Ferromagnetic substances such as iron, cobalt, nickel or ferrite are different. The internal electron spins can be spontaneously arranged in a small range to form a spontaneous magnetization zone. This spontaneous magnetization zone is called a magnetic domain. After the ferromagnetic substance is magnetized, the internal magnetic domains are neatly arranged and aligned in the same direction to strengthen the magnetic force, and the magnet is formed. The magnet absorption process of the magnet is the magnetization process of the iron block. The magnetized iron block and the magnet are attracted to each other in different polarities, and the iron block is firmly adhered to the magnet.
The natural magnet is triiron tetroxide, and the artificial magnet is usually steel. After the magnet is magnetized, it will retain the magnetic properties. The natural permanent magnets are not only ferrite (ferric oxide), but also various permanent magnet materials such as iron-cobalt-nickel alloy and iron rare earth alloy, such as aluminum-nickel. Cobalt, samarium cobalt, neodymium iron boron, these are also very common, magnetic is very strong, these substances can be magnetized by the magnetic field constant magnetic field, and magnetized itself is magnetic and does not disappear. The composition of the artificial magnet is determined according to the magnetization properties of various metals. The magnet approaches (touches) the magnetic substance, which is induced to become a different name near one end and the same name at the other end.
Rare Earth Neodymium Magnet
Classification of magnet is shared by professional Neodymium Bar Magnets Factory:
A. Temporary (soft) magnet
a. Meaning: Magnetic is short, and the magnet disappears when the magnet is removed. b. Example: nails, wrought iron
B. Permanent (hard) magnet
a. Significance: After magnetization, it can retain magnetism for a long time. b. Example: steel nail
According to the above information, it is summarized as follows:
According to the principle of electromagnetic induction, a strong current can generate a strong magnetic field, and a ferromagnetic substance is magnetized by a strong magnetic field, and since the magnetization characteristics of different substances are different, some substances are easy to magnetize and are not easy to fall. Magnetic (loss of magnetism), it can retain magnetism for a long time. Magnetizing this material produces a magnet. Magnetize the hard magnet with a magnetizer.
According to the principle of electromagnetic induction, a current can generate a magnetic field, and a hard magnetic substance is magnetized by a strong magnetic field. Generally speaking, it is a magnetic material of a magnet. Actually, there are several different things: the most common magnet, such as a magnet for a general speaker, is iron. Helium oxygen magnet. They are iron scales (sheet-like iron oxides) which are detached from the surface of the slab rolling material during hot rolling in the steel mill. After removing impurities, pulverizing and adding a small amount of other substances, they are placed in a steel mold and pressure-molded. Then, it is sintered in a reducing electric furnace (through hydrogen), and a part of the oxide is reduced to ferrite, cooled, and then placed in an exciter to be magnetized.
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