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公开(公告)号:US3443977A
公开(公告)日:1969-05-13
申请号:US3443977D
申请日:1967-11-13
Applicant: PFIZER & CO C
Inventor: BENNETCH LEONARD M
CPC classification number: C09C1/34 , C01P2002/02 , C09C1/0009 , C09D5/084
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公开(公告)号:US3407034A
公开(公告)日:1968-10-22
申请号:US46457265
申请日:1965-06-16
Applicant: PFIZER & CO C
Inventor: BENNETCH LEONARD M
IPC: C01B25/37
CPC classification number: C01B25/375
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公开(公告)号:US3904540A
公开(公告)日:1975-09-09
申请号:US37063373
申请日:1973-06-18
Applicant: PFIZER
Inventor: BENNETCH LEONARD M , GREINER HARRY S , HANCOCK KENNETH R , HOFFMAN MARK
CPC classification number: G11B5/70663 , C01G49/06 , C01P2004/10 , C01P2004/51 , C01P2004/54 , C01P2004/61 , C01P2006/40 , C01P2006/42 , G11B5/70 , G11B5/70647 , G11B5/70652
Abstract: A magnetic impulse record member comprising a binding medium and synthetic magnetic gamma ferric oxide, said member having an orientation ratio of at least 2.4 in a 1000 oersted field, said ferric oxide produced from synthetic lepidocrocite by coating same with at least one 8-24 carbon atom hydrophobic aliphatic monocarboxylic acid, reducing and oxidizing the coated lepidocrocite, and mechanically densifying the gamma ferric oxide product, said synthetic lepidocrocite having very fine-grained, needle-like crystalline particles at least 70 percent of which have a length to width ratio greater than 10:1 and a length up to 2 microns.
Abstract translation: 一种磁脉冲记录元件,包括粘结介质和合成磁性γ氧化铁,所述元件在1000奥斯特菲尔德场中具有至少2.4的取向比,所述氧化铁由合成的石灰石产生,通过用至少一种8-24碳 原子疏水性脂族单羧酸,还原和氧化涂覆的lepidocrocite,以及机械致密化γ氧化铁产物,所述合成的lepidococite具有非常细粒度的针状结晶颗粒,其至少70%的长宽比大于 10:1,长度可达2微米。
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公开(公告)号:US3395983A
公开(公告)日:1968-08-06
申请号:US48825065
申请日:1965-09-17
Applicant: PFIZER & CO C
Inventor: BENNETCH LEONARD M
CPC classification number: C09C1/24 , C01G49/06 , C01P2006/80
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