GB803625A - Improvements in or relating to magnetisable cores made of sintered oxides and methods of manufacturing such cores - Google Patents
Improvements in or relating to magnetisable cores made of sintered oxides and methods of manufacturing such coresInfo
- Publication number
- GB803625A GB803625A GB2016756A GB2016756A GB803625A GB 803625 A GB803625 A GB 803625A GB 2016756 A GB2016756 A GB 2016756A GB 2016756 A GB2016756 A GB 2016756A GB 803625 A GB803625 A GB 803625A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cooling
- mno
- sintering
- cores
- nio
- 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
Links
- 238000000034 method Methods 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 7
- 238000001816 cooling Methods 0.000 abstract 6
- 239000000463 material Substances 0.000 abstract 6
- 239000000203 mixture Substances 0.000 abstract 6
- 238000005245 sintering Methods 0.000 abstract 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 2
- 239000003570 air Substances 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910000428 cobalt oxide Inorganic materials 0.000 abstract 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 229910052745 lead Inorganic materials 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- 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
- C04B35/2625—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 magnesium
-
- 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
- H01F1/0313—Oxidic compounds
- H01F1/0315—Ferrites
Abstract
803,625. Magnetic compositions. SIEMENS & HALSKE, A. G. June 29, 1956 [June 30, 1955; Sept. 28, 1955; Nov. 15, 1955; March 9, 1956], No. 20167/56. Class 38 (2). [Also in Groups XXXVI and XL (b)] A magnetizable core is made by sintering a mixture of powdered oxides and then slowly cooling it to below 100‹ C. from above the highest Curie temperature of the phases included in the sintered material, the mixture including more than 50 mol. per cent of iron oxide, 0.2-5 mol. per cent of cobalt oxide, and at least one oxide of Ni, Mn, Cu, Mg, Cr, Pb and Zn. The material exhibits a hysteresis loop which is substantially a line enclosing negligible area at low field intensities, Fig. 1a, and is a loop constricted in the middle at a medium range of field intensities, Figs. 1b 1 Two phases have been identified comprising crystallites of grain size 1-3 microns and 10-50 microns respectively. Examples are described where small percentages of CoO are added to mixtures of Fe 2 O 8 ; NiO, MnO, ZnO; Fe 2 O 3 , MgO, MnO, ZnO; Fe 2 O 3 ,MgO,MnO; Fe 2 0 3 , MnO ; Fe 2 0 3 , NiO, ZnO and Fe 2 O 3 , NiO, MnO. The mixture is sintered for 2-3 hours at specified temperatures which are all close to 1250‹ C. and thereafter cooled slowly to room temperature. Various conditions of cooling are specified, e.g. cooling in 40, 24 or 16 hours overall and cooling at different speeds over different parts of the range. The cooling may be carried out in an atmosphere such as air, nitrogen or oxygen, which may be changed during the process. After cooling, the material may be tempered in air for 1 hour at 500‹ or 550‹ C. and again cooled slowly. A lower sintering temperature of 1000-1400‹ C. is chosen if CuO is used. The required characteristics can be expected if the composition has the following constitution, in mol. per cent: 50-80 Fe 2 0 3 , 8-50 Ni, 0-35 Zn, 0-40 Mn and 0.2-5 Co. The cores may be formed by pressing, extruding or moulding before or after sintering. The material may be ground and formed after sintering, and should be tempered and recooled after each mechanical operation. A cable may be loaded by a tape coated or impregnated with the material powdered and mixed with a binder or by a cylinder coated with an insulating or metal layer, Fig. 5 (not shown). Alternatively, a hair-pin shaped conductor may carry two cylinders of the material, Fig. 3 (not shown), or be threaded through two holes in a single cylinder, Fig. 4 (not shown).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES44574A DE1195656B (en) | 1955-06-30 | 1955-06-30 | Process for the production of magnetizable ferrite cores |
| DES45772A DE1204993B (en) | 1955-09-28 | 1955-09-28 | Process for the production of magnetizable ferrite cores |
| DES0046367 | 1955-11-15 | ||
| DE1956S0047869 DE1261202B (en) | 1956-03-09 | 1956-03-09 | Magnetizable body made of magnetizable oxides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB803625A true GB803625A (en) | 1958-10-29 |
Family
ID=27437482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2016756A Expired GB803625A (en) | 1955-06-30 | 1956-06-29 | Improvements in or relating to magnetisable cores made of sintered oxides and methods of manufacturing such cores |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH381592A (en) |
| DK (1) | DK105170C (en) |
| FR (1) | FR1170711A (en) |
| GB (1) | GB803625A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3055832A (en) * | 1960-06-10 | 1962-09-25 | Ampex | Magnetically annealed ferrite material |
| US3232877A (en) * | 1960-12-06 | 1966-02-01 | Csf | Nickel ferrite containing cobalt and manganese |
| DE1696456B1 (en) * | 1965-03-24 | 1970-11-12 | Telefunken Patent | Process for the production of a substoechiometric ferrite with an almost rectangular, temperature-stable hysteresis loop for switching ring cores |
| DE1796225B1 (en) * | 1967-09-26 | 1972-05-31 | Nippon Electric Co | METHOD FOR PRODUCING MN-ZN-FERRITE AS A MAGNETIC MATERIAL |
| GB2260539A (en) * | 1991-09-11 | 1993-04-21 | American Res Corp Virginia | Ferrimagnetic core materials for megahertz frequency high flux density transformers and inductors |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2707211A1 (en) * | 1977-02-19 | 1978-08-24 | Vacuumschmelze Gmbh | Coilless inductor system with wire axially placed inside magnetic tube - uses tube made of nickel-iron alloy and filled with magnesium oxide powder |
| US4803777A (en) * | 1984-08-07 | 1989-02-14 | Masayuki Nakagawa | Method of manufacturing an electric component with a lead wire secured in a through hole |
-
1956
- 1956-06-19 DK DK215656A patent/DK105170C/en active
- 1956-06-29 CH CH3488356A patent/CH381592A/en unknown
- 1956-06-29 GB GB2016756A patent/GB803625A/en not_active Expired
- 1956-06-30 FR FR1170711D patent/FR1170711A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3055832A (en) * | 1960-06-10 | 1962-09-25 | Ampex | Magnetically annealed ferrite material |
| US3232877A (en) * | 1960-12-06 | 1966-02-01 | Csf | Nickel ferrite containing cobalt and manganese |
| DE1696456B1 (en) * | 1965-03-24 | 1970-11-12 | Telefunken Patent | Process for the production of a substoechiometric ferrite with an almost rectangular, temperature-stable hysteresis loop for switching ring cores |
| DE1796225B1 (en) * | 1967-09-26 | 1972-05-31 | Nippon Electric Co | METHOD FOR PRODUCING MN-ZN-FERRITE AS A MAGNETIC MATERIAL |
| GB2260539A (en) * | 1991-09-11 | 1993-04-21 | American Res Corp Virginia | Ferrimagnetic core materials for megahertz frequency high flux density transformers and inductors |
| US5626789A (en) * | 1991-09-11 | 1997-05-06 | American Research Corp. Of Virginia | Ferrimagnetic core materials for megahertz frequency high flux density transformers and inductors |
| US6433299B1 (en) | 1991-09-11 | 2002-08-13 | American Research Corporation Of Virginia | Monolithic magnetic modules for integrated planar magnetic circuitry and process for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1170711A (en) | 1959-01-16 |
| CH381592A (en) | 1964-08-31 |
| DK105170C (en) | 1966-08-29 |
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