GB1185425A - Improvements in or relating to the Manufacture of Ferromagnetic Lithium-Zinc Ferrite Cores. - Google Patents

Improvements in or relating to the Manufacture of Ferromagnetic Lithium-Zinc Ferrite Cores.

Info

Publication number
GB1185425A
GB1185425A GB45430/68A GB4543068A GB1185425A GB 1185425 A GB1185425 A GB 1185425A GB 45430/68 A GB45430/68 A GB 45430/68A GB 4543068 A GB4543068 A GB 4543068A GB 1185425 A GB1185425 A GB 1185425A
Authority
GB
United Kingdom
Prior art keywords
mins
per cent
mole per
over
furnace
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
GB45430/68A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1185425A publication Critical patent/GB1185425A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2616—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing lithium

Abstract

1,185,425. Magnetic compositions. SIEMENS A.G.. 25 Sept., 1968 [26 Sept., 1967], No. 45430/68. Heading H1H. A square loop LiZn ferrite core is produced by (a) introducing core pressings of a pre-sintered mixture of composition 3À5-15 mole per cent ZnO 10-16 mole per cent Li 2 O 70-81 mole per cent Fe 2 O 3 (the total oxides being 100 mole per cent) in N 2 over 10-30 mins. into a furnace heated to 880-960‹ C.: (b) sintering in O 2 for 15-60 mins. at 880- 960‹ C; (c) heating up to 1060-1220‹ C. in O 2 over 10-30 mins. and sintering in O 2 at this temperature for up to 60 ruins.; (d) cooling in O 2 in the furnace to 880-960‹ C. over 20-30 mins., and optionally holding this temperature for up to 60 ruins.; and (e) removing the cores from the furnace either rapidly in a few mins. in O 2 or slowly in up to 10 mins. in N 2 . The starting mixture may be presintered for 2 hours at 550-800‹ C.
GB45430/68A 1967-09-26 1968-09-25 Improvements in or relating to the Manufacture of Ferromagnetic Lithium-Zinc Ferrite Cores. Expired GB1185425A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1671071A DE1671071C3 (en) 1967-09-26 1967-09-26 Method of making a ferromagnetic !! Lithium zinc ferrite core

Publications (1)

Publication Number Publication Date
GB1185425A true GB1185425A (en) 1970-03-25

Family

ID=5686382

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45430/68A Expired GB1185425A (en) 1967-09-26 1968-09-25 Improvements in or relating to the Manufacture of Ferromagnetic Lithium-Zinc Ferrite Cores.

Country Status (4)

Country Link
US (1) US3637504A (en)
DE (1) DE1671071C3 (en)
FR (1) FR1581909A (en)
GB (1) GB1185425A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL170678C (en) * 1970-06-26 1982-12-01 Philips Nv METHOD FOR MANUFACTURING A MAGNETIC CORE OF A SOFT MAGNETIC FERRITE
US6835463B2 (en) * 2002-04-18 2004-12-28 Oakland University Magnetoelectric multilayer composites for field conversion

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB754370A (en) * 1953-07-20 1956-08-08 Svend Holm A ceramic magnetic material
NL290005A (en) * 1963-03-08
US3370011A (en) * 1963-08-02 1968-02-20 Hitachi Ltd Lithium magnesium ferrite memory core material

Also Published As

Publication number Publication date
FR1581909A (en) 1969-09-19
DE1671071C3 (en) 1974-09-12
DE1671071B2 (en) 1974-02-07
DE1671071A1 (en) 1971-09-09
US3637504A (en) 1972-01-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees