The advantages of NdFeB are high cost performance and good mechanical properties; The disadvantage is that the Curie temperature is low, the temperature characteristic is poor, and it is easy to be powdered and corroded. It must be improved by adjusting its chemical composition and adopting surface treatment methods to meet the requirements of practical application.
Ferrite is a kind of metal oxide with ferromagnetism. In terms of electrical properties, the resistivity of ferrite is much higher than that of metal and alloy magnetic materials, and it also has higher dielectric properties. The magnetic properties of ferrite also show high permeability at high frequency. Therefore, ferrite has become a widely used non-metallic magnetic material in the field of high frequency and weak current.
NdFeB is the third generation of rare earth permanent magnet material, which has the characteristics of small volume, light weight and strong magnetism. It is the current performance price ratio magnet and is known as magneto king in the field of magnetism. The advantages of high energy density make NdFeB permanent magnet materials widely used in modern industry and electronic technology. In the state of bare magnetic, the magnetic force can reach about 3500 Gauss. Ferrite, also known as ferrite or magnetic porcelain, belongs to non-metallic magnetic materials. It is a composite oxide (or ferrite) of magnetic iron 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 devices. The main differences between NdFeB magnets and ferrite magnets are as follows: 1. The performance of ferrite magnets is not as good as NdFeB magnets. 2. In terms of price, ferrite is much cheaper than NdFeB magnet. 3. Ferrite magnets have good temperature resistance, while ordinary NdFeB magnets usually only have 80 degrees. Demagnetization will occur when the temperature exceeds this working temperature. 4. The stability of ferrite is very good. It is oxide and very stable. NdFeB is an alloy, which is easy to be oxidized and must be protected by coating.