SHEET MAGNET HAVING MICROCRYSTALLINE STRUCTURE AND METHOD OF MANUFACTURING THE SAME AND METHOD OF MANUFACTURING ISOTROPIC PERMANENT MAGNET POWDER

摘要

The present invention has a residual magnetic flux density (Br) is less than 10kG, strong magnetic has a cost effectiveness on the same ferrite magnets as in the characteristics, a thin film having a thickness of 70 to 300㎛ contributing to thinning and miniaturization of the magnetic circuit, It relates to a magnet and a method of manufacturing the same. When using a cooling roll having a predetermined peripheral speed for the molten alloy of a rare earth element content of the low selection tissue under vacuum in an inert gas atmosphere of less than 30kPa continuously cast, 90% of the crystal structure has -Fe and Nd ₂ Fe ₁₄ B is varied in the crystal structure that is a Fe ₃ B compound is mixed with a compound having a crystal structure. As a result, iHc 2kOe, Br