The difference between magnetic pump magnetic material NdFeB and ferrite

Magnetic pump magnetic material NdFeB and ferrite difference The magnetic coupling in the fluoroplastic magnetic pump is its main component. Today we will come to know the magnet on the magnetic coupling.
The magnet is divided into a weak magnet and a strong magnet.
Fluoroplastic magnetic pumps are commonly used in two types. Weak magnets are also called ferrite magnets, and strong magnets are called neodymium iron boron magnets.
Ferrite magnets are common black magnets, which are commonly found in headphones, horns, permanent magnet motors, and of course, our fluoroplastic magnetic pumps. The surface magnetic energy product of the ferrite magnet (the value of the magnetic height) can generally reach 1,200-16,000 Gs after saturation magnetization. The theoretical temperature resistance is 250 ° C, the magnetic demagnetization curve at high temperature, and the magnetic properties can be completely restored when the temperature is lowered. The price is extremely advantageous over other magnetic materials, but it is not used in a wider range of industries due to the limited surface energy product. Therefore, the ferromagnetic magnetic pump made of ferrite magnet or the stainless steel "target=_blank> stainless steel magnetic pump has a great advantage in price compared to the strong magnetic stainless steel "target=_blank> stainless steel magnetic pump, but in the delivery High density media is not sufficient. Moreover, due to the demagnetization characteristic of the magnetic steel, the magnetic fading is more serious after exceeding 100 ° C, and the phenomenon of internal and external magnetic slipping is prone to occur. Therefore, the high temperature field is also limited.


The name of NdFeB magnet is “Magnetic King”. Why do you say this? Because it has a surface magnetic energy product of 35000-45000Gs after saturation magnetization, the magnetic energy product can be further improved by improving the formula of NdFeB magnet. . The neodymium iron boron magnetic steel introduced here is the grade 38SH, which is also the most used magnetic steel in the stainless steel "target=_blank> stainless steel magnetic pump. Its maximum operating temperature is 150 °C. With the improvement of the formula, the use temperature can be the highest. It reaches 200 ° C. When the temperature reaches the limit, the demagnetization curve of NdFeB appears collapsed and will instantly fade to 0 at a temperature point, which can be said to be very sensitive to temperature. The price of NdFeB is relative to ferrite The body will be much higher, but the magnetic properties it can provide are beyond the reach of ferrite, so the future NdFeB magnetic materials will have a wider application space and market.

It can be seen that selecting different fluoroplastic magnetic pumps according to different working conditions is a problem that you need to consider.

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