Alnico magnets are made from aluminum, nickel, cobalt, iron and a few other elements such as copper, titanium and sulfur etc. Because of their high magnetic flux density and superior temperature stability, Alnico magnets have been accepted in wider range of application. Alnico magnets are widely used in instruments, meters, speakers, electricity motor, sensor, microwave device, automatic control appliance, aviation, spaceflight and military technology, etc.