A neodymium magnet (also known as NdFeB, Neodymium Iron Boron magnets Neo magnet), is a type of rare-earth permanent magnet. It is made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. This material is currently the strongest type of permanent magnet in the world.
This Sintered NdFeB magnet is coated with Titanium (Ti),
,the magnetized through the axial direction.
Nd-Fe-B permanent magnet is manufactured in a wide range of shapes, sizes and grades according customer's demand.
NdFeB has a very high energy product and coercivity, can pick up 660 times of own weight of heavy objects.
The advantage is high cost-effective, with good mechanical properties, easy cutting; according customer's demand to manufacture in a wide range of shapes, sizes and grades.
The shortcoming is easy to rust, oxidation, so the Sintered NdFeB's surface is usually required for plating such as zinc, nickel, silver, gold, etc., can also be done phosphorus treatment or spray epoxy resin to slow down the oxidation rate.
The magnetic field stability is important, the higher the coercivity of the permanent magnet alloy in other conditions as well as by the smaller the losses caused by external magnetic interference
The grade and its details properties, pls see follow table.
Sintered NdFeB magnetic energy parameters
Note: The above mentioned data of magnetic parameters and physical are given at 20℃±2℃
Grade | Residual Induction | Coercive Force | Intrinsic Coercive Force | Maximum Energy Product | Maximum Operating Temperature | ||||
Br | Hcb | Hcj | (BH)max | Tw | |||||
T | KGS | KA/m | KOe | KA/m | KOe | KJ/m3 | MGOe | ℃ | |
N35M | 1.17-1.21 | 11.7-12.1 | 892-915 | 11.2-11.5 | ≥1114 | ≥14 | 263-279 | 33-35 | ≤100 |
N38M | 1.22-1.26 | 12.2-12.6 | 907-931 | 11.4-11.7 | ≥1114 | ≥14 | 287-303 | 36-38 | ≤100 |
N40M | 1.26-1.29 | 12.6-12.9 | 907-947 | 11.4-11.9 | ≥1114 | ≥14 | 303-318 | 38-40 | ≤100 |
N42M | 1.30-1.33 | 13.0-13.3 | 907-947 | 11.4-11.9 | ≥1114 | ≥14 | 318-334 | 40-42 | ≤100 |
N45M | 1.33-1.37 | 13.3-13.7 | 907-955 | 11.4-12.0 | ≥1114 | ≥14 | 334-358 | 42-45 | ≤100 |
N48M | 1.36-1.42 | 13.6-14.2 | 907-955 | 11.4-12.0 | ≥1114 | ≥14 | 358-382 | 45-48 | ≤100 |
The main physical properties of sintered NdFeB
magnetic properties | Parameters |
Density /g.cm3 Vickers Hardness HV Resistivity /υΩ.cm Compressive strength/N.mm-2 Coefficient of Thermal Expansion (C⊥)/K-1 Coefficient of Thermal Expansion (C∥) /K-1 | 7.45 570 150 780 -4.8X10-6 -3.4X10-6 |
APPLICATION:
instrumentation,
electro-acoustic motor,
magnetic magnetization device
micro motors,
electronic industry,
automobile industry,
petrochemicals,
nuclear magnetic resonance device,
sound device magnetic suspension system,
magnetic transmission machine
magneto therapy equipment
high performance motors,
brushless DC motors,
generators,
magnetic separation,
magnetic resonance imaging,
sensors
loudspeakers
headphones,
hearing aids,
voice coil motors,
magnetic vibrators,
vibrating motors,
permanent magnet motors,
magnetic thrust axis,
magnetic machinery,
magnetic spring,
magnetic vibration device
magnetic connection,
magnetic drive,
Permanent magnet crane
electromagnetic pumps,
magnetic separators
MRI
magnetic machine
magnetic equipment
magnetic water
magnetic seal
oil magnetization of paraffin
