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The difference between the sintered ndfeb and ordinary ferrite magnets

by:Newland     2020-05-05
Ferrite magnet is a ferromagnetic metal oxide. In terms of electrical characteristics, the resistivity of ferrite magnetic material is much bigger than metals and alloys, but also high dielectric properties. Ferrite magnetic can also performance in high frequency with high magnetic permeability. Therefore, ferrite has become a high-frequency weak current widely used in the field of magnetic material, not of metal. The nonmetal magnetic materials, ferric oxide and one or more other metal oxide compound oxide ( Or is ferrite) 。 Magnetic usually is 800 - 1000 gauss, often used in the speakers, speakers and other devices. The advantage of sintered ndfeb is cost-effective, good mechanical properties; Lack of Curie temperature in low point, temperature characteristic is poor, and is easy to be pulverization corrosion, must through the adjust its chemical composition and take surface treatment methods to improve, to reach the requirements of practical application. Sintered ndfeb belongs to the third generation of rare earth permanent magnet material, has the characteristics of small volume, light weight and strong magnetic, is currently the best price-performance magnets, the magnetic field is known as the king of magnetic. The advantages of high energy density of sintered ndfeb permanent magnet material in modern industry and obtained widespread application in electronic technology. Under the conditions of bare magnetic, magnetic force can reach about 3500 gauss.
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