Soft Ferrite magnets
10.0 USD
| Min. Order: | 1 Piece/Pieces |
|---|---|
| Payment Terms: | L/C, T/T, WU |
| Supply Ability: | 50000000 pcs/month |
| Place of Origin: | Zhejiang |
Company Profile
| Location: | Ningbo, Zhejiang, China (Mainland) |
|---|---|
| Business Type: | Manufacturer, Trading Company |
Product Detail
| Means of Transport: | Air |
|---|---|
| Application: | Industrial Magnet |
| Shape: | Others |
| Type: | Permanent |
| Composite: | Ferrite Magnet |
| Brand Name: | Able Magnet |
| Port of loading: | Ningbo or Shanghai |
| Certificate: | SGS, RoHS |
| Main Export Market: | USA, Europe, etc |
| Production Capacity: | 50000000 pcs/month |
| Packing: | As your request |
| Delivery Date: | 3-30 days |
Product Description
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.
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 MnaZn(1-a)Fe2O4). MnZn have higher permeability and saturation induction than NiZn.
- Nickel-zinc ferrite (NiZn, with the formula NiaZn(1-a)Fe2O4). NiZn ferrites exhibit higher resistivity than MnZn, and are therefore more suitable for frequencies above 1 MHz.
