Nickel-zinc ferrite ( NiZn, with the formula Ni aZn (1−a)Fe 2O 4).MnZn have higher permeability and saturation levels than NiZn. Manganese-zinc ferrite ( MnZn, with the formula Mn aZn (1−a)Fe 2O 4).The low coercivity means the material's magnetization can easily reverse direction while dissipating very little energy ( hysteresis losses), at the same time the material's high resistivity prevents eddy currents in the core, another source of energy loss. They have a low coercivity and are called " soft ferrites" to distinguish them from " hard ferrites", which have a high coercivity and are used to make ferrite magnets. Ferrites that are used in transformer or electromagnetic cores contain iron oxides combined with nickel, zinc, and/or manganese compounds. 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, and ferrite loopstick antennas for AM radio receivers.įerrites are ceramic compounds of the transition metals with oxygen, which are ferrimagnetic but nonconductive. It is used for its properties of high magnetic permeability coupled with low electrical conductivity (which helps prevent eddy currents). In electronics, a ferrite core is a type of magnetic core made of ferrite on which the windings of electric transformers and other wound components such as inductors are formed.
0 kommentar(er)
