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How to demagnetize permanent magnet ferrite? What is the Curie temperature?

Release time:

2022-07-07 11:43

Source:

www.fgmagnet.com

To understand how permanent ferrite demagnetizes and what its Curie temperature is, then we must first understand what the Curie temperature is! In this article, the magnet manufacturer—Shenzhen Wanxuan Magnetic Industry Co., Ltd. will tell you the answer!
1. What is the Curie temperature?
Curie temperature, also known as Curie point/magnetic transition point, mainly refers to the temperature at which the spontaneous magnetization in magnetic materials drops to zero, and is the critical point at which ferromagnetic or ferrimagnetic substances transform into paramagnetic substances.
2. What is the Curie temperature of permanent ferrite ?
The Curie temperature of permanent ferrite is around 450°C, usually greater than or equal to 450°C, and the hardness is around 480-580. Among them, the Curie temperature of NdFeB magnets is basically between 350-370 degrees, but the use temperature of NdFeB magnets cannot reach the Curie temperature, and the magnetic properties have been attenuated a lot when the temperature exceeds 180-200 degrees. It is too big and has lost its use value.
3. How to demagnetize permanent ferrite?
It is more troublesome to demagnetize the permanent magnet ferrite, because the required temperature is very high. If it needs to be demagnetized, it needs to be heated to 900°C and fired back and forth to demagnetize. It is not clean just above the Curie point. It is said that magnet manufacturers will use permanent magnet ferrite demagnetizers for demagnetization.
The above is the magnet manufacturer answering the content about permanent magnet ferrite for you. The magnet manufacturer Wanxuan focuses on sharing various magnet knowledge. Welcome to pay attention and leave a message!

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