公开(公告)号：WO1989011154A1

公开(公告)日：1989-11-16

申请号：PCT/US1989001901

申请日：1989-05-05

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  YUDELSON, Joseph, Samuel

IPC: H01F01/37

CPC classification number: G01N33/5434 ,  B03C1/01 ,  G01N2446/20 ,  G01N2446/30 ,  G01N2446/66 ,  G01N2446/84 ,  H01F1/445 ,  Y10T428/2991 ,  Y10T428/2998

Abstract: Stable, encapsulated superparamagnetic magnetite particles having a narrow particle size distribution with average particle diameters in the range of from 50 Å to 350 Å are prepared by forming an aqueous dispersion of magnetite particles having the above particle size characteristics in the presence of a surfactant, coacervating a mixture of gelatin and a carboxyl containing hydrophilic polymer such as gum arabic to form a thin coating of coacervate on the magnetite particles and crosslinking the coacervate coating with a gelatin hardener such as glutaraldehyde.

公开(公告)号：WO1995005669A1

公开(公告)日：1995-02-23

申请号：PCT/US1993007682

申请日：1993-08-12

Applicant: ADVANCED MAGNETICS, INC.

Inventor： ADVANCED MAGNETICS, INC. ,  PALMACCI, Stephen ,  JOSEPHSON, Lee ,  GROMAN, Ernest, V.

IPC: H01F01/37

CPC classification number: H01F1/445 ,  A61K49/1809 ,  A61K49/1863

Abstract: In a method for the synthesis of a colloid including a superparamagnetic metal oxide coated with a polymer, an acidic solution of a metal salt and a polymer may be cooled, and then neutralized by the controlled addition of a cool solution of a base, and may then be converted, by the application of heat, to a homogenous superparamagnetic metal oxide colloid. According to a preferred embodiment, the polymer may be a polysaccharide. In a further embodiment of the invention, the polysaccharide may be dextran and the metal salt may be ferrous and ferric salts, which produces, according to the methods of the invention, a superparamagnetic iron oxide colloid with an extended plasma half-line.

Abstract translation: 在合成包含用聚合物涂覆的超顺磁金属氧化物的胶体的方法中，可以将金属盐和聚合物的酸性溶液冷却，然后通过控制加入碱的冷溶液中和，并且可以 然后通过加热转化成均匀的超顺磁金属氧化物胶体。 根据优选的实施方案，聚合物可以是多糖。 在本发明的另一个实施方案中，多糖可以是葡聚糖，并且金属盐可以是亚铁和铁盐，其根据本发明的方法产生具有延长的等离子体半线的超顺磁性氧化铁胶体。

公开(公告)号：WO1997004469A1

公开(公告)日：1997-02-06

申请号：PCT/JP1996002040

申请日：1996-07-22

Applicant: TOKIN CORPORATION ,  YOSHIDA, Shigeyoshi ,  SATO, Mitsuharu ,  SUGAWARA, Eishu ,  SHIMADA, Yutaka

Inventor： TOKIN CORPORATION

IPC: H01F01/37

CPC classification number: H05K9/0083 ,  H01F1/22 ,  H01F1/24 ,  H01F1/26 ,  H01F1/37 ,  H01L23/552 ,  H01L23/66 ,  H01L2924/0002 ,  H01L2924/3011 ,  H05K1/0233 ,  H05K1/0373 ,  H05K2201/086 ,  H05K2201/10689 ,  H01L2924/00

Abstract: A composite magnetic material used for a product that effectively eliminates electromagnetic interference in radio-frequency electronic appliances, particularly mobile communication equipment. The composite magnetic material is a nonconductor comprising soft magnetic powder and an organic binder, and it can be in magnetic resonance in at least two directions with at least two different magnetic fields (Hk) having different magnitudes.

Abstract translation: 一种用于产品的复合磁性材料，其有效地消除了射频电子设备，特别是移动通信设备中的电磁干扰。 复合磁性材料是包含软磁性粉末和有机粘合剂的非导体，并且其可以在至少两个具有不同量值的不同磁场（Hk）的至少两个方向上处于磁共振。

公开(公告)号：WO1990015423A1

公开(公告)日：1990-12-13

申请号：PCT/US1990003177

申请日：1990-06-05

Applicant: OMNI QUEST CORPORATION

Inventor： OMNI QUEST CORPORATION ,  CHAGNON, Mark, S.

IPC: H01F01/37

CPC classification number: H01F1/442 ,  H01F1/44

Abstract: Electrically-conductive superparamagnetic liquid colloids and methods for making and using them are described. The magnetic liquid colloids contain magnetic particles coated with a conductive, organo-metallic compound, which impart the magnetic and conductive characteristics to the fluid. The coated magnetic particles are dispersed in a carrier fluid that gives the fluid viscosity, flow and vapor pressure properties.

Abstract translation: 介绍了导电超顺磁性液体胶体及其制备和使用方法。 磁性液体胶体含有涂覆有导电性有机金属化合物的磁性颗粒，其赋予流体磁性和导电特性。 涂覆的磁性颗粒分散在载体流体中，其赋予流体粘度，流动和蒸气压特性。