-
公开(公告)号：US3894970A
公开(公告)日：1975-07-15
申请号：US34480373
申请日：1973-03-26
Applicant: IBM
Inventor： ADAMS GENEVIEVE MARIE , CROWLEY JOHN IRVING , LARSON KEITH HARRIS
CPC classification number: G11B5/70668
Abstract: A method of making a high temperature stable ferromagnetic material comprising gamma Fe2O3 and between 0.08 to 5% by weight based on weight of Fe2O3 of a cation chosen from the group having a cation size at least substantially that of Na and less than that of Cs . Typically, the cation is chosen from the group consisting of sodium, potassium, or calcium. Magnetic and temperature stability can be achieved to temperatures in excess of 700*C before the cubic gamma magnetic brown iron oxide converts to the alpha rhombehedral red nonmagnetic iron oxide.
Abstract translation: 制造包含γ-Fe 2 O 3的高温稳定的铁磁材料的方法和基于选自阳离子尺寸至少基本上为Na +且小于Na +的阳离子的Fe 2 O 3的重量计为0.08至5重量％的方法。 的Cs +。 通常，阳离子选自钠，钾或钙。 磁性和温度稳定性可以达到超过700℃的温度，之后立方体γ磁性棕色氧化铁转换成α菱形红色非磁性氧化铁。
-
公开(公告)号：DE3472024D1
公开(公告)日：1988-07-14
申请号：DE3472024
申请日：1984-03-16
Applicant: IBM
Inventor： AFZALI-ARDAKANI ALI , CROWLEY JOHN IRVING , WU ANTHONY WAI
IPC: G11B5/72 , C08G65/333 , C08J7/04 , C10M107/30 , C10M107/38 , C10N30/06 , C10N40/18 , C10N60/00 , C10N70/00 , G11B5/725 , G11B5/84 , G11B23/50
Abstract: A lubricant is chemically bonded to an information carrying solid surface by contacting the surface with a diazoketone-terminated polymeric lubricant and decomposing said diazoketone-terminated polymeric lubricant to form a carbene which reacts with the solid surface.
-
Search Results
2
records
(took 0.016 seconds)
