When it comes to the relationship between temperature and magnetism, we must first understand a concept-"Curie temperature".More than 200 years ago, a famous physicist Pierre Curie，discovered a physical characteristic of a magnet in his laboratory, that is, when a magnet is heated to a certain temperature, its original magnetism will disappear. Later, people called this temperat...

People familiar with magnet materials must have heard of Al-Ni-Co magnets. Alnico permanent magnet material is an alloy composed of metal aluminum, nickel, cobalt, iron and other trace metal elements. Al-Ni-Copermanent magnet material is the earliest widely used permanent magnet material, and its preparation process and technology are quite mature. Before the discovery of rare earth perm...