11 results about "Magnetic stability" patented technology

The invention relates to the technical field of soft magnetic materials, and discloses a soft magnetic composite material, a preparation method thereof and a magnetic element, and the preparation method of the soft magnetic composite material comprises the following steps: dissolving an iron source, a silicon source and a complexing agent in a first solvent to obtain sol; soft magnetic particles are dispersed in the sol, aging and first sintering are sequentially carried out on the sol, the first sintering is carried out in a reducing atmosphere, a coating layer coating at least part of the surface of the soft magnetic particles is generated, and the coating layer comprises Fe2SiO4. The coating layer comprises Fe2SiO4, so that the insulating property and the magnetism of the soft magnetic composite material are balanced, the soft magnetic composite material has high insulating property and magnetism, the structural stability and the magnetic stability of the soft magnetic composite material are improved, and the soft magnetic composite material is suitable for a wider temperature range.

This invention discloses a Cr-rich multiphase hexa-element non-noble metal high-entropy alloy and its preparation method, belonging to the field of magnetic high-entropy alloy technology. Preparation raw materials: Cr 65-70 at.%, Fe 1-5 at.%, Co 1-5 at.%, Ni 1-5 at.%, Al 10-15 at.%, and Mo 10-15 at.%, totaling 100 at.%. Preparation method: (1) Mix the raw materials evenly; (2) Continuously introduce argon gas; (3) Heat at a uniform rate, simultaneously increasing the argon gas flow rate, maintain at 1200℃ for 16 hours, and then reduce the argon gas flow rate; (4) Cool at a uniform rate, simultaneously increasing the argon gas flow rate, maintain at 900℃ for 10 hours, and then reduce the argon gas flow rate; (5) Cool at a uniform rate, maintaining the argon gas flow rate and rapidly cooling to room temperature, thus obtaining the alloy. This invention achieves a high Curie temperature Ti at low cost by combining a precise doping strategy of hexa-element non-noble metal elements with one-step heat treatment and a staged rapid cooling process. c With low saturation magnetization M s The coordinated regulation of these technologies effectively overcomes key bottlenecks such as high magnetic loss and poor magnetic stability in traditional magnetic materials, providing a material basis for the development of next-generation high-frequency and high-temperature magnetic devices.

The application provides a neodymium-iron-boron magnet with high magnetic stability, a manufacturing method and application thereof. The neodymium-iron-boron magnet has a three-dimensional structure, which comprises a length direction, a pressing direction and an orientation direction; and the orientation deviation angle of the neodymium-iron-boron magnet is less than or equal to 1°. The neodymium-iron-boron magnet and the manufacturing method can effectively improve the magnetic stability of the magnet.

The invention discloses a method for improving the performance of a bonded neodymium-iron-boron magnet, and relates to the technical field of bonded neodymium-iron-boron magnets, and the method comprises the following operation steps: S1, raw material preparation: selecting a bonded neodymium-iron-boron magnet blank with the density of 6.0-6.5 g / cm < 3 > and the particle size distribution of 20-200 [mu] m; s2, first-time pretreatment, wherein mechanical polishing and plasma activation are included, and after mechanical polishing, the surface roughness Ra of the magnet reaches 0.8-1.2 [mu] m; according to the method for improving the performance of the bonded neodymium-iron-boron magnet, a four-layer composite protection system of an internal infiltration layer, a transition coating, a passive film and an outer anti-corrosion layer is constructed, and precise treatment of all process links is combined, so that synchronous optimization of the density, the anti-corrosion performance, the solvent resistance and the magnetic performance stability of the magnet is achieved; the comprehensive service performance of the magnet is comprehensively improved from structure to function, and the service life of the magnet in a complex environment is effectively prolonged.

This invention relates to a satellite magnetic stability control method for on-orbit operating mode switching, belonging to the field of satellite magnetic stability control; it includes the following steps: Step 1, magnetic design of individual equipment; Step 2, measurement of magnetic moment change of individual equipment using the method of measuring the magnetic moment after demagnetization under zero magnetic field; Step 3, magnetic testing and magnetic compensation calibration of each individual equipment under each satellite operating mode; by reducing the magnetic moment change of individual equipment during satellite operating mode switching, the magnetic stability of the entire satellite is ensured during operating mode switching, so that the magnetic moment change of the entire satellite is minimized, thereby reducing the impact of satellite operating mode switching on in-situ magnetic field measurement tasks; this invention has the advantages of good control effect and high control accuracy for satellite magnetic control.

The invention discloses a normalizing method for improving the HiB hit rate of low-temperature high-magnetic-induction oriented silicon steel, and belongs to the technical field of high-magnetic-induction oriented silicon steel. By controlling the normalizing annealing and cooling process of the low-temperature high-magnetic-induction oriented silicon steel, particularly controlling the normalizing temperature and cooling rate of the strip steel according to the contents of Si, Al and N in the steel, and reasonably controlling the normalizing time, the number and size of effective inhibitors which are subjected to solid solution and precipitation in the normalizing process of the steel plate are adjusted, the primary grain size is improved, and the inhibiting force is improved; the magnetic performance, especially the magnetic induction intensity, of the finished low-temperature high-magnetic-induction oriented silicon steel is stabilized, and it is guaranteed that the hit rate of HiB of hot rolled plates with different components reaches 100%; meanwhile, the magnetic stability of the strip head and the strip tail of the steel coil in the length direction is improved, and important application prospects are achieved.

The application discloses an inverse-magnetic ultra-thin tellurite glass as well as a preparation method and application thereof, and belongs to the technical field of tellurite glass. The molten glass liquid is drawn out from a slit opening in the middle of a side wall of a smelting furnace by using a melting-annealing method. The middle of the side wall of the smelting furnace is at a position with a distance of 1 / 2 of the height of the furnace body from the bottom. The height of the slit opening is 2.0 mm, the width of the slit opening is 600 mm, and the inclination angle of the slit opening is 45 DEG. The ultra-thin tellurite glass with a thickness of about 5 microns can be obtained by opening the slit opening in the middle of the smelting furnace and drawing the molten glass liquid out by using a drawing device, and the mechanical strength and the inverse-magnetic stability of the tellurite glass can be effectively improved.

The invention provides a magnetic topological insulator heterojunction material and a synthesis method thereof, and relates to the technical field of topological insulator heterojunction materials. The magnetic topological insulator heterojunction material adopts a four-layer composite structure of a magnetic buffer layer, an interface modification layer, a topological insulator layer and a magnetic covering layer, a room-temperature ferromagnetic material Fe3O4 is taken as a magnetic functional layer, (Bi0. 8Sb0. 2) 2Se3 is taken as a topological insulating layer, and lattice matching and defect passivation are realized through an Al2O3 interface modification layer; secondly, the synthesis method is combined with magnetron sputtering, atomic layer deposition and pulse laser deposition technologies, and is matched with a step-by-step annealing process, so that the problems of insufficient magnetic stability, serious interface diffusion and low spin conversion efficiency in the prior art are solved. The Curie temperature of the heterojunction reaches more than 350K, the spin Hall angle is higher than 1.0, and the heterojunction can be used in the fields of diodes and topological quantum computing.

The present application relates to a structure design method and apparatus for a permanent-magnet rotor, a permanent-magnet rotor, a computer device, a storage medium, and a computer program product. The method comprises: acquiring stress distribution information of a permanent-magnet rotor which has an initial structure; on the basis of the stress distribution information, adjusting the geometry of the permanent-magnet rotor which has the initial structure, so as to obtain a permanent-magnet rotor which has an adjusted structure; and on the basis of magnetic force information of the permanent-magnet rotor which has the adjusted structure, adjusting the magnetic field distribution of the permanent-magnet rotor which has the adjusted structure, so as to obtain a permanent-magnet rotor which has a target structure, wherein the mechanical load bearing capacity and operating speed bearing capacity of the permanent-magnet rotor which has the target structure are higher than the mechanical load bearing capacity and operating speed bearing capacity of the permanent-magnet rotor which has the initial structure. By using the method, the optimization of material mechanical properties and magnetic properties of the permanent-magnet rotor can be realized, thereby improving the structural strength and magnetic stability of the permanent-magnet rotor which has the target structure.

This invention discloses a method for improving the magnetic properties of ferrosilicon soft magnetic alloys. The method further includes forging heating of the alloy at a temperature of 850℃±10℃. The alloy is formed by batching and smelting multiple alloying elements in the following weight percentages: C 0.03%, Si 2.5%, Mn 0.05%, P 0.18%, S, Al, with the balance being Fe. The method also includes a heat treatment process: heat treatment at 950℃~980℃ for 4 hours, followed by cooling to 500℃ at a rate of 100℃ / h, and then cooling to below room temperature at a rate of 50℃ / h~150℃ / h before unloading. This invention enables the ferrosilicon alloy magnetic material to possess high saturation magnetic induction (Bs) characteristics while exhibiting low remanence (Br), thereby improving the magnetic stability and reliability of the ferrosilicon alloy magnetic material.

This utility model provides a machine tool waste trough with magnetic chip collection, relating to the field of machine tool auxiliary equipment technology. It includes a trough body with an inclined slot at the top. The front and rear sides of the inclined slot are sloped surfaces, and a magnetic plate is fixedly installed on the sloped surfaces. A scraping assembly is provided on the outer surface of the magnetic plate, and a distributing assembly is provided at the bottom of the trough body. This utility model, through the cooperation of a first motor, transmission screw, sliding scraper, and a second motor, transmission gear, transmission wheel, pulley, transmission belt, and pusher plate in the scraping assembly, not only achieves comprehensive scraping of chips from the magnetic plate through the sliding scraper, avoiding the tediousness and omissions of manual cleaning, but also pushes the chips scraped off from both sides of the sliding scraper downwards through the pusher plate, preventing chips from accumulating at the edge of the magnetic plate and ensuring that the chips fall smoothly into the bottom of the trough body. This effectively avoids the problem of decreased magnetic efficiency caused by chips obscuring the magnetism of the magnetic plate, improving chip cleaning efficiency and magnetic stability.