báriumferrit

Báriumferrit, also known as barium ferrite or BaFe12O19, is a synthetic hexagonal ferrite compound with a strong magnetic property. It is a ceramic material belonging to the family of hard ferrites, meaning it possesses a high coercivity, making it difficult to demagnetize. The crystal structure of barium ferrite is based on the spinel structure, with barium ions occupying interstitial sites within the iron oxide lattice. This specific arrangement of ions results in its permanent magnetism.

Báriumferrit is produced through high-temperature solid-state reactions involving precursors such as barium carbonate and iron oxide. The precise stoichiometry and processing conditions are crucial for obtaining the desired magnetic properties. Its key characteristics include excellent resistance to demagnetization, high Curie temperature (around 450°C), and good corrosion resistance. These properties make it a cost-effective alternative to some other magnetic materials.

Due to its magnetic strength and affordability, báriumferrit finds widespread applications in various industries. It is commonly used in the production of permanent magnets for motors, loudspeakers, magnetic separators, and refrigerator magnets. It is also employed in magnetic recording media, although its use in this area has diminished with the advent of newer technologies. Furthermore, báriumferrit is utilized in microwave applications due to its magnetic properties at high frequencies.