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What is the Curie temperature of a permanent ferrite magnet? What is the demagnetization temperature? Before answering this question, let's take a look at an introduction to the Curie temperature.
What is the Curie temperature?
Curie temperature refers to the temperature at which a material can change between a ferromagnet and a paramagnet. Below the Curie temperature, the substance becomes a ferromagnet, and the magnetic field associated with the material is difficult to change. When the temperature is higher than the Curie temperature, The substance becomes a paramagnet, and the magnetic field of the magnet is easily changed with the change of the surrounding magnetic field.
The picture is a multi-pole magnetized ring ferrite
What is the Curie temperature of a permanent magnet ferrite?
It is reported that the Curie temperature of ferrite is around 450°C, usually greater than or equal to 450°C, and the hardness is around 480-580.
How to demagnetize ferrite magnet?
If the ferrite is demagnetized, it is more troublesome, because the required temperature is very high, and if it needs to be demagnetized, it needs to be heated to 900 ℃ and reheated. Just above the Curie point is not clean. If you want to retreat, you can use the method of AC attenuation to demagnetize.
Curie temperature introduction of other magnets;
Maximum working temperature and Curie temperature of neodymium magnet
You are now seeing the specifications of this magnet ring OD 13mm, bore diameter 8mm, thickness of 3.5mm, the surface of the black epoxy, due to the reason of the photo may look like a ferrite, the actual bonded ring magnets, suitable for a variety of types of motor, sensor, and electric appliances....
Neodymium iron boron is divided into sintering, bonding and injection molding according to the different production processes. The general neodymium arc magnet is sintered, also called sintered arc neodymium magnet. Today this product is a bonded arc magnet that is not much used. The difference between sintered arc magnets is that bonded NdFeB magnet tiles require molds to produce....
Courage magnet manufacturers in China specialize in the production of various specifications of NdFeB strong magnetic tiles, large-radian strong magnetic tiles, large-sized arc magnetic tiles, arc-shaped sector magnets, and you are welcome to consult the arc-shaped magnets for quotation and proofing....
You are now browsing this ring for bonded neodymium magnets, gray epoxy on the surface, outer diameter 8mm, diameter of the hole is 4.5mm, height 6mm, it's mainly used in the field of electric motors, if you need other specifications, please consult us....
The sample shows a chemical nickel coated NdFeB small cylindrical magnet with N42 grade of magnetic properties, requires magnet N pole scribe marking, 2mm diameter, 2mm thickness, axial magnetization, the difference with conventional nickel is not obvious from the appearance but it is more suitable for use in wet, acidic or alkaline environments....
This is a small and thin (flat) round countersunk magnet, diameter 8mm, thickness is only 2mm, you see the countersunk hole neodymium magnets are generally about 3mm thick, so it belongs to the thinner countersunk hole magnets, if you want to be thinner it is difficult to process, for the customization of this type of magnets we are very good at,...
N42SH grade radial hollow cylindrical magnet 6.3x3x11mm for high speed motors...
This product is a T-shaped strong magnet, the material is rare earth NdFeB, it is a custom-shaped irregular Nd magnet, the sample is N52 grade, the surface is nickel coated, mainly used for connectors, electronic products, medical equipment, the maximum working temperature It is 80 degrees Celsius. If you need to use it in a high temperature environment, you need to replace the temperature resistant material....