Analysis of Physical Properties and Effects of Ferrite Magnets

Introduction to Ferrite Magnets

Ferrite magnets are metal oxides with ferromagnetic properties. In terms of electrical characteristics, ferrite magnets generally have a much higher electrical resistivity than magnetic metals and alloys, and also have high dielectric performance. Additionally, it also performs well in magnetic properties, with higher magnetic permeability at high frequencies. Therefore, ferrite has become a widely used non-metallic magnetic material in the field of high-frequency weak electricity. It is a composite oxide (or ferrite) of triiron tetroxide and one or more other metal oxides. The magnetic force is usually 800-1000 gauss, so it is commonly used in instruments such as speakers and amplifiers.

Physical Properties of Ferrite Magnets

Ferrite magnets are magnets made from raw materials such as SrO or BaO and Fe2O3. Compared to other magnets, it is tough but brittle, with a lower magnetic energy. Ferrite magnets are sintered permanent magnet materials composed of barium and strontium iron, in addition to having strong anti-demagnetization functionality, it is also relatively low in price. Due to the fact that ferrite magnets are hard and brittle, they require certain mechanical processing technologies. Its anisotropic magnet needs to be magnetized along the manufacturing goal orientation, while its isotropic magnet does not have a certain orientation and can be magnetized along any goal. The commonly used magnetic energy product is between 1.1MGOe and 4.0MGOe, and due to its low cost, ferrite magnets have a vast range of applications from motors, speakers to toys and crafts.

Analysis of the Role of Ferrite Magnets

Ferrite magnets are made using ceramic process technology, so they have a relatively hard structure. Ferrite is a metal oxide with ferromagnetism. In terms of electrical characteristics, it has a higher electrical resistivity compared to magnetic metals and alloy materials, and has good dielectric performance. At high frequencies, ferrite exhibits high magnetic permeability, making it a widely used magnetic material in the field of high-frequency weak electrical currents. Because ferrite has a low magnetic energy storage per unit volume and low saturation magnetization, its applications are limited in the low-frequency high-power and high-density magnetic energy fields. It is mainly used in automotive motors, magnetic bikes, and massage chairs.

Due to the advantages of good temperature resistance, low cost, and moderate performance, ferrite magnets are widely used permanent magnets. So, what are the roles of ferrite magnets? Ferrite magnets have a magnetic shielding effect; ferrite magnets have good temperature resistance and stability; ferrite magnets have adsorption effects, can conduct electricity and are suitable for use in many motor applications.