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Demagnetization method of powerful magnet

Author:admin   AddTime:2021-11-08

Powerful magnets (giant high magnets) refer to neodymium iron boron magnets. Compared with ferrite magnets, AlNiCo, and Samarium Cobalt, its magnetic properties are much better than other types of magnets. NdFeB magnets can absorb 640 times their own weight, so NdFeB magnets are often used by outsiders. It is called a powerful magnet.

Strong magnets can be magnetized and demagnetized, because the magnet itself is more or less magnetic, so we can develop a certain demagnetization method according to the purpose of the strong magnet.

1. High temperature demagnetization method:

The main operation of the high-temperature demagnetization method is to heat the magnet in a high-temperature furnace. After high temperature treatment, the magnetism of the strong magnet will be removed, but during the heating process, the high temperature will directly cause the structure of the internal objects of the magnet to change greatly, so this demagnetization method is generally used for scrapped and recycled magnets.



2. Vibration demagnetization method:
The operation of this method is very simple. It is a powerful magnet that vibrates strongly and strongly. After the vibration operation, the internal structure of the magnet has changed, thereby changing the physical properties of the magnet. Generally speaking, the effect of using this demagnetization method. Not big, only a small amount of demagnetization can be used temporarily.

3. Magnet AC demagnetization method:
This method of demagnetization is to place the magnet in a space that can generate an AC magnetic field. After the interference of the AC magnetic field, the internal structure of the magnet will be destroyed, so as to achieve the effect of demagnetization. This method is more common. Degaussing method.

The above three methods are effective for the demagnetization of powerful magnets, but we still have to choose the AC demagnetization method, which is better than the high temperature demagnetization and vibration demagnetization methods, and the demagnetization efficiency is high.

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