Magnets are familiar to all of us. With the progress of science and technology and the development of the times, magnets have been widely used by people. Because there are so many kinds of magnets on the market, they have different shapes, so we need to know the use of magnets when we use them. Now most of the magnets we use are NdFeB magnets and ferrite magnets, so what is the difference between them?
NdFeB magnets have the advantages of high performance and good mechanical properties; the disadvantages are low Curie temperature point, poor temperature characteristics, and easy to pulverize and corrode. It is necessary to adjust their chemical composition and adopt surface treatment methods to improve them, so as to meet the requirements of practical application. Nd-Fe-B belongs to the third generation of rare earth permanent magnets. It has the characteristics of small size, light weight and strong magnetism. The advantages of high energy density make Nd-Fe-B permanent magnets widely used in modern industry and electronic technology.
Ferrite magnet is a metal oxide with ferromagnetism. As far as electrical properties are concerned, the resistivity of ferrite is much larger than that of metal and alloy magnetic materials, and it also has higher dielectric properties. The magnetic properties of ferrites also show high permeability at high frequencies. Therefore, ferrite has become a non-metallic magnetic material widely used in the field of high frequency weak current. It belongs to non-metallic magnetic material and is a composite oxide (or ferrite) of magnetic ferrous oxide with one or more other metal oxides.