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How to distinguish NdFeB and ferrite

Author:admin   AddTime:2021-06-19

NdFeB is simply a kind of magnet. The difference from the magnets we see everyday is that it is called "magnet king" because of its excellent magnetic function. NdFeB contains a large amount of rare earth element neodymium, iron and boron, and its characteristics are hard and brittle. Since the surface is easily oxidized and corroded, the neodymium iron boron must be surface coated. Surface chemical passivation is one of the good treatment methods. As a kind of rare earth permanent magnet raw material, NdFeB has extremely high magnetic energy product and coercivity. At the same time, the advantages of high energy density make NdFeB permanent magnet raw materials have ordinary use in modern industry and electronic technology, thus making the instrument The miniaturization, weight reduction and thinning of instruments, electro-acoustic motors, and magnetic separation and magnetization are possible. The advantage of neodymium iron boron is that it is cost-effective and has excellent mechanical properties; the disadvantage is that the working temperature is low, the temperature characteristic is poor, and it is easy to pulverize and corrode. It must be improved by adjusting its chemical composition and using surface treatment. Reach the requirements of essential use. Neodymium iron boron magnetic material, as a new consequence of the development of rare earth permanent magnet material, is called "magnet king" due to its excellent magnetic function. NdFeB magnetic materials are praseodymium neodymium metal, boron iron and other alloys. Also known as magnet.



Ferrite is a metal oxide possessing ferromagnetism. In terms of electrical properties, the resistivity of ferrite is much larger than that of metal and alloy magnetic materials, and it has a higher dielectric function. The magnetic function of ferrite also exhibits high permeability at high frequencies. Therefore, ferrite has become an ordinary non-metallic magnetic material for high-frequency and weak-current applications. Because the magnetic energy stored in the unit volume of ferrite is low, the saturation magnetization is also low (usually only 1/3 to 1/5 of pure iron), which limits its use in low-frequency and high-voltage applications that require higher magnetic energy density. And the use of great power with limits.

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