Neodymium magnet (NdFeB) - a true super magnet, what is a neodymium magnet?

Neodymium magnet, also known as NdFeB magnet, is a permanent magnet with a Nd2Fe14B tetragonal crystal structure composed of an alloy of neodymium, iron, and boron. Its main components are rare earth elements neodymium (Nd), iron (Fe), and boron (B). Neodymium is a part of this material, known as "rare earth". The name of rare earths is not due to their natural concentration, but to the difficulty of separating them from other materials connected by chemical bonds. Therefore, it can be said that neodymium magnets are not the cheapest, but their magnetic force is the strongest, and this larger power can exist in magnets several centimeters away.

With nickel, zinc, or copper coatings, neodymium magnets have excellent resistance to atmospheric media. Neodymium magnets are currently the strongest magnets on the market and are known as the king of magnets. They have high magnetism, with a maximum energy product (BH) max greater than 10 times that of ferrite magnets. Neodymium iron boron has excellent mechanical processing performance, with a working temperature of up to 200 ° C. Moreover, neodymium magnets have stable performance and good cost-effectiveness, making them widely used in various industries.

What are the applications of neodymium magnets

In modern products that require strong permanent magnets, neodymium magnets have replaced other types of magnets. The application scope of NdFeB magnets is as follows: 1. In the field of acoustics: speakers, receivers, microphones, alarms, stage audio, car audio, etc. 2. Electronic products: permanent magnet vacuum circuit breakers, magnetic holding relays, electricity meters, water meters, sound level meters, reed switches, sensors, etc. 3. Motor field: VCM, CDDVD-ROM, generators, motors, servo motors, micro motors, vibration motors, etc. 4. Mechanical equipment: magnetic separator, magnetic separator, magnetic hoist, magnetic machinery, etc. 5. Medical and health care: MRI machines, medical equipment, magnetic therapy health products, magnetized fuel saving devices, etc. 6. Other industries: anti magnetization wax, pipeline descaling agent, magnetic fixing device, automatic mahjong machine, magnetic lock, door and window magnet, stationery magnet, luggage magnet, leather magnet, toy magnet, tool magnet, craft gift packaging, etc.

The history of neodymium magnets

NdFeB magnets were discovered by Masato Sato of Sumitomo Special Metals in 1982. The magnetic energy product (BH) max of this magnet is greater than that of cobalt magnets, which were the materials with the largest BH in the world at that time. Later, Sumitomo Special Metals successfully developed powder metallurgy methods, and General Motors successfully developed melt spinning technology, which can prepare NdFeB magnets, which are currently the most powerful permanent magnets and commonly used rare earth magnets.

What makes neodymium magnets so unique?

Neodymium iron boron permanent magnets have the advantages of extremely high magnetic energy product and coercivity, as well as high energy density.

NdFeB magnets have strong magnetic force and are currently the strongest magnetic materials. They are widely used and cost-effective.

NdFeB magnets have excellent mechanical properties and can be easily processed into various shapes, including irregular magnets.

Neodymium iron boron magnets have high precision and tolerances can be controlled within ± 0.02mm.

prospect

The new technology has been planned to develop neodymium magnets and achieve higher maximum temperatures. Many scientists are researching solutions to improve the quality and strength of these magnets, and they will definitely find the answer in the near future. Laboratories involved in engine and energy technology cannot work without neodymium magnets. The use of small magnets with ultra-high power has increased the speed and power of hard disk drives or amplifiers.