Alnico magnets ,one kind of metal alloys, composed of primarily aluminum, nickel, and cobalt with other
small amounts of other elements . One preferred materials for excellent temperature stability , good
resistance to demagnetization , high residual induction , and relatively high energies . However by strength , much weaker than NdFeB magnets , SmCo magnets and Ferrite magnet.
Divided into Sintered Alnico magnet and Cast Alnico magnet according to different production processes.
Cast Alnico magnets made by meted alnico into a mold . The solidified material is rough ground and
then heat treated and cooled . Anisotropic and Isotropic can be available . After treatment ,
the material is ground to specific tolerances, then magnetized .
Sintered Alnico magnets made from a powdered mixture of ingredients , then pressing , sintering .
Cast magnets may be manufactured in complex shapes, such as horseshoes, not possible for other
magnet materials. Sintered Alnico offers slightly lower magnetic properties but better mechanical
characteristics than cast Alnico.
Now Alnico magnets are widely used in Auto parts, instrumentation, electro-acoustic, electrical, teaching,Aerospace military ,instrumentation, communications, magnetic switches and a variety of sensors , etc.