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Ndfeb magnet in magnetic resonance imaging applications

by:Newland     2020-05-09
Ndfeb magnet, as the latest result of the development of rare earth permanent magnet materials, because of their excellent magnetic, known as 'magnetic king'. Nd ndfeb magnet is neodymium, an alloy of iron oxide, etc. Also called magnetic steel. Ndfeb magnets with high magnetic energy product and JiaoLi, at the same time the advantages of high energy density makes the ndfeb permanent magnet material 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. The advantage of 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. Ndfeb magnet advantages: 1, ndfeb magnet products of high precision, a molding can meet the accuracy requirements, without too much after processing. 2, ndfeb magnet magnetic fine: magnetic energy product is three times as much as heterosexual ferrite, and intrinsic coercive force, high volume production magnetic stability, good consistency. 3, good temperature stability, working temperature is 150 ℃. 4, good corrosion resistance, good surface quality, product surface with epoxy coating and the most advanced Parylene coating, good corrosion resistance, the surface is bright and clean and beautiful, no blister, cracking, flaking, flash, the phenomenon such as grain. Traditional applications (ndfeb magnet Speaker, choose, permanent motor, VCM, MRI, etc. ) Market penetration is high, there is steady demand growth, annual growth rate from 5% to 10%; The new applications ( Wind power, frequency conversion air conditioning, energy-saving elevator, hybrid cars, car EPS steering motor) Is the main power to promote the development of ndfeb magnet industry. Now the nuclear magnetic resonance (NMR) imaging is the ratio of precision high-tech diagnostic instruments than CT. The various elements of human cells nucleus are nuclear magnetic moment, the strong magnetic field can produce resonance, because human normal cells with diseased cells tissue resonance time is different, scanned for precision analysis of the image data, to reflect the early small lesions. But the device needs to have a powerful magnetic field system to support. Superconducting magnets are equipped with cost relatively high cryogenic system, installation and maintenance is very complex; Ordinary ferrite magnets are hundreds of tons of magnets to assemble, very big very bulky. If the magnet - king - - - - - - - - - - - - Ndfeb magnets will not say to the big, bulky, can be finished two tons of magnet, one hundred tons and 3 tons of contrast, is certainly a lot of smaller volume, under the condition of the guarantee ratio of equal, small light-duty.
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