Neodymium Magnet(NdFeB Magnet) is the third generation of permanent magnet developed in the 1980s.It is the magnet with strongest magnetic power today. And it has two kinds, Sintered Neodymium and Bonded Neodymium.
1.Alnico magnet was developed in the early 1930’s. Alnico magnet material is made by alloying aluminum, nickel and cobalt with iron. 2.With different process, they are totally with two kinds, Cast AlNiCo and Sintered AlNiCo. 3.A high working temperature limit (550 °C / 1020 °F) makes Alnico magnet especially well suited for sensitive automotive and aircraft sensor applications.
Ferrite Magnet is one kind of Permanent Magnet which made up by mixed Fe2O3 and SrO or BaO powder using ceramic technology.
SmCo permanent magnet is also named samarium cobalt permanent magnet, it’s normally sintered by amarium, cobalt and other metals. Working Temperature could reach 350℃