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公开(公告)号：US6024890A
公开(公告)日：2000-02-15
申请号：US101557
申请日：1998-07-13
CPC分类号： G11B5/70621 , H01F1/061 , Y10T428/12181 , Y10T428/2991 , Y10T428/2993
摘要： The present invention relates to phosphorus-containing ferromagnetic pigments comprising, in particular, from 30 to 70% by volume of a core, said core comprising essentially iron and cobalt, and from 30 to 70% of a shell, said shell comprising essentially aluminum, phosporus, silicon, oxygen, and optionally magnesium and sodium; the invention further relates to a process for preparation of said pigments, their use in magnetic recording materials and magnetic recording materials which contain such pigments.
摘要翻译： PCT No.PCT / EP97 / 00062 Sec。 371日期1998年7月13日第 102（e）日期1998年7月13日PCT 1997年1月9日PCT PCT。 公开号WO97 / 26666 日期1997年7月24日本发明涉及含铁铁磁性颜料，其特别包含30至70体积％的芯，所述芯基本上包含铁和钴，以及30-70％的壳，所述 壳基本上包括铝，磷，硅，氧，以及任选的镁和钠; 本发明还涉及制备所述颜料的方法，它们在磁记录材料中的应用和含有这种颜料的磁记录材料。
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公开(公告)号：US4981719A
公开(公告)日：1991-01-01
申请号：US380114
申请日：1989-07-14
摘要： An improved process for the production of a magnetic recording material including a non-magnetic layer support and, cast thereon, a magnetic dispersion including a mixture of at least two different batches of finely divided magnetic pigments finely dispersed in a polymeric binder is characterized in that the magnetic pigment batches are separately finely dispersed in a polymeric binder and/or a dispersion aid and/or a solvent until the necessary degree of dispersion is reached, after which they are combined, optionally provided with further additives and applied to the layer support, the degree of dispersion of the magnetic dispersions preferably being continuously determined by a colorimetric arrangement.
摘要翻译： 一种用于生产包括非磁性层载体的磁记录材料的改进方法，并且在其上铸造包括细分散在聚合物粘合剂中的至少两种不同批次的精细分散的磁性颜料的混合物的磁性分散体的特征在于， 将磁性颜料批料分别细分散在聚合物粘合剂和/或分散助剂和/或溶剂中，直至达到必要的分散度，然后将它们组合，任选地提供另外的添加剂并施加到层载体上， 优选通过比色装置连续测定磁性分散体的分散度。
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