GB1004748A - Improvements in methods of manufacturing sintered ferrite bodies - Google Patents

Improvements in methods of manufacturing sintered ferrite bodies

Info

Publication number
GB1004748A
GB1004748A GB31511/64A GB3151164A GB1004748A GB 1004748 A GB1004748 A GB 1004748A GB 31511/64 A GB31511/64 A GB 31511/64A GB 3151164 A GB3151164 A GB 3151164A GB 1004748 A GB1004748 A GB 1004748A
Authority
GB
United Kingdom
Prior art keywords
cooling
atmosphere
oxygen content
zinc
ferrite
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.)
Expired
Application number
GB31511/64A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1004748A publication Critical patent/GB1004748A/en
Expired legal-status Critical Current

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

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%.
GB31511/64A 1963-08-05 1964-08-04 Improvements in methods of manufacturing sintered ferrite bodies Expired GB1004748A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1004748A true GB1004748A (en) 1965-09-15

Family

ID=19754941

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31511/64A Expired GB1004748A (en) 1963-08-05 1964-08-04 Improvements in methods of manufacturing sintered ferrite bodies

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Families Citing this family (1)

* 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPS412836B1 (en) 1966-02-22
NL296282A (en)
LU46680A1 (en) 1964-10-03
FR1403510A (en) 1965-06-18
BE651395A (en) 1965-02-04
SE301523B (en) 1968-06-10
ES302762A1 (en) 1965-01-01
DE1471349A1 (en) 1969-02-27
CH464377A (en) 1968-10-31
AT252592B (en) 1967-02-27
DK116384B (en) 1970-01-05

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