Neodymium magnet is the strongest type of permanent magnet. They are made of a mixture (alloy) of rare earth elements neodymium, iron, and boron (Nd2Fe14B). Neodymium magnet, also known as Neo, NdFeB magnet, neodymium iron boron, or sintered neodymium, is the strongest rare earth permanent magnet on the market. These magnets provide the highest energy products and can be manufactured in various shapes, sizes, and grades, including GBD. Magnets can be plated with different surface treatments to prevent corrosion. Neo magnets can be found in a variety of applications, including high-performance motors, brushless DC motors, magnetic separation, magnetic resonance imaging, sensors, and speakers.
Rare earth magnets developed in the 1970s and 1980s are the strongest type of permanent magnets manufactured and produce a magnetic field much stronger than other types such as ferrite or AlNiCo magnets. The magnetic field generated by rare earth magnets is usually much stronger than that of ferrite or ceramic magnets. There are two types: neodymium magnet and samarium cobalt magnet.
Rare earth magnets are very fragile and susceptible to corrosion, so they are usually plated or coated to prevent fracture and fragmentation. When they fall on a hard surface or break with another magnet or a piece of metal, they break or break. We need to remind you to handle it carefully and put these magnets next to computers, video tapes, credit cards, and children. They can jump together from a distance, holding their fingers or anything else.
Honsen Magnetics sells a range of rare earth magnets for industrial use and can assist in the design of special equipment using most types of special size permanent magnets.
We have various sizes of rare earth blocks, rare earth disks, rare earth rings, and other stocks. There are many sizes to choose from! Just call us to discuss your needs for rare earth magnets, and we will be happy to help you.
| Surface Treatment | ||||||
| Coating | Coating Thickness (μm) |
Color | Working Temperature (℃) |
PCT (h) | SST (h) | Features |
| Blue-White Zinc | 5-20 | Blue-White | ≤160 | - | ≥48 | Anodic coating |
| Color Zinc | 5-20 | Rainbow color | ≤160 | - | ≥72 | Anodic coating |
| Ni | 10-20 | Silver | ≤390 | ≥96 | ≥12 | High temperature resistance |
| Ni+Cu+Ni | 10-30 | Silver | ≤390 | ≥96 | ≥48 | High temperature resistance |
| Vacuum aluminizing |
5-25 | Silver | ≤390 | ≥96 | ≥96 | Good combination, high temperature resistance |
| Electrophoretic epoxy |
15-25 | Black | ≤200 | - | ≥360 | Insulation, good consistency of thickness |
| Ni+Cu+Epoxy | 20-40 | Black | ≤200 | ≥480 | ≥720 | Insulation, good consistency of thickness |
| Aluminium+Epoxy | 20-40 | Black | ≤200 | ≥480 | ≥504 | Insulation, strong resistance to salt spray |
| Epoxy spray | 10-30 | Black, Grey | ≤200 | ≥192 | ≥504 | Insulation, high temperature resistance |
| Phosphating | - | - | ≤250 | - | ≥0.5 | Low cost |
| Passivation | - | - | ≤250 | - | ≥0.5 | Low cost, invironment friendly |
| Contact our experts for other coatings! | ||||||
If the magnet is clamped between two mild steel (ferromagnetic) plates, the magnetic circuit is good (there are some leaks on both sides). But if you have two NdFeB Neodymium Magnets, which are arranged side by side in an N-S arrangement (they will be very strongly attracted in this way), you have a better magnetic circuit, with potentially higher magnetic pull, almost no air gap leakage, and the magnet will be close to its maximum possible performance (assuming that the steel will not be magnetically saturated). Further considering this idea, considering the checkerboard effect (-N-S-N-S -, etc.) between two low-carbon steel plates, we can get a maximum tension system, which is only limited by the ability of the steel to carry all the magnetic flux.
Neodymium block magnets are useful for multiple applications. From crafting & metal working applications to exhibition displays, audio equipment, sensors, motors, generators, medical instruments, magnetically coupled pumps, hard disk drives, OEM equipment and much more.
-Spindle and Stepper Motors
-Drive Motors in Hybrid and Electric Vehicles
-Electric Wind Turbine Generators
-Magnetic Resonance Imaging (MRI)
-Electronic Medical Devices
-Magnetic Bearings
