Ferrite magnets: Inexpensive and very robust
Ferrite magnets are the cheapest magnets for simple applications. Compared to neodymium magnets, however, they are also significantly weaker. They withstand temperatures of up to 250 °C, are rust-resistant and therefore suitable for outdoor use.
In our range you will find a variety of different sizes, divided into ferrite ringmagnets and ferrite discmagnets as well as ferrite blockmagnets. Our hard ferrite magnets are ceramic materials and are very hard and brittle.
The areas of application cover a wide range of possibilities. Ferrite magnets are used, for example, in the construction of inexpensive fridge magnets, but also as school magnets or craft magnets and even in loudspeaker construction. When you buy a ferrite magnet, you get a real all-round helper.
What exactly are ferrite magnets?
Ferrite magnets are permanent magnets made of the magnetizable material ferrite. They are the most produced type of magnet in the world and are used in many different areas. A general distinction is made between:
Soft ferrite magnets have a comparatively low coercivity. This is the field strength required to demagnetize ferromagnetic substances.
Hard ferrite magnets have a high field strength. Accordingly, they can hold their magnetization longer when they encounter an opposing magnetic field.
Furthermore, ferrite magnets can consist of barium ferrite (BaFe) or strontium ferrite (SrFe) mixtures. Barium ferrite is generally cheaper, but the magnets are less powerful than those made of strontium ferrite. The latter are also suitable for use in connection with drinking water. Strontium ferrite is therefore used in the sanitary sector, among other things.
Is ferrite used in the electronics sector?
Ferrites are among the poorly or non-electrically conductive materials made of iron oxide - which is why they are rarely used in the electronics sector. But they are used, for example, in loudspeaker construction.
How are ferrite magnets manufactured?
The manufacturing process of ferrite magnets involves several steps. It starts with the raw material products – such as iron-oxygen compounds – being ground into a fine powder.
The powder is then heated to 1,000 °C, mixed and dried and then pressed into the shape of a raw magnet. However, the ferrite blank only becomes magnetic after it has gone through the so-called sintering process. The substances in the powder are heated and fused together in this way. Then the blanks are ground, polished and then magnetized. An external magnet brings the magnetic force of the metallic materials in the blank into the so-called preferred orientation.
After this process has been repeated, the ferrite magnets are finally ready for further processing.
Ferrite magnets vs neodymium - which is better?
Both ferrite and neodymium magnets offer certain advantages and disadvantages. In terms of holding power or adhesion, ferrite models cannot compete with our neodymium super magnets. On the other hand, neodymium is susceptible to corrosion, while ferrite is extremely moisture resistant.
The two types of magnets are therefore suitable for very different areas of application.
Are ferrite magnets suitable for outdoors?
Ferrite magnets are heat and moisture resistant and won't rust, so you can use them outdoors with ease. If you buy ferrite magnets, you can use them ideally as holding magnets for garden gates, for example.
Are ferrite magnets permanent magnets?
Permanent magnets are substances that always emit a magnetic force. The three known types of magnets are:
- Ferrite magnets
- Neodymium magnets
- AlNiCo magnets
Ferrite is the weakest magnetic material, but it is very robust. Neodymium magnets, on the other hand, have the greatest magnetic force or adhesive force, but are extremely susceptible to corrosion. AlNiCo magnets are those made from various alloys of aluminum, nickel, and cobalt. They are extremely heat and corrosion resistant, but only have a low coercivity, so they can be demagnetized quickly.