Ferrite

Name:
Ferrite
Detailed information:
(1) Iron in the body-centered cubic form; commonly occurs in steels, cast iron, and pig iron at approximately 910C. α and β iron are the common varieties of ferrite, and the name is also applied to Δ iron. (2) A compound, a multiple oxide, of ferric oxide with another oxide, as sodium ferrite, NaFeO₂, but more commonly a multiple oxide crystal. Ferrites are made by dissolving hydrated ferric oxide in concentrated alkali solution; by fusing ferric oxide with alkali metal chloride, carbonate, or hydroxide; or by simply heating metal oxides with ferric oxide. Ceramic ferrites are made by press-forming powdered ingredients (with a binder) into a sheet, then sintering or firing.

Use:

The oxide ferrites in rectifiers on memory and record tapes, for permanent magnets, semiconductors, insulating materials, dielectrics, high-frequency components, and various related uses in radio, television, radar, computers, and automatic control systems.