WO1999046782A3 - Ferromagnetic particles - Google Patents

Ferromagnetic particles Download PDF

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Publication number
WO1999046782A3
WO1999046782A3 PCT/NL1999/000116 NL9900116W WO9946782A3 WO 1999046782 A3 WO1999046782 A3 WO 1999046782A3 NL 9900116 W NL9900116 W NL 9900116W WO 9946782 A3 WO9946782 A3 WO 9946782A3
Authority
WO
WIPO (PCT)
Prior art keywords
ferromagnetic particles
core
ferromagnetic metal
ferromagnetic
particles
Prior art date
Application number
PCT/NL1999/000116
Other languages
French (fr)
Other versions
WO1999046782A2 (en
Inventor
John Wilhelm Geus
Original Assignee
Univ Utrecht
U Cat B V
John Wilhelm Geus
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Utrecht, U Cat B V, John Wilhelm Geus filed Critical Univ Utrecht
Priority to EP99909404A priority Critical patent/EP1062672A2/en
Priority to JP2000536082A priority patent/JP2002507055A/en
Priority to AU28610/99A priority patent/AU2861099A/en
Publication of WO1999046782A2 publication Critical patent/WO1999046782A2/en
Publication of WO1999046782A3 publication Critical patent/WO1999046782A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/18—Carbon
    • B01J35/33—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/16—Metallic particles coated with a non-metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/0036—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties showing low dimensional magnetism, i.e. spin rearrangements due to a restriction of dimensions, e.g. showing giant magnetoresistivity
    • H01F1/0045—Zero dimensional, e.g. nanoparticles, soft nanoparticles for medical/biological use
    • H01F1/0054—Coated nanoparticles, e.g. nanoparticles coated with organic surfactant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/0036—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties showing low dimensional magnetism, i.e. spin rearrangements due to a restriction of dimensions, e.g. showing giant magnetoresistivity
    • H01F1/0072—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties showing low dimensional magnetism, i.e. spin rearrangements due to a restriction of dimensions, e.g. showing giant magnetoresistivity one dimensional, i.e. linear or dendritic nanostructures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
    • H01F1/442—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids the magnetic component being a metal or alloy, e.g. Fe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
    • C22C2026/002—Carbon nanotubes

Abstract

The present invention relates to ferromagnetic metal particles comprising a core of a ferromagnetic metal or metal alloy, wherein the surface of the core is covered entirely with a layer of graphitic carbon.
PCT/NL1999/000116 1998-03-09 1999-03-04 Ferromagnetic particles WO1999046782A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99909404A EP1062672A2 (en) 1998-03-09 1999-03-04 Ferromagnetic particles
JP2000536082A JP2002507055A (en) 1998-03-09 1999-03-04 Ferromagnetic particles
AU28610/99A AU2861099A (en) 1998-03-09 1999-03-04 Ferromagnetic particles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1008528 1998-03-09
NL1008528A NL1008528C2 (en) 1998-03-09 1998-03-09 Ferromagnetic particles.

Publications (2)

Publication Number Publication Date
WO1999046782A2 WO1999046782A2 (en) 1999-09-16
WO1999046782A3 true WO1999046782A3 (en) 1999-10-21

Family

ID=19766693

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1999/000116 WO1999046782A2 (en) 1998-03-09 1999-03-04 Ferromagnetic particles

Country Status (6)

Country Link
EP (1) EP1062672A2 (en)
JP (1) JP2002507055A (en)
AU (1) AU2861099A (en)
NL (1) NL1008528C2 (en)
WO (1) WO1999046782A2 (en)
ZA (1) ZA991800B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6986942B1 (en) 1996-11-16 2006-01-17 Nanomagnetics Limited Microwave absorbing structure
US6815063B1 (en) 1996-11-16 2004-11-09 Nanomagnetics, Ltd. Magnetic fluid
US6713173B2 (en) 1996-11-16 2004-03-30 Nanomagnetics Limited Magnetizable device
GB2319253A (en) 1996-11-16 1998-05-20 Eric Leigh Mayes Composition, for use in a device, comprising a magnetic layer of domain-separated magnetic particles
GB9927911D0 (en) * 1999-11-25 2000-01-26 Nanomagnetics Ltd Magnetic fluid
DE10025964A1 (en) * 2000-05-25 2001-12-06 Henkel Kgaa Heterogeneous catalyst based on magnetic carrier, useful in oxidation of organic compounds, e.g. epoxidation, allows easy catalyst separation
GB0200260D0 (en) * 2002-01-07 2002-02-20 Inst Of Applied Catalysis The Microparticles and methods of making them
US7597936B2 (en) 2002-11-26 2009-10-06 University Of Utah Research Foundation Method of producing a pigmented composite microporous material
WO2004048936A2 (en) * 2002-11-26 2004-06-10 University Of Utah Research Foundation Microporous materials, methods, and articles for localizing and quantifying analytes
US7285329B2 (en) 2004-02-18 2007-10-23 Hitachi Metals, Ltd. Fine composite metal particles and their production method, micro-bodies, and magnetic beads
JP5556756B2 (en) * 2004-02-27 2014-07-23 日立金属株式会社 Iron-based nano-sized particles and method for producing the same
WO2009015890A2 (en) * 2007-07-31 2009-02-05 Dws Synthesetechnik Dr. Peter Wilharm Catalytically active magnetic nanoparticles
US10279328B2 (en) * 2009-02-27 2019-05-07 Basf Corporation Process for the preparation of metal-carbon containing bodies
EP2233207A1 (en) 2009-02-27 2010-09-29 Basf Se Process for the preparation of metal-carbon containing bodies
JP4824095B2 (en) * 2009-03-12 2011-11-24 株式会社栗本鐵工所 Magnetorheological fluid
EP2383374A1 (en) 2010-04-29 2011-11-02 BASF Corporation Nano-particles containing carbon and a ferromagnetic metal or alloy
JP5892421B2 (en) * 2012-02-16 2016-03-23 日立金属株式会社 Metal powder, manufacturing method thereof, and dust core
JP6107804B2 (en) * 2014-12-26 2017-04-05 株式会社豊田中央研究所 Coating liquid, dust core, powder for magnetic core and method for producing the same
CN115814789B (en) * 2022-11-25 2024-03-29 安徽师范大学 Coated Pd-based catalyst, preparation method thereof and method for treating hexavalent chromium in water body
CN117123281B (en) * 2023-08-03 2024-03-26 宁夏大学 Long-acting catalyst of carbon-coated Fe-Ni alloy, and preparation method and application thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0269904A (en) * 1988-09-05 1990-03-08 Mitsubishi Petrochem Co Ltd Manufacture of modified magnetic metal powder
WO1995001643A1 (en) * 1993-06-30 1995-01-12 Carnegie Mellon University Metal, alloy, or metal carbide nanoparticles and a process for forming same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5597531A (en) * 1985-10-04 1997-01-28 Immunivest Corporation Resuspendable coated magnetic particles and stable magnetic particle suspensions

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0269904A (en) * 1988-09-05 1990-03-08 Mitsubishi Petrochem Co Ltd Manufacture of modified magnetic metal powder
WO1995001643A1 (en) * 1993-06-30 1995-01-12 Carnegie Mellon University Metal, alloy, or metal carbide nanoparticles and a process for forming same

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
BRUNSMAN E M ET AL: "MAGNETIC PROPERTIES OF CARBON-COATED, FERROMAGNETIC NANOPARTICLES PRODUCED BY A CARBON-ARC METHOD", JOURNAL OF APPLIED PHYSICS, vol. 75, no. 10, PART 02A, 15 May 1994 (1994-05-15), pages 5882 - 5884, XP000486887 *
JEYADEVAN B ET AL: "OXIDATION PROTECTIVE CARBON LAYER FOR MAGNETIC PARTICLES BY SURFACTANT REDUCTION", IEEE TRANSACTIONS ON MAGNETICS, vol. 32, no. 5, 1 September 1996 (1996-09-01), pages 4511 - 4513, XP000634054 *
M.HOOGENRAAD: "Growth and Utilization of Carbon fibrils", 25 November 1995, UNIVERSITEIT UTRECHT, UTRECHT NL, XP002080353 *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 248 (E - 0933) 28 May 1990 (1990-05-28) *
TURGUT Z ET AL: "MAGNETIC EVIDENCE FOR STRUCTURAL-PHASE TRANSFORMATIONS IN FE-CO ALLOY NANOCRYSTALS PRODUCED BY A CARBON ARC", JOURNAL OF APPLIED PHYSICS, vol. 81, no. 8, PART 02A, 15 April 1997 (1997-04-15), pages 4039 - 4041, XP000702734 *

Also Published As

Publication number Publication date
AU2861099A (en) 1999-09-27
JP2002507055A (en) 2002-03-05
WO1999046782A2 (en) 1999-09-16
ZA991800B (en) 1999-10-04
NL1008528C2 (en) 1999-09-10
EP1062672A2 (en) 2000-12-27

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