Magnets are one of the most fascinating creations which manage to captivate one and all. What is more fascinating a fact, is that there are multiple types of magnets.
Most of us are familiar with the rare-earth magnets while the other popular category is that of ceramic magnets. But there are other types of magnets like injection molded, flexible, iron boron, cobalt-based, etc. But rare-earth and ceramic ones are the most popular segments within the permanent magnet sector.
Both these types of magnets differ in built-up ingredients (alloys and materials which these are made up of), hence the difference in properties these types portray. The ceramic type has many advantages over its rare-earth (lanthanide series is dubbed as rare earth, hence the name) cousins.
Ceramic magnets are made up of a combination of either barium or strontium carbonate and iron oxide. Here, an iron oxide that is used is in the powdered form. The most important advantage is that all its components are easily available, at a very low cost.
Manufactured via the processes of sintering and pressing, these are available in different grades. The grades start from grade C1 and extend to grade C8.
The cohesive force in these magnets is also quite high while this segment provides excellent resistance to corrosion, a major damage-creator.
On the flip side, ceramic magnets are quite brittle ( low mechanical strength) but the advantage trio of low cost, high cohesive force and high resistance to corrosion make this segment one of the most commercialized ones.