Properties of ferrite

Written by marjorie gilbert
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According to George G. Orenchak's work, "Measuring Soft Ferrite Core Properties," "Soft ferrites are ceramic electromagnetic (magnetically soft) material primarily used as cores for high frequency inductors and transformers." Using ferrite is not a new concept. Before Christ was born, ferrite gained attention because it attracted iron. Quantities of ferrite were first discovered in Asia, in the Magnesia region; ferrite's first name, magnetite, came from this region. Commercial use of ferrite did not begin until the 1940s, and it is still used today. Ferrite has distinct properties which make it valuable and useful.

Ferrite's Structure

Ferrite has a three-dimensional, crystalline structure. Its chemical formula is MO.Fe2O3, which means that it has two elements of iron and three elements of oxygen. The MO refers to other metal oxides which could be manganese, zinc or nickel oxide. By adding the other metal oxides, you are able to change the property of ferrite to make it suitable for various applications.


When shaping ferrite, you can splinter it, then sinter, or fire it, together into various dimensions. One thing to consider is this: ferrite shrinks when sintered by 10 to 17 per cent.


Ferrite is a material that can be magnetised easily and can hold this property indefinitely. If you need to, you can even magnetise ferrite so that it has multiple poles.


Ferrite is a material that is inherently brittle and will break easily if dropped from any height.

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