发明授权
US06398863B1 Spindle-shaped hematite particles and process for making spindle-shaped hematite particles 失效
锭状赤铁矿颗粒和制造纺锤形赤铁矿颗粒的方法

  • 专利标题: Spindle-shaped hematite particles and process for making spindle-shaped hematite particles
  • 专利标题(中): 锭状赤铁矿颗粒和制造纺锤形赤铁矿颗粒的方法
  • 申请号: US09920796
    申请日: 2001-08-03
  • 公开(公告)号: US06398863B1
    公开(公告)日: 2002-06-04
  • 发明人: Kenji OkinakaMasaaki Maekawa
  • 申请人: Kenji OkinakaMasaaki Maekawa
  • 优先权: JP10-315080 19981105; JP10-344410 19981203
  • 主分类号: C09C124
  • IPC分类号: C09C124
Spindle-shaped hematite particles and process for making spindle-shaped hematite particles
摘要:
Spindle-shaped hematite particles obtained form the spindle-shaped goethite particles, can be prevented as highly as possible from causing destruction of particle shape when subjected to a heat-reduction step for producing magnetic spindle-shaped metal particles and magnetic spindle-shaped metal particles containing iron as a main component produced from the spindle-shaped goethite particles or the spindle-shaped hematite particles as a starting material, exhibit a high coercive force, an excellent particle coercive force distribution, a large saturation magnetization and an excellent oxidation stability, and are excellent in a squareness (Br/Bm) of the sheet due to a good dispersibility in a binder resin.
信息查询
0/0