60 results about "Ferrite powder" patented technology

The application belongs to the technical field of magnetic material preparation, and particularly relates to a production process of high-performance rare earth permanent ferrite magnetic powder. The process comprises the following steps: preparing iron red and auxiliary materials, wherein the auxiliary materials comprise calcium carbonate, strontium carbonate, lanthanum oxide and cobalt oxide; mixing raw materials in proportion, then performing dry ball milling to obtain mixed materials; performing steam treatment on the obtained mixed materials to make the water content of the mixed materials reach 2-5%, then performing ripening, and the ripening time is at least 30 min, and the ripening process is completed in the screw conveyor; balling; pre-sintering; performing coarse crushing on the pre-sintered materials and sieving to obtain rare earth permanent ferrite magnetic powder. Through steam pretreatment and ripening, the strength and thermal stability of the ball materials are significantly improved, the ball materials remain complete in the kiln, the flowability is good, and the consistency and qualified rate of the product are improved.

The present invention generally relates to a method for synthesizing dysprosium-doped copper-zinc ferrite nanomaterials with enhanced structural and functional properties. The method comprises dissolving stoichiometric quantities of copper nitrate trihydrate, zinc nitrate hexahydrate, iron nitrate nonahydrate, and dysprosium nitrate hexahydrate in distilled water to prepare an oxidizer solution. A fuel mixture is separately prepared using urea and glucose in equal proportions by weight. The oxidizer and fuel mixtures are combined in 1:1 ratio, calculated based on their respective oxidizing and reducing valencies, to form a homogeneous precursor solution. This solution is stirred thoroughly for about one hour and subsequently transferred to a Pyrex dish. The dish is placed in a muffle furnace preheated to approximately 450° C., where the solution undergoes a self-sustained combustion reaction, yielding a fine, porous Cu0.5Zn0.5DyxFe2-xO4 ferrite powder within 20 minutes. The resultant powder is ground to achieve uniform particle distribution suitable for advanced applications.

The invention discloses a preparation method and application of ferrite-based micron-sized flaky microwave absorbent powder, and relates to the technical field of microwave absorbing materials.The preparation method comprises the following steps that S1, ferrite precursor tape casting slurry A is pretreated, and slurry B is obtained; s2, the slurry B is poured into a casting machine for casting, and a casting green tape C is obtained at an outlet of the casting machine; s3, stripping and removing the PET substrate on the tape casting green tape C to obtain a ferrite green tape sheet D; s4, sintering the ferrite green tape sheet D in sintering equipment, and cooling to room temperature to obtain a ferrite sheet E; and step S5, crushing the ferrite sheet E, and performing classified screening treatment to obtain the flaky ferrite absorbent powder. According to the invention, the design is reasonable, the flaky ferrite powder is used as the magnetic absorbent, compared with the traditional flaky carbonyl iron, the ferrite material has obvious lightweight and anticorrosion advantages, the labyrinth effect formed by the flaky structure can further improve the anticorrosion performance of the product, and impedance mismatching caused by eddy current loss is avoided.

The present invention developed a composite having a novel structure containing, in a high content, a powder having a radiation-shielding function.　Provided is a composite having a radiation-shielding function and a method for producing the same. The composite comprises a preform made from a mixture containing a liquid silica-based binder and one or more radiation-shielding powders selected from gadolinium oxide, boron carbide, boron oxide, boron, barium sulfate, strontium oxide, tungsten, tungsten oxide, tungsten carbide, molybdenum, molybdenum oxide, iron powder, iron oxide powder, and ferrite powder, the radiation-shielding powder(s) being contained in the range from 3% to 85% in total. All of the voids in the preform are impregnated and filled with molten aluminum and solidification is allowed to occur to form a composite, or 25% or more of the voids in the preform are impregnated with a liquid organic / inorganic sealing agent and solidification is allowed to occur to form a composite. The liquid silica-based binder has properties that allow the preform to be formed at a temperature at which the radiation-shielding powder(s) does not decompose.

A multi-pump servo motor driving module for a ferrite powder press comprises a main driver, a first slave driver and a second slave driver, a power supply port of the main driver is connected with a main servo motor, power supply ports of the first slave driver and the second slave driver are respectively connected with a first slave servo motor and a second slave servo motor, and the first slave driver and the second slave driver are respectively connected with the main driver and the second slave driver. The ferrite powder pressing machine has the beneficial effects that firstly, the ferrite powder pressing machine realizes multi-pump linkage operation, part of procedures can be overlapped and carried out at the same time, the waiting time between the forming procedures is reduced, and the forming period is greatly shortened; secondly, the servo motor pump is used for closed-loop control, oil can be reasonably supplied to different hydraulic pumps according to the requirements of all working procedures, and different moments, angles and speeds needed by different working procedures are matched;

The invention discloses a snow melting process based on electromagnetic induction heating of a turnout, which comprises electromagnetic induction coils attached to the waist of a turnout steel rail and the side face of a turnout sliding plate, and electronic paste containing graphene, silver, copper, nickel and ruthenium series resistance paste and a dopant prepared by compounding spinel cordierite and ferrite is burnt and injected to the outer sides of the coils. Alternating current is applied to the coil to generate a magnetic field, the inner side magnetic flux enables the steel rail to generate eddy current heating, the outer side magnetic flux enables slurry carriers to migrate to generate Joule heat, and a synergistic heating infrared radiation system is formed. The method has the beneficial effects that ice and snow on the surface of a turnout steel rail, a rail gap and a sliding plate area are synchronously melted, the technology utilizes the infrared radiation characteristics of graphene, spinel cordierite and ferrite powder, original vacant magnetic flux is utilized, the magnetic flux utilization rate is increased, power consumption is reduced, and the snow melting efficiency and reliability are improved.

The invention relates to a preparation method of a YIG-M type barium ferrite mixed material for a microstrip line circulator. The preparation method comprises the following steps: firstly, preparing YIG precursor powder and barium ferrite powder; pressing the YIG precursor powder into a green body, and sintering to obtain phase-formed YIG ferrite; and crushing the YIG ferrite, mixing the crushed YIG ferrite with the barium ferrite precursor powder according to a mass ratio of 1: 2-2: 1, pressing the mixture into a green body, and carrying out sintering phase formation to obtain the YIG-M type barium ferrite mixed material. The external bias magnetic field of the prepared mixed material is far smaller than that of a traditional YIG material, a good circulation effect can be achieved only through a smaller permanent magnet, and a circulator can be further miniaturized and integrated.

The invention relates to the technical field of transformer manufacturing, in particular to a laminated transformer preparation method and a laminated transformer. The preparation method of the laminated transformer comprises the following steps: respectively preparing ferrite powder and microcrystalline glass ceramic powder into a first green tape and a second green tape by adopting a tape casting process; forming through holes in the first green tape and the second green tape, and filling the through holes with conductive paste; a primary coil layer and a secondary coil layer are printed on the first hole filling green ceramic tape; laminating a plurality of coil hole-filling green ceramic tapes and a plurality of second hole-filling green ceramic tapes according to a preset sequence to form an intermediate electrode layer; laminating a plurality of first green tapes to form a cover layer; stacking the two cap layers and the intermediate electrode layer together to form a block; and sintering the laminated monomers to obtain the laminated transformer. The problems of interface stress concentration and structure cracking caused by difference of thermal expansion coefficients of different materials are effectively solved, and the product yield and reliability are remarkably improved.

Provided are: a ferrite powder whereby, when the ferrite powder is applied in a composite material, dropping out of ferrite particles is suppressed without moldability and filling ability being compromised; a ferrite resin composite material; and an electromagnetic shielding material, an electronic material, or an electronic component. This ferrite powder includes at least spherical or polyhedral ferrite particles in which a step structure is provided on surfaces thereof, the step structure having a polyhedral outline in the surfaces of the ferrite particles.

The application discloses a preparation method of a magnetic high-entropy alloy composite material, and belongs to the technical field of magnetic material preparation. The saturation magnetization intensity of the magnetic high-entropy alloy composite material can reach 153-172 emu / g, the hardness value can reach 200-233 HV, the tensile strength can reach 600-712 MPa, and the coercive force is less than 200 Oe. The preparation steps comprise the following steps: (1) high-entropy alloy powder preparation; (2) ferrite powder preparation; (3) mixing the powders obtained in the steps (1) and (2) with proper additives; (4) loading into a mold and pressure forming; (5) sintering, and the magnetic high-entropy alloy composite material is obtained. The high-entropy alloy magnetic composite material obtained by reasonably controlling the high-entropy alloy composition, the ferrite composition, the proportion of the two components and the sintering process has excellent mechanical properties and outstanding high-frequency magnetic properties.

To develop a composite of a new constitution containing a powder having a radiation shielding function in a high content.SOLUTION: Molten aluminum is impregnated and filled into all voids of a preform made of a mixture containing one or more kinds of radiation shielding powders selected from gadolinium oxide, boron carbide, boron oxide, boron, barium sulfate, strontium oxide, tungsten, tungsten oxide, tungsten carbide, molybdenum, molybdenum oxide, iron powder, iron oxide powder, and ferrite powder and a liquid silica-based binder, the mixture containing the radiation shielding powders in a range of 3 to 85% in total; In the composite body having the radiation shielding function and the method for manufacturing the same, a liquid organic-inorganic sealing agent is impregnated and solidified to form the composite body, and a liquid silica-based binder has characteristics capable of forming a preform at a temperature at which the radiation shielding powder is not decomposed.SELECTED DRAWING: None

The present invention provides a ferrite powder which contains 0.9% by mass to 2.5% by mass of lithium (Li), 1.0% by mass to 8.0% by mass of manganese (Mn), and 58.0% by mass to 69.5% by mass of iron (Fe), and has a crystal phase belonging to the space group P4132 and a crystal phase belonging to the space group Fd-3m. In the X-ray diffraction profile, the half width of the (311) plane of the crystal phase belonging to the space group Fd-3m is 0.09° to 0.22°, and the volume average particle diameter D50 is not less than 1 μm but less than 20 μm.

The application provides an amorphous magnetic powder core and a preparation method thereof, and the preparation method comprises the following steps: (1) brittle heat treatment is performed on a Fe-based amorphous alloy, the amorphous alloy is broken and then pre-annealing treatment is performed to obtain amorphous powder, and two portions of the amorphous powder are taken and sieved through different sieves to obtain first powder and second powder; (2) the first powder and the second powder are mixed, and then MgO is used to perform magnetron sputtering treatment on the first powder and the second powder to obtain precursor powder; (3) surface modification treatment is performed on nano ferrite powder, the precursor powder and the surface-modified nano ferrite powder are mixed and ground, a binder is added for granulation, and then annealing treatment is performed after compression treatment to obtain the amorphous magnetic powder core. The amorphous powder / MgO / ferrite double-layer core-shell structure amorphous composite material is prepared by using the magnetron sputtering method and the mechanical ball milling method, and the prepared magnetic powder core has high permeability, low power loss and good direct current superposition performance.

The invention discloses a preparation method of a composite wave-absorbing film and the composite wave-absorbing film. The method comprises the following steps: mixing a strontium source, an iron source and fused salt, and grinding to obtain a first mixture; the first mixture is subjected to high-temperature sintering and then crushed, and first powder is obtained; and washing and drying the first powder, and grinding to obtain the strontium ferrite powder. Mixing the first aramid nanofiber aqueous dispersion with the strontium ferrite aqueous dispersion to obtain a first mixed dispersion; and carrying out vacuum filtration on the first mixed dispersion liquid to obtain the first composite film. Mixing the second aramid nanofiber aqueous dispersion liquid with the Ti3C2Tx aqueous dispersion liquid to obtain a second mixed dispersion liquid; and carrying out vacuum filtration treatment on the second mixed dispersion liquid to obtain a second composite film. The first composite film and the second composite film are stacked and then subjected to hot pressing treatment, and the composite wave-absorbing film is obtained. Strontium ferrite and Ti < 3 > C < 2 > T < x > in the composite wave-absorbing film have a synergistic effect, so that the wave-absorbing frequency band is widened, and the wave-absorbing performance of the composite wave-absorbing film is improved.

The application relates to the technical field of permanent ferrite preparation, in particular to a method for preparing strontium ferrite by a multi-field coupling auxiliary molten salt method. First, a chemical coprecipitation method is improved to obtain a mixture containing an excess precipitant, inorganic salt and strontium ferrite precursor; then the mixture is subjected to heat treatment under multi-field coupling; finally, strontium ferrite powder is obtained after washing and drying. The application simplifies the chemical coprecipitation process, avoids Sr loss and realizes in-situ salt formation; a multi-element molten salt system is constructed during heat treatment, and an alkali-containing molten salt system with activation is proposed; in the molten salt liquid phase environment, multi-physical fields such as magnetic fields and ultrasonic vibration force fields are cooperated to control the orientation and growth of grains, new driving force and fast channels are provided for ion diffusion, and the rapid synthesis of strontium ferrite and the control of microstructure and size are realized in a low temperature and short time.

The application discloses a high-entropy oxide loaded lanthanum ferrite gas-sensitive material and a preparation method and application thereof, and comprises the following steps: preparing lanthanum ferrite powder; dispersing the lanthanum ferrite powder in water, adding citric acid, and then performing ultrasonic treatment under ice water bath conditions to obtain a surface-modified base suspension liquid; under ice water bath and stirring conditions, dropping a high-entropy complex mother liquor into the base suspension liquid, then adding urea, and performing hydrothermal reaction to obtain a precipitate; washing and drying the precipitate, and then performing stepwise temperature increasing calcination in air. The sensor prepared from the gas-sensitive material has a low baseline resistance of 11 MΩ at an optimal working temperature of 180 DEG C, a response degree of 45.24 to 50 ppm of acetone, and an optimal working temperature which is reduced by 75 DEG C than that of a pure LaFeO3 sensor; the response and recovery times are shortened to 23.38 seconds and 8 seconds respectively, and the sensor exhibits excellent kinetic characteristics.

The utility model discloses a mixing device for soft magnetic ferrite powder, which is applied to the technical field of electronic material processing, and ensures that the powder can be fully rolled, collided and mixed in a cavity through periodic back-and-forth reciprocating swing of a processing bin in the process of stirring and mixing the powder in the mixing processing bin. Lubricating agent accumulation caused by gravity or centrifugal force difference in a specific area is avoided, and mixing blind areas at the two ends or the edge of the cylinder in traditional one-way rotation are eliminated; in the rotating direction switching process, the mixing effect among powder particles is enhanced, meanwhile, a lubricating agent is more uniformly dispersed into powder gaps in the bidirectional flowing process, the mixing efficiency and the material performance consistency are improved, and the local agglomeration or layering phenomenon is reduced.

The invention belongs to the technical field of educational toys, and relates to an anti-scattering magnetic adsorption jigsaw system. The system comprises a jigsaw picture, a flexible magnetic jigsaw plate and a magnetic jigsaw storage disc, ndFeB miniature permanent magnets are embedded in the back face of a base body of the The flexible magnetic jigsaw puzzle is prepared by mixing ferrite powder and flexible high polymer materials such as PVC or rubber, and can be curled and stored; a ferrite layer is embedded in the magnetic jigsaw storage disc, and an anti-slip high edge is arranged on the edge. And the jigsaw pieces are respectively in magnetic adsorption fit with the flexible magnetic jigsaw plates and the magnetic jigsaw storage disc through the permanent magnets on the back surfaces. According to the jigsaw puzzle, the risk that the jigsaw puzzles are scattered due to inclination or shaking can be effectively reduced in the jigsaw puzzle process, multiple jigsaw puzzle postures are supported, the jigsaw puzzles can be conveniently classified and stored, the whole jigsaw puzzle can be attracted to ferromagnetic metal surfaces such as a refrigerator door or a magnetic white board or a metal wall face after jigsaw puzzle is completed, and mounting-free display is achieved.

The invention discloses a ferrite phase shifter preparation method based on a ceramic 3D printing technology, and relates to the technical field of microwave devices, and the ferrite phase shifter preparation method comprises the following steps: mixing obtained pre-synthesized ferrite powder and photosensitive resin according to a certain proportion to form ceramic slurry; printing by using a 3D printer to obtain a phase shifter blank; uncured slurry left on the surface of the green body is removed, and the residual part is completely cross-linked and cured through an ultraviolet post-curing box; putting the post-cured green body into a vacuum degreasing furnace, and removing organic components in the green body; under the protection of a specific atmosphere, the ferrite blank is fully densified. According to the method, high freedom and optimal design of a geometric structure, light weight and topological optimization of the structure can be achieved, traditional manufacturing bottlenecks are broken through, the manufacturing efficiency can be improved, the production cost of complex components is reduced, and the method is particularly suitable for manufacturing ferrite elements with special shapes or microminiaturization and has wide application prospects. And a feasible manufacturing scheme is provided for a next-generation miniaturized and high-performance microwave module.

This invention relates to a method for preparing high-performance manganese-zinc ferrite powder, comprising: (1) mixing the main raw material, defoamer, deionized water and auxiliary raw material evenly, and then ball milling once to obtain a slurry; wherein the main raw material includes pre-calcined manganese-zinc ferrite powder; (2) adding a binder and a dispersant to the slurry, and ball milling a second time to obtain a uniform slurry; (3) conveying the uniform slurry to a spray drying tower for spray granulation to obtain the high-performance manganese-zinc ferrite powder. The high-performance manganese-zinc ferrite powder obtained by this invention has the advantages of uniform particle size, high sphericity, high fluidity and high compaction density, and the process has high consistency and stability and good reproducibility between different batches.

The invention provides anti-radiation concrete based on iron tailing waste and a preparation method thereof, and relates to the technical field of concrete preparation, the anti-radiation concrete is prepared from the following raw materials by weight: 200-240 parts of P.O42.5 cement, 100-130 parts of grade I fly ash, 90-100 parts of grade S95 mineral powder, 2000-2350 parts of composite aggregate, 150-165 parts of water, 10.5-12 parts of a water reducer and 1-3 parts of boron carbide powder, the composite aggregate comprises coarse aggregate and fine aggregate, and the fine aggregate is modified iron tailings and is prepared by ball-milling and coating iron tailings and barium ferrite powder. The anti-radiation concrete has the beneficial effects that the anti-radiation concrete is produced by using the tailing waste, solid waste is comprehensively utilized, and environmental pollution is reduced.

The present invention provides a silicone heat-shrinkable tube that has the ability to be colored to a predetermined color and has good flame retardancy. [Solution] (A) A linear organopolysiloxane having two or more alkenyl groups bonded to silicon atoms in one molecule, with an average degree of polymerization of 3000 to 50000, where 50 mol% or more of the total substituents are methyl groups, and 0.05 to 5.0 mol% are alkenyl groups: 100 parts by mass, (B) A BET specific surface area of ​​100 m 2 A silicone heat-shrinkable tube characterized by being obtained by heat curing a silicone rubber composition containing (C) fine powder silica with a weight of 1 / g or more: 5 to 60 parts by mass, (D) at least one or more inorganic pigments selected from metals, metal oxides, metal hydroxides, metal nitrides, metal carbides and ferrite powders: 0.2 to 100 parts by mass, (E) a curing agent: effective amount, and (F) a dispersant for fillers: 3 to 100 parts by mass.

The utility model discloses a waste heat recovery pipeline of a rotary kiln for ferrotitanium powder reduction, relates to the technical field of waste heat recovery pipelines, and aims to solve the technical problems that heat loss is easily caused and the waste heat recovery efficiency is reduced due to insufficient circulation speed of flue gas in the pipeline and the material of the pipeline at present. Comprising a waste heat recovery pipe body and sealing connection mechanisms arranged at the two ends of the waste heat recovery pipe body, the waste heat recovery pipe body comprises a plurality of variable-diameter reducing pipe sections and a plurality of variable-diameter increasing pipe sections, a flow guide plate is arranged in the waste heat recovery pipe body, and each sealing connection mechanism comprises flange plates arranged at the two ends of the waste heat recovery pipe body. And a sealing gasket is arranged at the front end of the flange plate. The rotary kiln waste heat recovery device has the advantages that the flow speed of high-temperature flue gas can be increased, the heat insulation performance and the sealing performance of the pipeline are improved, heat is effectively prevented from losing in the pipeline, the waste heat recovery efficiency can be effectively improved, and the requirement for waste heat recovery of a rotary kiln for ferrotitanium powder reduction can be better met.

This invention relates to a permanent magnet ferrite powder, its preparation method, and its application. The method includes the following steps: mixing an iron source with strontium carbonate raw material, followed by mixing, pre-calcination, and crushing to obtain the permanent magnet ferrite powder; the strontium carbonate raw material meets the following characteristics: a SrCO3 mass percentage of 95.0-97.5%; a SiO2 mass percentage of 0.5-2.5%; an average particle size of 3-8 μm; and the strontium carbonate particles have a spindle-shaped, olive-shaped, or spherical macroscopic morphology, with the ratio c / a of the particle's axial length c to its diagonal spacing a being less than 3. This method uses specific coarse-grained strontium carbonate raw material with high silica content, solving the technical problems of uneven raw material mixing and abnormal grain growth during sintering.

The application relates to the material field and discloses an impregnation liquid and application thereof, a preparation method of a magnetic powder core and application thereof. The impregnation liquid comprises ferrite powder, epoxy resin, a curing agent, a dispersing agent and a diluent; the average particle size of the ferrite powder is 10-80 nm; the content of the ferrite powder is 5-50 wt% based on the total weight of the impregnation liquid, the content of the epoxy resin is 33-62.7 wt%, the content of the curing agent is 8-15.2 wt%, the content of the dispersing agent is 1-1.9 wt%, and the content of the diluent is 8-15.2 wt%. The prepared impregnation liquid is applied in the preparation of a magnetic powder core and / or a magnetic device. The preparation method of the magnetic powder core comprises the following steps: after the magnetic powder core is soaked in the impregnation liquid, solidification treatment is carried out. The prepared magnetic powder core is applied in an inductor and / or a transformer. The impregnation liquid provided by the application can improve the strength and magnetic permeability of the magnetic powder core.

This invention discloses a ferrite magnetic powder material and its preparation method that induces oriented alignment through wet ball milling, belonging to the field of new materials technology. The method addresses the problem that traditional wet ball milling cannot induce preferred grain alignment due to the isotropic nature of mechanical action. A coarse ferrite powder slurry is injected into a dedicated ball milling device. During the milling process, a rotating magnetic field is simultaneously applied and the grinding chamber is rotated to form a directional fluid shear field. A closed-loop control system maintains a fixed phase difference between the rotating magnetic field vector and the local fluid velocity vector, achieving spatiotemporal synchronization. Simultaneously, the slurry rheological properties, medium filling rate, and process parameters are precisely controlled. This magnetic powder exhibits significantly enhanced response capabilities in subsequent magnetic field orientation pressing, effectively improving the remanence of the final sintered magnet and reducing coercivity fluctuations, with excellent batch-to-batch consistency in magnetic properties.

The present application belongs to the field of magnetic materials. The present application provides a permanent magnet ferrite material and its preparation method and use. The preparation method adds a small amount of ferrite powder as a crystallization seed to the permanent magnet ferrite raw material, thereby accelerating the solid phase reaction, reducing the pre-sintering temperature, preparing a high-performance permanent magnet ferrite material without the addition of lanthanum cobalt; the ferrite crystalline particles in the obtained permanent magnet ferrite material are more uniform, and the generation of coarse crystalline particles is effectively avoided, and the comprehensive magnetic performance is obviously better than that of the same kind of material prepared by the traditional process.

The invention discloses an MOF derivative ferrite composite coating as well as a preparation method and application thereof, and the composite coating is low in density, can adjust the absorption strength and absorption frequency band width of a shielding material in a relatively large range, improves the effective absorption of the composite material in a low-frequency band, and improves the shielding performance of the material. The preparation method has a wide application prospect in the fields of electronics, communication, household appliances, chemical industry, military industry and the like, and is characterized by comprising the following steps: 1, preparing ferrite powder; step 2, loading the ferrite powder by using a metal organic framework (MOF); step 3, preparing an MOF derivative ferrite composite material; and step 4, mixing the MOF derivative ferrite composite material with epoxy resin to obtain the MOF derivative ferrite composite coating.

The utility model discloses a purification device for soft magnetic ferrite particles, which comprises a processing box, a longitudinally arranged screening cabin is arranged in the processing box, a magnetic separation plate is arranged on one side of the screening cabin, an air blowing plate opposite to the magnetic separation plate is arranged on the other side of the screening cabin, and a spiral pusher is further arranged at the top of the outer side of the processing box. A feeding port corresponding to the output end of the spiral pusher is formed in the top of the screening bin, a waste collecting box is arranged at the bottom of the screening bin, materials are evenly conveyed to the screening bin through the spiral pusher, meanwhile, a longitudinal airflow wall formed by the air blowing plates can blow away and transversely push material particles falling from top to bottom, and therefore the screening effect is improved. Powder particles and the magnetic separation plate are in full contact and flow close to each other, so that ferrite particles in the materials are effectively adsorbed, and non-metal impurities naturally fall into a waste collection box at the bottom of the screening cabin; the purifying device can continuously screen and purify ferrite powder particles, and long-time preparation is not needed.