6results about How to "Improve magnetism" patented technology

The application discloses a magnesium-based composite material and a preparation method and application thereof. The magnesium-based composite material comprises ferroferric oxide and a magnesium alloy. The magnesium alloy comprises the following components in percentage by weight: 3wt.%-6wt.% of Zn, 0.3wt.%-0.8wt.% of Ca, and the rest of Mg and inevitable impurities. The magnesium-based composite material can effectively solve the problem that micron-sized particles are easy to agglomerate in a metal liquid when the magnesium alloy is modified, and the plasticity of the alloy is reduced and the alloy is not easy to be formed.

This invention provides a rotor lamination, a rotor structure, and a permanent magnet motor. The rotor lamination has: multiple magnetic slots, which are sequentially spaced along the circumference of the rotor lamination; multiple recesses, all located on the edge of the rotor lamination and sequentially spaced along the circumference of the rotor lamination, wherein at least a portion of any recess is located between two adjacent magnetic slots along the circumference of the rotor lamination; and multiple grooves, each corresponding to one of the recesses, wherein any groove is located at the bottom of its corresponding recess and is recessed towards the interior of the rotor lamination. The rotor structure of this invention solves the technical problem of easy breakage of the magnetic isolation bridge between adjacent magnetic poles in related technologies.

The present application relates to sintered Nd-Fe-B magnet preparation technical field, more specifically, the present application relates to a kind of recycled sintered Nd-Fe-B magnet, it is characterized in that;The recycled sintered Nd-Fe-B magnet is prepared by composite magnetic powder by magnetic field forming, sintering and aging, the composite magnetic powder is obtained by mixing the recycled magnetic powder and conventional neodymium iron boron double alloy powder according to mass ratio 20%-40%:60%-80%;Wherein, the recycled magnetic powder is derived from waste sintered Nd-Fe-B magnetic block, is prepared by gas atomization powder processing process, particle size D50 is 3.0 μm-4.5 μm, oxygen content≤300ppm;The present application aims at realizing the resource recycling of waste magnetic block, while ensuring that magnet has low heavy rare earth dependence, high magnetic performance and high stability.The magnet is prepared by mixing the recycled magnetic powder and conventional neodymium iron boron double alloy powder according to specific proportion, recycled magnetic powder is obtained by waste magnetic block by gas atomization powder processing, and conventional neodymium iron boron double alloy powder is designed by multi-element component optimization.

This invention discloses a magnetic composite material, its preparation method, and magnetic devices prepared using the same, belonging to the technical field of bonded magnetic composite materials. The invention provides a magnetic powder comprising 0.5-4.5 wt.% lanthanum, 5.0-9.0 wt.% cerium, 2.5-4.0 wt.% praseodymium, 9.0-16.0 wt.% neodymium, 1.0-4.0 wt.% zirconium, 0.1-1.0 wt.% aluminum, 0.5-1.5 wt.% boron, with the remainder being iron (Fe). It also provides a magnetic composite material comprising 83-93 parts of the magnetic powder, 0.2-2 parts of a coupling agent, 7-17 parts of a resin polymer, 0.5-3 parts of a polymeric elastomer, and 0.1-0.5 parts of a lubricant. The magnetic composite material disclosed in this invention, when applied to magnetic devices, possesses characteristics such as low cost, low thermal demagnetization, high magnetic properties, and excellent mechanical and processability, meeting the requirements for magnetic devices in thermal management systems.

This invention discloses an adsorbent based on MOF materials and its processing technology, belonging to the field of adsorbent technology. The process includes the following steps: adding zirconium-based MOF-Fe3O4 to DMF, ultrasonically mixing, adding terephthalaldehyde, mixing, adding acetic acid, reacting at room temperature for 48-72 h, magnetically separating the precipitate, washing, and vacuum drying to obtain aldehyde-based zirconium-based MOF-Fe3O4; placing chromium nitrate nonahydrate and terephthalic acid in DMF, stirring and mixing, adding modified SBA-15, reacting at 180-220℃ for 12-24 h, cooling and filtering, washing and drying to obtain chromium-based MOF-SBA-15; adding aldehyde-based zirconium-based MOF-Fe3O4 and chromium-based MOF-SBA-15 to ethanol, adding acetic acid, reacting at room temperature, magnetically separating, washing and drying to obtain the MOF-based adsorbent. The MOF-based adsorbent prepared by this invention can be applied to the concentration and treatment of typical industrial VOCs waste gas.

This invention discloses a core-shell Sm-Fe-N alloy and its preparation method, wherein the core of the core-shell Sm-Fe-N alloy is Sm2Fe. 17 N b The outer shell is Sm 2( Fe a M 1‑a ) 17 N b M is selected from at least one of Mn, Co, Cr, or Ti, where 0.5 ≤ a ≤ 0.95 and 2.5 ≤ b ≤ 3.5. This invention first prepares Sm₂Fe using physical or chemical methods. 17 The alloy is a mixture of M-O or Sm2Fe with a surface coating of M-O. 17 The alloy is further reduced and diffused to form Sm2Fe 17 A thin Sm-Fe-M layer is formed on the alloy surface, followed by nitriding. This invention yields a high-heat-resistant and high-oxidation-resistant samarium-iron-nitrogen core-shell alloy through surface modification. By introducing metallic M into the outer shell layer, it overcomes the problem of reduced saturation magnetization caused by overall doping with metallic M, and also improves the Sm2Fe... 17 Magnetic properties of N3 at high temperatures.