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1.发明公开Superparamagnetic fine particles of iron oxide and magnetic recording media containing said particles 失效超顺磁性氧化铁和含有它们的磁记录介质的微粒。
公开(公告)号：EP0443840A1
公开(公告)日：1991-08-28
申请号：EP91301362.9
申请日：1991-02-20
申请人： TODA KOGYO CORP.
CPC分类号： G11B5/712 , G11B5/70694 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/2991 , Y10T428/2993
摘要： Superparamagnetic fine particles of iron oxide, suitable for use in a magnetic recording medium, have an unsaturated fatty acid adsorbed on the surface thereof, a magnetization of not less than 50 Am²/kg (50 emu/g), a rate of change of magnetization of not more than 10%, and an Fe²⁺ content (calculated as a Fe²⁺:Fe³⁺ molar ratio) of from 0.16 to 0.5:1.
摘要翻译： 氧化铁的超顺磁性微粒，适合于在磁记录介质使用时，必须不饱和脂肪酸吸附在其表面上，的磁化不小于50上午<2> /公斤（为50emu / g）的速率 的不超过10％，和Fe的<2> <+>内容磁化的变化（计算为一个的Fe <2> <+>的Fe <3> <+>摩尔比）从零时16分至0.5：第一
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公开(公告)号：EP0708379A2
公开(公告)日：1996-04-24
申请号：EP95307044.8
申请日：1995-10-04
申请人： TODA KOGYO CORP.
CPC分类号： G03G9/10 , G03G9/107 , G03G9/1133 , G03G9/1137 , G03G9/1139
摘要： Spherical composite particles for use as a magnetic carrier for electrophotography have a number average particle diameter of from 1 to 1000 µm and comprise ferromagnetic iron compound particles, non-magnetic metal oxide particles and a phenol-based resin as a binder resin, the total amount of said ferromagnetic iron compound particles and said non-magnetic metal oxide particles being from 80 to 99 wt% and the ratio of the number-average particle diameter of said non-magnetic metal oxide particles and the number-average particle diameter of said ferromagnetic iron compound particles being more than 1.0:1.
摘要翻译： 用作电子照相用磁性载体的球形复合颗粒的数均粒径为1-1000μm，包含铁磁性铁化合物颗粒，非磁性金属氧化物颗粒和作为粘合剂树脂的酚类树脂，总计 所述铁磁性铁化合物颗粒和所述非磁性金属氧化物颗粒的量为80至99重量％，并且所述非磁性金属氧化物颗粒的数均粒径与所述铁磁性颗粒的数均粒径之比 铁化合物颗粒大于1.0：1。
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公开(公告)号：EP0708379B1
公开(公告)日：1999-08-04
申请号：EP95307044.8
申请日：1995-10-04
申请人： TODA KOGYO CORP.
CPC分类号： G03G9/10 , G03G9/107 , G03G9/1133 , G03G9/1137 , G03G9/1139
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公开(公告)号：EP0708379A3
公开(公告)日：1996-05-01
申请号：EP95307044.8
申请日：1995-10-04
申请人： TODA KOGYO CORP.
CPC分类号： G03G9/10 , G03G9/107 , G03G9/1133 , G03G9/1137 , G03G9/1139
摘要： Spherical composite particles for use as a magnetic carrier for electrophotography have a number average particle diameter of from 1 to 1000 µm and comprise ferromagnetic iron compound particles, non-magnetic metal oxide particles and a phenol-based resin as a binder resin, the total amount of said ferromagnetic iron compound particles and said non-magnetic metal oxide particles being from 80 to 99 wt% and the ratio of the number-average particle diameter of said non-magnetic metal oxide particles and the number-average particle diameter of said ferromagnetic iron compound particles being more than 1.0:1.
摘要翻译： 用作电子照相用磁性载体的球形复合颗粒具有1至1000μm的数均粒径并且包含铁磁性铁化合物颗粒，非磁性金属氧化物颗粒和酚基树脂作为粘合剂树脂，总量 的所述铁磁性铁化合物颗粒和所述非磁性金属氧化物颗粒的含量为80-99重量％，所述非磁性金属氧化物颗粒的数均颗粒直径与所述铁磁性铁的数均颗粒直径之比 化合物颗粒大于1.0：1。
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5.发明授权Superparamagnetic fine particles of iron oxide and magnetic recording media containing said particles 失效超顺磁性氧化铁和含有它们的磁记录介质的微粒。
公开(公告)号：EP0443840B1
公开(公告)日：1995-04-19
申请号：EP91301362.9
申请日：1991-02-20
申请人： TODA KOGYO CORP.
CPC分类号： G11B5/712 , G11B5/70694 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/2991 , Y10T428/2993
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