FR2041076A1 - Submicroscopic metallic particles in the - form of needles and capable of being perm - Google Patents

Submicroscopic metallic particles in the - form of needles and capable of being perm

Info

Publication number
FR2041076A1
FR2041076A1 FR7009040A FR7009040A FR2041076A1 FR 2041076 A1 FR2041076 A1 FR 2041076A1 FR 7009040 A FR7009040 A FR 7009040A FR 7009040 A FR7009040 A FR 7009040A FR 2041076 A1 FR2041076 A1 FR 2041076A1
Authority
FR
France
Prior art keywords
submicroscopic
perm
needles
metallic particles
pref
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
FR7009040A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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
Priority claimed from NL6904043A external-priority patent/NL6904043A/en
Priority claimed from NL6904453A external-priority patent/NL6904453A/xx
Application filed by Stamicarbon BV filed Critical Stamicarbon BV
Publication of FR2041076A1 publication Critical patent/FR2041076A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
    • 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
    • B22F1/14—Treatment of metallic powder
    • B22F1/145—Chemical treatment, e.g. passivation or decarburisation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/36—Methods for preparing oxides or hydroxides in general by precipitation reactions in aqueous solutions
    • C01B13/363—Mixtures of oxides or hydroxides by precipitation
    • 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
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • 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
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/065—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder obtained by a reduction
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like

Abstract

An aq. solution containing salts of Co + Fe2, Co + Ni, of Co + Fe2 + Ni., has its pH value steadily raised with agitation and control of temp. to form a precipitate which is reduced in a liquid phase after separation of the solution. Specif. reduction may be effected with boron hydride or hypophosphites in an aq. or alcoholic medium with pH >6.5; or in a polar liquids with alkaline hydride or alkaline Al hydrides or alcoyls. Over the metal powder obtained may be passed a mixture of an inert gas containing 0.5-1.0% O2 (pref. is not >0.2%) and an inert gas containing 0.5-5.0% N2O(pref. is not 2.0%) over a period of 20 hrs.
FR7009040A 1969-03-15 1970-03-13 Submicroscopic metallic particles in the - form of needles and capable of being perm Withdrawn FR2041076A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6904043A NL6904043A (en) 1969-03-15 1969-03-15 Submicroscopic metallic particles in the - form of needles and capable of being perm
NL6904453A NL6904453A (en) 1969-03-22 1969-03-22

Publications (1)

Publication Number Publication Date
FR2041076A1 true FR2041076A1 (en) 1971-01-29

Family

ID=26644413

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7009040A Withdrawn FR2041076A1 (en) 1969-03-15 1970-03-13 Submicroscopic metallic particles in the - form of needles and capable of being perm

Country Status (3)

Country Link
BE (1) BE747337A (en)
DE (1) DE2011936C3 (en)
FR (1) FR2041076A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934351A1 (en) * 1989-10-14 1991-04-18 Studiengesellschaft Kohle Mbh METHOD FOR PRODUCING MICROCRYSTALLINE TO AMORPHOUS METAL OR ALLOY POWDER AND WITHOUT PROTECTIVE COLLOID IN ORGANIC SOLVENTS SOLVED METALS OR. ALLOYS
DE59603454D1 (en) * 1995-05-26 1999-12-02 Goldschmidt Ag Th Process for the production of X-ray amorphous and nanocrystalline metal powder

Also Published As

Publication number Publication date
DE2011936B2 (en) 1978-08-24
BE747337A (en) 1970-09-14
DE2011936A1 (en) 1970-10-15
DE2011936C3 (en) 1979-04-19

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Legal Events

Date Code Title Description
ST Notification of lapse