Neodymium-Iron-Boron Ring Speaker Magnet

Neodymium-Iron-Boron Ring Speaker Magnet, NdFeB Speaker Ring Magnet, N40 Speaker Neodymium Magnet, Chrome (Cr) Coting Neodymium Magnet, Neo Ring, Ring Rare Earth Magnet

Product Name: Neodymium-Iron-Boron Ring Speaker Magnet
Magnet ID:Ring-Ø40xØ36×6-N40-Cr
+ Highest Energy of All Permanent Magnets
+ Moderate Temperature Stability
+ High Coercive Strength
+ Moderate Mechanical Strength

Iron becomes magnetic when an external magnetic force is applied and one or two electrons in the iron atoms are reorientated. No other element has electrons that can be affected by an external magnetic force as easily as iron. But, even the few electrons in iron that exhibit this flexibility will not retain it for long. Heat or impact can cause the electrons to revert to their random orientation and magnetisation is lost. Because of this, manufacturers usually add another element that not only makes the magnet ‘permanent’ but also adds other special qualities, depending on the element added. Elements most commonly used are nickel, boron, cobalt, samarium, strontium and neodymium.
The most widely used permanent magnets are: Rare Earth, Ferrite and Alnico.

Rare Earth
Chemical composition: Nd2Fe14B.
Produced by powder metallurgical process.
Readily available in various forms and shapes, nickel-plated.
Very hard and brittle, cannot be drilled or machined.
Extremely stable and highly resistant to demagnetisation.
Precise calibration is achievable for critical applications.
Excellent strength/cost value.
Relatively low resistance to corrosion.
Not suitable for high temperatures application (80¼C plus).
Uses include:
Security systems
Magnetic separators
Magnetic resonance imaging
Health bandages and plasters
Specialty door catches
Filters & strainers
Sensors
High performance motors