Strong magnets generally refer to neodymium iron boron magnets, which are widely used in the market by rare earth praseodymium neodymium and iron alloys.
Iron often encountered in the course of the use of magnetic decline or disappearance is often happening, we summarize the reasons for the demagnetization of the following
1: magnet injection after demagnetization or degaussing, ordinary magnet temperature is 80 ℃, injection is basically above 12 ℃.
2: magnet hot pressing after the magnet or degaussing, often using glass plate hot pressing, the temperature above 150 ℃.
3: After the oven baking the magnet demagnetization
4: magnet material contains too much impurities lead to weak magnetic,
5: Impact leads to magnet demagnetization, such as high frequency impact
6: material containing metal lint lead to magnet powder and so on
7: high magnetic field environment test magnet itself magnet force disappears or N / S pole change (magnetizer demagnetizer)
Summary of the above demagnetization (demagnetization) causes the basic 90% of this 4 points, high temperature demagnetization, the material itself problem demagnetization, high frequency impact demagnetization, high magnetic field demagnetization.