发明授权
- 专利标题： Polycrystalline ferrite and a magnetic head using the same
- 专利标题（中）： 多晶铁素体及使用其的磁头
-
申请号： US625353申请日： 1984-06-27
-
公开(公告)号： US4521323A公开(公告)日： 1985-06-04
- 发明人: Ken Hirota , Yoshiaki Fujimoto , Kouichi Watanabe , Minoru Sugimura
- 申请人： Ken Hirota , Yoshiaki Fujimoto , Kouichi Watanabe , Minoru Sugimura
- 申请人地址： JPX Osaka
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JPX Osaka
- 主分类号： C04B35/26
- IPC分类号： C04B35/26 ; C04B35/30 ; C04B35/38
摘要：
A polycrystalline ferrite containing Na, Zr and Ca in amounts of 0.01 to 0.5% by weight, 0.005 to 0.5% by weight and 0.01 to 0.5% by weight respectively, in Mn-Zn or Ni-Zn ferrite to thereby enhance the toughness of said ferrite. Said ferrite is suited for a magnetic head with improved mechanical strength and excellent fine workability.
公开/授权文献
- US5713384A Tableted detergent, method of manufacture and use 公开/授权日：1998-02-03