What is a sintered neodymium magnet?

What is a neodymium magnet?

Neodymium magnet, also known as NdFeB magnet, is a tetragonal crystal formed by neodymium, iron and boron (Nd2Fe14B). In 1982, Sumitomo’s special metal Sasakawa discovered the neodymium magnet. The magnetic energy product (BHmax) of the magnet was larger than that of SM co magnet, and it was the largest magnetic energy product in the world at that time. Later, Sumitomo special metals successfully developed the powder metallurgy process, and General Motors successfully developed the melt spinning process to prepare NdFeB magnets. This kind of magnet is the permanent magnet which is second only to absolute zero degree holmium magnet, and is also the most commonly used rare earth magnet. NdFeB magnets are widely used in electronic products, such as hard disks, mobile phones, headphones and battery powered tools.

What is a sintered neodymium magnet?

Sintered Nd-Fe-B magnet is the world todayis one of the most powerful permanent magnetic materials in the world. Compared with traditional permanent magnet materials, sintered NdFeB has excellent permanent magnetic properties and high cost performance. Sintered NdFeB has greatly expanded the application potential of permanent magnet materials. It has been widely used in transportation, energy, communication, household appliances, machinery and medical treatment, and is playing an important role in green energy and artificial intelligence. It has become an indispensable functional material in production and life.

Sintered NdFeB magnets are mainly used in automobile (electric drive, electric power steering and sensor, etc.), wind power generation, information industry (hard disk drive, optical disk drive), consumer electronics (mobile phone, digital camera), household appliances (frequency conversion air conditioner, refrigerator and washing machine), elevator linear motor, nuclear magnetic resonance imaging instrument, etc The applications of manufacturing, intelligent driving and intelligent service are in the ascendant.

Production technology

MAGNETIC PROPERTIES

Magnetic properties of magnets (1) – N series

Magnetic properties of magnets (2) – G Series

Magnetic properties of magnets (3) – F series

DEMAGNETIZATION CURVES

OTHER PROPERTIES

Other physical properties of sintered NdFeB magnets (Reference)

Density(g/cm3)	Vickers Hardness(HV)	Curie Temperature(K)	Recoil Permeability
7.5	600	580-600	1.10

Magnetic property distribution of sintered NdFeB magnets

SURFACE TREATMENT

In order to improve the corrosion resistance of the magnet and meet the specific surface condition requirements, rizinia.com can carry out the following surface treatment for sanmag magnet according to the requirements of customers.

Note: according to different application environment of permanent magnet, rizinia.com can provide customized design of various composite coating to ensure the durability of magnet.