C8 ceramic segment magnets from China manufacturer

Price:	10.0 USD
Payment Terms:	T/T,L/C,WU
Place of Origin:	Zhejiang, China (Mainland)


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Product Detail

Means of Transport: Air

Packing: As your request

Application: Industrial Magnet

Type: Permanent

Brand Name: Able Magnet

Certificate: SGS, RoHS

Production Capacity: 50000000 pcs/month

Delivery Date: 3-30 days

Shape: Others

Composite: Ferrite Magnet

Port of loading: Ningbo or Shanghai

Main Export Market: USA, Europe, etc

Ceramic (Ferrite) Magnets are produced by calcining a mixture of iron oxide and strontium carbonate to form a metallic oxide

product name: Soft Ferrite magnets

Ferrites are chemical compounds consisting of ceramic materials with iron(III) oxide (Fe₂O₃) as their principal component.^[1] Many of them are magnetic materials and they are used to make permanent magnets, ferrite cores for transformers, and in various other applications.

Many ferrites are spinels with the formula AB₂O₄, where A and B represent various metal cations, usually including iron. Spinel ferrites usually adopt a crystal motif consisting of cubic close-packed (fcc) oxides (O²⁻) with A cations occupying one eighth of the tetrahedral holes and B cations occupying half of the octahedral holes. If one eight of the tetrahedral holes are occupied by B cation, then one fourth of the octahedral sites are occupied by A cation and the other one fourth by B cation and it's called the inverse spinel structure. It's also possible to have mixed structure spinel ferrites with formula [M²⁺_1-δFe³⁺_δ][M²⁺_δFe³⁺_2-δ]O₄ where δ is the degree of inversion.

The magnetic material known as "ZnFe" has the formula ZnFe₂O₄, with Fe³⁺ occupying the octahedral sites and Zn²⁺ occupy the tetrahedral sites, it's an example of normal structure spinel ferrite. ^[2]

Some ferrites have hexagonal crystal structure, e.g. barium ferrite BaO:6Fe₂O₃ or BaFe₁₂O₁₉.

Ferrites that are used in transformer or electromagnetic cores contain nickel, zinc, and/or manganese compounds. They have a low coercivity and are called soft ferrites. The low coercivity means the material's magnetization can easily reverse direction without dissipating much energy (hysteresis losses), while the material's high resistivity prevents eddy currents in the core, another source of energy loss. Because of their comparatively low losses at high frequencies, they are extensively used in the cores of RF transformers and inductors in applications such as switched-mode power supplies.

The most common soft ferrites are:

Manganese-zinc ferrite (MnZn, with the formula Mn_aZn_(1-a)Fe₂O₄). MnZn have higher permeability and saturation induction than NiZn.
Nickel-zinc ferrite (NiZn, with the formula Ni_aZn_(1-a)Fe₂O₄). NiZn ferrites exhibit higher resistivity than MnZn, and are therefore more suitable for frequencies above 1 MHz.