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Dongguan magnet products co. , LTD. Three factors influencing the ndfeb magnet

by:Maghard      2020-09-11
Dongguan magnet products co. , LTD. Factors influencing the ndfeb magnet 3 according to the observation of the magnetic domain structure and macroscopic magnetic measurement, control of nd-fe-b magnet coercive force of pinning theory, the thought of grain boundary about domain wall pinning effect. Grain boundaries of rich Nd thin layers which have the function of the attraction domain wall, thus become a nail pierced parts of the domain wall motion. Grain boundary, vacancy and dislocation metal defects is domain wall pinning center, their presence will limit domain wall displacement, thus improve the magnet coercive force. Commonly used magnet magnetic parameters of soft magnetic materials & middot; Saturated magnetic induction intensity of Bs: its size depends on the material composition, it corresponds to the physical state of magnetization vector lined up inside the material; · Residual magnetic induction intensity Br: it is the magnetic hysteresis characteristic parameters of on-line H back to zero when the value of B. Rectangular than: Br/Bs; · Coercive force Hc: it is said, the ease of magnetization of the material quantity depends on the material composition and defects ( Impurities, stress, etc. ) ; · Permeability m: is the magnetic hysteresis at any point on the line corresponds to the ratio of B and H, is closely related to the device working state; · Initial permeability mi, maximum permeability mm, amplitude permeability differential permeability md, ma, effective permeability me, pulse permeability mp; · Curie temperature Tc: magnet magnetization varies with temperature drop, reaches a certain temperature, spontaneous magnetization disappear, into a paramagnetic, the critical temperature for the Curie temperature. It determines the upper limit of magnetic device work temperature; · P loss: hysteresis losses Ph and eddy current loss Pe Ph + P = = af + bf2 + Pe cPeμ F2t2 / r to reduce hysteresis losses Ph method is to reduce the coercive force Hc; Method to reduce eddy current loss Pe is thinning the thickness of the magnetic materials increase the resistivity of the material in t and r; · In a free still air loss and the core of the core temperature relationship is: the total power dissipation ( Recommend her watts) / surface area ( Square centimeters) Magnet company is the specialized production ( Ndfeb) Powerful magnet company, has factories in dongguan city based wangniudun pier town. Magnet products used in toys, jewelry, crafts gifts, handmade gift box, leather handbags invisible magnetic button, plastic hardware products, audio equipment and other industries. Our company is located in dongguan city based wangniudun block cao beijiao town five chung village industrial zone, the company can provide customers 24 hours delivery, 36 hours to the customers specifications template. Magnet experts will find magnet products co. , LTD. , dongguan city, pack your satisfaction, more information you can view our company website/magnet. This article rigorous reproduced, if there are any violation, the consequence is proud! / dongguan magnet products co. , LTD. , magnets, powerful magnets, profiled magnets, magnet factory, dongguan magnet products co. , LTD
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