NL6904043A - 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
NL6904043A
NL6904043A NL6904043A NL6904043A NL6904043A NL 6904043 A NL6904043 A NL 6904043A NL 6904043 A NL6904043 A NL 6904043A NL 6904043 A NL6904043 A NL 6904043A NL 6904043 A NL6904043 A NL 6904043A
Authority
NL
Netherlands
Prior art keywords
submicroscopic
perm
needles
metallic particles
pref
Prior art date
Application number
NL6904043A
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 filed Critical
Priority to NL6904043A priority Critical patent/NL6904043A/en
Priority to BE747337D priority patent/BE747337A/en
Priority to DE2011936A priority patent/DE2011936C3/en
Priority to FR7009040A priority patent/FR2041076A1/en
Publication of NL6904043A publication Critical patent/NL6904043A/en

Links

Classifications

    • 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
    • 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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)

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.
NL6904043A 1969-03-15 1969-03-15 Submicroscopic metallic particles in the - form of needles and capable of being perm NL6904043A (en)

Priority Applications (4)

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
BE747337D BE747337A (en) 1969-03-15 1970-03-13 PROCESS FOR THE PREPARATION OF SUB-MICROSCOPIC METAL PARTICLES IN THE SHAPE OF NEEDLES AND PERMANENTLY MAGNETABLE
DE2011936A DE2011936C3 (en) 1969-03-15 1970-03-13 Process for producing acicular, submicroscopic, permanently magnetizable particles
FR7009040A FR2041076A1 (en) 1969-03-15 1970-03-13 Submicroscopic metallic particles in the - form of needles and capable of being perm

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
NL6904043A true NL6904043A (en) 1970-09-17

Family

ID=19806425

Family Applications (1)

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

Country Status (1)

Country Link
NL (1) NL6904043A (en)

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