69results about How to "Improve electromagnetic performance" patented technology

The invention discloses non-oriented silicon steel for a motor iron core of an air conditioner compressor and a preparation method of the non-oriented silicon steel. The preparation method comprises the following steps: smelting: molten steel comprises the following chemical components in percentage by weight: 0.75-1.35% of Si, 0.23-0.28% of Al, 0.18-0.45% of Mn, 0.0015-0.0035% of rare earth La, less than or equal to 0.0025% of C, less than or equal to 0.003% of S and the balance of Fe and impurities; continuous casting: controlling the isometric crystal proportion of a continuous casting blank to be greater than or equal to 55%; during hot rolling and heating, the soaking temperature ranges from 1130 DEG C to 1140 DEG C, the heating time ranges from 150 min to 200 min, the outlet temperature of rough rolling is controlled to range from 930 DEG C to 940 DEG C, the final rolling temperature ranges from 835 DEG C to 875 DEG C, and the coiling temperature ranges from 650 DEG C to 680 DEG C; cold continuous rolling; annealing is conducted, the annealing temperature ranges from 880 DEG C to 930 DEG C, and the plate passing speed ranges from 150 m / min to 165 m / min; and cooling, coating and finishing.

The invention discloses a rotor skewed pole mode method for reducing noise of a permanent magnet synchronous motor, which analyzes and designs a generation source of radial vibration of the integer slot permanent magnet synchronous motor, and mainly solves the problem of high-frequency squeal generated by the integer slot permanent magnet synchronous motor at a high speed. The rotor specifically comprises a rotor iron core and a deviation angle segmented skewed pole of a permanent magnet. The method is applied to the built-in permanent magnet synchronous motor, and a permanent magnet and a rotor core of the built-in permanent magnet synchronous motor are segmented. When the permanent magnet motor adopts the rotor segmented structure, a radial force harmonic component which plays a main role in vibration of the motor can be effectively offset, radial vibration caused by specific radial force harmonic waves is weakened, and torque pulsation of the motor is optimized, so that the running stability of the motor is improved, and the whole quietness of the motor is improved.

The invention relates to the technical field of stator core production, in particular to a brushless motor stator core full-automatic production line which comprises a first punching mechanism, a second punching mechanism, a first feeding mechanism, a second feeding mechanism, a lamination conveying mechanism, an assembling jig, a welding mechanism and a discharging mechanism. The first punching mechanism is used for punching a first stator iron sheet, the second punching mechanism is used for punching a second stator iron sheet, the first feeding mechanism is used for grabbing a first stator iron sheet punched by the first punching mechanism and placing the first stator iron sheet on the assembling jig to be assembled into a first stator iron ring, and the second feeding mechanism is used for grabbing the second stator iron sheet punched by the second punching mechanism and placing the second stator iron sheet on the assembling jig to be assembled into a second stator iron ring. And stacking the first stator iron rings placed on the assembling jig to form a second stator iron ring. Through the design of high automation and integration, the production efficiency is remarkably improved, and the product quality is stable and reliable.

The invention relates to the technical field of stator core production, in particular to a motor stator core automatic processing and forming method, which comprises a first punching mechanism, a second punching mechanism, a first feeding mechanism, a second feeding mechanism, a lamination conveying mechanism, an assembling jig, a welding mechanism and a discharging mechanism, the first punching mechanism is used for punching a first stator iron sheet, the second punching mechanism is used for punching a second stator iron sheet, the first feeding mechanism is used for grabbing a first stator iron sheet punched by the first punching mechanism and placing the first stator iron sheet on the assembling jig to be assembled into a first stator iron ring, and the second feeding mechanism is used for grabbing the second stator iron sheet punched by the second punching mechanism and placing the second stator iron sheet on the assembling jig to be assembled into a second stator iron ring. And stacking the first stator iron rings placed on the assembling jig to form a second stator iron ring. By means of a series of automatic and precise processing steps, efficient, precise and stable production of the stator iron core is achieved. According to the method, the production efficiency is improved, the production cost is reduced, and the quality and reliability of products are remarkably improved.

The invention discloses a non-oriented electrical steel plate with excellent blanking processing performance, which contains Fe and inevitable impurities, and also contains the following chemical elements in percentage by mass: 0 < C < = 0.004%, 0.8-2.2% of Si, 0.05-0.5% of Mn, 0.005-0.15% of P, 0 < Al < = 0.1%, 0.0003-0.01% of Ca + Ce, and the balance of Fe and inevitable impurities. Wherein the value of Si / 10 is 0.53%-22%. The invention also discloses a manufacturing method of the non-oriented electrical steel plate. The manufacturing method comprises the following steps: smelting and casting; heating and hot rolling; performing cold rolling after pickling; and continuous annealing: the soaking time is controlled to be 5-60 s, and the soaking temperature T is equal to 850 + 11a * {[Si] / (10 * [P])}. According to the non-oriented electrical steel plate and the manufacturing method thereof, the non-oriented electrical steel plate has a proper iron loss coefficient and excellent electromagnetic performance, and meanwhile, the non-oriented electrical steel plate also has good blanking processing performance.

The present invention relates to scandium-doped nickel-zinc-cobalt ferrite and a preparation method thereof, belonging to the technical field of soft ferrite materials. The scandium-doped nickel-zinc-cobalt ferrite has a molecular formula of: Ni 0.5 Zn 0.4 Co 0.1 Sc x Fe 2‑x O4; wherein 0<x≤0.1. The scandium-doped nickel-zinc-cobalt ferrite prepared by the present invention has higher saturation magnetization intensity and higher initial magnetic permeability.

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 present application belongs to the field of driving technology, and provides a constant current driving circuit, a constant current driving device and a lamp. Alternating current is connected through a rectifier module, and the alternating current is rectified to generate a direct current voltage signal. An electrolytic capacitor is arranged at the output end of the rectifier module to improve the circuit efficiency and eliminate the flicker phenomenon in the direct current voltage signal. The driving module generates a constant current driving signal according to the direct current voltage signal in an intermittent conduction mode, and adjusts the output duty cycle according to the constant current driving signal to maintain the constancy of the current of the constant current driving signal. The electromagnetic suppression module filters out the clutter interference signal in the direct current voltage signal to improve the electromagnetic performance of the circuit, and solves the problem of high driving cost and large driving space size caused by adding an additional anti-flash circuit in the circuit.

This invention relates to a high-power, low-loss Li-based microwave ferrite for LTCC and its preparation method, belonging to the field of electronic ceramics technology. The ferrite, based on its respective standard components, contains the following content: Li₂CO₃ 11.80–12.24 mol%, ZnO 19.87–20.41 mol%, TiO₂ 10.78–11.08 mol%, Mn₃O₄ 0.39–2.65 mol%, Co₃O₄ 0.04–0.58 mol%, Fe₂O₃ 54.70–56.18 mol%, and Bi₂O₃ 0.09 mol%. This invention introduces high-valence Mn ions into the Li-based microwave ferrite, altering the ferrite grain size distribution, particularly increasing the proportion of fine grains, thus improving the spin linewidth. Based on grain refinement, the introduction of an appropriate amount of Co ions with rapid relaxation characteristics further enhances the ferrite's spin linewidth.

The invention discloses an axial flux permanent magnet synchronous reluctance motor rotor based on modular harmonic counteracting, the rotor is designed in a three-in-one mode of structure modularization, magnetic barrier gradient and phase computable dislocation, a rotor assembly is formed by splicing N fan-shaped rotor modules along the circumference, and the adjacent modules are provided with optimal dislocation angles calculated according to the harmonic counteracting principle. The sum of target harmonic magnetic field vectors generated by each module is zero; a U-shaped magnetic barrier array of which geometric parameters are monotonically changed in a gradient manner is arranged in the fan-shaped rotor module, and a permanent magnet group is embedded in the fan-shaped rotor module; main electromagnetic harmonic waves are offset from the source, magnetism gathering and resistance increasing functions are decoupled, the mechanical robustness and the electromagnetic performance of the motor are improved, meanwhile, overall machining is converted into standardized module assembling, the manufacturing cost and the maintenance difficulty are reduced, different motor pole numbers can be flexibly adapted, and the service life of the motor is prolonged. The method is suitable for high-end application scenes such as new energy automobiles, industrial driving and aerospace.

This invention provides a coreless stator for a high current density axial flux motor and an axial flux motor. The coreless stator of the high current density axial flux motor includes at least one stator winding layer, which includes several circumferentially spaced and independent conductive coil units. In each stator winding layer, several conductive coil units are processed on a conductive substrate using a subtractive process. Each conductive coil unit includes a planar working portion extending straight in a radial plane, an outer transition line portion connected to the outer end of the planar working portion, and an inner transition line portion connected to the inner end of the planar working portion. At least one of the outer transition line portion and the inner transition line portion is bent wholly or partially relative to the planar working portion, thereby forming a three-dimensional transition line portion. This directly releases the radial plane space occupied by the outer transition line portion and the inner transition line portion, thereby significantly increasing the radial width and total area of ​​the effective electromagnetic working area and achieving a significant improvement in torque and power density.

The invention discloses a high-voltage power frequency operation permanent magnet synchronous motor rotor structure which comprises permanent magnet magnetic steel and a rotor punching sheet, the rotor punching sheet is concentrically matched with a stator punching sheet of a high-voltage power frequency operation permanent magnet synchronous motor, and a uniform air gap is reserved between the outer diameter of a rotor and the inner diameter of a stator. The rotor punching sheet is internally provided with a permanent magnet magnetic steel groove, a conducting bar groove for arranging a rotor conducting bar and a ventilation hole, the rotor punching sheet is provided with an inner circle for placing a rotating shaft, and interference fit is realized through hot sleeving of the rotating shaft and the inner circle of the rotor. The internal structural layout of the rotor is optimized, the overall electromagnetic performance of the motor is improved, higher power density is expected to be achieved for existing permanent magnet products in the market, and therefore the lower product cost under the same specification requirement is met, and the rotor has the advantages of being good in structural strength, high in power density and good in heat dissipation performance.

The invention provides a magnetron structure. The magnetron structure comprises a main body part which is provided with an accommodating cavity; the main body part is provided with a plurality of fan blade parts, and the multiple fan blade parts are arranged around the containing cavity at intervals; a resonant cavity is formed in a gap between every two adjacent fan blade parts; the resonant cavity is communicated with the accommodating cavity; the mounting groove is formed in the multiple fan blade parts and communicates with the resonant cavity, so that an annular groove is defined; the diaphragm belt is arranged in the mounting groove; wherein the mounting groove comprises a shallow groove section and a deep groove section, and the depth of the deep groove section is larger than that of the shallow groove section in the extending direction of the containing cavity; at least two shallow groove sections and at least two deep groove sections are arranged, and the shallow groove sections and the deep groove sections are alternately arranged at intervals. Through the technical scheme provided by the invention, the technical problem that the supporting stability of the structure for supporting the diaphragm belt in the magnetron in the prior art is relatively poor can be solved.

The invention discloses a high-voltage-resistant metal frame structure in-situ coated amorphous powder material for an inductor and a preparation method of the high-voltage-resistant metal frame structure in-situ coated amorphous powder material. The surface of the amorphous powder material is coated with an inorganic metal frame structure serving as an insulating layer in situ. According to the invention, the amorphous powder material is coated in situ through the metal frame structure with the pore structure, so that the pressure resistance and chemical stability of an inductor product can be greatly improved, and the light weight of the inductor can be effectively realized; the method disclosed by the invention is simple, convenient to operate and good in coating effect, can realize industrialization, and has a great application prospect in the field of high-frequency inductors.

The invention discloses a low-impedance anti-static composite circuit board and a manufacturing method thereof, and the method comprises the following steps: S1, selecting a substrate material which is a composite material with a low dielectric constant and a low dielectric loss factor, the composite material comprises ABS (Acrylonitrile Butadiene Styrene) resin, a styrene-butadiene copolymer, conductive particles and reinforced fibers, s2, optimizing the proportion of the ABS resin to other components in the substrate material; s3, designing a circuit layout, optimizing grounding connection in a low-impedance mode, and surrounding the electroplating through hole on a grounding plane in the circuit board; s4, attenuating ESD current by using a magnetic substance in the design of the circuit board, and improving electromagnetic field resistance caused by indirect ESD by adopting the design of a multi-layer board; and S5, strict moisture-proof and anti-static measures are taken in the processing process of the circuit board A. By adopting the method to manufacture the circuit board, the dielectric property, the mechanical property, the antistatic capability, the electromagnetic compatibility and the production quality of the circuit board are remarkably improved.

The invention discloses a three-stroke transverse through groove salient pole circular motor which comprises a rotor and a stator, the rotor is rotatably arranged in the middle of the stator, rotor salient poles are arranged on the rotor, and the number of the rotor salient poles is a; transverse through grooves are formed in the inner side of the stator, the number of the transverse through grooves is b, coils are wound around the peripheries of the transverse through grooves, and stator salient poles are formed by electrifying the coils; the periphery of the stator salient pole is provided with a magnet vane; the number a of the rotor salient poles is greater than or equal to 2 and is a multiple of 2, the number b of the transverse hyperactivity through grooves is greater than or equal to 3 and is a multiple of 3, the ratio of the rotor salient poles to the transverse hyperactivity through grooves is always kept to be 2: 3, and b-a = 1, 2, 3, 4... A. The structure is simple, no permanent magnet structure exists, and the manufacturing cost is low; through the design of the magnet vane, the electromagnetic force generated by the coil can be prevented from being lost outwards, and the work efficiency of the motor is enhanced.

The utility model relates to a plug-in type stator core structure of a disc type motor, which comprises a stator tooth part and a stator yoke part, and the stator tooth part and the stator yoke part are connected in a splicing mode. Tooth boots extending towards the two sides are arranged at the top ends of the stator tooth parts, so that the stator winding is wound from bottom to top from the bottoms of the stator tooth parts. And the stator tooth part and the tooth boot are made of oriented silicon steel. When the stator is used, the flat wire can be directly wound from the lower end of the stator tooth part when forming a winding, so that the winding is more convenient, and the slot fullness rate is increased. The area of the tooth boot part can be increased, the problem of flat wire passing does not need to be considered any more, and the electromagnetic performance of the whole machine is improved. The stator tooth part is made of oriented silicon steel, and the stator yoke part is made of non-oriented silicon steel, so that the flux density defect caused by magnetic line turning is reduced and the output torque is increased by utilizing different characteristics of materials.

This invention discloses an integrated ultra-wideband absorbing material. From top to bottom, the material comprises a first lossy dielectric substrate, multiple lightweight interlayers, five resistive frequency selective surfaces, a metal backplate, and a composite material frame penetrating between the layers. Through slots are formed between the square rings and concentric geometric patterns of each resistive frequency selective surface. The composite material frame is embedded in these slots and continuously arranged along the thickness direction, creating a non-uniform dielectric structure within the material composed of high-dielectric and low-dielectric regions. This structure jointly regulates the resonance conditions and equivalent impedance gradient of the multiple resistive frequency selective surfaces, shifting the low-frequency absorption initiation frequency towards lower frequencies without increasing the thickness, and maintaining stable absorption performance at large oblique incidence angles. Simultaneously, the composite material frame improves the overall structural mechanical stability. This invention achieves thinness, wide bandwidth, and wide-angle absorption characteristics, making it suitable for electromagnetic stealth and electromagnetic compatibility applications.

The invention relates to an iron-based gyromagnetic material calculated based on a first principle and a screening method thereof, the crystal structure of the material is a garnet structure, and the chemical general formula of the material is Sr < x > Y < 3-x > Scy Fe < 5-y > O < 12 >, the value range of x is 0 lt; xlt; 3, the value range of y is 0 lt; yt; Yt; 5. On the basis of a first principle calculation result, a specific doping combination capable of remarkably improving the dielectric constant and improving the saturation magnetization intensity is screened out, namely, a double-ion co-doping strategy that c site is replaced by Sr and a site is replaced by Sc is adopted. According to the method, experiments are guided through theoretical calculation, the problems that a traditional trial-and-error method is long in period and large in blindness are effectively solved, and the iron-based gyromagnetic material with excellent electromagnetic performance is obtained.

The present application relates to an electromagnetic tripping device and a DC switch device. The electromagnetic tripping device triggers a switch action by electromagnetic force, and includes: a main coil and a main iron core; a main push rod, which can move between a main push rod extension position and a main push rod retracted position along the central axis of the main coil, and the main push rod triggers a switch action at the main push rod extension position; a control coil and a control iron core, the control coil can receive current to generate a control magnetic field; the control push rod, which can move between a control push rod extension position and a control push rod retracted position along the central axis of the control coil, wherein the control iron core can push the control push rod from the control push rod retracted position to the control push rod extension position under the action of the electromagnetic force of the control magnetic field, and wherein, the control push rod drives the main push rod from the main push rod retracted position to the main push rod extension position during the process of the control push rod moving from the control push rod retracted position to the control push rod extension position. This scheme improves the operating reliability of the electromagnetic tripping device.

The utility model discloses a metasurface unit for conformal design. The metasurface unit comprises a bottom layer, a first dielectric layer and a metal pattern layer which are stacked in sequence, the metal pattern layer comprises a first metal layer, a first active control element and a second active control element; the first metal layer is provided with a first rectangular hollow hole and a second rectangular hollow hole; a first metal patch is arranged in the middle of the first rectangular hollow hole, and a second metal patch is arranged in the middle of the second rectangular hollow hole; the first metal patch is provided with a first conductive through hole, and the second metal patch is provided with a second conductive through hole; the first metal layer also has a third conductive via. The metasurface unit provided by the utility model has relatively high conformal capability and relatively good electromagnetic performance at the same time.

The invention discloses an iron-silicon-chromium soft magnetic powder material which comprises the following raw materials in percentage by mass: 2-7% of silicon, 2-10% of chromium, 0-5% of nickel and cobalt and the balance of iron, the use amount of nickel and cobalt is greater than 0, and the sum of the use amount of silicon, chromium, nickel, cobalt and iron is 100%. The iron-silicon-chromium soft magnetic powder material is high in powder apparent density and tap density, low in powder oxygen content and high in inductance value and magnetic conductivity, and can meet the high-performance requirements of electronic components on metal soft magnetic alloy powder.

The invention provides a motor with a braking function, which comprises a stator assembly and a rotor assembly, and is characterized in that the stator assembly comprises a stator iron core with a mounting groove and a stator coil arranged in the mounting groove, and further comprises a first braking module; the first braking module comprises eddy current conductor assemblies arranged in the mounting grooves and a permanent magnet assembly arranged outside the rotor assembly in a sleeving mode, each eddy current conductor assembly comprises a first eddy current conductor and a first magnetic conduction backboard, the first eddy current conductors are arranged at the opening ends of the mounting grooves, and the first magnetic conduction backboard is arranged at the opening ends of the mounting grooves. The first magnetic back plate is located in a magnetic area between the first eddy current conductor and the stator coil; and the permanent magnet assembly is arranged opposite to the first eddy current conductor at the corresponding position. The motor has the advantages that the driving and braking buffering functions are simultaneously realized on the basis of the original motor size, and the like.

The invention discloses a sectional type rotor structure, and belongs to the technical field of servo motors. The structure comprises a plurality of iron core sections formed by laminating the same kind of rotor punching sheets, and the punching sheets are provided with asymmetrical front surfaces and back surfaces. A first type of iron core sections are formed by laminating with the front faces facing upwards, a second type of iron core sections are formed by laminating with the back faces facing upwards, and the two types of iron core sections are alternately arranged in the axial direction and staggered by a certain angle around the axis. Each iron core section is provided with a positioning part, and two adjacent iron core sections achieve accurate angle positioning and assembly by aligning the positioning parts. According to the invention, the segmented rotor with the dislocation effect can be manufactured by using only one set of mold, so that the cost is greatly reduced; the cogging torque and the electromagnetic noise are effectively weakened through the segmented pole staggering effect, and the operation stability is improved; meanwhile, the permanent magnet is firmly installed, the assembling process is simple and convenient, mistake proofing is achieved, and the consistency and reliability of products are guaranteed.

This invention provides a coreless stator with a high magnetic flux density and a thin working area, and an axial flux motor. The coreless stator includes a first winding unit and a second winding unit stacked axially. Several winding coils of the first and second winding units are fabricated on a conductive substrate using a subtractive process. Each winding coil includes a working area, a hollow slot, and bent outer and inner coil bridging areas. The first and second winding units are circumferentially misaligned during axial stacking, so that the working areas of the first and second winding units are circumferentially spaced and distributed in the same radial plane, forming the stator working section. The thickness of the stator working section does not exceed half the total thickness of the coreless stator. This application further thins the stator working section of the coreless stator, significantly reducing the effective working air gap length of the axial flux motor, significantly enhancing the air gap magnetic flux density, improving the motor's torque density and power density, and achieving synergistic optimization of performance and reliability.

The invention discloses a trigger circuit of a plasma discharge switch, the trigger circuit is used for triggering a plasma switch, the trigger circuit further comprises a low-voltage input end, a trigger signal end, an electronic switch, a coupling inductor and a one-way switch, the low-voltage input end is used for providing input voltage; the trigger signal end is used for sending out one or more pulse signals, the output end of the trigger signal end is connected with a control electrode of the electronic switch, the coupling inductor is formed by coupling a primary inductor and a secondary inductor, the two ends of the primary inductor are connected with the low-voltage input end and one connecting end of the electronic switch respectively, and the other connecting end of the electronic switch is grounded. The cathode of the plasma switch is grounded, the anode of the plasma switch is connected with the high-voltage circuit at the rear end, and the trigger electrode of the plasma switch is connected with the cathode of the one-way switch. The manufacturing process is simple, and miniaturization integration is easy; the circuit is simple, and the system complexity is greatly reduced; the system is high in reliability and strong in false triggering prevention capability.

The application relates to the technical field of antennas, in particular to an ultra-wideband reconfigurable one-bit trans-reflection array unit and an antenna. The ultra-wideband reconfigurable one-bit trans-reflection array unit comprises a first dielectric layer, a second dielectric layer and a third dielectric layer arranged in a stacking structure in sequence. A first metal polarization grid is arranged on the top of the first dielectric layer. A second metal polarization grid and a feeding structure are arranged on the bottom of the third dielectric layer. A reconfigurable metal resonator is arranged on the top of the second dielectric layer. The reconfigurable metal resonator is connected with a bias line of the feeding structure through a metal column passing through a metalized through hole. A plurality of switching elements are arranged on the reconfigurable metal resonator. The above scheme integrates the transmission and reflection functions on a single trans-reflection array unit, realizes beam scanning in the whole space range, breaks through the limitation that a traditional space-fed array antenna can only work in a half-space scene, and is favorable for improving the application range of the antenna.

The invention provides a surface nitriding treatment seawater corrosion-resistant wave-absorbing material and a preparation method thereof, and belongs to the technical field of metal surface treatment.The preparation method specifically comprises the steps that firstly, carbonyl iron powder is pretreated, specifically, acid pickling is conducted to remove surface impurities and an oxide layer, and then the carbonyl iron powder is subjected to surface nitriding treatment; and cleaning residual acid liquor and other soluble impurities with water. And then the pretreated carbonyl iron powder is placed in a nitriding furnace to be subjected to surface nitriding treatment, and after nitriding treatment is completed, heat treatment and surface modification treatment are conducted. And complicated chemical reaction and high-temperature treatment are abandoned, so that the production cost is reduced. After nitriding treatment, a compact iron nitride protection layer is formed on the surface of the carbonyl iron powder, so that the corrosion resistance of the carbonyl iron powder material in a marine environment is enhanced, the electromagnetic property of the carbonyl iron powder material is optimized, and the thermal stability and the electromagnetic wave absorption efficiency are improved.

The invention relates to the technical field of preparation of microwave ferrite materials, in particular to a high-power and low-loss NiCuZn microwave ferrite material and a preparation method thereof.The high-power and low-loss NiCuZn microwave ferrite material is prepared from NiCuZn ferrite powder and modified multi-walled carbon nanotubes, Bi2O3 and CaO in additives in the NiCuZn ferrite powder can remarkably reduce the sintering temperature of ferrite, and the sintering temperature of the ferrite can be remarkably lowered; mnCO3 is added to improve the saturation magnetization intensity and electromagnetic performance of the ferrite material, in the sintering process, MnCO3 can inhibit generation of Fe < 2 + >, and the dielectric loss is increased along with the increase of Fe < 2 + >, so that the loss of the ferrite is reduced; the Pi-Pi conjugation effect formed by the modified multi-walled carbon nanotubes can improve the conductivity of the whole system, and the modified multi-walled carbon nanotubes are beneficial to loading ferrite and can enhance the conductivity and dispersion performance of the ferrite material, so that the electromagnetic performance of the ferrite material is improved, the loss is low, and the application prospect is wide.

The application discloses a kind of MXene-based composite wave-absorbing materials and preparation method thereof, water-based electromagnetic functional color paste and preparation method and application, the MXene-based composite wave-absorbing material provided in the application is with two-dimensional layered MXene nanosheet as carrier, and Fe3O4@Ag core-shell structure nanosphere is loaded on the surface and interlayer of two-dimensional layered MXene nanosheet.The above-mentioned MXene-based composite wave-absorbing material is by electrostatic self-assembly process, Fe3O4@Ag core-shell structure nanosphere is loaded on the surface and interlayer of two-dimensional layered MXene nanosheet, the composite of both is realized.In addition, the application further provides water-based electromagnetic functional color paste comprising the above-mentioned composite wave-absorbing material, the color paste shows excellent storage stability and outstanding electromagnetic shielding and absorption performance, and can be suitable for a variety of coating processes.