Introduction to bonding neodymium iron boron

● Composition and Structure

Main components: Based on magnetic powder composed of neodymium (Nd), iron (Fe), and boron (B), rare earth elements such as dysprosium (Dy) and terbium (Tb) are added to
enhance magnetic properties; Thermoplastic resins (such as nylon and polyphenylene sulfide) or thermosetting resins (such as epoxy resin) are used as binders to bond magnetic
powders into shapes. Some products also add lubricants, coupling agents, and other additives to improve processing performance.

Material structure: Magnetic powder is uniformly dispersed in the binder matrix to form a composite material structure. Magnetic powder retains the tetragonal crystal structure,
while the binder wraps around the magnetic powder particles to provide fixation and protection, making the overall material both magnetic and mechanically flexible.

● Performance characteristics

Magnetic performance: The remanence is generally between 0.6-1.2T, the coercivity range is 800-1400kA/m, and the magnetic energy product is usually 10-30kJ/m ³. Compared
with sintered neodymium iron boron, the overall magnetic performance is lower, but it can meet some application scenarios with less extreme magnetic requirements.

Other features: Good dimensional accuracy, with tolerances controllable within ± 0.01mm; High degree of freedom in molding, capable of directly producing complex shapes such
as thin-walled, multipolar, and irregular structures; The density is about 5.8-6.2g/cm ³, which is lighter than sintered neodymium iron boron; It has a certain degree of corrosion
resistance, and the adhesive coating reduces the contact between the magnetic powder and the external environment, but surface treatment is still required in special environments;
Has good mechanical strength, can withstand a certain degree of impact and vibration, and can be integrated with other materials for molding.

● Application areas

Consumer electronics: widely used in mobile phone vibration motors, headphones, hard disk drives, CD/DVD drives, smart wearable devices, etc., utilizing its high dimensional
accuracy, ability to be made into complex shapes, low noise and other characteristics, it meets the needs of miniaturization and precision of electronic devices.

Automotive industry: used for automotive micro motors, such as oil pump motors, seat adjustment motors, wiper motors, window lift motors, etc; In new energy vehicles, it is
also applied to components such as electric power steering systems (EPS), air conditioning compressor motors, etc., to enhance the intelligence of the vehicle

Energy efficiency and energy-saving performance.  

Industrial automation: suitable for joint motors, servo motors, and stepper motors of industrial robots, meeting high-precision motion control requirements; It can also be used for
sensors, encoders, and other devices to achieve accurate position detection and signal transmission.

Medical devices: gradient magnetic field coils, small surgical instrument motors, medical robot drive components, etc. used in magnetic resonance imaging (MRI) equipment, require
magnets to have good biocompatibility and stability.

Other fields, such as toy motors, power tools, smart home devices, etc., provide power and magnetic functions for products.