Ferrite magnets, also known as ceramic magnets, are made from a mixture of iron oxide and other materials such as strontium or barium. They are known for their low cost, high magnetic resistance, and good temperature stability.
The C8 grade indicates the magnetic strength of the magnet. A C8 ferrite magnet has a maximum energy product of around 3.8 Mega Gauss-Oersteds (MGOe). This is a medium-range strength for ferrite magnets, with higher grades such as C10 or C11 having stronger magnetic properties.
