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The difference between the ndfeb magnets and ferrite magnet and process problems

by:Newland     2020-05-04
The advantage of sintered ndfeb magnet 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. Belongs to the third generation of rare earth permanent magnet materials of sintered ndfeb magnet, has small volume, light weight and the characteristics of the magnetic strength, is currently the best price-performance magnets, the magnetic field is known as the king of magnetic. The advantages of high energy density makes permanent magnetic material in modern industry and obtained widespread application in electronic technology. Under the conditions of bare magnetic, magnetic force can reach about 3500 gauss. Ferrite 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. Is belong to nonmetallic magnetic materials, magnetic ferric oxide and other one or more metal oxide compound oxide ( Or is ferrite) 。 Magnetic usually is 800 - 1000 gauss, often used in the speakers, speakers and other devices. From process of sintered ndfeb magnet, sintered ndfeb and adhesive ndfeb, we mainly speak of sintered ndfeb. Process of sintered ndfeb magnet is as follows: process: ingredients to smelting tableting, pulverizing to molding, sintering and tempering magnetic detection to grinding to pin cutting processing, electroplating, finished product. The ingredients are the foundation, sintering tempering is the key. Sintered ndfeb magnet production tools: there was melting furnace, a broken machine, ball mill, jet mill, pressing molding machine, vacuum packaging machine, such as static pressure machine, sintering furnace, vacuum heat treatment furnace, magnetic tester, gauss meter. Sintered ndfeb magnet processing tools: is there a special slicing machine, cutting machine, flat grinding machine, double-sided machine, punching machine, chamfering machine, electroplating equipment. Features: nd-fe-b materials based on Nd2Fe14B intermetallic compounds of permanent magnetic material, high magnetic energy product and JiaoLi, at the same time the advantages of high energy density is in modern industry and the wide application of electronic technology, so that the instruments and meters, electronic motor, magnetization of the magnetic separation equipment miniaturization, lightweight, thin become possible. Material characteristics: sintered ndfeb magnet has the advantage of 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.
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