Nd-Fe-B BASED PRESSURIZED SINTERED MAGNET AND METHOD OF MANUFACTURING THE SAME

摘要

To provide a hollow cylindrical pressurized sintered magnet in which axial anisotropy is suppressed even at high density.SOLUTION: An Nd-Fe-B based pressurized sintered magnet has relative density of 95% or more and has a hollow cylindrical shape. Residual magnetic flux density (Br) measured in a radial direction (vertical direction) of a cylinder and residual magnetic flux density (Br) measured in an axial direction (parallel direction) of the cylinder are 0.6 T or more and 1.1 T or less and a thickness of the cylinder in the radial direction is 1.7 mm or less.SELECTED DRAWING: Figure 3