Preparation method of quasi-superconducting composite strong magnetic material and magnetizer device

Abstract

The invention relates to a preparation method of a quasi-superconducting composite strong magnetic material and a magnetizer device, belongs to the technical field of magnetic materials, and relates to the preparation method of the quasi-superconducting composite strong magnetic material, and the preparation method of the quasi-superconducting composite strong magnetic material comprises the following steps: S1, preparing a nano powder material; the preparation method comprises the following steps: preparing cobalt, black phosphorus, nickel alkene, dysprosium, graphene, fullerene and boron alkene into a nano powdery material; s2, preparing a powder blank, namely uniformly mixing nano-powder cobalt, black phosphorus, nickel alkene, dysprosium, graphene, fullerene and boron alkene powder materials according to a preset proportion to prepare a prepared powder blank; s3, powder blank die-casting is conducted, specifically, the prepared powder blank is subjected to die-casting forming in a high-pressure environment; and S4, in a high-pressure environment and an ultra-vacuum environment, performing high-temperature plasma sintering shaping on the die-cast powder blank at the temperature of 1500-3000 DEG C to obtain the nano quasi-superconducting composite material with required physical and mechanical properties.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic materials, and more specifically, to a method for preparing a quasi-superconducting composite strong magnetic material and a magnetizing machine device. Background Art

[0002] Magnetic materials are substances with magnetism that can be affected by magnetic fields and exhibit magnetization phenomena. Magnetic materials are widely used in many fields such as electromechanics, electronics, computer and communication, digital storage, medical treatment, and mechanical manufacturing. With the development of modern science and technology, especially the increasing demand for and higher performance requirements of permanent magnetic materials. Currently, there are a wide variety of magnetic materials with different specific principles. Most permanent magnetic materials are made of neodymium iron boron, ferrite, aluminum nickel cobalt, samarium cobalt, etc., which have characteristics such as large coercive force and stable performance. These magnetic materials are magnetized by short-pulse discharging of a solenoid through a high-voltage and high-current magnetizing power supply.

[0003] However, with the development of modern science and technology and equipment, existing magnetic materials can no longer fully meet the new requirements of technological progress. Therefore, it is necessary to study higher-performance magnetic materials to adapt to the new development needs. Against this background of technological development, the present invention provides a method for preparing a quasi-superconducting composite strong magnetic material and a magnetizing machine device, which have a significant improvement in performance compared to existing magnetic materials and have a positive effect on those technological devices using ultra-high-performance magnetic materials. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that, with the development of modern science and technology and equipment, existing magnetic materials can no longer fully meet the new requirements of technological progress. Therefore, it is necessary to study higher-performance magnetic materials to adapt to the new development needs. Against this background of technological development, the present invention provides a method for preparing a quasi-superconducting composite strong magnetic material and a magnetizing machine device, which have a significant improvement in performance compared to existing magnetic materials and have a positive effect on those technological devices using ultra-high-performance magnetic materials. Aiming at the above-mentioned defects of the prior art, a method for preparing a quasi-superconducting composite strong magnetic material and a magnetizing machine device are provided.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] Construct a method for preparing a quasi-superconducting composite strong magnetic material, including:

[0007] The method for preparing the quasi-superconducting composite strong magnetic material includes the following steps:

[0008] S1: Preparation of nano-powder materials, preparing cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borene into nano-powder materials;

[0009] S2: Preparation of powder blank: Cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene powder materials in nano-powder form are uniformly mixed in a predetermined ratio to prepare a preliminary powder blank.

[0010] S3: Powder blank die-casting: The preliminary powder blank is die-cast into a mold under high pressure.

[0011] S4: Under high pressure and ultra-high vacuum environments, the die-cast powder blank is subjected to high-temperature plasma sintering at a temperature of 1500 °C to 3000 °C to obtain a nano-quasi-superconducting composite material with the required physical and mechanical properties.

[0012] Optionally, the ratio for uniformly mixing the cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene powder materials in nano-powder form to prepare the preliminary powder blank is a molar ratio, and cobalt: 0.5 to 20, black phosphorus: 20 to 80, nickelene: 1.0 to 20, dysprosium: 0.1 to 5, graphene: 1.0, fullerene: 1.0, borophene: 1.0.

[0013] Optionally, the pressure in the high-pressure environment in S3 and S4 is 1 GPa to 100 GPa.

[0014] Optionally, in S3, the preliminary powder blank needs to be die-cast into a mold in one go under high pressure.

[0015] Optionally, the preferred molar ratio values of the cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene powder materials in nano-powder form are cobalt: 18, black phosphorus: 61, nickelene: 8, dysprosium: 1.0, graphene: 1.0, fullerene: 1.0, borophene: 1.0.

[0016] Optionally, the cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene in S1 are processed into nano-powder materials by a nano-ball mill and / or a nano-roller mill.

[0017] Optionally, the nano-powder materials are uniformly stirred in a powder mixer according to a predetermined ratio.

[0018] A magnetizing machine device includes a method for preparing a quasi-superconducting composite strong magnetic material, which includes: using die-casting technology to mix cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene to prepare a powder blank for the magnetic head, ensuring the uniformity and good density of the materials.

[0019] Optionally, after die casting, the magnetizing head powder blank or the magnetizing coil powder blank is processed to meet the shape and size requirements. High-precision machining or laser engraving technology is used to perform surface treatment and detailed engraving on the magnetizing head powder blank or the magnetizing coil powder blank to ensure its high degree of fit with other magnetic components. During the processing, it is also necessary to ensure that the surface is smooth and defect-free to reduce magnetic field leakage, thereby improving the working efficiency of the magnetizing head.

[0020] Optionally, the fabricated magnetizing head powder blank or magnetizing coil powder blank is magnetized to form a stable magnetic field. By controlling the magnetizing current and time, it is ensured that the magnetic field intensity of the magnetizing head powder blank or magnetizing coil powder blank reaches the expected requirements, and then the finished magnetizing head and / or magnetizing coil are made.

[0021] The beneficial effects of the present invention are as follows:

[0022] By preparing materials such as cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene into nano-powders, the present invention can ensure the uniformity and stability of the materials at the microscale, which helps to improve their performance. The nano-sized materials have a higher specific surface area, which can significantly improve the activity and functionality of the composite material. The different nano-powders are uniformly mixed according to a predetermined ratio to ensure the uniform distribution of each component, thereby improving the overall performance stability of the final composite material. By performing die casting under high pressure, it can be ensured that the powder materials are tightly combined during the forming process to form a relatively uniform and dense powder blank, improving the effect of subsequent processing. Sintering at a high temperature of 1500 °C to 3000 °C can effectively improve the crystal structure of the material, making it have excellent stability and long-term working performance, which is particularly significant in the field of superconductivity. Utilizing the characteristics of high magnetic conductivity, high electrical conductivity, and low power consumption of cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene, the magnetizing effect can achieve the lowest energy loss and the maximum energy conversion and storage. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0024] Figure 1 is a flowchart of the preparation method of the quasi-superconducting composite strong magnetic material in the present invention.

[0025] Figure 2 is a flowchart of the production process of the magnetizing head and the magnetizing coil in the present invention. Detailed Embodiments

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative work fall within the protection scope of the present invention.

[0027] As shown in the embodiments of the present invention Figure 1 - Figure 2 it relates to a method for preparing a quasi-superconducting composite high magnetic material. The method for preparing the quasi-superconducting composite high magnetic material includes the following steps:

[0028] S1: Preparation of nano-powder materials. Cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene are prepared into nano-powder materials.

[0029] S2: Making of powder blanks. The nano-powder materials of cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene are uniformly mixed in a predetermined ratio to make a preliminary powder blank.

[0030] S3: Die-casting of powder blanks. The preliminary powder blank is die-cast into a shape under a high-pressure environment.

[0031] S4: Under a high-pressure environment and an ultra-high vacuum environment, the die-cast powder blank is subjected to high-temperature plasma sintering and shaping at a temperature of 1500 °C to 3000 °C to obtain a nano quasi-superconducting composite material with the required physical and mechanical properties. In this embodiment, by utilizing the characteristics of high magnetic conductivity, high electrical conductivity, and low power consumption of cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene, the magnetization effect can achieve the lowest energy loss and the maximum energy conversion and storage. Further, cobalt (Co) is a silver-white ferromagnetic metal with a silver-white color slightly tinged with light pink on the surface. It is located in the 4th period and Group VIII in the periodic table, with an atomic number of 27 and an atomic weight of 58.9332. It has a close-packed hexagonal crystal structure, and the common valence states are +2 and +3. Cobalt is a steel-gray metal with luster, relatively hard and brittle, ferromagnetic, and loses its magnetism when heated to 1150 °C. The valence states of cobalt are +2 and +3. It does not react with water at room temperature and is also very stable in humid air. Cobalt is an important raw material for producing magnetic alloys;

[0032] Black phosphorus (P) is metallic phosphorus, an allotrope of phosphorus. It is black with a metallic luster and its crystals can be orthorhombic, rhombic, cubic or amorphous solids. Physicochemical properties: density 2.7 g / cm³, non-toxic, metallic and conductive, with excellent electrical properties, having a graphite-like lamellar structure, insoluble in water and organic solvents, chemically stable at room temperature and not easily catching fire or burning. Black phosphorus can be prepared by any method in the existing technology. For example, two-dimensional single-crystal black phosphorus can be prepared by ultrasonic liquid-phase centrifugation technology. The black phosphorus liquid solvent is separated by ultrasonic vibration and then the black phosphorus flakes are filtered and classified according to different sizes by an ultra-high centrifuge to obtain high-quality nanosheets; among them, the black phosphorus can be black phosphorus (dilute), that is, nano black phosphorus flakes or nano black phosphorus ene two-dimensional materials.

[0033] Nickelene (Ni) is nickel with a single atomic thickness, ferromagnetic, melting point 1453 °C, density 8.9 g / cm³, boiling point 2732 °C, a powder metallurgy structural material, active and easy to self-ignite, corrosion-resistant, alkali-resistant, and a medium-strength reducing agent.

[0034] Dysprosium (Dy) is a silver-white metal, soft, melting point 1412 °C, boiling point 2562 °C, density 8.55 g / cm³; dysprosium includes nano dysprosium or nano two-dimensional dysprosium metal, and two-dimensional dysprosium is prepared by pressing three-dimensional dysprosium into two-dimensional by van der Waals extrusion technology. Two-dimensional dysprosium metal refers to dysprosium metal with a single atom or a few atomic layers. It mainly plays a role in synthesis catalysis and magnetic materials.

[0035] Graphene is a new material with a single layer of two-dimensional honeycomb lattice structure formed by sp 2 hybridized connected carbon atoms, having excellent optical, electrical and mechanical properties.

[0036] Graphene is one of the materials with the highest known strength. At the same time, it also has good toughness and can be bent. The theoretical Young's modulus of graphene reaches 1.0 TPa, and the inherent tensile strength is 130 GPa.

[0037] The carrier mobility of graphene at room temperature is about 15000 cm² / (V·s), which is more than 10 times that of silicon materials.

[0038] Graphene has very good thermal conductivity. The thermal conductivity of pure defect-free single-layer graphene is as high as 5300 W / mK, which is the carbon material with the highest thermal conductivity so far.

[0039] Graphene has very good optical properties, with an absorption rate of about 2.3% in a relatively wide wavelength range and is almost transparent.

[0040] Fullerene is a cage-shaped convex polyhedral allotrope of elemental carbon, mostly a C2n-shaped convex polyhedron composed of pentagonal and hexagonal faces. It has the properties of high hardness, strong ductility, strong conductivity and light weight.

[0041] Borophene is a two-dimensional layered allotrope of elemental boron, composed of a mixed triangular lattice and hexagonal holes. It has good physical properties, including high flexibility, optical transparency, high thermal conductivity, one-dimensional nearly free electron state, metallic Dirac fermions, superconductivity, etc.

[0042] In this embodiment, the proportional relationship of the nano-powdered cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene powder materials uniformly mixed to make a preliminary powder embryo is a molar ratio, and cobalt: 0.5 to 20, black phosphorus: 20 to 80, nickelene: 1.0 to 20, dysprosium: 0.1 to 5, graphene: 1.0, fullerene: 1.0, borophene: 1.0; preferably cobalt: 18, black phosphorus: 61, nickelene: 8, dysprosium: 1.0, graphene: 1.0, fullerene: 1.0, borophene: 1.0;

[0043] In some embodiments, the ratio can be changed. For example, cobalt: 1.2, black phosphorus: 25, nickelene: 1.5, dysprosium: 0.2, graphene: 1.0, fullerene: 1.0, borophene: 1.0;

[0044] Cobalt: 5.4, black phosphorus: 32, nickelene: 2.9, dysprosium: 0.8, graphene: 1.0, fullerene: 1.0, borophene: 1.0;

[0045] Cobalt: 6.9, black phosphorus: 43, nickelene: 5.6, dysprosium: 1.5, graphene: 1.0, fullerene: 1.0, borophene: 1.0;

[0046] Cobalt: 8.7, black phosphorus: 50, nickelene: 7.9, dysprosium: 2.8, graphene: 1.0, fullerene: 1.0, borophene: 1.0;

[0047] Cobalt: 12.6, black phosphorus: 59, nickelene: 10, dysprosium: 3.5, graphene: 1.0, fullerene: 1.0, borophene: 1.0;

[0048] Cobalt: 15.3, black phosphorus: 68, nickelene: 16, dysprosium: 4.6, graphene: 1.0, fullerene: 1.0, borophene: 1.0;

[0049] Cobalt: 18.9, black phosphorus: 74, nickelene: 19, dysprosium: 4.8, graphene: 1.0, fullerene: 1.0, borophene: 1.0. It should be particularly noted that the specific values of the above different components can also be arbitrarily combined with each other.

[0050] In this embodiment, the pressure in the high-pressure environment in S3 and S4 is 1 GPa to 100 GPa. The specific die-casting strength can be set according to the requirements of parameters such as the shape, size, density, and hardness of the powder compact. The powder compact die-casting mold is designed for one-time die-casting and shaping according to its function. For example: if the required die-cast workpiece is annular, U-shaped, or horseshoe-shaped, the die-casting mold is designed into the corresponding annular, U-shaped, or horseshoe-shaped structure.

[0051] In this embodiment, in S3, the preliminary powder compact needs to be die-cast and formed in one go under a high-pressure environment.

[0052] In this embodiment, the cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene in S1 are processed into nano-powdered materials by a nano ball mill and / or a nano grinder. Further, the preparation of the nano-powder can be carried out by one or more of mechanical powder making, physical powder making, and chemical powder making. Mechanical powder making converts solid metals or alloys into powders through mechanical actions such as crushing, smashing, and grinding. According to the degree of comminution, the equipment can be divided into two categories: coarse crushing and fine crushing. Coarse crushing equipment mainly includes crushers, roller mills, jaw crushers, etc., which initially crush the metal through crushing action. Fine crushing equipment includes hammer crushers, rod mills, ball mills, vibrating ball mills, agitated ball mills, etc., which further crush the metal mainly through smashing and grinding actions. The mechanical powder making method is especially suitable for brittle and work-hardening-prone metals and alloys, such as tin, manganese, chromium, high-carbon iron, and ferroalloys. At the same time, it is also used to crush sponge metals obtained by the reduction method, cathode deposits obtained by the electrolysis method, etc. In addition, for titanium that becomes brittle after hydrogenation, the mechanical comminution method is equally effective. Usually, dehydrogenation treatment is carried out after crushing to obtain fine titanium powder.

[0053] Although the mechanical powder making method has problems such as low efficiency and high energy consumption, it is often used as an auxiliary means for other powder making methods or for mixing powders with different properties. In addition to traditional crushing, smashing, and grinding equipment, a vortex mill is a commonly used refining equipment. This equipment creates a vortex through two impellers, making the particles entrained by the air flow be crushed in high-speed collisions, suitable for the crushing of plastic metals. Further, the cold flow crushing method sprays coarse powder carried by a high-speed and high-pressure inert gas flow onto a metal target, and uses the adiabatic expansion of the air flow at the nozzle outlet to rapidly reduce the temperature to below 0 °C, thereby crushing the coarse powder of metals and alloys with low-temperature brittleness into fine powder. The mechanical alloying method grinds different metals and high-melting-point compounds into a solid solution or fine-dispersed alloy state by a high-energy ball mill, which helps to develop new alloy materials.

[0054] In this embodiment, the nano-powdered materials are stirred evenly by a powder mixer according to a predetermined ratio.

[0055] A magnetizing machine device of the present invention includes a quasi-superconducting composite strong magnetic material prepared by a method for preparing a quasi-superconducting composite strong magnetic material. The cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene are mixed by die-casting molding technology to prepare a powder blank of the magnetizing head, ensuring the uniformity and good density of the material.

[0056] In this embodiment, after die-casting molding, the powder blank of the magnetizing head or the powder blank of the magnetizing coil is processed to meet the shape and size requirements. High-precision machining or laser engraving technology is used to perform surface treatment and delicate engraving on the powder blank of the magnetizing head or the powder blank of the magnetizing coil to ensure its high degree of fit with other magnetic components. During the processing, it is also necessary to ensure that the surface is smooth and defect-free to reduce magnetic field leakage, thereby improving the working efficiency of the magnetizing head.

[0057] In this embodiment, the prepared powder blank of the magnetizing head or the powder blank of the magnetizing coil is magnetized to form a stable magnetic field. By controlling the magnetizing current and time, it is ensured that the magnetic field intensity of the powder blank of the magnetizing head or the powder blank of the magnetizing coil reaches the expected requirements, and then the finished magnetizing head and / or magnetizing coil are made.

[0058] The present invention also includes a magnetizing machine, which mainly includes two major components: a magnetizing power supply and a magnetizing coil. The magnetizing head and the magnetizing coil of the magnetizing machine are manufactured by a method for preparing a quasi-superconducting composite strong magnetic material. A short-pulse high-voltage and large-current is passed through the magnetizing coil to generate an ultra-strong magnetic field. A multi-pole and multi-element magnetizing head is used to magnetize and magnetize a high-coercivity permanent magnetic material, which has the characteristics of high efficiency and reliability. That is, a high-voltage pulse non-polar capacitor discharges through a quasi-superconducting coil with a DC high voltage (i.e., energy storage), and the peak value of the discharge pulse current can reach more than tens of thousands of amperes. The current pulse generates a strong magnetic field in the quasi-superconducting coil and the multi-pole and multi-element magnetizing head. This magnetic field permanently magnetizes the permanent magnetic material. The multi-pole and multi-element is a magnetizing head with a variety of shapes and extremely strong magnetic force that forms a closed magnetic circuit with an electromagnet to make the quasi-superconducting coil generate an ultra-strong magnetic field. When the permanent magnet to be magnetized is magnetized, it can be completed instantly by applying an exciting current. The magnetizing machine is an automated magnetizing device with integrated control and pulse discharge of a storage capacitor. The maximum instantaneous discharge current can reach more than 30 kA, generating an extremely high-intensity magnetic field within 10 ms. Using a quasi-superconducting magnetizing coil will not cause an impact on the power grid. Generating a magnetic field of more than 30,000 Oersted (Oe) instantly is more efficient for magnetizing high-coercivity magnets; the magnetizing power supply control circuit of the magnetizing machine adopts a constant-current and constant-voltage charging control circuit and over-voltage, over-current, and overheat protection functions;

[0059] The main parameters of the magnetizing machine are:

[0060] Power supply: AC 220 ± 10%, 380 ± 10% or above, 50 - 60 Hz;

[0061] Operating environment: 0 - 60 °C;

[0062] Working magnetization voltage: 0 - 600V, 0 - 800V, 0 - 1200V, 0 - 1500V, 0 - 2500V, 0 - 3500V or above;

[0063] Magnetization current: instantaneous 3000 - 30000A or above;

[0064] Capacitance: 200 - 30000uf or above.

[0065] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A preparation method of a quasi-superconducting composite strong magnetic material, characterized in that, The preparation method of the quasi-superconducting composite strong magnetic material comprises the following steps: S1: Preparation of nano-powder materials. Cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene are prepared into nano-powder materials. S2: Production of powder blanks. The nano-powder materials of cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene are uniformly mixed in a predetermined ratio to produce a preliminary powder blank. S3: Die-casting of powder blanks. The preliminary powder blank is die-cast into a mold under a high-pressure environment. S4: Under a high-pressure environment and an ultra-high vacuum environment, the die-cast powder blank is subjected to high-temperature plasma sintering and shaping at a temperature of 1500 °C to 3000 °C to obtain a nano quasi-superconducting composite material with the required physical and mechanical properties.

2. The preparation method of a quasi-superconducting composite high magnetic field material according to claim 1, wherein The proportional relationship for uniformly mixing the nano-powder materials of cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene to produce a preliminary powder blank is a molar ratio, and cobalt: 0.5 to 20, black phosphorus: 20 to 80, nickelene: 1.0 to 20, dysprosium: 0.1 to 5, graphene: 1.0, fullerene: 1.0, borophene: 1.

0.

3. A method for preparing a quasi-superconducting composite high magnetic field material according to claim 1, characterized in that, In S3 and S4, the pressure in the high-pressure environment is 1 GPa to 100 GPa.

4. The preparation method of a quasi-superconducting composite high magnetic material according to claim 3, characterized in that In S3, the preliminary powder blank needs to be die-cast into a mold in one go under a high-pressure environment.

5. A method for preparing a quasi-superconducting composite high magnetic field material according to claim 1, characterized in that, The preferred molar ratio values of the nano-powder materials of cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene are cobalt: 18, black phosphorus: 61, nickelene: 8, dysprosium: 1.0, graphene: 1.0, fullerene: 1.0, borophene: 1.

0.

6. The preparation method of a quasi-superconducting composite high magnetic field material according to claim 1, characterized in that In S1, the cobalt, the black phosphorus, the nickelene, the dysprosium, the graphene, the fullerene, and the borophene are processed into nano-powder materials by a nano ball mill and / or a nano grinder.

7. The preparation method of a quasi-superconducting composite strong magnetic material according to claim 1, wherein, The nano-powder materials are stirred evenly by a powder mixer in a predetermined ratio.

8. A magnetizing machine device, characterized in that, A method for preparing a quasi-superconducting composite strong magnetic material according to any one of claims 1-7, comprising: using die-casting technology to mix cobalt, black phosphorus, nickelene, dysprosium, graphene, fullerene, and borophene to prepare a powder blank for a magnetic head, ensuring the uniformity and good density of the material.

9. The magnetizer device according to claim 8, characterized in that, After die-casting, the powder blank for a magnetic head or the powder blank for a magnetic coil is processed to meet the shape and size requirements. Using high-precision machining or laser engraving technology, the powder blank for a magnetic head or the powder blank for a magnetic coil is subjected to surface treatment and detailed engraving to ensure its high degree of fit with other magnetic components. During the processing, it is also necessary to ensure that the surface is smooth and defect-free to reduce magnetic field leakage, thereby improving the working efficiency of the magnetic head.

10. A magnetizer device according to claim 9, characterized in that, The made powder blank for a magnetic head or the powder blank for a magnetic coil is magnetized to form a stable magnetic field. By controlling the magnetization current and time, it is ensured that the magnetic field strength of the powder blank for a magnetic head or the powder blank for a magnetic coil reaches the expected requirements, and then the finished magnetic head and / or the finished magnetic coil are made.

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