| abstract |
A kind of R T B systems sintered magnet（100）, it is to use to contain R 2 T 14 Contain R obtained from the R T B systems alloy sheet of the crystal grain of B phases 2 T 14 The R T B systems sintered magnet of the particle of B phases（100）R T B systems alloy sheet crystal grain on the section along thickness direction radially extends from nucleus, the length average value of a surface side of the crystal grain on direction perpendicular with thickness direction in season and is respectively D with the average value of the length of another surface side of the face opposition side 1 And D 2 When, meet following formula（1）, the average grain diameter of particle is 0.5~5 μm, is substantially free of heavy rare earth element.0.9≦D 2 /D 1 ≦1.1 （1）. |