IL44013A - Process for the preparation of pulverulent or readily pulverisable alloys of rare earths with cobalt and apparatus for carrying out the same - Google Patents

Process for the preparation of pulverulent or readily pulverisable alloys of rare earths with cobalt and apparatus for carrying out the same

Info

Publication number
IL44013A
IL44013A IL44013A IL4401374A IL44013A IL 44013 A IL44013 A IL 44013A IL 44013 A IL44013 A IL 44013A IL 4401374 A IL4401374 A IL 4401374A IL 44013 A IL44013 A IL 44013A
Authority
IL
Israel
Prior art keywords
cobalt
oxide
rare earth
process according
reaction
Prior art date
Application number
IL44013A
Other versions
IL44013A0 (en
Original Assignee
Goldschmidt Ag Th
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 Goldschmidt Ag Th filed Critical Goldschmidt Ag Th
Publication of IL44013A0 publication Critical patent/IL44013A0/en
Publication of IL44013A publication Critical patent/IL44013A/en

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
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0433—Nickel- or cobalt-based alloys
    • C22C1/0441—Alloys based on intermetallic compounds of the type rare earth - Co, Ni
    • 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
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/02—Obtaining nickel or cobalt by dry processes
    • C22B23/021—Obtaining nickel or cobalt by dry processes by reduction in solid state, e.g. by segregation processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B59/00—Obtaining rare earth metals
    • 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
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/0553—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 obtained by reduction or by hydrogen decrepitation or embrittlement

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (16)

WHAT IS CLAIMED IS:
1. . A process for preparing a pulverulent or easily pulverizable alloy of a rare earth with cobalt which comprises co-reducing a mix¬ ture of a finely-divided oxide of a rare earth and finely-divided cobalt oxide with gaseous calcium at a temperature in the range of about 1000 —2 to 1400 ° C and a pressure of about ^ 10 Torr. , reducing the particle size of the resulting reaction product to <100^m, and separating the rare earth-cobalt alloy from by-products of the reaction.
2. A process according to claim 1 in which the rare earth-cobalt alloy is separated by treatment with aqueous acid .
3. A process according to claim 1 in which the rare earth-cobalt alloy is separated magnetically.
4. A process according to claim 1 in which the rare earth-cobalt alloy is separated by extraction.
5. A process according to claim 1 in which the gaseous calcium is prepared by the reaction of finely-divided calcium oxide with alumi¬ num powder at a temperature in the range of about 1000 to 1500 ° C .
6. A process according to claim 1 in which the atomic ratio of the rare earth oxide to cobalt oxide is about 1 : 3 to 1 : 9 .
7. A process according to claim 6 in which the atomic ratio is 1 : 5.
8. A process according to claim 1 in which the rare earth oxide is samarium oxide .
9. A proces s according to claim 1 in which cobalt oxide is partially replaced by cobalt powder. 44 1.! ·. / a.
10. A process according to claim 1 in which the mixture contains , in addition, up to 50 per cent by weight of calcium chloride .
11. . A process according to claim 1 in which the mixture contains , in addition , up to 10 per cent by weight of sulfur.
12. . A process according to claim 1 in which up to 60 mole per cent of cobalt oxide is replaced by an element selected from the group consisting of iron , nickel, manganese , and copper, or the oxides thereof .
13. A furnace for preparing a pulverulent or easily pulverizable according to claim 1 J alloy of a rare earth with cobalt/wRlch comprises reaction chamber means , means sealing said reaction chamber means from the atmos¬ phere , means for- evacuating said reaction chamber means , a pair of upwardly-open reaction vessel means in said reaction chamber means , said vessel means being positioned one above the other, a lining in said upper ves sel of a material inert at high tempera¬ tures to a reaction mixture therein, particularly calcium oxide, and means for individually heating said reaction vessel means .
14. A furnace according to claim 13 in which said lower vessel is adapted to contain a reaction mixture of calcium oxide and aluminum.
15. . A furance according to claim 13 in which said upper vessel is adapted to contain a reaction mixture of rare earth oxide and cobalt oxide .
16. A furnace according to claim 13 including pipe means for evac¬ uating said reaction chamber , said pipe means having an inside diame¬ ter not exceeding about 10 mm . 44015/2 7· A furnace according to claim 17 including cooling neans surrounding said pipe moans. 18· A furnace according? to clnita 13 ncludng enclosure means around said reaction cfcesher means, said enclosure means being adapted to be evacuated to a pressure of about 10""1 Torr. 19· A furnace for preparing a pulverulent or easily pulvericable alloy of a rara earth with cobalt substantially as herein described with reference to and as illustrated in the accompanying drawing.
IL44013A 1973-01-26 1974-01-16 Process for the preparation of pulverulent or readily pulverisable alloys of rare earths with cobalt and apparatus for carrying out the same IL44013A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2303697A DE2303697C2 (en) 1973-01-26 1973-01-26 Process for the production of alloy powders from rare earths and cobalt

Publications (2)

Publication Number Publication Date
IL44013A0 IL44013A0 (en) 1974-05-16
IL44013A true IL44013A (en) 1976-12-31

Family

ID=5869981

Family Applications (1)

Application Number Title Priority Date Filing Date
IL44013A IL44013A (en) 1973-01-26 1974-01-16 Process for the preparation of pulverulent or readily pulverisable alloys of rare earths with cobalt and apparatus for carrying out the same

Country Status (16)

Country Link
JP (1) JPS5316798B2 (en)
AT (1) AT336906B (en)
BE (1) BE808440A (en)
BR (1) BR7400498D0 (en)
CA (1) CA995497A (en)
CH (1) CH596322A5 (en)
CS (1) CS216666B2 (en)
DD (1) DD109237A5 (en)
DE (1) DE2303697C2 (en)
FI (1) FI59616C (en)
FR (1) FR2215480B1 (en)
GB (1) GB1438091A (en)
IL (1) IL44013A (en)
IT (1) IT1002760B (en)
NL (1) NL167730C (en)
SE (1) SE403624B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2631162C3 (en) * 1975-07-22 1980-04-30 N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) Process for the production of compounds of rare earth metals and cobalt, nickel, iron and / or copper
JPS5487630A (en) * 1977-12-26 1979-07-12 Fujitsu Ltd Method of producing rare earth cobalt magnet
JPS54102271A (en) * 1978-01-31 1979-08-11 Nippon Itsutoriumu Kk Production of rare earth elements containing alloy powder
JPS5823451B2 (en) * 1979-05-01 1983-05-16 住友特殊金属株式会社 Manufacturing method of rare earth cobalt magnet
US4331475A (en) * 1980-07-28 1982-05-25 Reading Alloys, Inc. Process for aluminothermic production of chromium and chromium alloys low in nitrogen
US4767450A (en) * 1984-11-27 1988-08-30 Sumitomo Special Metals Co., Ltd. Process for producing the rare earth alloy powders
JPS61295308A (en) * 1985-06-24 1986-12-26 Sumitomo Metal Mining Co Ltd Production of alloy powder containing rare earth metal
US4769063A (en) * 1986-03-06 1988-09-06 Sumitomo Special Metals Co., Ltd. Method for producing rare earth alloy
FR2607520B1 (en) * 1986-11-27 1992-06-19 Comurhex PROCESS FOR THE PRODUCTION BY METALLOTHERMY OF PURE ALLOYS BASED ON RARE EARTHS AND TRANSITION METALS
US5228930A (en) * 1989-07-31 1993-07-20 Mitsubishi Materials Corporation Rare earth permanent magnet power, method for producing same and bonded magnet
US5354354A (en) * 1991-10-22 1994-10-11 Th. Goldschmidt Ag Method for producing single-phase, incongruently melting intermetallic phases
CN108168294B (en) * 2017-12-18 2024-02-09 保定硼达新材料科技有限公司 Vacuum furnace
CN111500879B (en) * 2020-05-28 2021-07-27 清华大学 Method for extracting rare earth elements based on magnetic Janus particles
CN115623766A (en) * 2022-07-21 2023-01-17 中国科学院赣江创新研究院 Preparation method and application of a rare earth high frequency soft magnetic material

Also Published As

Publication number Publication date
FR2215480A1 (en) 1974-08-23
JPS5316798B2 (en) 1978-06-03
DD109237A5 (en) 1974-10-20
FI59616B (en) 1981-05-29
DE2303697B1 (en) 1973-12-06
JPS49104860A (en) 1974-10-03
DE2303697A1 (en) 1973-12-06
AT336906B (en) 1977-06-10
BR7400498D0 (en) 1974-10-29
DE2303697C2 (en) 1974-07-18
IL44013A0 (en) 1974-05-16
BE808440A (en) 1974-03-29
CH596322A5 (en) 1978-03-15
CS216666B2 (en) 1982-11-26
GB1438091A (en) 1976-06-03
FR2215480B1 (en) 1976-10-08
NL7401096A (en) 1974-07-30
SE403624B (en) 1978-08-28
FI59616C (en) 1981-09-10
CA995497A (en) 1976-08-24
NL167730C (en) 1982-01-18
IT1002760B (en) 1976-05-20
ATA63274A (en) 1976-09-15
NL167730B (en) 1981-08-17

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