Before the advent of Neodymium, ferrite magnets were the most widely used material in the industry. Despite the recent changes in available technologies, they remain the best choice in many fields due to their unique characteristics.
In addition to the matte appearance and dark gray color, the main features are definitely the value for money and resistance to corrosion from water and chemicals, thanks to the composition of iron and strontium oxide (or barium).
These magnets also have a high maximum operating temperature - up to 250 °C without loss of magnetization.
These are technical characteristics that go far beyond the limits imposed by standard neodymium magnets in terms of resistance to high temperatures and oxidation.
The rather modest magnetic strength of this material has led many companies to prefer neodymium, which allows for much easier miniaturization of components.
Nevertheless, ferrite remains the preferred material for many other industrial sectors, such as electrical generators, medical equipment, sensors and control devices, audio systems and amplifiers, souvenirs and advertising solutions, and so on.