10 results about "Iron nitride" patented technology

The application discloses a composite heat insulation material with wave absorption performance, a multilayer phase interface structure containing the composite heat insulation material and a preparation method of the multilayer phase interface structure; the composite heat insulation material comprises: a heat insulation material and a wave absorber, wherein the heat insulation material is yttrium zirconium oxide YSZ powder; the wave absorber is samarium iron nitride SmFeN powder; the mass ratio of the heat insulation material to the wave absorber is 1:1; the multilayer phase interface structure containing the composite heat insulation material comprises: a YSZ / SmFeN uniform mixing structure, an interface structure parallel to incident electromagnetic waves, an interface structure vertical to the incident electromagnetic waves and a periodic arrangement interface structure containing both the interface vertical to the incident electromagnetic waves and the interface parallel to the incident electromagnetic waves.

This invention belongs to the field of bonded permanent magnet materials technology, and discloses a high-density molded bonded samarium iron nitride (SMR) magnet and its preparation method. Addressing the shortcomings of existing molded magnets, such as low density, poor magnetic properties, and rapid mold wear, the magnet is made of 80%-95% SMR magnetic powder, binder, and other raw materials, achieving a density ≥7.3 g / cm³ and a maximum magnetic energy product ≥10.5 MGOe. A high-performance, detachable composite mold core, layered venting grooves, and a pressure mold with built-in magnetic field coils are employed. Combined with a preparation process of layered feeding, three-stage directional pressurization, and constant temperature pressure holding, the magnetic powder orientation and air expulsion are synchronized, improving magnet performance and mold life. This method is suitable for industrial mass production and can be applied in fields such as automotive motors and precision instruments.

This invention belongs to the field of functional materials technology and relates to a samarium iron nitride (SFIN)-based anisotropic bonded magnet and its manufacturing method. The manufacturing method includes the following steps: loading magnetic particles into a mold, pre-magnetizing them with a rapidly changing magnetic field, then further magnetizing them with a rapidly changing magnetic field, and applying pressure under the rapidly changing magnetic field to densify the magnetic powder; after demolding, a molded blank is obtained; the molded blank is heated to cross-link and solidify the binder, thus obtaining the target magnet. The manufacturing method provided by this invention not only improves the magnet orientation ability and magnet density under high-temperature pressing (HTPP) technology, obtaining high-performance, high-density SFIN-based bonded magnets with higher magnetism and density than existing technologies, but also significantly improves the orientation ability and magnet density of SFIN-based bonded magnets under low-temperature pressing (HTPP) and room-temperature pressing (room-temperature pressing) technologies, achieving low-temperature, room-temperature, and high-efficiency manufacturing processes for high-performance bonded magnets.

A secondary battery (5) and its preparation method and power supply device are disclosed. The secondary battery (5) includes a positive electrode, a negative electrode, and a separator (10). The separator (10) is located between the positive electrode and the negative electrode. The separator (10) includes a first polymer layer (101) and a material layer (102) disposed on the first polymer layer (101). The material layer (102) includes inorganic materials, including one or more of lithium aluminum titanium phosphate, lithium aluminum germanium phosphate, lithium aluminum titanium germanium phosphate, lithium aluminum titanium phosphate, lithium aluminum tantalum titanium phosphate, lithium tetrathiophosphate, lithium germanium phosphorus sulfide, lithium phosphorus sulfide, iron oxide, copper oxide, titanium dioxide, tin dioxide, manganese dioxide, zinc oxide, zirconium dioxide, chromium nitride, vanadium nitride, nickel nitride, iron nitride, graphene oxide, graphene oxide, fluorinated graphite, fluorinated graphene, fluorinated carbon nanotubes, and fluorinated carbon fibers. The secondary battery (5) has excellent high-rate cycle performance and a long service life.

The application relates to the technical field of magnetic materials, and discloses a praseodymium-coated samarium iron nitride powder and a preparation method thereof. The praseodymium-coated samarium iron nitride powder comprises a samarium iron nitride powder and a coating layer coated on the outer surface of the samarium iron nitride powder; and the material of the coating layer is pure metal. The praseodymium-coated samarium iron nitride powder material is obtained through process steps of pretreatment, target material feeding, target surface pretreatment, coating and post-treatment. The praseodymium-coated samarium iron nitride powder is prepared by a magnetron sputtering device under airtight and oxygen-free conditions, the oxidation degree of the powder is reduced from the source, the oxygen content of the obtained product is significantly lower than that of a product prepared by a traditional process, the dense praseodymium coating layer prevents oxygen and water from invading and avoids process pollution and powder agglomeration, and the praseodymium and the samarium iron nitride produce a magnetic performance synergistic effect, so that the comprehensive magnetic performance of the powder, such as residual magnetism, intrinsic coercive force and magnetic energy product, is effectively improved.

The application discloses a nitrogen vacancy-rich ferrocyanide coupled cobalt catalytic electrode and a preparation method thereof, which comprises a base electrode, a carrier layer and an active layer which are sequentially coated on the base electrode; the carrier layer is an Fe2N layer, and the active layer is a cobalt elementary sub-nanometer cluster layer; the loading capacity of the cobalt elementary sub-nanometer cluster layer is 50-600 μg / cm 2 The ferrocyanide coupled cobalt catalytic electrode has high activity and high stability, can construct a bifunctional synergistic catalytic system of "nitrogen vacancy stable active hydrogen + cobalt cluster activated C-Cl bond", and improves the electrochemical reduction dehalogenation efficiency on halogen-containing organic pollutants.

The application relates to the technical field of steel materials, in particular to a high-wear-resistance steel material for a pipe mold and a preparation process thereof, which comprises the following preparation steps: step S1: smelting, step S2: casting and heat treatment, and step S3: preparation of the high-wear-resistance steel material for the pipe mold. In the smelting process, an inoculation modifier composed of an Al-Ti-Nb intermediate alloy and a vanadium iron nitride alloy is used, the Al-Ti-Nb intermediate alloy and the vanadium iron nitride alloy can play a mutual synergistic effect, and the strength and toughness of the steel material body can be improved; through high-temperature solid solution treatment at 1030-1040 DEG C and twice tempering treatment at 540-560 DEG C, the toughness of the steel material body is optimized on the basis of maintaining high hardness, the balance between hardness and toughness is realized; in the preparation process of the high-wear-resistance steel material for the pipe mold, laser cladding material mixed by AlCoCrNiTiB alloy powder and nano ytterbium oxide powder is used to perform surface modification on the steel material body, so that the high-wear-resistance steel material for the pipe mold simultaneously has the characteristics of low friction and wear resistance.

This invention relates to the field of samarium iron nitride (SFeNi) permanent magnet material manufacturing technology, and discloses a method and system for optimizing SFeNi injection molding process parameters using digital twins. This method achieves dynamic optimization by integrating a digital twin with the physical production line. Real-time sensor data from the production line is collected and preprocessed. Based on this, a digital twin containing a particle layer, a melt layer, and a magnetic pole layer is constructed and updated. Using this twin, the agglomeration and orientation of SFeNi particles are predicted in the particle layer, temperature, shear, and magnetic flux distribution are simulated in the melt layer, and magnetic performance indicators are evaluated in the magnetic pole layer. Based on these predictions and evaluations, the material temperature, injection speed, pulsating magnetic field waveform, and holding pressure curve are optimized using an artificial intelligence proxy model. Finally, the optimized parameters are sent to the production line for execution via a programmable logic controller (PLC). This method achieves online adaptive adjustment of process parameters, improving the quality and efficiency of magnet molding.

This invention discloses an iron-nitride-based amorphous and nanocrystalline electromagnetic wave absorbing material, its preparation method, and its applications. The material comprises an in-situ generated Fe4N phase, which forms a composite structure with an iron-based amorphous and / or nanocrystalline matrix. The material possesses a composite phase structure of the amorphous phase and Fe4N phase, or an amorphous phase, α-Fe(Si) phase, and Fe4N phase. The preparation method involves a three-step nitriding treatment of iron-based amorphous and / or nanocrystalline powder: first, stress-relief heat treatment in a nitrogen atmosphere; second, reduction heat treatment in a mixed atmosphere of nitrogen and hydrogen; and third, nitriding heat treatment in a mixed atmosphere of hydrogen and ammonia, resulting in the in-situ generation of the Fe4N phase. This invention can improve the dielectric loss of the material, optimize impedance matching, and enhance electromagnetic wave absorption performance. This material has a minimum reflection loss of -73.28dB in the 1-18GHz frequency band, a -10dB bandwidth of up to 1.99GHz, and a matching thickness as low as 3.85mm. It can be applied to electromagnetic wave absorbing devices in fields such as high-frequency communication, radar detection, and remote sensing navigation.