Permanent Magnets - Alnico, Ndfeb, Ferrite Grades | High Energy, Coercivity, Temperature Stability, Precision Tolerances

1) Alnico Grade Magnets:
Alnicos are precipitation-hardened alloys requiring special heat treatment techniques. The raw materials are cobalt, nickel, copper, aluminum and iron. Titanium, silicon, etc. are added in certain proportions. The raw materials in their purest form are melted in induction furnaces and castings are made using conventional shell moulds. The subsequent heat treatment process ensures precipitation of magnetic phases and thereby required magnetic properties like coercive force and the energy product. Finally, the castings are ground to obtain close dimensional tolerances and inspected for physical and magnetic accuracy.

2) NdFeB Grade Magnets:
These are made by powder compaction and sintering process.The NdFeB magnets have the highest energy and coercivity. Also they have better temperature stability than Samarium Cobalt magnets.

Applications
NdFeB magnets have the highest energy and coercivity. Also they have better temperature stability than Samarium Cobalt magnets.

3) Ferrite Grade Magnets:
Ferrites are a class of chemical compounds made by powder compaction and sintering process.