Ceramic magnetic materials provide a wide application area owing to their good price-quality mix. In addition to use in electric and electronic systems, these hard ferrite magnets are also used In less technical products such as memo magnets for planning systems, promotional gifts, magnetic door fastenings etc. The raw material used in ceramic magnets is composed of about 80% iron oxide and dependent on the properties required, strontium or barium carbonate and other materials are added.
There are two production methods: “dry press” and “wet press”. The dry process is used for isotropic and anisotropic materials. The wet press method applies only to the production of anisotropic material. From the automatic (wet) process of dosing, grinding and mixing raw materials, a pulpy, wet substance is obtained, which is pressed into the required form under the influence of a magnetic field. At the end of this production phase the product is demagnetized by inversion of the magnetic field. This is done in order to be able to release the pressed material from the form and to prevent fouling by loose magnetic particles.