ANISOTROPIC RARE EARTH SINTERED MAGNET AND METHOD FOR MANUFACTURING THE SAME,申请号JP20100243417-传众专利搜索

ANISOTROPIC RARE EARTH SINTERED MAGNET AND METHOD FOR MANUFACTURING THE SAME

申请公布号：JP2012099523(A)

申请号：JP20100243417

申请日期：2010.10.29

申请公布日期：2012.05.24

申请人：

SHIN ETSU CHEM CO LTD

发明人：OHASHI TAKESHI

分类号：H01F41/02;B22F3/00;B22F3/02;C22C33/02;C22C38/00;H01F1/057;H01F1/08

主分类号：H01F41/02

摘要：<P>PROBLEM TO BE SOLVED: To provide an anisotropic rare earth sintered magnet having a tetragonal R<SB POS="POST">2</SB>Fe<SB POS="POST">14</SB>B compound (R is one or more kinds of rare earth elements mainly consisting of Nd) as a main magnetic phase, and two oriented axes of c-axis and a-axis being crystal axes of the compound phase crystal. <P>SOLUTION: Orientation control of two axes of a magnetization easy axis, c-axis, and a magnetization hard axis, a-axis, which are crystal axes of the main phase of Nd magnet powder can fabricate a magnet with a biaxially oriented sintered body when applying a magnetic field during molding in a magnetic field. Orientation of the two axes of c-axis and a-axis of respective sintered grains smoothly connects the sintered grains through a nonmagnetic grain boundary phase, and smooths shapes in vicinities of grain boundary surfaces. Consequently, Hc with an Hcj of 1.6 MA/m or more can be realized without addition of Dy and/or Tb. <P>COPYRIGHT: (C)2012,JPO&INPIT