What is the difference between NdFeB and ferrite?

- Jan 15, 2019 -

The advantages of NdFeB are high cost performance and good mechanical properties. The insufficient ferrite is located at a low Curie temperature point, has poor temperature characteristics, and is prone to chalking corrosion. It must be adjusted by chemical composition and surface treatment. It can be improved to meet the requirements of practical applications.

Ferrite is a metal oxide with ferromagnetism. In terms of electrical properties, ferrite has a much higher electrical resistivity than metal and alloy magnetic materials, and also has a higher dielectric property than NdFeB magnets. The magnetic properties of ferrite also show high magnetic permeability at high frequencies. Therefore, ferrite has become a non-metallic magnetic material with a wide range of applications in the field of high frequency and low voltage.

NdFeB is a third-generation rare earth permanent magnet material. It has the characteristics of small volume, light weight and strong magnetic properties. It is the best magnet before the magnetic material. It is known as the magnetic king in the magnetic field. The advantages of high energy density make NdFeB permanent magnet materials widely used in modern industrial and electronic technology. In the bare magnetic state, the magnetic force can reach about 3500 Gauss. Ferrite, also known as iron oxide or magnetic porcelain, is a non-metallic magnetic material and is a composite oxide (or orthoferrate) of magnetic ferric oxide and one or more other metal oxides. The magnetic force is usually 800-1000 Gauss, which is often used in speakers, speakers and other instruments.

The main differences between NdFeB magnets and ferrite magnets are as follows:

1. Ferrite magnets are not as good as NdFeB.

2. The price. Ferrite is much cheaper than NdFeB magnets.

3. NdFeB magnets are very resistant to temperature, while ordinary NdFeB is usually only 80 degrees. Exceeding this working temperature, demagnetization will occur.

4. Ferrite stability is very good, it is oxide itself, very stable, NdFeB is an alloy, and it is easy to oxidize, it must be coated.

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