Sintered Neodymium Iron Boron Magnets

Sintered Neodymium Iron Boron Magnets

The sintered Neodymium Iron Boron magnet is produced by the OPS (orient-press-sinter) method.  A crystalline alloy of Neodymium, Iron, and Boron is ground to a sub-micron powder using a ball mill, then aligned in a strong magnetic field, and pressed into a basic shape.  The resultant "block" is then sintered, thereby fusing the material into a solid metal.

Neodymium Iron Boron magnets have some advantages over Samarium Cobalt magnets.  Neodymium Iron Boron magnets are less expensive,  since the  main elements Nd and Fe are abundant, and are mechanically stronger.  High energy products can be achieved.  Small production runs have successfully yielded 58 MGOe nominal energy products.

A word of caution: 

Do NOT use Neodymium Iron Boron magnets under the following conditions: 

In an acidic, alkaline, or organic solvent (unless you are going to hermetically seal the magnet inside a can) 

In water or oil (unless hermetically sealed, or you are prepared to accept a limited life) 

In an electrically conductive liquid, such as electrolyte containing water 

In a hydrogen-containing atmosphere, especially at elevated temperatures.  Hydrogenation, a process where the Hydrogen molecule will react with the NdFeB, will occur, causing the magnet to rapidly deteriorate 

Environments containing corrosive gasses, such as Cl, NH3, Nox, etc. 

In the path of radioactive rays

Sintered Neodymium Iron Boron Magnets is an intricate and interesting one. If you have more questions about magnet-making or products, Welcome contact Jugo Magnet freely!

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