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公开(公告)号：US09627111B2
公开(公告)日：2017-04-18
申请号：US13508616
申请日：2010-11-09
CPC分类号： H01F1/0018 , B22F1/0018 , B82Y25/00 , B82Y30/00 , H01F1/0054 , H01F1/0063 , H01F3/08
摘要： A magnetic member includes a plurality of superparamagnetic particles held by the magnetic member. Each of the plurality of superparamagnetic particles is formed with a particle size which is set at least such that a Neel relaxation time τn in the each of the superparamagnetic particles becomes shorter than a cycle P of an alternating current magnetic field applied to the magnetic member (τn
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2.发明授权Composition and method of making a ferrofluid having an improved chemical stability 有权制备具有改善的化学稳定性的铁磁流体的组成和方法公开(公告)号：US06261471B1
公开(公告)日：2001-07-17
申请号：US09418892
申请日：1999-10-15
申请人： Shiro Tsuda , Yasutake Hirota , Hisao Suzuki
发明人： Shiro Tsuda , Yasutake Hirota , Hisao Suzuki
IPC分类号： C04B128
CPC分类号： H01F1/44
摘要： The invention relates to a composition and a process for producing a magnetic fluid comprising finely divided magnetic particles covered with at least one surfactant. A fluorocarbon-silane surface modifier is employed which is added to cover the free oxidizable exterior surface of the outer layer of the particles to increase the acid resistance of the colloid.
摘要翻译： 本发明涉及包含用至少一种表面活性剂覆盖的细碎磁性颗粒的磁性流体的组合物和方法。 使用碳氟硅烷表面改性剂，其加入以覆盖颗粒外层的游离可氧化外表面以增加胶体的耐酸性。
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公开(公告)号：US6056889A
公开(公告)日：2000-05-02
申请号：US948951
申请日：1997-10-10
CPC分类号： H01F1/44
摘要： The invention relates to a composition and a process for producing a chemically stable magnetic fluid comprising finely divided magnetic particles covered with surfactants. A surface modifier is also employed which is added to cover thoroughly the free oxidizable exterior surface of the outer layer of the particles to assure better chemical stability of the colloid under different environmental conditions.
摘要翻译： 本发明涉及一种用于生产化学稳定的磁性流体的组合物和方法，其包括用表面活性剂覆盖的细碎磁性颗粒。 还使用表面改性剂，其被完全覆盖颗粒外层的可氧化的外表面，以确保在不同环境条件下胶体的更好的化学稳定性。
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公开(公告)号：US20120229238A1
公开(公告)日：2012-09-13
申请号：US13508616
申请日：2010-11-09
CPC分类号： H01F1/0018 , B22F1/0018 , B82Y25/00 , B82Y30/00 , H01F1/0054 , H01F1/0063 , H01F3/08
摘要： A magnetic member includes a plurality of superparamagnetic particles held by the magnetic member. Each of the plurality of superparamagnetic particles is formed with a particle size which is set at least such that a Neel relaxation time τn in the each of the superparamagnetic particles becomes shorter than a cycle P of an alternating current magnetic field applied to the magnetic member (τn
摘要翻译： 磁性构件包括由磁性构件保持的多个超顺磁性颗粒。 多个超顺磁性粒子中的每一个形成为至少使得每个超顺磁性粒子中的Neel弛豫时间τn比施加到磁性部件的交流磁场的周期P短的粒径 当磁性部件用作电子部件时，τn
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公开(公告)号：US06277298B1
公开(公告)日：2001-08-21
申请号：US09429189
申请日：1999-10-28
申请人： Lucian Borduz , Shiro Tsuda , Yasutake Hirota
发明人： Lucian Borduz , Shiro Tsuda , Yasutake Hirota
IPC分类号： H01F128
CPC分类号： H01F1/44
摘要： The invention relates to a composition and process for producing a chemically stable magnetic fluid comprising a plurality of magnetic particles covered first with a small molecular weight surface modifier, which is a nondispersant and acts as a surfactant-accepting layer, and then with at least one surfactant. The surface modifier/surfactant coated magnetic particles are then suspended in a silicone oil-based, hydrocarbon oil-based or an ester oil-based carrier liquid.
摘要翻译： 本发明涉及一种用于生产化学稳定的磁性流体的组合物和方法，其包括首先用小分子量表面改性剂覆盖的多个磁性颗粒，所述小分子量表面改性剂是非分散性的并且用作表面活性剂接受层，然后与至少一种 表面活性剂。 然后将表面改性剂/表面活性剂涂覆的磁性颗粒悬浮在硅油基烃油或酯油基载体液体中。
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