Disc magnets ferrite
Block magnets ferrite
Ring magnets ferrite
Pot Magnets ferrite
Ferrite magnets
Ferrite magnets are easy to recognise due to their dark-grey colour.
Unlike neodymium magnets, they don't need any coating thanks to their non-corrosive material.
We carry ferrite magnets made of strontium ferrite (SrFe) in our assortment which are all axially magnetised.
Ferrite magnets are also known as raw magnets, hard ferrite magnets, ceramic magnets or ceramic permanent magnets.
The advantages of ferrite magnets at a glance:
- Temperature resistance from -40 °C to 250 °C for disc, block and ring magnets
- Perfect for outdoor use
- Inexpensive
Ferrite magnets: quintessential among magnets
Ferrite magnets are recognisable by their typical dark grey colour.
Many people are familiar with ferrite magnets from souvenir magnets or traditional board magnets
found in schools, offices and homes.
Magnets made of ferrite belong to the group of permanent magnets.
Ferrite magnets are the most widely produced type of magnet worldwide.
They consist mainly of ceramic materials, which is why ferrite magnets are also known as ceramic magnets.
supermagnete is your partner for high-quality ferrite magnets.
As a supermagnete customer, you benefit from
- premium ferrite magnets.
- various shapes: a selection of ferrite magnets in disc, block and ring form.
- large, available quantities: We have a total of over 42 million magnets in stock.
What are the distinguishing features of ferrite magnets? What is the difference between ferrite magnets and neodymium magnets? When are ferrite magnets used? Learn more about the properties of ferrite magnets:
Resistant to chemicals
The advantage of ferrite magnets is that they last a long time under extreme conditions and are not susceptible to chemicals, alkalis and salts. Magnets made of ferrite are therefore utilised in applications where durability is more important than a high magnetic force.
Temperature-resistant up to 250 °C
Ferrite magnets are temperature-resistant up to 250 °C, while neodymium magnets permanently lose their magnetisation at temperatures above 80 °C. Magnets made of ferrite are ideal for further processing. Because of these properties, raw ferrite magnets are particularly useful in industrial applications.Cost-effective manufacturing
As they are very inexpensive to manufacture, ceramic permanent magnets are used in products and applications that require a low-cost permanent magnet. These include loudspeakers, microphones, toys and certain motors, pumps and magnetic filters.
Ideal for outdoor use
Raw ferrite magnets are rust-resistant and therefore ideal for outdoor use. Ferrite pot magnets are also suitable for outdoor applications, but are larger and have a lower adhesive force than neodymium pot magnets.Magnet finder: Quickly discover the right ferrite magnets
If you are looking for ferrite magnets with very specific characteristics, you can quickly find the right magnets thanks to the magnet finder. All ferrite magnets are clearly listed on the magnet finder page. Various filter options are available so you can narrow down the large selection of magnets. Filter by desired adhesive force, size and shape. With just a few clicks, you will see all ferrite magnets with the characteristics you want.Interesting facts about ferrite magnets
What is the difference between magnetically soft ferrites and magnetically hard ferrites?
There are two types of ferrite, namely magnetically soft ferrites and magnetically hard ferrites. The difference lies in the level of coercive field strength. Magnetically soft ferrites have a coercive field strength that is as low as possible, whereas the coercive field strength of magnetically hard ferrites is as high as possible. Put simply, this figure indicates how well a magnet retains its magnetisation when exposed to an opposite magnetic field. The higher the number, the better. Magnetically soft ferrites are used in electrical engineering, whereas magnetically hard ferrites are used, for example, in loudspeakers or microphones.
Ferrite magnet shapes
At the supermagnete online shop, you will find the most common shapes of ferrite magnets:- Ferrite disc magnets
- Ferrite block magnets
- Ferrite ring magnets
How are ferrite magnets manufactured?
The manufacture of ferrite magnets is a complex process where the materials pass through many stages. In simple terms, the manufacturing process works like this:- The raw materials, among them iron-oxygen compounds such as iron(III) oxide or hematite, are milled into a very fine powder.
- This fine powder is heated to 1 000 °C in a step called calcining, then mixed with water and a binding agent before being dried, turning the mixture back into a powder.
- Once the powder is dry, it is pressed into the shape of the raw magnet. However, at this stage, they are not yet magnetic.
- The ferrite magnets then go through a sintering process. During sintering, the particles of the pressed powder are fused together or compacted by applying heat, which densifies the magnet.
- The next step is to grind and polish the magnets.
- Finally the ferrite magnets are magnetised. Picture it like this: Every fine grain of the powder is already magnetic in itself. However, since their magnetic fields act in random directions, the magnetic field of the magnet cannot be concentrated. The goal of the magnetisation process is therefore to have the magnetic forces ultimately act in the same direction. During magnetisation, the magnetic forces of the metallic materials are brought into the so-called preferred orientation for magnetisation with the help of an external magnet. You can find detailed information about this process in our Magnetism A-Z Glossary under Magnetisation. The ferrite magnets in our assortment are anisotropic. It means the magnets are magnetised in a predetermined direction. You can find more on this topic on our FAQ page Is this magnet isotropic or anisotropic?.
- The process is repeated so that the magnetisation does not dissipate.
- The ferrite magnets are now ready for further processing.
