What kinds of metal magnets can suck up?
We put the paramagnetic and diamagnetic substance called weak magnetic material, magnetic material is called strong magnetic material. The magnetic material generally refers to the strong magnetic material. Magnetic materials are magnetized to magnetic difficulty can be divided into soft magnetic materials and hard magnetic materials. The magnetization of the magnetic substance easy to remove a soft magnetic material, not easy to touch the material called hard magnetic materials. Generally speaking, soft magnetic material, remanence, hard magnetic material remanence is larger.
Ferromagnetic material:The experiment shows that any material can more or less be magnetized in a magnetic field, the magnetization is different. According to the characteristic of the material in the external magnetic field, the material can be roughly divided into three categories: paramagnetic material, anti magnetic material, magnetic material.According to molecular current hypothesis, the material should exhibit similar properties in the magnetic field, but the characteristics of our material tell in the external magnetic field varies greatly, which reflects the limitations of molecular current hypothesis. In fact, the microstructure of various substances are different, the difference of this kind of material is the material of magnetic structure the difference.
Magnetic materials according to the chemical composition, there are two common categories: metal magnetic material and ferrite. The ferrite is magnetic oxide to iron oxide as the main component of the remanence. Soft magnetic material is weak, and easy to apply to the magnet, the magnetization of the repeated occasions, can be used to manufacture semiconductor radio antenna bar, the tape recorder head, computer memory, and transformer, AC generator, and high frequency components of the electromagnet core. Metal soft magnetic materials are common soft iron, silicon steel, nickel alloy, soft magnetic ferrite has common MnZn ferrite, nickel zinc ferrite. The remanent magnetization of hard magnetic material the strong, and not easy for demagnetization, made of a permanent magnet, used in magnetoelectric meter, speaker, microphone, permanent magnet motor and other electric equipment. The common metal hard magnetic materials are carbon steel, tungsten steel, aluminum The common hard ferrite of nickel cobalt alloy is barium ferrite and saw ferrite
