Preparation process and preparation device of large gradient high-coercivity samarium-cobalt material

Abstract

This invention discloses a high-gradient, high-coercivity samarium-cobalt material preparation process and apparatus, relating to the field of magnetic material preparation technology. It includes two connecting components, with a detachable double-ended bottle body installed between them; the double-ended bottle body is made of heat-insulating material and serves as a sintering chamber. In use, by designing the sintering furnace for forming the samarium-cobalt material as a modular structure, the apparatus allows for flexible installation of auger conveyors for transporting raw materials and processing components for pulling out the forming parts at both ends of the sintering furnace. Furthermore, the sintering furnace acts as a connecting element, enabling linkage between the auger conveyors and the processing components. Compared to traditional integrated material production lines, this apparatus offers advantages such as modular structure, flexibility, high efficiency, and maintainability, ensuring production efficiency and adapting to different production needs to a certain extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic material preparation, in particular to a preparation process and device of large gradient high-coercivity samarium-cobalt material. BACKGROUND

[0002] Samarium-cobalt magnet is a kind of magnetic material made of samarium and cobalt alloy,

[0003] Due to the unique properties of samarium and cobalt, such magnets have high magnetic force and stability, however, due to the special crystal structure of samarium-cobalt magnet, the overall mechanical properties of samarium-cobalt magnet material are brittle, similar to ceramic materials.

[0004] After searching, the patent CN107316726B proposes a "preparation method of sintered samarium-cobalt magnet", which is made of alloy powder by oxygen supplement airflow grinding technology, and the edge and corner scrap and waste materials with similar composition are cleaned, crushed, and conventionally airflow ground into auxiliary powder, and then mixed with lubricant to form auxiliary powder; mixing, mixing the alloy powder and auxiliary powder in proportion to prepare samarium-cobalt alloy powder; magnetic field forming and isostatic pressing to prepare a green body; sintering, solid solution and aging treatment to prepare samarium-cobalt magnet, etc. The steps make the sintered samarium-cobalt magnet have good mechanical properties.

[0005] However, the above process has limited linkage between the processing devices in actual implementation, for example, the above-mentioned powder conveying device, sintering device and aging device are independently operated when running, and there is no corresponding linkage between them, so there are the following two problems in actual preparation:

[0006] First, due to the lack of linkage between the processing devices, multiple manual operations and material transfers are required, which may increase the waiting time in the production process, thereby reducing the production efficiency.

[0007] Secondly, due to the independent operation of the processing devices, additional energy and resources are required for multiple material transfers and device start-stop, which will cause waste of energy and resources.

[0008] Therefore, the applicant proposes a new process and device to solve the above problems. SUMMARY

[0009] The purpose of the present application is to provide a preparation process and device of large gradient high-coercivity samarium-cobalt material to solve the problems raised in the background art.

[0010] To achieve the above purpose, the present application provides a preparation device of large gradient high-coercivity samarium-cobalt material: comprising two connecting components, a detachable double-head bottle body is installed between the two connecting components;

[0011] The double-head bottle body is used as a sintering chamber, the bottle mouths of the double-head bottle body are respectively arranged at two ends of the bottle body, one end of the outer wall of the double-head bottle body is fixed with a gas outlet valve pipe for discharging waste gas, the inner wall of the double-head bottle body is respectively fixed with a limiting support on two sides, a movable forming component is sleeved between the two limiting supports;

[0012] The inner wall of the double-head bottle body is further fixed with a microwave generating heater coiled outside the two limiting supports, the microwave generating heater is used for providing heat energy in the double-head bottle body, one end of the outer wall of the double-head bottle body is fixed with an external power supply block for providing electric energy for the microwave generating heater, and a plurality of limiting pin blocks are fixed at the bottle neck of the outer wall of the double-head bottle body and are uniformly distributed with the bottle mouths of the double-head bottle body as the center;

[0013] The connecting component comprises:

[0014] A cover sleeve is used for sealing the bottle mouths of the double-head bottle body, a groove ring matched with the limiting pin blocks is fixed on the inner side of the cover sleeve, a through pipe is fixed on the outer side of the cover sleeve, and a lock catch is jointly installed between the outer surface of the cover sleeve and the outer surface of the double-head bottle body.

[0015] Further, the two ends of the outer wall of the double-head bottle body are respectively provided with a load-bearing seat for being placed on the ground, and the load-bearing seat comprises: a movable roller seat, a support block for bearing a hydraulic cylinder and increasing a stress area.

[0016] The hydraulic cylinder is provided with two, and the two hydraulic cylinders are respectively fixed at the two ends of the top of the roller seat, the top of the two hydraulic cylinders is fixed with the bottom of the support block, and the top of the support block is rotationally connected with the outer wall of the double-head bottle body.

[0017] Further, one end of the outer wall of the double-head bottle body is fixed with a tooth ring, and the top surface of one of the support blocks is provided with a notch matched with the tooth ring.

[0018] Further, the forming component comprises: a screw rod, one end of the screw rod is fixed with a circular plate, a forming die with a hole on the surface is installed outside the circular plate, the forming die is composed of two half circular ring plates, the two half circular ring plates are respectively rotationally connected with the two sides of the outer wall of the circular plate, and a buckle for closing is jointly installed between the two half circular ring plates.

[0019] It should be noted that the device further comprises: a conveying component for transporting raw materials, and the outer wall of the discharge end of the conveying component is rotationally connected with one of the connecting components.

[0020] A processing component is used for separating the forming component from the sintering component, and the outer wall of the processing component is rotationally connected with the outer wall of the other connecting component.

[0021] The conveying component comprises a positionable auger conveyor, a feeding channel is installed at the feeding port of the auger conveyor, the discharging port of the auger conveyor is rotationally connected with one end of the pipe, the shaft body of the auger conveyor is fixed with a connecting frame through the pipe, and the connecting frame is fixed with the pipe.

[0022] The processing component comprises a positionable tank body, a through hole is formed at each end of the tank body, the through hole is matched with the pipe, a threaded screw rod structure is installed inside the tank body, a screw rod is installed at the moving end of the threaded screw rod structure, a transmission component is installed outside the tank body, a linkage is installed between the transmission component and the threaded screw rod structure, and the input end of the transmission component is matched with the tooth ring.

[0023] Further, the threaded screw rod structure comprises a stable frame fixed at the bottom end inside the tank body, a threaded rod is rotationally connected inside the stable frame, the moving end is a force receiving seat, the inside of the force receiving seat is screwed with the outside of the threaded rod, the force receiving seat is slidingly connected with the stable frame, and the top of the force receiving seat is screwed with one end of the screw rod.

[0024] The linkage comprises a transmission wheel and a driving wheel, a transmission belt is sleeved between the transmission wheel and the driving wheel, one side of the transmission wheel is fixed with one end of the threaded rod penetrating through the stable frame, the driving wheel is arranged outside the tank body, one side of the driving wheel is fixed with an extension rod, the outside of the extension rod is sleeved with a reinforcing seat fixed outside the tank body, and one end of the extension rod away from the driving wheel is fixed with a groove disc.

[0025] The transmission component comprises a pipe body fixed at the middle end outside the tank body, a threaded guide groove is formed in the inside of the pipe body, a transmission block is movably connected inside the pipe body, a guide pin matched with the guide groove is fixed outside the transmission block, two extension rods are respectively arranged at two sides of the transmission block, a tooth disc and a transmission disc are respectively fixed at opposite ends of the two extension rods, the transmission disc is rotationally connected with the pipe body, a plurality of transmission protrusions are fixed on the surface of the transmission disc, the transmission protrusions are matched with the groove disc, and the tooth disc is matched with the tooth ring.

[0026] Further, one end of the outside of the pipe body is fixed with a gas injection valve pipe for connecting cold air, and one end of the outside of the pipe body away from the gas injection valve pipe is fixed with a discharge valve pipe for being communicated with the tank body.

[0027] Further, the outer surface of the tank body is designed as a hollow structure, two electrode seats are respectively arranged at two ends of the outside of the tank body, and an electromagnetic coil is arranged between the two electrode seats and coiled on the inner wall of the tank body.

[0028] It should be further noted that the application provides a preparation process of a large-gradient high-coercivity samarium-cobalt material, which can be used in cooperation with the above device, and the process comprises the following steps when used:

[0029] S1. In the batching stage, Sm, Co, La, Re, Al and Nd raw materials are crushed separately and mixed in proportion.

[0030] S2. In the ball milling stage, the obtained mixed powder is screened, and the screened raw material is added to the ball mill for grinding.

[0031] S3, Mixing stage: The ground raw materials and curing agent and template agent in proportion are put into the auger conveyor for mixing;

[0032] S4. Molding process: The mixture is pushed into the mold by the auger conveyor.

[0033] S6. Sintering treatment: Turn off the auger conveyor and turn on the microwave heater to sinter the mixture in the molding die for a period of time. During the sintering process, the template agent is decomposed to generate gas. When the material forms a porous structure, the gas is discharged through the holes on the die and finally discharged from the gas outlet valve.

[0034] S7. Loading process: push the can body to connect the can body with the connecting parts outside the double-headed bottle body, and rotate the threaded sleeve to connect the threaded sleeve with the screw. At this time, the gear plate also meshes with the gear ring.

[0035] S8. Magnetic field treatment: The electromagnetic coil inside the tank is activated, generating a magnetic field inside the tank. After sintering, the molding die passes through the strong magnetic field and is eventually removed from the tank by opening the lid.

[0036] Furthermore, the raw materials appearing in steps S1, S2, and S3 are composed of the following atomic ratios: Sm (12.5–15) parts, Co (62.5–75) parts, La (4.5–6.5) parts, Re (2.5–3.3) parts, Al (2.5–3.3) parts, and Nd (0.03–0.9) parts;

[0037] The mixing ratio of Sm and Co is 1:3 to 5, Al is a low-melting-point metal, and La and Nd are rare earth elements. The atomic ratio between rare earth elements and low-melting-point metal is 1:0.3 to 5.

[0038] Furthermore, the S1 ingredient preparation stage is conducted in a constant room temperature (approximately between 20°C and 25°C) and at normal pressure.

[0039] The ball-to-material ratio in the S2 ball milling stage is 10:1, and this stage is also carried out at room temperature (approximately 20°C to 25°C).

[0040] The S6 sintering process is carried out at 800°C to 1200°C for 4 to 10 hours.

[0041] Furthermore, the template agent is a gaseous template agent, which is used to form pores in the mixture and is released or diffused during sintering. The total ratio of the curing agent and the template agent relative to the total mixing ratio between Sm and Co is 1 to 1.85.

[0042] Furthermore, the present invention can prepare a samarium-cobalt material structure according to the above process, wherein the prepared samarium-cobalt material has a number of channels that penetrate to the surface of the material, and these pores can form a connected network inside the material.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] This high-gradient, high-coercivity samarium-cobalt material preparation process utilizes a modular design for the sintering furnace used to shape the samarium-cobalt material. This allows for flexible installation of a screw conveyor for transporting raw materials and a processing unit for pulling out the sintering furnace's forming components at either end of the furnace. Furthermore, the sintering furnace acts as a connector, enabling linkage between the screw conveyor and the processing unit. Compared to traditional integrated material production lines, this process offers advantages such as modular structure, flexibility, high efficiency, and maintainability, ensuring production efficiency and adapting to different production needs to a certain extent.

[0045] Furthermore, by installing an electromagnetic coil inside the can and electrode holders at both ends outside the can, and connecting the two electrode holders to the battery coil, the interior of the can is equipped with a strong electromagnetic field. This provides the following benefits to the fired samarium-cobalt material when the molded part passes through the strong magnetic field:

[0046] First, improve the coercivity of the material: Strong electromagnetic fields have a directional effect on the magnetic particles in samarium cobalt materials, which can promote the magnetic particles to be arranged more orderly during the sintering process, thus helping to improve the coercivity of the material, that is, the ability of the material to resist changes in magnetization direction under an external magnetic field. It should be noted that improving coercivity can make samarium cobalt materials have better magnetic properties and stability in applications.

[0047] Second, control the magnetic properties of the material: by adjusting the current between the two electrode holders, the parameters of the strong electromagnetic field can be changed, thereby achieving precise control over the magnetic properties of samarium-cobalt material.

[0048] Furthermore, the process provided in this application involves adding a template agent and a curing agent to the raw materials used to prepare samarium cobalt materials. During the heating and curing process, the template agent decomposes, generating gases. The emission of these gases results in a porous structure in the samarium cobalt material. This porous structure offers several advantages over samarium cobalt materials prepared using conventional processes:

[0049] First, higher coercivity: Porous samarium cobalt magnets have more interfaces and grain boundaries, which can increase the storage of magnetization energy and restrict the movement of magnetic domains, thereby improving coercivity.

[0050] Second, a larger magnetic field gradient: porous samarium-cobalt magnets have a higher specific surface area, resulting in more dramatic changes in the local magnetic field. This leads to a larger magnetic field gradient, allowing for stronger magnetic field changes to be generated in a smaller space. Therefore, porous samarium-cobalt magnets exhibit better performance in fields such as sensors and magnetic storage.

[0051] Third, better thermal stability: Due to the smaller grain size and relatively lower grain boundary energy of porous samarium cobalt magnets, the thermal diffusion rate of grain boundaries slows down under high temperature conditions, making the grain boundaries more stable. At the same time, the atoms in porous samarium cobalt magnets have higher thermal activation energy, which increases coercivity and saturation magnetic field, thereby improving the thermal stability of the magnet.

[0052] Fourth, lower domain wall energy: Due to the fine grains and interfaces in the porous samarium cobalt magnet, the movement of domain walls is suppressed and the domain wall energy is reduced. This makes the porous samarium cobalt magnet have lower losses and provide better frequency response characteristics in high-frequency applications. Attached Figure Description

[0053] Figure 1 This is a flowchart of the process of the present invention;

[0054] Figure 2 This is an isometric view of the preparation apparatus of the present invention;

[0055] Figure 3 This is a structural composition diagram of the conveying component of the present invention;

[0056] Figure 4 This is a structural composition diagram of the sintered component of the present invention;

[0057] Figure 5 This is an assembly diagram showing the relationship between the processing component, transmission component, and traction component of the present invention.

[0058] Figure 6 This is a structural composition diagram of the processing component of the present invention;

[0059] Figure 7 This is a structural diagram of the connecting component of the present invention;

[0060] Figure 8 This is a structural composition diagram of the transmission component of the present invention;

[0061] Figure 9 This is a structural composition diagram of the traction component of the present invention;

[0062] Figure 10 This is an open structural diagram of the molded component of the present invention;

[0063] Figure 11 This is a closed structural diagram of the molded component of the present invention.

[0064] In the diagram: 1. Conveying components; 101. Screw conveyor; 102. Support frame; 103. Feed channel; 2. Sintering components; 201. Support seat; 202. Limiting pin block; 203. Gear ring; 204. Exhaust valve pipe; 205. Limiting bracket; 206. Microwave generator heater; 207. External power supply block; 208. Support block; 209. Hydraulic cylinder; 210. Double-headed bottle body; 3. Processing components; 301. Tank body; 302. Electromagnetic coil; 303. Moving seat; 304. Electrode seat; 305. Tank lid; 306. Through port; 4. Connecting components; 401. Cover sleeve; 402. Connecting frame; 403. Groove ring; 404. Stabilizing rod; 405. Transmission rod; 406. 407. Connecting pipe; 5. Locking buckle; 5. Transmission component; 501. Gear disc; 502. First telescopic rod; 503. Transmission block; 504. Guide pin; 505. Pipe body; 506. Guide groove; 507. Second telescopic rod; 508. Air injection valve pipe; 509. Air discharge valve pipe; 510. Transmission disc; 511. Transmission protrusion; 6. Traction component; 601. Stabilizing frame; 602. Force-bearing seat; 603. Threaded sleeve seat; 604. Threaded rod; 605. Transmission wheel; 606. Transmission belt; 607. Drive wheel; 608. Extension rod; 609. Reinforcing seat; 610. Groove disc; 7. Forming component; 701. Screw; 702. Round plate; 703. Forming mold; 704. Buckle. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0066] like Figures 2-11 As shown, the present invention provides a technical solution: a device for preparing samarium cobalt material with high coercivity gradient includes:

[0067] Two connecting parts 4 are connected together, and a detachable double-headed bottle body 210 is installed between the two connecting parts 4. The double-headed bottle body 210 serves as a sintering chamber. The bottle mouths of the double-headed bottle body 210 are respectively located at both ends of the bottle body. An exhaust valve pipe 204 for discharging exhaust gas is fixed to one end of the double-headed bottle body 210. Limiting brackets 205 are fixed to both sides of the inner wall of the double-headed bottle body 210. A movable molding part 7 is sleeved between the two limiting brackets 205. A microwave generator heater 206 is also fixed to the inner wall of the double-headed bottle body 210 and is coiled around the two limiting brackets 205. The microwave generator heater 206 is used to provide heat energy to the inside of the double-headed bottle body 210. An external power supply block 207 for providing electrical energy to the microwave generator heater 206 is fixed to one end of the double-headed bottle body 210. Several limiting pin blocks 202 are evenly distributed with the bottle mouth of the double-headed bottle body 210 as the center at the bottleneck of the double-headed bottle body 210.

[0068] It should be noted that the microwave generator heater 206 is a device that uses microwave radiation to heat objects. It is involved in industrial material processing and is a common heating device at present. Specifically, in this embodiment, the microwave generator heater 206 is a magnetron type microwave generator.

[0069] refer to Figure 7 It is understood that in this application, the connecting component 4 includes:

[0070] The cap 401 is used to seal the mouth of the double-headed bottle 210. The inner side of the cap 401 is fixed with a grooved ring 403 that matches the limiting pin 202. The outer side of the cap 401 is fixed with a through tube 406. A latch 407 is installed between the outer surface of the cap 401 and the outer surface of the double-headed bottle 210.

[0071] It should be noted that the two ends of the double-headed bottle body 210 are respectively equipped with load-bearing seats 201 for placing on the ground. The load-bearing seats 201 include: movable roller seats, support blocks 208 for supporting hydraulic cylinders 209 and increasing the force-bearing area. In addition, there are two hydraulic cylinders 209. The two hydraulic cylinders 209 are respectively fixed at both ends of the top of the roller seats. The tops of the two hydraulic cylinders 209 are fixed to the bottom of the support blocks 208. The top of the support blocks 208 is rotatably connected to the outside of the double-headed bottle body 210.

[0072] In addition, it should be noted that a toothed ring 203 is fixed to one end of the double-headed bottle body 210, and a notch that matches the toothed ring 203 is opened on the top surface of one of the support blocks 208.

[0073] refer to Figure 10As can be seen, in this application, the molding component 7 includes: a screw 701, a circular plate 702 fixed at one end of the screw 701, a molding mold 703 with a hole on its surface installed on the outside of the circular plate 702, the molding mold 703 is composed of two semi-circular ring plates, the two semi-circular ring plates are rotatably connected to the two sides of the outside of the circular plate 702 respectively, and a buckle 704 for closing is installed between the two semi-circular ring plates. It should be noted that the buckle 704 can be fixed to the hole by rotation to limit the two semi-circular ring plates.

[0074] In addition, refer to Figure 2 and Figure 11 It should also be noted that the apparatus in this embodiment further includes:

[0075] Conveying component 1 is used to transport raw materials. The external part of the discharge end of conveying component 1 is rotatably connected to one of the connecting components 4.

[0076] Processing component 3 is used to separate the molding component 7 from the sintering component 2. The exterior of processing component 3 is rotatably connected to the exterior of another connecting component 4.

[0077] pass Figure 3 As can be seen, the conveying component 1 includes a movable auger conveyor 101. Specifically, a support frame 102 with casters is mounted on the bottom of the auger conveyor 101. Furthermore, in this embodiment, the inlet of the auger conveyor 101 is equipped with an inlet channel 103, and the outlet of the auger conveyor 101 is rotatably connected to one end of a through pipe 406. A connecting frame 402 is fixed to the shaft of the auger conveyor 101 through the through pipe 406, wherein the connecting frame 402 and the through pipe 406 are fixed together. It should be noted that in actual manufacturing, a transmission rod 405 can be attached to the back of the connecting frame 402. By fixing the transmission rod 405 to the shaft of the auger conveyor 101, modifications to the auger conveyor 101 are avoided.

[0078] pass Figure 6It is known that the processing component 3 includes: a movable tank 301, wherein a movable seat 303 with casters is installed at the bottom of the tank 301; in addition, in this application, both ends of the tank 301 have openings 306, which are adapted to the through pipe 406; a threaded screw structure is installed inside the tank 301, and a screw 701 is installed at the movable end of the threaded screw structure; a transmission component 5 is installed outside the tank 301, and a linkage is installed between the transmission component 5 and the threaded screw structure; the input end of the transmission component 5 is adapted to the gear ring 203; furthermore, it should be noted that the outer surface of the tank 301 is hollowed out; electrode seats 304 are installed at both ends of the tank 301; an electromagnetic coil 302 is installed between the two electrode seats 304 and wound around the inner wall of the tank 301; in addition, power supply lines are installed outside the two electrode seats 304, and the two power supply lines are installed together outside a battery with an electric valve.

[0079] It should be noted that, in order to enhance the stability of the cap 401, a stabilizing rod 404 is installed on the cap 401 and at a position away from the double-ended bottle body 210. The stabilizing rods 404 at the two positions are rotatably connected to the auger conveyor 101 and the tank body 301, respectively.

[0080] refer to Figure 9 It can be seen that the threaded screw structure includes: a stabilizing frame 601, used to fix the bottom end inside the tank 301; a threaded rod 604 is rotatably connected inside the stabilizing frame 601; the moving end is a force-bearing seat 602; the inside of the force-bearing seat 602 is screwed to the outside of the threaded rod 604; the force-bearing seat 602 and the stabilizing frame 601 are slidably connected; the top of the force-bearing seat 602 is screwed to one end of the screw 701; the linkage includes: a transmission wheel 605 and a drive wheel 607. A transmission belt 606 is fitted between 07. One side of the transmission wheel 605 and one end of the threaded rod 604 passing through the stabilizing frame 601 are fixed together. The drive wheel 607 is set outside the tank body 301. An extension rod 608 is fixed to one side of the drive wheel 607. A reinforcing seat 609 fixed outside the tank body 301 is fitted around the extension rod 608. A grooved plate 610 is fixed to the end of the extension rod 608 away from the drive wheel 607. It should be emphasized that the threaded rod structure and the linkage form the traction component 6.

[0081] refer to Figure 8 It can be seen that the transmission component 5 includes: a pipe body 505, used to fix the middle end of the outer side of the tank body 301; a threaded guide groove 506 is opened inside the pipe body 505; a transmission block 503 is movably connected inside the pipe body 505; a guide pin 504 adapted to the guide groove 506 is fixed outside the transmission block 503; telescopic rods are respectively installed on both sides of the transmission block 503; a gear plate 501 and a transmission plate 510 are respectively fixed at the opposite ends of the two telescopic rods. (Refer to...) Figure 7It can be seen that the two telescopic rods are the first telescopic rod 502 and the second telescopic rod 507, respectively. The first telescopic rod 502 is fixed to the gear plate 501, and the second telescopic rod 507 is fixed to the transmission plate 510. In addition, it should be added that the transmission plate 510 is rotatably connected to the pipe body 505. Several transmission protrusions 511 are fixed on the surface of the transmission plate 510. The transmission protrusions 511 are adapted to the groove plate 610. The gear plate 501 is adapted to the gear ring 203. It should be noted that one end of the pipe body 505 is fixed with an air injection valve pipe 508 for connecting to cold air, and another end of the pipe body 505, away from the air injection valve pipe 508, is fixed with a discharge valve pipe 509 for connecting to the tank body 301.

[0082] It should be noted that the reference is... Figure 1 As can be seen, this embodiment proposes a process method applicable to Embodiment 1, which includes:

[0083] S1. In the batching stage, Sm, Co, La, Re, Al and Nd raw materials are crushed separately and mixed in proportion.

[0084] S2. In the ball milling stage, the obtained mixed powder is screened, and the screened raw material is added to the ball mill for grinding.

[0085] S3, Mixing stage: The ground raw materials and the curing agent and template agent in proportion are put into the auger conveyor 101 for mixing;

[0086] S4. Molding process: The mixture is pushed into the mold 703 by the screw conveyor 101;

[0087] S6. Sintering treatment: Turn off the screw conveyor 101 and turn on the microwave generator heater 206 to sinter the mixture in the molding mold 703 for a period of time. During the sintering process, the template agent is decomposed to generate gas. When the material forms a porous structure, the gas is discharged through the holes on the mold and finally discharged from the gas outlet valve pipe 204.

[0088] S7. Loading process: push the can 301 to connect the can 301 with the connecting part 4 outside the double-headed bottle 210, and rotate the threaded sleeve 603 to connect the threaded sleeve 603 with the screw 701. At this time, the gear plate 501 also meshes with the gear ring 203.

[0089] S8. Magnetic field treatment: The electromagnetic coil 302 inside the tank 301 is activated, generating a magnetic field within the tank 301. The forming mold 703 passes through this strong magnetic field after sintering. Finally, the forming mold 703 is manually removed from the tank 301 by opening the tank lid 305. It should be noted that in actual implementation, a control terminal is installed outside the device. This control terminal controls the opening of the auger conveyor 101, the microwave heater 206, and the electric valves. It should also be noted that at the end of step S7, the auger conveyor 101 needs to be restarted. During operation, the auger conveyor 101 is connected via the connecting frame 402... When the cap 401 rotates, the grooved ring 403 drives the limiting pin block 202 to rotate the double-headed bottle body 210. At this time, the toothed ring 203 and the toothed disc 501 mesh. When the toothed ring 203 rotates, the transmission block 503 will rotate under the action of the guide pin 504 and the guide groove 506 and move toward the position of the transmission disc 510. At this time, the transmission disc 510 rotates and drives the grooved disc 610 to rotate with the help of the transmission protrusion 511. When the grooved disc 610 rotates, it will drive the threaded rod 604 to rotate through the drive wheel 607, the transmission belt 606 and the transmission wheel 605, so that the force seat 602 pulls the forming mold 703 to move with the help of the threaded sleeve seat 603.

[0090] It should be noted that the raw materials appearing in steps S1, S2 and S3 are composed of the following atomic ratios: Sm (12.5-15) parts, Co (62.5-75) parts, La (4.5-6.5) parts, Re (2.5-3.3) parts, Al (2.5-3.3) parts and Nd (0.03-0.9) parts, wherein the mixing ratio of Sm and Co is 1:3-5, Al is a low-melting-point metal, and La and Nd are rare earth elements. The atomic ratio between rare earth elements and low-melting-point metals is 1:0.5-3. The total ratio of curing agent and template agent relative to the total mixing ratio of Sm and Co is 1-1.85, and the raw material ratio between curing agent and template agent is 1:3.

[0091] It should be noted that in this application, the S1 batching stage is carried out at a constant room temperature (approximately between 20°C and 25°C) and normal pressure; the S3 mixing stage and the S4 molding stage are also carried out at room temperature (approximately 20°C to 25°C); the S6 sintering stage is carried out at 800°C to 1200°C for 4 to 10 hours; it should also be noted that the template agent is a gaseous template agent, used to form pores in the mixture and released or diffused during the sintering process.

[0092] It should be added that the samarium cobalt material structure prepared in this application has several channels that extend to the surface of the material, and these pores can form a connected network inside the material.

[0093] Example 1

[0094] In this embodiment, 14 parts of Sm raw material, 70 parts of Co raw material, 5 parts of La raw material, 3 parts of Re raw material, 2.6 parts of Al raw material, 0.85 parts of Nd raw material, and a total of 68 parts of curing agent and template agent were selected, of which 17 parts were curing agent and 51 parts were template agent.

[0095] The specific preparation process is as follows:

[0096] Ingredient preparation stage: Sm, Co, La, Re, Al, and Nd are crushed according to the above-mentioned amounts, and the crushed raw materials are mixed together and put into a sieve for screening;

[0097] Ball milling stage: Ball milling with gasoline as the medium for 3 hours, followed by drying with argon flow after ball milling;

[0098] Mixing stage; The ground raw materials and the above-mentioned amounts of curing agent and template agent are put into the auger conveyor 101 for mixing. The mixture is pushed into the mold 703 by the auger conveyor 101.

[0099] Sintering process: Turn off the screw conveyor 101, turn on the microwave generator heater 206, maintain the temperature inside the double-headed bottle 210 at 1000℃, and sinter for 5 hours to obtain the prepared material.

[0100] Mounting process: Push the can 301 to connect the can 301 with the connecting part 4 outside the double-headed bottle 210, and rotate the threaded sleeve 603 to connect the threaded sleeve 603 with the screw 701. At this time, the gear plate 501 also meshes with the gear ring 203.

[0101] Magnetic field treatment: The electromagnetic coil 302 inside the tank 301 is operated, which generates a magnetic field of 23000 Oe inside the tank 301. After sintering, the forming mold 703 slowly passes through the strong magnetic field. Finally, by closing the auger conveyor 101 and opening the tank cover 305, the forming mold 703 is manually removed from the tank 301 to obtain the treated sintered material.

[0102] Example 2

[0103] In this embodiment, 14 parts of Sm raw material, 70 parts of Co raw material, 5 parts of La raw material, 3 parts of Re raw material, 2.6 parts of Al raw material, 0.85 parts of Nd raw material, and a total of 68 parts of curing agent and template agent were selected, of which 17 parts were curing agent and 51 parts were template agent.

[0104] The specific preparation process is as follows:

[0105] Ingredient preparation stage: Sm, Co, La, Re, Al, and Nd are crushed according to the above-mentioned amounts, and the crushed raw materials are mixed together and put into a sieve for screening;

[0106] Ball milling stage: Ball milling with gasoline as the medium for 3 hours, followed by drying with argon flow after ball milling;

[0107] Mixing stage; The ground raw materials and the above-mentioned amounts of curing agent and template agent are put into the auger conveyor 101 for mixing. The mixture is pushed into the mold 703 by the auger conveyor 101.

[0108] Sintering process: Turn off the auger conveyor 101, turn on the microwave generator heater 206, maintain the temperature inside the double-headed bottle 210 at 1000℃, and sinter for 5 hours to obtain sintered material.

[0109] Example 3

[0110] In this embodiment, 14 parts of Sm raw material, 70 parts of Co raw material, 5 parts of La raw material, 3 parts of Re raw material, 2.6 parts of Al raw material, 0.85 parts of Nd raw material, and a total of 68 parts of curing agent and template agent were selected, of which 17 parts were curing agent and 51 parts were template agent.

[0111] The specific preparation process is as follows:

[0112] Ingredient preparation stage: Sm, Co, La, Re, Al, and Nd are crushed according to the above-mentioned amounts, and the crushed raw materials are mixed together and put into a sieve for screening;

[0113] Ball milling stage: Ball milling with gasoline as the medium for 3 hours, followed by drying with argon flow after ball milling;

[0114] Mixing stage; The ground raw materials and the above-mentioned amounts of curing agent and template agent are put into the auger conveyor 101 for mixing. The mixture is pushed into the mold 703 by the auger conveyor 101.

[0115] Sintering process: Turn off the screw conveyor 101, turn on the microwave generator heater 206, maintain the temperature inside the double-headed bottle 210 at 1000℃, and sinter for 5 hours to obtain the prepared material.

[0116] Mounting process: Push the can 301 to connect the can 301 with the connecting part 4 outside the double-headed bottle 210, and rotate the threaded sleeve 603 to connect the threaded sleeve 603 with the screw 701. At this time, the gear plate 501 also meshes with the gear ring 203.

[0117] Magnetic field treatment: The electromagnetic coil 302 inside the tank 301 is operated to generate a 7000e magnetic field inside the tank 301. After sintering, the forming mold 703 slowly passes through the strong magnetic field. Finally, by closing the auger conveyor 101 and opening the tank cover 305, the forming mold 703 is manually removed from the tank 301 to obtain the treated sintered material.

[0118] Example 4

[0119] In this embodiment, 14 parts of Sm raw material, 70 parts of Co raw material, 5 parts of La raw material, 3 parts of Re raw material, 2.6 parts of Al raw material, and 0.85 parts of Nd raw material were selected.

[0120] The specific preparation process is as follows:

[0121] Ingredient preparation stage: Sm, Co, La, Re, Al, and Nd are crushed according to the above-mentioned amounts, and the crushed raw materials are mixed together and put into a sieve for screening;

[0122] Ball milling stage: Ball milling with gasoline as the medium for 3 hours, followed by drying with argon flow after ball milling;

[0123] Mixing stage; The ground raw materials are fed into the auger conveyor 101 for mixing, and the mixture is pushed into the mold 703 by the auger conveyor 101.

[0124] Sintering process: Turn off the auger conveyor 101, turn on the microwave generator heater 206, maintain the temperature inside the double-headed bottle 210 at 800°C, and sinter for 6 hours to obtain sintered material.

[0125] Comparison,

[0126] Four comparative examples were set up. The steps of each comparative example were the same as those of the corresponding Examples 1-4 above. The only difference was that in Comparative Examples 1-4, no template agent and reinforcing agent were added to the raw materials.

[0127] The sintered samarium-cobalt materials prepared in Examples 1-4 and the comparative examples were subjected to performance tests. It should be noted that the testing equipment used in this application was a magnetic sensor array, a hysteresis loop diagram, a thermogravimetric analyzer, and a hysteresis loop plotter. The performance results obtained are shown in Table 1 below:

[0128] Table 1

[0129]

[0130] As can be seen from Table 1, the samarium cobalt permanent magnet material with channels and passing through the magnetic field obtained in Embodiment 1 of the present invention has a certain degree of improvement in coercivity, magnetic field gradient, thermal expansion coefficient and magnetic domain wall energy compared with the samarium cobalt permanent magnet material without internal channels and without passing through the magnetic field.

[0131] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preparing samarium cobalt materials with high coercivity gradient, characterized in that, include: Sintered component (2), the sintered component (2) comprising: Two connecting parts (4), and a detachable double-headed bottle body (210) is installed between the two connecting parts (4). The double-headed bottle body (210) is used as a sintering chamber. The bottle mouth of the double-headed bottle body (210) is respectively set at both ends of the bottle body. An exhaust valve pipe (204) for discharging exhaust gas is fixed at one end of the double-headed bottle body (210). Limiting brackets (205) are fixed on both sides of the inner wall of the double-headed bottle body (210). A movable molding component (7) is sleeved between the two limiting brackets (205). The inner wall of the double-headed bottle (210) is also fixed with a microwave generator (206) coiled around the outside of two limiting brackets (205). The microwave generator (206) is used to provide heat energy to the inside of the double-headed bottle (210). One end of the double-headed bottle (210) is fixed with an external power supply block (207) for providing electrical energy to the microwave generator (206). Several limiting pin blocks (202) are fixed at the bottleneck of the double-headed bottle (210) with the bottle mouth of the double-headed bottle (210) as the center. The connecting component (4) includes: A cap (401) is used to seal the mouth of the double-ended bottle (210). A grooved ring (403) that matches the limiting pin (202) is fixed on the inner side of the cap (401). A through tube (406) is fixed on the outer side of the cap (401). A latch (407) is installed between the outer surface of the cap (401) and the outer surface of the double-ended bottle (210). The two ends of the double-headed bottle body (210) are respectively equipped with load-bearing seats (201) for placing on the ground. The load-bearing seats (201) include: movable roller seats, hydraulic cylinders (209) for bearing, and support blocks (208) to increase the force-bearing area. Two hydraulic cylinders (209) are provided. The two hydraulic cylinders (209) are fixed at both ends of the top of the roller seat. The top of the two hydraulic cylinders (209) is fixed to the bottom of the support block (208). The top of the support block (208) is rotatably connected to the outside of the double-headed bottle body (210). A toothed ring (203) is fixed to one end of the outside of the double-headed bottle body (210), and a notch adapted to the toothed ring (203) is opened on the top surface of one of the support blocks (208); In addition, a device for preparing high-gradient, high-coercivity samarium-cobalt materials also includes: A conveying component (1) is used to transport raw materials. The outside of the discharge end of the conveying component (1) is rotatably connected to one of the connecting components (4). Processing component (3) is used to separate the molding component (7) from the sintering component (2), and the outside of the processing component (3) is rotatably connected to the outside of another connecting component (4); The conveying component (1) includes: an auger conveyor (101) capable of moving position, an inlet channel (103) installed at the inlet of the auger conveyor (101), an outlet of the auger conveyor (101) rotatably connected to one end of the through pipe (406), and a connecting frame (402) fixed through the through pipe (406) on the shaft of the auger conveyor (101), with the connecting frame (402) and the through pipe (406) fixed together; The processing component (3) includes: a movable tank (301), both ends of the tank (301) have openings (306), the openings (306) are adapted to the through pipe (406), a threaded screw structure is installed inside the tank (301), a threaded rod (604) is installed at the moving end of the threaded screw structure, a transmission component (5) is installed outside the tank (301), a linkage component is installed between the transmission component (5) and the threaded screw structure, and the input end of the transmission component (5) is adapted to the toothed ring (203).

2. The apparatus for preparing high-gradient, high-coercivity samarium-cobalt materials according to claim 1, characterized in that: The molding component (7) includes: a screw (701), a circular plate (702) fixed at one end of the screw (701), a molding mold (703) with holes on its surface installed on the outside of the circular plate (702), the molding mold (703) is composed of two semi-circular ring plates, the two semi-circular ring plates are rotatably connected to the two sides of the outside of the circular plate (702), and a buckle (704) for closing is installed between the two semi-circular ring plates.

3. The apparatus for preparing high-gradient, high-coercivity samarium-cobalt materials according to claim 2, characterized in that: The threaded screw structure includes: a stabilizing frame (601) for fixing to the bottom end inside the tank (301), a threaded rod (604) rotatably connected inside the stabilizing frame (601), and a force-bearing seat (602) for moving end. The inside of the force-bearing seat (602) and the outside of the threaded rod (604) are screwed together. The force-bearing seat (602) and the stabilizing frame (601) are slidably connected. The top of the force-bearing seat (602) is screwed together with one end of the screw (701) through a threaded sleeve (603). The linkage includes: a transmission wheel (605) and a drive wheel (607), a transmission belt (606) is sleeved between the transmission wheel (605) and the drive wheel (607), one side of the transmission wheel (605) and one end of the threaded rod (604) passing through the stabilizing frame (601) are fixed together, the drive wheel (607) is located outside the tank body (301), one side of the drive wheel (607) is fixed with an extension rod (608), the extension rod (608) is sleeved with a reinforcing seat (609) fixed outside the tank body (301), and a grooved plate (610) is fixed at one end of the extension rod (608) away from the drive wheel (607). The transmission component (5) includes: a tube body (505) for fixing at the middle end of the outside of the tank body (301), a threaded guide groove (506) is provided inside the tube body (505), a transmission block (503) is movably connected inside the tube body (505), a guide pin (504) adapted to the guide groove (506) is fixed outside the transmission block (503), telescopic rods are respectively installed on both sides of the transmission block (503), a gear plate (501) and a transmission plate (510) are respectively fixed at the opposite ends of the two telescopic rods, the transmission plate (510) and the tube body (505) are rotatably connected, a number of transmission protrusions (511) are fixed on the surface of the transmission plate (510), the transmission protrusions (511) are adapted to the groove plate (610), and the gear plate (501) is adapted to the gear ring (203).

4. The apparatus for preparing high-gradient, high-coercivity samarium-cobalt materials according to claim 3, characterized in that: One end of the pipe body (505) is fixed with an air injection valve pipe (508) for connecting cold air, and the other end of the pipe body (505) is fixed with a discharge valve pipe (509) for connecting to the tank body (301) at a position away from the air injection valve pipe (508).

5. The apparatus for preparing high-gradient, high-coercivity samarium-cobalt materials according to claim 4, characterized in that: The outer surface of the tank (301) is hollowed out. Electrode seats (304) are installed at both ends of the tank (301), and an electromagnetic coil (302) is installed between the two electrode seats (304) and coiled on the inner wall of the tank (301).

6. A process for producing a high-gradient, high-coercivity samarium-cobalt material, characterized in that: This process is used in conjunction with the high-gradient, high-coercivity samarium-cobalt material preparation apparatus described in claim 5, and its use includes the following steps: S1. In the batching stage, Sm, Co, La, Re, Al and Nd raw materials are crushed separately and mixed in proportion. S2. In the ball milling stage, the obtained mixed powder is screened, and the screened raw material is added to the ball mill for grinding. S3, Mixing stage: The ground raw materials and the curing agent and template agent in proportion are put into the screw conveyor (101) for mixing; S4. Molding process: The mixture is filled into the mold (703) by the push of the screw conveyor (101); S5. Sintering treatment: shut down the screw conveyor (101), turn on the microwave generator heater (206), and sinter the mixture in the molding die (703) for a period of time. During the sintering process, the template agent is decomposed to generate gas. When the material forms a porous structure, the gas is discharged through the holes on the die and finally discharged from the gas outlet valve pipe (204). S6. Loading process: push the can (301) to connect the can (301) and the connecting part (4) outside the double-headed bottle (210), and rotate the threaded sleeve (603) to connect the threaded sleeve (603) and the screw (701). At this time, the gear plate (501) also meshes with the gear ring (203). S7. Magnetic field treatment: the electromagnetic coil (302) inside the tank (301) is operated, so that a magnetic field is generated inside the tank (301). After sintering, the molding die (703) passes through the strong magnetic field. Finally, the molding die (703) is removed from the tank (301) by opening the tank lid (305).

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