Anisotropic magnet-wet process

What is a ferrite magnet? How to make ferrite magnet?

Ferrite permanent magnets are more commonly referred to as ceramic magnet. They are obtained from iron oxides and from strontium or barium carbonate: these raw materials are generous on Earth, so availability of ferrite is rather high. 

First development of ferrite magnet started in the 40’s, but they have been offering in the market since the 50’s.

Ferrite magnets are obtained from iron oxides and from strontium or barium carbonate: these raw materials are generous on Earth, so availability of ferrite is rather high.

The raw materials are mixed together, granulated and thermally treated to get finally hexaferrite phase (SrFe12O19 or BaFe12O19). This granulate is then ground to a powder.Pressing can be performed under magnetic field (to maximize anisotropy of the magnet) or not (isotropic ferrite magnets) and can be wet or dry. 

Features & Benefits

Raw material is readily available and low in cost

Relatively brittle & hard

Easy to magnetize and good resistance to demagnetization

Excellent corrosion resistance

Good temperature stability

high coercive force and high electric resistance

Most widely used permanent magnets

Hard ferrite magnet has a wide variety of applications: Speaker Magnets, DC Motors, Sweepers, Magnetic Separators for ferrous materials, Automotive Sensors, Reed Switching, Hall Effect Devices, in Assemblies such as (separating, holding, lifting, retrieving, and latching), Fridge Magnets and Arts and Crafts as well as many other novelty applications.