Preparation method of high-performance ferrite tile based on mes system and product

Abstract

The application discloses a kind of preparation method and product of high-performance ferrite magnetic tile based on MES system, belong to magnetic tile production technical field.The method includes steps: S1, ball milling process;S2, green compact pressing process;S3, sintering process: blank is put into program-controlled box furnace and is sintered, and its sintering temperature is from 200 DEG C to 1190 DEG C±20 DEG C, and sintering time is 2-3h;S4, grinding process;S5, drying deburring process: the ferrite magnetic tile obtained by grinding is cleaned and dried, and surface residual moisture is removed;Then vibration disc and abrasive are used to process the dried ferrite magnetic tile, and the abrasive is inorganic material with Mohs hardness not more than 5 and particle size of 0.5-1.0mm.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of magnetic tile production, and more particularly relates to a preparation method of high-performance ferrite magnetic tile based on an MES system and a product. BACKGROUND

[0002] Permanent magnet ferrite tile is an important component of a motor. Unlike an electromagnetic motor which generates a magnetic potential source through an excitation coil, a permanent magnet motor generates a constant magnetic potential source by using a permanent magnet material. Therefore, the permanent magnet ferrite tile has the advantages of simple motor structure, convenient maintenance, light weight, small size, reliable use, less copper, low copper consumption, low energy consumption, etc. The permanent magnet ferrite tile is widely used on a car. With the improvement of people's living standards, the use of starting motor magnetic tiles on cars has also increased significantly.

[0003] At present, after the ferrite magnetic tile completes the pressing forming and sintering process, it enters the grinding process. The grinding process steps of the magnetic tile include: 1) grinding the two end faces of the shaft length with a double-end face grinder; 2) grinding the chord width and bottom plane of the magnetic tile with a single-station grinder; 3) grinding the inner and outer circular arc chamfers of the two end faces of the shaft length with a four-station automatic chamfer grinder; 4) coarsely grinding the inner and outer arcs of the magnetic tile with a double-station through-type tile-shaped magnet grinder; 5) finely grinding the inner arc of the magnetic tile with a single-station through-type tile-shaped magnet grinder; 6) finely grinding the outer arc of the magnetic tile with a single-station through-type tile-shaped magnet grinder; and 7) turning a 4R angle on the magnetic tile product.

[0004] However, the magnetic tile after fine grinding needs to be polished again because the surface of the fine grinding wheel is relatively rough.

[0005] After searching, patent document 1: Chinese patent CN212170033U discloses a spiral vibration polishing device for ferrite magnetic tile processing, which comprises a polishing device, a stable plate is fixedly welded outside the polishing device, a connecting buckle is fixedly connected to the outer surface of the stable plate, a limiting rod is fixedly connected to the outside of the connecting buckle, an oscillating spring rod is fixedly connected to the bottom of the polishing device, and a bottom support table is fixedly installed at the bottom of the oscillating spring rod. According to the structure disclosed in the patent, the polishing and grinding are realized by the mutual collision between the vertical arc-shaped abrasive, the inclined abrasive and the magnetic tile. It is found in the field that the roughness of the magnetic tile profile is still high (some burrs exist), which cannot meet the requirements of the magnetic tile profile for high requirements.

[0006] Patent document 2: Chinese patent CN115390534A discloses a permanent magnet ferrite full life cycle management system and method based on digital twinning, including a permanent magnet ferrite digital twinning production line system, the permanent magnet ferrite digital twinning production line system and the permanent magnet ferrite digital twinning workshop system are connected through a network, including workshop production tasks, manufacturing resources, production capacity, logistics path, inventory situation, thereby effectively driving each level in the digital space, simulating and analyzing the operation of the workshop based on real-time feedback data from the production site in the production line virtual simulation environment, according to the virtual simulation result, the digital twinning workshop system will timely formulate production strategies, resource scheduling workshop control instructions and input MES system. The content disclosed in this patent only relates to the MES system, and does not describe the production process of the MES system in detail. SUMMARY

[0007] 1. Problem to be solved

[0008] In view of the problems existing in the prior art, the present application provides a preparation method of high-performance ferrite magnetic tile based on MES system, which can effectively remove the tiny burrs generated at the edge of the magnetic tile due to grinding, and meet the use requirements of the magnetic tile.

[0009] Another object of the present application is to provide a product obtained by the preparation method of high-performance ferrite magnetic tile based on MES system.

[0010] 2. Technical solution

[0011] In order to solve the above problems, the technical solution adopted by the present application is as follows:

[0012] The first aspect of the present application provides a preparation method of high-performance ferrite magnetic tile based on MES system, comprising the following steps:

[0013] S1, ball milling process: using a horizontal ball mill to obtain particles of a specified particle size, then discharging, and controlling the water content of the mixed material at 30-40wt%;

[0014] S2, green compact pressing process: pressing the slurry in S1 into a blank, the forming magnetic field is 850-950 kA / m and parallel to the pressing direction, and the pressing pressure is 400-500 MPa;

[0015] S3, sintering process: the blank is put into a program-controlled box furnace for sintering, the sintering temperature is raised from 200℃ to 1190℃±20℃, and the sintering time is 2-3 h;

[0016] S4, grinding process: grinding the two end faces of the shaft length, the chord width and the bottom plane, the inner and outer circular arc chamfers of the two end faces of the shaft length of the ferrite magnetic tile rough product obtained in S3, coarsely grinding the inner and outer arcs of the magnetic tile, finely grinding the inner arc of the magnetic tile and finely grinding the outer arc of the magnetic tile;

[0017] S5, a drying deburring process: the iron oxide magnetic tile obtained by grinding is cleaned and dried (temperature is 100-150 DEG C) to remove the residual moisture on the surface; then the dried iron oxide magnetic tile is treated by using a vibrating disc and a grinding material, the grinding material is an inorganic material with Mohs hardness not more than 5 and particle size of 0.5-1.0 mm, and the above inorganic material can effectively remove the tiny burrs on the edge of the magnetic tile due to grinding.

[0018] According to any embodiment of the first aspect of the present application, the inorganic material is selected from BaSO4, CaSiO4, CaSiO3 or γ-AlOOH.

[0019] According to any embodiment of the first aspect of the present application, the weight ratio of the material in the ball milling process is ball: material: water = 15:1:2, the rotation speed is 80-100 r / min, and the ball milling time is 12-16 h.

[0020] According to any embodiment of the first aspect of the present application, the average particle size is tested by using a Fisher average particle size tester, and the particle size of the slurry is controlled in the range of 0.5-0.8 μm.

[0021] According to any embodiment of the first aspect of the present application, the adding amount of the grinding material is 0.5 kg / 10 kg to 0.8 kg / 10 kg of the iron oxide magnetic tile.

[0022] According to any embodiment of the first aspect of the present application, the drying deburring process uses an ultrasonic cleaning dryer, which comprises an ultrasonic cleaning part and a hot air drying part, the ultrasonic cleaning part comprises a water tank, an ultrasonic transmitter and a chain plate, the ultrasonic transmitter is arranged on both sides of the water tank, and the chain plate is arranged in the water tank; the hot air drying part comprises a hot air pipe and a drying chamber, the hot air pipe is arranged around the upper part of the drying chamber, and the chain plate passes through the drying chamber.

[0023] The second aspect of the present application provides a product obtained by the preparation method of the high-performance iron oxide magnetic tile based on the MES system of the first aspect, and the magnetic properties Br can reach 460 mT, Hcb can reach 340 kA / m, Hcj can reach 392 kA / m, and (BH)max can reach 39.4 kJ / m 3 .

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the beneficial effects of the present application are:

[0026] (1) The preparation method of high-performance ferrite magnetic tile based on the MES system can effectively remove the tiny burrs generated on the edge of the magnetic tile due to grinding by using abrasive material with Mohs hardness not more than 5, and meets the use requirements of the magnetic tile;

[0027] (2) In the subsequent ferrite magnetic tile assembly and performance test process, the performance of the ferrite magnetic tile treated by the abrasive material is improved (compared with other abrasive material treatments, such as the magnetic tile obtained in patent document 1), especially the components of the permanent magnet motor composed of multiple magnetic tiles, under the premise that the volume does not change and is not subjected to other treatments, the eddy current loss of the permanent magnet motor at high frequency is reduced by about 0.05-0.08%. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present application are described in detail below. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the application, it should be understood that other embodiments can be realized and that various changes can be made to the embodiments described herein without departing from the spirit and scope of the present application. The detailed description of the embodiments of the present application herein below is not intended to limit the scope of the claimed application, but merely to provide examples to illustrate the features and characteristics of the present application, to propose the best mode for carrying out the present application, and to enable those skilled in the art to practice the present application. Therefore, the scope of the present application is only limited by the appended claims.

[0029] The raw materials used in the present application are purchased from the market unless otherwise specified.

[0030] Preparation method of high-performance ferrite magnetic tile based on MES system

[0031] The method of the present application comprises the following steps:

[0032] S1, ball milling process: a horizontal ball mill is used to obtain particles of a specified particle size, and then the mixed material is discharged, and the water content of the mixed material is controlled at 30-40wt%; the weight ratio of the material in the ball milling process is ball: material: water = 15:1:2, the rotation speed is 80-100 r / min, and the ball milling time is 12-16 h; the average particle size is tested by a Fisher average particle size tester, and the slurry particle size is controlled at 0.5-0.8 μm, specifically 0.5 μm, 0.6 μm, 0.7 μm and 0.8 μm;

[0033] S2, green compact pressing process: the slurry in S1 is pressed into a blank, the forming magnetic field is 850-950 kA / m and parallel to the pressing direction, and the pressing pressure is 400-500 MPa;

[0034] S3, sintering process: the blank is put into a program-controlled box furnace for sintering, the sintering temperature is raised from 200 DEG C to 1190 DEG C ± 20 DEG C, and the sintering time is 2-3 h;

[0035] S4, grinding process: the ferrite magnetic tile rough product obtained in S3 is ground to the length of the two end faces, the chord width and the bottom plane, the inner and outer circular arc chamfers of the length of the two end faces, the rough grinding of the inner and outer arcs of the magnetic tile, the fine grinding of the inner arc of the magnetic tile and the fine grinding of the outer arc of the magnetic tile;

[0036] S5, drying and deburring process: the ferrite magnetic tile obtained by grinding is cleaned and dried (temperature is 100-150 DEG C) to remove the surface residual moisture; then the dried ferrite magnetic tile is treated with a vibrating disc (such as Xifuyaye SINFONIA vibrating disc direct vibration feeder) and abrasive, the abrasive is an inorganic material with Mohs hardness not more than 5 and particle size of 0.5-1.0 mm, specifically 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm and 1.0 mm, and the inorganic material is selected from BaSO4, CaSiO4, CaSiO3 or γ-AlOOH; the addition amount of the abrasive is 0.5 kg / 10 kg-0.8 kg / 10 kg ferrite magnetic tile, specifically 0.5 kg / 10 kg, 0.5 kg / 10 kg, 0.6 kg / 10 kg, 0.65 kg / 10 kg, 0.7 kg / 10 kg, 0.8 kg / 10 kg; the above inorganic material can effectively remove the tiny burrs generated on the edge of the magnetic tile due to grinding.

[0037] The drying and deburring process of the application can use an ultrasonic cleaning and drying machine, which comprises an ultrasonic cleaning part and a hot air drying part, the ultrasonic cleaning part comprises a water tank, an ultrasonic transmitter and a chain plate, the ultrasonic transmitter is placed on both sides of the water tank, and the chain plate is placed in the water tank; the hot air drying part comprises a hot air pipe and a drying chamber, the hot air pipe is placed around the upper part of the drying chamber, and the chain plate passes through the drying chamber.

[0038] The addition amount of the abrasive is 0.5 kg / 10 kg-0.8 kg / 10 kg ferrite magnetic tile, and the abrasive with Mohs hardness not more than 5 can effectively remove the tiny burrs generated on the edge of the magnetic tile due to grinding, meeting the use requirements of the magnetic tile. However, the inventors surprisingly found that in the subsequent performance test process of the ferrite magnetic tile assembly, the performance of the ferrite magnetic tile treated by the abrasive was improved (compared with the magnetic tile obtained in the patent document 1), especially the components of the permanent magnet motor composed of multiple magnetic tiles, under the premise that the volume did not change and no other treatment was carried out, the eddy current loss of the permanent magnet motor at high frequency was reduced by about 0.05-0.08%.

[0039] The inventor believes that the possible reason is that the hardness of the small particle abrasive does not exceed the hardness of the magnetic tile itself (the hardness after sintering is relatively high, generally about 8 or even higher), the abrasive is subjected to vibration, continuous extrusion and friction of the magnetic tile, and the small burrs (small burrs observed under a microscope are part of the protrusions) are polished; at the same time, the above-mentioned abrasive is extruded and polished to generate small particles, and the particles of these materials have good insulating properties, which adhere to the surface of the ferrite magnetic tile, or even partially enter the surface holes, forming an effective insulating layer between the ferrite magnetic tiles, improving the resistance of the magnetic tile, and effectively reducing the eddy current loss at high frequency.

[0040]

High-performance ferrite magnetic tile

[0041] The high-performance ferrite magnetic tile prepared by the above method has a magnetic property Br of 460 mT, a Hcb of 340 kA / m, a Hcj of 392 kA / m, and a (BH)max of 39.4 kJ / m 3 .

[0042] Example 1

[0043] The preparation method of the high-performance ferrite magnetic tile based on the MES system of the present embodiment includes the following steps:

[0044] S1, ball milling process: a horizontal ball mill is used to mill to obtain particles of a specified particle size, and then the mixed material is discharged, and the water content of the mixed material is controlled at 30wt%; the weight ratio of the material in the ball milling process is ball: material: water = 15:1:2, the rotation speed is 80 r / min, and the ball milling time is 16 h; the average particle size is tested by a Fisher average particle size tester, and the particle size of the slurry particles is controlled at 0.8 μm;

[0045] S2, green body pressing process: the slurry in S1 is pressed into a blank, the forming magnetic field is 950 kA / m and parallel to the pressing direction, and the pressing pressure is 400 MPa;

[0046] S3, sintering process: the blank is placed in a programmed box furnace for sintering, the sintering temperature is raised from 200℃ to 1190℃±20℃, and the sintering time is 3 h;

[0047] S4, grinding process: the ferrite magnetic tile rough product obtained by sintering in S3 is ground to the length of the two end faces, the chord width and the bottom plane, the inner and outer circular arc chamfers of the length of the two end faces, the coarse grinding of the inner and outer arcs of the magnetic tile, the fine grinding of the inner arc of the magnetic tile and the fine grinding of the outer arc of the magnetic tile;

[0048] S5, drying and deburring process: the iron oxide magnetic tile obtained by grinding is cleaned and dried (temperature is 150 DEG C) treatment, to remove the surface residual moisture; then using the vibration disc and abrasive to the dried iron oxide magnetic tile processing, the abrasive is BaSO4 with Mohs hardness not more than 5 and particle size of 0.5 mm.

[0049] Example 2

[0050] The preparation method of high-performance ferrite magnetic tile based on MES system of the embodiment comprises the steps of:

[0051] S1, ball milling process: the specified particle size particles are obtained by using horizontal ball mill, then the mixed material is discharged, and the water content of the mixed material is controlled to be 40wt%; the weight ratio of the material in the ball milling process is ball: material: water = 15:1:2, the rotating speed is 100 r / min, and the ball milling time is 12 h; the average particle size is tested by using Fisher average particle size tester, and the particle size of the slurry is controlled to be 0.5 μm;

[0052] S2, green compact pressing process: the slurry in S1 is pressed into a blank, the forming magnetic field is 900 kA / m and parallel to the pressing direction, and the pressing pressure is 450 MPa;

[0053] S3, sintering process: the blank is put into a programmed box furnace for sintering, the sintering temperature is increased from 200 DEG C to 1190 DEG C ± 20 DEG C, and the sintering time is 2.5 h;

[0054] S4, grinding process: the iron oxide magnetic tile obtained by sintering in S3 is ground to have the axial length two end faces, chord width and bottom plane, axial length two end face inner and outer arc chamfer, coarse grinding of the inner and outer arc of the magnetic tile, fine grinding of the inner arc of the magnetic tile and fine grinding of the outer arc of the magnetic tile;

[0055] S5, drying and deburring process: the iron oxide magnetic tile obtained by grinding is cleaned and dried (temperature is 100 DEG C) treatment, to remove the surface residual moisture; then using the vibration disc and abrasive to the dried iron oxide magnetic tile processing, the abrasive is BaSO4 with Mohs hardness not more than 5 and particle size of 1.0 mm.

[0056] Example 3

[0057] The preparation method of high-performance ferrite magnetic tile based on MES system of the embodiment comprises the steps of:

[0058] S1, ball milling process: the specified particle size particles are obtained by using horizontal ball mill, then the mixed material is discharged, and the water content of the mixed material is controlled to be 40wt%; the weight ratio of the material in the ball milling process is ball: material: water = 15:1:2, the rotating speed is 100 r / min, and the ball milling time is 12 h; the average particle size is tested by using Fisher average particle size tester, and the particle size of the slurry is controlled to be 0.5 μm;

[0059] S2, a green compact pressing process: the slurry in S1 is pressed into a blank, the forming magnetic field is 850 kA / m and parallel to the pressing direction, and the pressing pressure is 500 MPa;

[0060] S3, a sintering process: the blank is put into a program-controlled box furnace for sintering, the sintering temperature is raised from 200°C to 1190°C±20°C, and the sintering time is 2.5h;

[0061] S4, a grinding process: the ferrite magnetic tile rough product obtained by sintering in S3 is ground to the axial length two end faces, chord width and bottom plane, and the inner and outer circular arc chamfers of the axial length two end faces, the rough grinding of the inner and outer arcs of the magnetic tile, the fine grinding of the inner arc of the magnetic tile and the fine grinding of the outer arc of the magnetic tile;

[0062] S5, a drying and deburring process: the ferrite magnetic tile obtained by grinding is cleaned and dried (temperature is 130°C) to remove the surface residual moisture; then the dried ferrite magnetic tile is treated by using a vibration disc and abrasive, the abrasive is CaSiO4 with Mohs hardness not more than 5 and particle size of 0.8mm.

[0063] Example 4

[0064] The preparation method of the high-performance ferrite magnetic tile based on the MES system of the present embodiment comprises the following steps:

[0065] S1, a ball milling process: a horizontal ball mill is used to obtain particles of a specified particle size, and then the mixed material is discharged, and the water content of the mixed material is controlled to be 30wt%; in the ball milling process, the weight ratio of the material is ball: material: water = 15:1:2, the rotation speed is 90 r / min, and the ball milling time is 14h; the average particle size is tested by using a Fisher average particle size tester, and the particle size of the slurry particles is controlled to be 0.7μm;

[0066] S2, a green compact pressing process: the slurry in S1 is pressed into a blank, the forming magnetic field is 890 kA / m and parallel to the pressing direction, and the pressing pressure is 480 MPa;

[0067] S3, a sintering process: the blank is put into a program-controlled box furnace for sintering, the sintering temperature is raised from 200°C to 1190°C±20°C, and the sintering time is 2-3h;

[0068] S4, a grinding process: the ferrite magnetic tile rough product obtained by sintering in S3 is ground to the axial length two end faces, chord width and bottom plane, and the inner and outer circular arc chamfers of the axial length two end faces, the rough grinding of the inner and outer arcs of the magnetic tile, the fine grinding of the inner arc of the magnetic tile and the fine grinding of the outer arc of the magnetic tile;

[0069] S5, drying deburring process: the iron oxide magnetic tile obtained by grinding is cleaned and dried (temperature is 140 DEG C) treatment, to remove the surface residual moisture; then the vibrating disc and grinding material is used to treat the dried iron oxide magnetic tile, the grinding material is CaSiO3 with Mohs hardness not more than 5 and particle size of 0.6 mm.

[0070] Example 5

[0071] The preparation method of high-performance ferrite magnetic tile based on MES system of the embodiment includes the following steps:

[0072] S1, ball milling process: a horizontal ball mill is used to obtain particles with a specified particle size, and then the mixed material is discharged, and the water content of the mixed material is controlled at 40wt%; the weight ratio of the material in the ball milling process is ball: material: water = 15:1:2, the rotation speed is 100 r / min, and the ball milling time is 16 h; the average particle size is tested by Fisher average particle size tester, and the particle size of the slurry particles is controlled at 0.8 μm;

[0073] S2, green compact pressing process: the slurry in S1 is pressed into a blank, the forming magnetic field is 950 kA / m and parallel to the pressing direction, and the pressing pressure is 500 MPa;

[0074] S3, sintering process: the blank is put into a programmed box furnace for sintering, the sintering temperature is raised from 200 DEG C to 1190 DEG C ± 20 DEG C, and the sintering time is 2h;

[0075] S4, grinding process: the iron oxide magnetic tile obtained by sintering in S3 is ground to the length of the two ends of the shaft, the width of the chord and the bottom plane, the inner and outer circular arc chamfer of the two ends of the shaft, the coarse grinding of the inner and outer arc of the magnetic tile, the fine grinding of the inner arc of the magnetic tile and the fine grinding of the outer arc of the magnetic tile;

[0076] S5, drying deburring process: the iron oxide magnetic tile obtained by grinding is cleaned and dried (temperature is 150 DEG C) treatment, to remove the surface residual moisture; then the vibrating disc and grinding material is used to treat the dried iron oxide magnetic tile, the grinding material is CaSiO3 with Mohs hardness not more than 5 and particle size of 1.0 mm.

[0077] It should be stated that the above specific embodiments are intended to prove the practical application of the present application, and are not limited to the protection scope of the present application. Those skilled in the art can make various modifications, replacements or improvements within the spirit and principles of the present application. The protection scope of the present application is subject to the appended claims.

Claims

1. A method for fabricating high-performance ferrite magnetic tiles based on a MES system, characterized in that, Including the following steps: S1. Ball milling process: A horizontal ball mill is used to mill the mixture to obtain particles of the specified size, which are then discharged. The moisture content of the mixture is controlled at 30-40 wt%. S2, pressing green body process: pressing the slurry in S1 into a green body, the forming magnetic field is 850-950 kA / m and parallel to the pressing direction, and the pressing pressure is 400-500 MPa. S3. Sintering process: The blank is placed in a programmable box furnace for sintering. The sintering temperature is raised from 200℃ to 1190℃±20℃ and the sintering time is 2-3 hours. S4. Grinding process: Grind the rough ferrite magnetic tile obtained by S3 sintering, including the two end faces of the shaft length, the chord width and the bottom plane, and the inner and outer arc chamfers of the two end faces of the shaft length. Roughly grind the inner and outer arcs of the magnetic tile, and finely grind the inner and outer arcs of the magnetic tile. S5. Drying and deburring process: The ferrite magnetic tiles obtained by grinding are cleaned and dried to remove residual moisture from the surface; then, the dried ferrite magnetic tiles are processed by a vibratory plate and abrasive material, wherein the abrasive material is an inorganic material with a Mohs hardness of no more than 5 and a particle size of 0.5-1.0 mm.

2. The method for preparing high-performance ferrite magnetic tiles based on a MES system according to claim 1, characterized in that, The inorganic material is selected from BaSO4, CaSiO4, CaSiO3 or γ-AlOOH.

3. The method for preparing high-performance ferrite magnetic tiles based on a MES system according to claim 1, characterized in that, In the ball milling process, the material weight ratio is ball:material:water = 15:1:2, the rotation speed is 80-100 r / min, and the ball milling time is 12-16h.

4. The method for preparing high-performance ferrite magnetic tiles based on a MES system according to claim 2, characterized in that, The average particle size was measured using a Fisher average particle size analyzer, and the particle size of the slurry was controlled within 0.5-0.8 μm.

5. The method for preparing high-performance ferrite magnetic tiles based on a MES system according to claim 3, characterized in that, The amount of abrasive added is 0.5kg / 10kg-0.8kg / 10kg of ferrite magnet.

6. The method for preparing high-performance ferrite magnetic tiles based on a MES system according to claim 1, characterized in that, The drying and deburring process uses an ultrasonic cleaning and drying machine, which includes an ultrasonic cleaning section and a hot air drying section. The ultrasonic cleaning section includes a water tank, an ultrasonic transmitter, and a chain plate. The ultrasonic transmitter is placed on both sides of the water tank, and the chain plate is placed in the water tank. The hot air drying section includes a hot air pipe and a drying chamber. The hot air pipe is placed around the upper part of the drying chamber, and the chain plate passes through the drying chamber.

7. A product obtained by the method for preparing high-performance ferrite magnetic tiles based on a MES system as described in any one of claims 1 to 6, wherein the magnetic properties Br reach 460 mT, Hcb reach 340 kA / m, Hcj reach 392 kA / m, and BHmax reach 39.4 kJ / m. 3 .