequency band.

The application discloses a micro patch power inductor based on micro area 3D printing and a preparation method thereof, and belongs to the technical field of 3D printing micro inductor devices. The preparation method uses Fe-based soft magnetic powder as a magnetic phase raw material to prepare a 3D printing support medium; a micro area 3D printing method is used to print at least one group of coils and lead-out ends of the coils in the support medium, so that the coils and the lead-out ends are completely embedded in the support medium, and an inductor blank is formed; after the support medium and the inductor blank are separated, the inductor is prepared, the inductor is cleaned and silver-plated; the inductor after silver-plating is annealed, and a micro patch power inductor is prepared. The method can print micron-level coils, the prepared inductor has a smaller volume, can reach a wire diameter of 10 um, has a good yield, can be annealed, the magnetic permeability of the magnetic material is improved, the magnetic hysteresis loss is reduced, and the prepared inductor has higher electromagnetic performance under the same volume condition.

The invention belongs to the technical field of permanent magnet materials, and relates to a nanocrystalline composite permanent magnet material and a manufacturing method thereof. The nanocrystalline composite permanent magnet material comprises a hard magnetic phase and a soft magnetic phase, the grain size of the hard magnetic phase and the grain size of the soft magnetic phase are independently smaller than or equal to 25 nm; the content of the soft magnetic phase is greater than 40 wt.%; the hard magnetic phase comprises a hard magnetic main phase, the proportion of the hard magnetic main phase in the hard magnetic phase is larger than 50 wt.%, and the hard magnetic main phase is a rare earth cobalt-based hard magnetic phase. The maximum magnetic energy product of the nanocrystalline composite permanent magnet material obviously exceeds the theoretical upper limit of the magnetic energy product of the single-phase hard magnetic material of the hard magnetic main phase. The giant magnetic energy product effect of the nanocrystalline composite permanent magnet material is realized by strictly controlling the raw material ratio and the preparation process.

A device and method for high speed metamagnetic resistive switching provides a metamagnetic phase transitioning (MPT) portion formed on a substrate between terminals. The MPT portion is tuned for temperature-responsive transitions between magnetic phases through a transition phase. The phases are delineated by phase boundaries each traversed at different critical temperatures depending on direction of traversal. The critical temperatures of each phase boundary are mutually offset by a hysteretic shift. The MPT portion is boosted across one phase boundary responsive to thermal actuation pulsed in a first direction to reach or exceed both critical temperatures of that phase boundary in the first direction, and boosted across the other phase boundary responsive to thermal actuation pulsed in a second direction to reach or exceed both critical temperatures of that phase boundary in the second direction. The electrical conduction path is thereby adjusted in resistivity for switching between ON and OFF states.

The present disclosure relates to an anisotropic bulk magnet and a method for manufacturing the same. The anisotropic bulk magnet has a high fraction of a (Re,Ce)2(Fe,Ti)14B phase (magnetic phase), a low fraction of a (Re,Ce)Fe2 phase (non-magnetic phase), a fine crystal grain size, an excellent degree of crystal grain alignment, and a high rare earth element content at an interface of the crystal grain, and therefore, may have excellent magnetic properties such as coercivity and maximum magnetic energy product.

A rare-earth permanent magnet powder, wherein the rare-earth permanent magnet powder comprises 4 to 12 atomic% Nd, 0.1 to 2 atomic% C, 10 to 25 atomic% N and 62.2 to 85.9 atomic% T, wherein the T is Fe or FeCo and the main phase of the rare-earth permanent magnet powder is a hard magnetic phase with a TbCu7 structure; wherein the rare-earth permanent magnet powder further comprises 1 to 5 atomic% of element A and 0.1 to 2 atomic% of element boron; where the element A is Zr and / or Hf, the ratio of the content of the element boron to the content of the element A is 0.1 to 0.5; where the content of the element Nd and the element A in the rare-earth permanent magnet powder is 4 to 12 atomic % of the total content of the rare-earth permanent magnet powder, and the ratio of the content of the element C to the sum of the content of the element Nd and the element A in the rare-earth permanent magnet powder is 0.05 to 0.12.

The invention provides a biphase composite magnetic material design calculation method and device, equipment and a medium, and relates to the technical field of magnetic materials. The method comprises the following steps: respectively carrying out structure optimization on single-phase unit cells of a soft magnetic phase and a hard magnetic phase to obtain a stable single-phase unit cell structure; combining a soft magnetic phase and a hard magnetic phase based on magnetic performance analysis of a single-phase unit cell structure; and in consideration of atomic bonding, lattice mismatch and orbital hybridization, calculation parameters are set to execute atomic relaxation, and the energy-stable combined unit cell model of the biphase composite magnetic material is obtained. On the basis of the density functional theory, the influence of the interfacial effect and different soft and hard magnetic phase thickness ratios on the magnetic performance in the double-phase composite magnetic material is researched, so that the screening and design process of a novel magnetic material meeting specific function requirements can be remarkably accelerated; and a powerful theoretical basis and a material basis are provided for developing next-generation energy-saving and reliable power electronic equipment.

The invention concerns a method for manufacturing a magnet from recycled magnets comprising the following steps of:providing:a 1st powder comprising grains of a magnetic phase TR2Fe14B, metal-based compounds and a grain boundary phase rich in rare earth, said 1st powder being free of heavy rare earth,a 2nd powder obtained from recycled magnets comprising heavy rare earths,the 2nd powder is subjected to a hydrogenation-disproportionation treatment,the 1st powder is mixed with the 2nd powder obtained at the end of step b),the mixture obtained at the end of step c) is subjected to a compacting step so as to obtain a compacted part,the compacted part obtained at the end of step d) is subjected to a sintering step so as to obtain a magnet.

The application discloses a kind of full material state multi-field coupling magnetic phase change regulation and control method and application system, it is related to magnetic phase change technical field, it solves the technical problem that existing technology exists excitation source single and material state range narrow, including the following steps: step 1, based on the determination rule of excitation source, at least one of magnetic field, electric field, temperature field, stress field is selected to constitute the excitation source, and the interaction of the excitation source and the electron spin or magnetic moment of substance occurs and changes system free energy;Established the unified regulation and control method covering multiple excitation sources, multiple material states, solved the technical problems that existing technology excitation source is single, material state range is narrow;Provide specific material system and implementation mode, cover solid alloy, liquid magnetorheological fluid, soft matter hydrogel, high-entropy alloy and multiple material states;Application system integrates memory energy storage and trace displacement driving dual function, can be applied to new energy storage, micro-nano precision manufacturing, aerospace, biological medical treatment and other fields.

The invention provides a composite material and a preparation method thereof, and belongs to the technical field of permanent magnet powder materials. The composite material comprises an inner core, a barrier layer and a functional layer, the surface of the inner core is coated with the barrier layer, the surface of the barrier layer is coated with the functional layer, the inner core is made of permanent magnet powder, the barrier layer is made of at least one metal oxide, and the functional layer is made of at least one of Cu, CuO, AlF3 and MgF2. The surface of the permanent magnet powder is sequentially coated with the barrier layer and the functional layer, the effects of blocking water and oxygen permeation, promoting the subsequent sintering effect and optimizing grain growth and a grain boundary structure can be achieved on the premise that the chemical integrity of a magnetic phase (a main crystal phase) is not sacrificed, and the water and oxygen resistance, the corrosion resistance, the magnetic performance and the dispersity of the composite material can be improved.

The application discloses an iron-based molecular magnetic storage and memory integrated device and belongs to the technical field of semiconductor storage. The device comprises a substrate layer, an FeB molecular magnetic film, a solid-state read-write control layer and a packaging layer. FeB is a unique magnetic phase (atomic ratio 1:1, no impurity phase), and a doping element is connected with FeB units in a molecular bridge to form a molecular-level continuous structure without grains and photolithography. The molar ratio of Fe / B is 85-97% / 3-15%, and the process parameter range is disclosed. The application discloses discarding charge storage, reading and writing data through FeB molecular magnetic moment flip, adapting to three scenes of HDD, SSD and non-volatile memory, having the advantages of low cost, long service life, no data loss after power failure, photolithography exemption and secret storage of core accurate parameters.

The invention relates to the technical field of electronic devices, in particular to an anti-fatigue multi-iron device based on interlayer slippage and a simulation construction method and application thereof. The anti-fatigue multi-iron device comprises a left electrode area, a right electrode area and a center scattering area connected with electrodes at the two ends; the central scattering region comprises a ferroelectric layer and an antiferromagnetic layer, the ferroelectric layer and the antiferromagnetic layer are stacked through Van der Waals force, the ferroelectric layer is of a multi-layer structure, the ferroelectric layer of the central scattering region generates a switchable planar polarization field through interlayer slippage, the magnetic spin direction of the antiferromagnetic layer is turned over, and the magnetic spin direction of the antiferromagnetic layer is turned over. Switching between different magnetic phase states of the magnetic material is achieved, and meanwhile interface defects and wall pinning effects are not generated. The internal planar polarization field of the sliding ferroelectric material enables different anti-ferromagnetic magnetic phases of the sliding ferroelectric material to be switched back and forth, the tunneling barrier height is changed, the tunneling resistance effect is generated, the four-state or even more-state storage capacity can be achieved through coupling among multiple physical fields, and the storage density and energy efficiency are remarkably improved.

The application discloses a method for preparing soft-hard magnetic nanometer dual-phase particles by a self-propagating combustion method without external ignition, and comprises the following steps: preparation of soft magnetic phase nanoparticles, formation of a hard magnetic phase surface enrichment layer, self-propagating combustion without external ignition, and heat treatment. By moving the shell layer construction to the precursor stage, the application can reduce free nucleation and macroscopic phase separation, improve interface continuity, and provide a more direct process for the regulation of shell thickness and coverage, thereby providing a new technical path for obtaining soft-hard magnetic nanometer dual-phase particles with a soft magnetic core-hard magnetic shell.

The invention discloses a high intrinsic coercive force permanent magnetic ferrite and a preparation method and application thereof, and belongs to the technical field of permanent magnetic ferrites.The cerium and manganese are introduced in a limited range to partially replace lanthanum and cobalt oxides, Ce can form Ce < 4 + > and Ce < 3 + > more easily, charge offset of Fe < 2 + > and Fe < 3 + > can be compensated, meanwhile, Ce can inhibit overgrowth of crystal grains, Mn adjusts magnetic domain distribution, and therefore the permanent magnetic ferrite with the high intrinsic coercive force can be obtained. The sintering temperature is reduced and ferrite compactness is promoted. In the process of preparing the ferrite, the green body is sintered in a staged gradient heating and cooling mode, through cooling sintering after first heating, overgrowth of crystal grains at a high temperature is inhibited, the crystal grains grow to a reasonable size, and the number of crystal boundaries is controlled, so that magnetic domain migration is hindered, and meanwhile, excessive precipitation of a non-magnetic phase at the crystal boundaries is inhibited; the ferrite can be uniformly heated through rapid cooling, and the uniformity of the grain size is ensured.

The invention belongs to the technical field of soft magnetic high-entropy alloy materials and magnetron sputtering, and particularly relates to a nitrogen-doped high-entropy alloy film inductance material and a preparation method thereof.The high-entropy alloy components comprise B and / or Zr, Fe, Co and Ni elements, and the nitrogen-doped high-entropy alloy film inductance material is obtained through a magnetron sputtering method. The method specifically comprises the steps that in the sputtering process of the high-entropy alloy film, nitrogen with certain partial pressure is introduced, and the nitrogen element is deposited into the high-entropy alloy film and forms nitride with a high-entropy alloy element; the high resistivity characteristic of the material is improved, magnetic performance deterioration caused by introduction of a non-magnetic phase is weakened, meanwhile, the material has excellent magnetic performance, the performance of the film is regulated and controlled by controlling nitrogen partial pressure, nitrides of various different structures are formed, the regulation and control mode is more accurate, the nitrogen doping effect is more uniform, cost is reduced, and the preparation method is suitable for industrial production. The method is suitable for large-scale industrial production.

The invention discloses a magnetic pearlife cyclic regeneration method, and belongs to the technical field of industrial solid waste recycling. According to the method, a four-step closed-loop regeneration process of magnetic separation, mild pickling, oxygen-controlled thermal activation and surface repair is constructed for magnetic pearlife in a decommissioning heat insulation layer of a low-temperature storage tank for LNG, liquid hydrogen and the like. High-purity magnetic separation is realized through a pulsed magnetic field (1-3T); dilute acid with the pH value of 3.0-4.0 is adopted for targeted cleaning of the metal hydroxide; performing low-temperature thermal activation at 300-400 DEG C in an inert atmosphere to realize organic matter decomposition and magnetic phase protection; and finally, repairing the surface microcracks by utilizing nano silica sol. According to the method, the defects of high energy consumption, high pollution and magnetic damage of a traditional regeneration technology are overcome, the magnetic response recovery rate of the regenerated pearlife is larger than or equal to 90%, the heat conductivity coefficient is smaller than or equal to 0.035 W.m <-1 >. K <-1 >, the regenerated pearlife can be directly reused in a low-temperature heat insulation layer, zero solid waste output is achieved in the whole process, and remarkable economic and environmental benefits are achieved.

Disclosed herein are magnetocaloric materials comprising alloys useful for magnetic refrigeration applications. The disclosed alloys include Dysprosium, Erbium, Holmium, Yttrium, or Terbium, and Cerium, Neodymium, and / or Gadolinium components that are fairly inexpensive. In certain embodiments, the materials exhibit second-order magnetic phase transitions near their Curie temperatures with negligible thermal and structural hysteresis losses, making them attractive for magnetic refrigeration. Surprisingly, the performance of the disclosed materials is comparable to or better than that of other expensive, rare-earth-based magnetocaloric materials.

The application provides a high-temperature tempering method for improving strong magnetic phase of steel slag, and relates to the technical field of steel slag resource utilization. The method is suitable for fresh molten steel slag or steel slag powder generated in a steelmaking workshop. The steel slag is placed in an environment with a temperature of 1000-1300 DEG C, 6%-14% of the mass of the steel slag is added with graphite or coke, and the mixture is stirred uniformly and kept for 10-90 min, and then the mixture is cooled. The operation can convert the weakly magnetic RO phase component and calcium ferrite component in the steel slag into strong magnetic phase such as metallic iron or magnetite, thereby improving the magnetism of the iron component in the steel slag, and further improving the subsequent magnetic separation effect, helping the iron recovery of the steel slag; and the steel slag with high activity and mainly composed of calcium silicate phase is obtained, which lays a foundation for the subsequent application of the steel slag in preparing low-carbon cementitious materials and the like. The method is simple and easy to operate, low in cost and energy consumption, and high in efficiency, and is beneficial to large-scale industrial production and popularization.

This invention relates to the field of anti-icing technology for power transmission lines, and discloses a rare-earth alloy magnetic material, its preparation method, an anti-icing device, and a power transmission line. The general chemical formula of the rare-earth alloy magnetic material is TM. a RE b Si c B d The material contains one or more of Fe, Ni, Cr, Co, and Mn, and one or more of Pr, La, Nd, and Ce. Through the synergistic ratio of transition metals and rare earth elements, combined with lattice modulation of Si and B elements, the Curie temperature of the material can be adjusted within the range of 20℃ to 40℃. The preparation method includes precise raw material formulation, melting and molding under a vacuum inert atmosphere, and staged high-temperature long-term heat treatment to promote the stable formation of the low Curie temperature magnetic phase and suppress the precipitation of impurity phases. The resulting magnetic material can adaptively generate heat with temperature changes in low-temperature, icing-prone environments, making it suitable for devices such as pre-twisted wires, sleeves, and snow-blocking rings for anti-icing purposes in transmission lines. It has the advantages of low energy consumption, high reliability, and strong engineering adaptability.

The application provides a self-supporting magnetic phase change material manganese arsenic film and a preparation method and application thereof, and relates to the technical field of magnetic functional materials. The self-supporting magnetic phase change material manganese arsenic film is a manganese arsenic film with a polycrystalline structure. The preparation method comprises the following steps: depositing a water-soluble sacrificial layer on the surface of a magnesium oxide single crystal substrate by a pulsed laser deposition method; depositing a manganese arsenic film with a polycrystalline structure on the surface of the sacrificial layer by a magnetron sputtering method; dissolving the water-soluble sacrificial layer to make the manganese arsenic film peel off to form a self-supporting film, and then transferring the self-supporting film to the surface of a new magnesium oxide single crystal substrate to obtain the transferred self-supporting magnetic phase change material manganese arsenic film. The application solves the problem that phase transition temperature drift or magnetic performance attenuation easily occurs in the film peeling and transferring process, and realizes controllable peeling and transferring of a large-area and high-quality film under the premise of ensuring the stoichiometric ratio stability and the integrity of the crystal structure.

This invention provides a sputtering target for forming a buffer layer that suppresses the in-plane orientation of magnetic particles in a magnetic thin film made of FePt alloy or the like for a magnetic recording medium, while also miniaturizing the magnetic particles. [Solution] The present invention relates to a sputtering target for a magnetic recording medium for forming a buffer layer between a substrate film and a magnetic thin film when forming a magnetic thin film on a substrate film. The buffer layer forming target according to the present invention consists of a magnetic phase made of an FePt-based alloy composed of Fe and Pt and element M, and a non-magnetic phase made of at least one of C, carbide, and nitride. The element M of the FePt-based alloy constituting the magnetic phase is at least one of Cu, Si, Ti, Cr, B, V, Nb, Ta, Ru, Mn, Zn, Mo, W, Au, Ag, and Ge. Preferably, the magnetic phase is made of an FePt-based alloy consisting of 20 mol% to 95 mol% of element M and the remainder being Fe and Pt.

The invention discloses a preparation method of core-shell structure soft and hard magnetic nano double-phase particles with controllable shell thickness. The preparation method comprises the following steps: preparing soft magnetic phase nano particles; preparing a precursor solution containing soft magnetic phase nanoparticles; and carrying out spray pyrolysis on the precursor solution to obtain the soft and hard magnetic nano double-phase particles with a one-shell multi-core structure. The one-shell multi-core soft and hard magnetic nano double-phase particles with double controllable core layers and shell layers are obtained through a spray pyrolysis method, the thickness and components of the shell layers can be accurately regulated and controlled at the nanoscale, good soft and hard magnetic matching and exchange coupling performance is achieved, a new way is provided for structure regulation and control and performance optimization of a high-performance soft and hard magnetic composite material, and the method is suitable for large-scale popularization and application. And the complex sol-gel coating or acid pickling step is not needed, the technological process is simplified, and the applicability is high.

The invention discloses a magnetic domain wall width quantitative measurement method based on transmission electron microscope electron holography, and the method comprises the steps: observing a sample in a transmission electron microscope, obtaining an electron hologram containing a magnetic domain wall region, the electron hologram at least comprising an object hologram and a reference hologram; importing the object hologram and the reference hologram into an image processing program, and performing phase reconstruction to obtain a phase diagram of the sample; performing phase gradient calculation on the phase diagram to obtain a phase gradient diagram, selecting a region of interest containing a magnetic domain wall in the phase gradient diagram, extracting a one-dimensional gradient profile, and fitting the one-dimensional gradient profile by adopting a hyperbolic tangent function to obtain characteristic parameters of the magnetic domain wall; and calculating the width of the magnetic domain wall according to the feature parameters obtained by fitting, and outputting a width result of the magnetic domain wall and a fitting curve image. According to the method, the magnetic phase information is directly reconstructed based on the electronic holography, higher spatial resolution and phase sensitivity are achieved, and the measurement error of the magnetic domain wall width is remarkably reduced.

This invention discloses a method for extracting vanadium and silver from silver-vanadium ore through reduction roasting combined with gravity and magnetic separation, belonging to the field of vanadium-silver extraction and separation technology. The method involves crushing the raw silver-vanadium ore, adding reagents including an iron source, a lead source, a reducing agent, and a binder, and then granulating it to obtain pellets. The pellets are then reduced-roasted and cooled to obtain a mixed sintered clinker. This mixed sintered clinker has a layered structure, with a lower layer of lead-silver alloy and an upper layer of a mixture of vanadium-iron spinel and silicate slag. The mixed sintered clinker is crushed and gravity-separated to recover the lower layer of lead-silver alloy. The upper layer of vanadium-iron spinel and silicate slag mixture is ground to a particle size of less than 74 μm (80-90%) and then magnetically separated to obtain vanadium-iron spinel concentrate and non-magnetic tailings. This method, by introducing iron and lead ingredients into the pellets for synergistic reduction roasting, simultaneously achieves the formation of the magnetic phase of vanadium and the liquid transformation of silver. The entire process involves no cyanide introduction and no acid or alkaline wastewater discharge, enabling efficient separation and recovery of silver and vanadium.

The invention discloses a rotor structure of a biphase magnetic material embedded motor, a preparation method and an assembly method, and belongs to the field of motor design. The rotor structure comprises a magnetic conductive block, a magnetic barrier structure and a sleeve structure, the magnetic conductive block is of a segmented structure; the sleeve structure is made of a biphase magnetic material, comprises an outer sheath arranged on the outer side of the rotor and an embedded support body embedded into a rotor pole center shaft, and is connected with the outer sheath; the sleeve structure is T-shaped under the single pole; the contact area of the sleeve structure and the magnetic barrier structure is set as a non-magnetic phase, and the rest area is set as a magnetic phase. The problem of mutual restriction of high strength and low flux leakage requirements in motor rotor design is solved, the peak rotating speed and torque output capability of the motor are improved, and the power density of the motor is improved.

The application belongs to the technical field of magnetic phase change materials, and particularly relates to a method for improving the physical performance of a Bi-rich phase Mn2Sb-based alloy material, which comprises the following steps: mixing a parent phase alloy with a diffusion source, sintering, and diffusing the diffusion source into the parent phase alloy to obtain a Bi-rich phase Mn2Sb-based alloy material; the diffusion source accounts for 2.9% to 30% of the total mass of the parent phase alloy and the diffusion source; the diffusion source is Dy 100‑y Cu y , 5<=y<=40 or Pr 100‑z Ga z , 5<=z<=40; the parent phase alloy is (Mn2Sb) 1‑x Bi x , 0 The application diffuses rare earth alloy to the grain boundary phase of the Bi-rich phase Mn2Sb-based alloy to optimize the magnetic performance of the material, so that the material can be widely applied to magnetic memories, magnetic drivers, magnetic sensors, thermomagnetic electric conversion devices, solid-state refrigeration devices and the like.

The application discloses a method for analyzing phases of iron in ores, and belongs to the technical field of mineral analysis. The method comprises the following steps: after magnetic separation of an ore sample, performing iron valence state analysis on a magnetic product, and distinguishing a magnetic iron phase, a pseudo hematite phase and a magnetic intergrowth phase based on the deviation degree of the ratio of divalent iron to trivalent iron from the theoretical ratio of magnetite; sequentially performing iron carbonate phase selective leaching-oxidation post-treatment, hematite-limonite phase reduction-inhibition synergistic selective dissolution, iron sulfide phase liquid phase complexation-solid phase charring step-by-step extraction and iron silicate phase alkali fusion digestion on a non-magnetic product; and finally, performing plasma atomic emission spectrometry on each phase to-be-measured solution and total iron digestion liquid, and calculating the iron content of each phase. The application solves the key problems in traditional iron phase analysis, such as incomplete classification of magnetic iron, poor selectivity of non-magnetic phase and insufficient wide use.

The application discloses a preparation method of a high-performance diffusion Sm-Co composite permanent magnet, and comprises the following steps: mixing alloy components according to (Sm, Re)2(Co, A) 17 After the alloy components are mixed, a proper amount of BiI3 is added, magnetic field orientation forming is carried out, and a Sm-Co magnet green body is obtained; the Sm-Co magnet green body is vacuum pre-fired under certain temperature conditions, and a magnet with a network channel structure in the interior is formed; a soft magnetic phase nano-level Fe or Co powder is mixed with an organic solvent to form a diffusion source mixed solution, the pre-fired Sm-Co magnet is immersed into the mixed solution, and after being taken out, the Sm-Co magnet is placed into a vacuum oven and dried. The BiI3 sublimation technology is used to make the soft magnetic phase and the doped elements effectively enter the grain boundary of the Sm-Co magnet, improve the coupling effect and pinning effect of the soft and hard magnetic phases, and improve the coercive force and maximum magnetic energy product. The preparation method is simple in process, low in cost, less in introduced impurities, and capable of maintaining the magnetic performance of the hard magnetic phase to the maximum extent.

A laminated coil component comprises a laminated body formed by stacking multiple insulating layers in a stacking direction and having a coil disposed therein, and external electrodes disposed on the surface of the laminated body and electrically connected to the coil. The laminated body has a first end face and a second end face opposite each other in the length direction, a first main face and a second main face opposite each other in the height direction orthogonal to the length direction, and a first side face and a second side face opposite each other in the width direction orthogonal to the length and height directions. The external electrodes include a first external electrode extending from at least a portion of the first end face of the laminated body to a portion of the first main face, and an external electrode extending from at least a portion of the second end face of the laminated body. The second external electrode extends to a portion of the first main surface, the stacking direction of the laminate and the coil axis of the coil are parallel to the first main surface, the insulating layer has a magnetic phase comprising at least Fe, Ni, Zn and Cu spinel structure and a non-magnetic phase comprising at least Si, if the grain size D50 and D90 of the grain constituting the magnetic phase are set as the cumulative area equivalent circle diameters of 50% and 90% respectively in the cumulative distribution of the area equivalent circle diameter of the grains according to the number basis, then the grain size D50 is 50 nm or more and 750 nm or less, and the grain size D90 is 200 nm or more and 1500 nm or less.

The invention discloses a traditional Chinese medicine external application patch with directional drug penetration and thermal magnetic therapy functions, and relates to the technical field of transdermal delivery, the patch comprises a patch body, the patch body is at least provided with a magnetic-thermal synergistic functional layer, the patch body can further comprise a drug storage layer and an isolation liner, the magnetic-thermal synergistic functional layer is a magnetic induced phase change gel layer, and the isolation liner is arranged on the magnetic-thermal synergistic functional layer. The magnetic phase change patch is composed of a gel matrix and a uniformly dispersed magnetic phase change composite unit, the magnetic phase change composite unit comprises a phase change material and magnetic nanoparticles, when the magnetic phase change patch is used, the patch is applied to an area to be treated, an external alternating magnetic field is applied, and the magnetic nanoparticles generate a magnetocaloric effect; the phase-change material maintains the magnetic-thermal synergistic function layer to be close to a specific temperature through the phase-change process, the medicine storage layer carries traditional Chinese medicine active ingredients, directional medicine penetration is achieved under the thermomagnetic synergistic effect, a complex circuit and a wired power source are not needed, the continuous and stable thermomagnetic synergistic effect is achieved, the treatment effect and the medication safety are improved, and the application range is wide. The method is suitable for clinical directional drug penetration treatment scenes.