Magnetic Powders

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  • Magnetism

Presentation on Theme: Magnetism

Presentation on Theme: Magnetism : 1 Magnetism 2 Activating Strategy With a partner, take the list of everyday objects provided by the teacher and identify those objects that have or use magnets. Instructional Approach(s): Think-pair-share. The teacher should use the slide to activate students prior knowledge. 3 Essential question: how do the properties of magnets [...]

  • Learning Resources Iron Filings

Learning Resources Iron Filings

Learning Resources Iron Filings Fine Iron Filings Magnetic Iron Powder for Magnet Education and School Projects - Discover The World of Magnetics & See Magnetic Lines of This Unseen Force & More Iron filings are conveniently and permanently encased in durable plastic Explore magnetism and magnetic fields without a mess Includes 5 durable clear plastic [...]

  • Magnet Materials

Magnet Materials

Permanent Magnet Materials Permanent magnet lodestones contain magnetite, a hard, crystalline iron ferrite mineral that derives its magnetism from the effect the earth's magnetic field has on it. Various steel alloys can also be magnetized. The first big step in developing more effective permanent magnet materials came in the 1930s with the development of Alnico [...]

  • How Neodymium Magnets are Made

How Neodymium Magnets are Made

How Neodymium Magnets are Made The method for manufacturing Neodymium Iron Boron magnets is as follows: MELTING OF THE ALLOY UNDER VACUUM The Neodymium metal element is initially separated from refined Rare Earth oxides in an electrolytic furnace. The Neodymium, Iron and Boron and the other chemical elements are weighted and put in a vacuum [...]

  • The Illegal Rare Earth Mining

The Illegal Rare Earth Mining in China

The illegal rare earth mining in China have resulted in skewed export numbers with further implications reaching to the loss of revenue, held down prices, and environmental concerns surrounding the small operations. In the face of this problem, the Chinese government has repeatedly vowed to shut down these illegal mining operations a task proving to [...]

By |July 19th, 2019|Magnet Market, Magnetic Industry, Magnetic Knowledge, Magnetic Materials, Magnetic Powders, Rare Earth Export, Rare Earth Magnets, Rare Earth News, Rare Earths|Comments Off on The Illegal Rare Earth Mining in China
  • The role of magnet powder in NdFeB

The role of magnet powder in NdFeB

The role of magnet powder in NdFeB Magnetic powder is an abbreviation for magnetic powder, and is an aggregate composed of a large amount of NdFeB basic material particles and interparticle voids. The powder body is a substance between a solid and a colloid. Solids below 0.1 μm are referred to as colloids, while solids [...]

  • Isotropic polymer bonded SmFeN magnets

Isotropic polymer bonded SmFeN magnets

Isotropic polymer bonded SmFeN magnets Sm-Fe-N magnet powders are produced in a similar way to Nd-Fe-B, except that nitrogen is introduced by heat treatment of rapidly quenched Sm-Fe flakes in a nitrogen atmosphere. These flakes are then mixed with a polymer binder and pressed or injected to make isotropic bonded magnets. Magnetic performance of (BH)max=112 [...]

By |June 17th, 2018|Bonded Magnets, Magnetic Knowledge, Magnetic Materials, Magnetic Powders, Magnetic Technology|Comments Off on Isotropic polymer bonded SmFeN magnets
  • Compression molded magnets

Compression molding magnets

Compression molding magnets Compression molded magnets are made by first mixing the magnetic powder with the polymer binder and then by compressing the mixture in a press mold. These magnets exhibit a higher level of performance than the injection molded couterparts due to higher density. Compression molded magnets   Features of compression molded [...]

By |June 13th, 2018|Bonded Magnets, Magnetic Knowledge, Magnetic Materials, Magnetic Powders, Magnetic Technology|Comments Off on Compression molding magnets
  • Isotropic polymer bonded NdFeB magnets

Isotropic polymer bonded NdFeB magnets

Isotropic polymer bonded NdFeB magnets - The raw material powder is manufactured by rapid quenching of prescribed alloys into nanocristalline flakes which are subsequently annealed for optimum magnetic properties. Shortly after the invention of rapidly quenched NdFeB magnet powders, MPCO had started to develop polymer bonded magnets from these powders. Isotropic polymer bonded NdFeB [...]

  • Magnetic sheet

Magnetic Sheet

Magnetic Sheet Material: Strontium ferrite in thermo-plastic binder. Max. operating temperature 356°F. Magnetic on 1 face. UV coating for cleaner handling. Flexible and impact resilient but can easily be cut using scissors. Regular shapes can be cut using inexpensive dies. Available with plain, white gloss or standard acrylic adhesive backing. Coloured and dry-wipe finishes available [...]

  • Typical Compression Bonded Magnetic Properties

Typical Compression Bonded Magnetic Properties

Typical Compression Bonded Magnetic Properties Many suppliers publish specifications for a nominal 10 MGOe magnets with a minimum limit of 9 MGOe. Similar for a nominal 11 MGOe magnet; minimum limit is 10 MGOe. Have to design to lower limit of BHmax Typical Compression Bonded Magnetic Properties BHmax Improvement in Compression Bonded Magnets The BHmax of a compression bonded isotropic NdFeB magnet is influenced by the following two factors: 1. Volume fraction of magnetic phase in the magnet – typically measured by the density of the magnet. • We are investigating increasing the pressing pressure which requires special press construction, lubricants and tooling materials – current production pressing pressures are 7tonnes/cm2 for 5.9 g/cm3 and 10MGOe; estimated that > 20 tonnes/cm2 required for 6.3 g/cm3 and > 11 MGOe. • Optimize the particle encapsulation chemistry and process. • Tailored multimodal PSD’s for maximum packing density. • Particle shape control. 2. Magnetic powder Br/BHmax • Increase isotropic Br of powders while maintaining sufficient Hci to have “linear” B‐H  demagnetization characteristic at the application temperature. Arc Permanent Magnet Neodymium Nickel N35UH   Neodymium Generator Arc Magnet Nickel N33H   Arc Neodymium Magnet Nickel N30H   Segment Neodymium Magnet Nickel N52

By |May 7th, 2018|Bonded Magnets, Bonded NdFeB, Compression Molded NdFeB, Magnet Properties, Magnetic Knowledge, Magnetic Powders, NdFeB|Comments Off on Typical Compression Bonded Magnetic Properties

What Are Bonded Magnets Anyway?

What Are Bonded Magnets Anyway? • Bonded magnets are composites of a permanent magnetic powder(s) embedded in a non‐magnetic matrix. • The matrix is typically a thermoplastic or elastomeric binder. • Common processing techniques are extrusion, injection molding, compression bonding, and calendering. • Exhibit excellent mechanical properties compared to fully dense rare earth and ferrite magnets. • End product has good finish and dimensional tolerances requiring no finishing operations. • Injection molded magnets can be formed into complex shapes and be insert or over molded directly onto other components to produce assemblies. • The non‐magnetic binder lowers the density of the magnet and dilutes the contribution of the magnetic powder. • They generate less magnetic output per unit volume than fully dense magnets. • The two most common magnetic powders are isotropic NdFeB and hard ferrite. Neodymium Bonded Radial Ring Magnet   Rare Earth Neodymium Isotropic Ring Bonded Magnet   Compression Bonded Ring Magnet   Bonded Ring NdFeB Magnet

By |May 3rd, 2018|Bonded Magnets, Bonded NdFeB, Compression Molded NdFeB, Injection Molding NdFeB, Magnetic Knowledge, Magnetic Powders, NdFeB, Permanent Magnet|Comments Off on What Are Bonded Magnets Anyway?