SE301523B - - Google Patents

Info

Publication number
SE301523B
SE301523B SE9386/64A SE938664A SE301523B SE 301523 B SE301523 B SE 301523B SE 9386/64 A SE9386/64 A SE 9386/64A SE 938664 A SE938664 A SE 938664A SE 301523 B SE301523 B SE 301523B
Authority
SE
Sweden
Prior art keywords
cooling
atmosphere
oxygen content
zinc
ferrite
Prior art date
Application number
SE9386/64A
Inventor
D Perduijn
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of SE301523B publication Critical patent/SE301523B/xx

Links

Classifications

    • 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
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

1,004,748. Magnetic compositions. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Aug. 4, 1964 [Aug. 5, 1963], No. 31511/64. Heading H1H. A manganese-zinc ferrite is made by a process which includes a complex sintering schedule to achieve the desired oxygen content of the final material. In particular, a method of making a MnZn ferrite comprises presintering a mixture of oxides or equivalent compounds the mixture consisting of 24À5-28À5mol. %MnO, 53-54 mol. % Fe 2 0 3 and balance ZnO, cooling and pulverizing the presintered product, forming a shaped body, sintering between 1370‹ and 1430‹ C. in an atmosphere containing 95% O 2 for between 15 minutes and 3 hours, then cooling the sintered body, initiating a gradual reduction of the oxygen content when the body is between 1250‹ and 1310‹ C., continuing the reduction of oxygen so that at 1150‹ C. the atmosphere contains less than 0.2% 0 2 and cooling to room temperature in this atmosphere, providing means for controlling the evaporation of zinc (e.g. by placing in a ferrite pot of the same composition as the body, or by adding zinc vapour to the atmosphere), heating the body to between 1250‹ and 1310‹ C. in an atmosphere containing between 0.05 and 1% O 2 and maintaining this for 5-10 hours, and cooling to room temperature while the oxygen content does not exceed 0.1%.
SE9386/64A 1963-08-05 1964-08-03 SE301523B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL296282 1963-08-05

Publications (1)

Publication Number Publication Date
SE301523B true SE301523B (en) 1968-06-10

Family

ID=19754941

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9386/64A SE301523B (en) 1963-08-05 1964-08-03

Country Status (12)

Country Link
JP (1) JPS412836B1 (en)
AT (1) AT252592B (en)
BE (1) BE651395A (en)
CH (1) CH464377A (en)
DE (1) DE1471349A1 (en)
DK (1) DK116384B (en)
ES (1) ES302762A1 (en)
FR (1) FR1403510A (en)
GB (1) GB1004748A (en)
LU (1) LU46680A1 (en)
NL (1) NL296282A (en)
SE (1) SE301523B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0400716A1 (en) * 1989-05-26 1990-12-05 Koninklijke Philips Electronics N.V. Soft magnetic magnesium-manganese-zinc-ferrite material and products thereof
CN114085086A (en) * 2021-11-02 2022-02-25 宝钢磁业（江苏）有限公司 Sintering process of iron-rich ultrahigh Bs material

Also Published As

Publication number Publication date
LU46680A1 (en) 1964-10-03
JPS412836B1 (en) 1966-02-22
GB1004748A (en) 1965-09-15
DK116384B (en) 1970-01-05
ES302762A1 (en) 1965-01-01
NL296282A (en)
AT252592B (en) 1967-02-27
BE651395A (en) 1965-02-04
DE1471349A1 (en) 1969-02-27
FR1403510A (en) 1965-06-18
CH464377A (en) 1968-10-31

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