GB940163A - Method of preparing substantially cobalt-free ferrite material - Google Patents
Method of preparing substantially cobalt-free ferrite materialInfo
- Publication number
- GB940163A GB940163A GB18705/61A GB1870561A GB940163A GB 940163 A GB940163 A GB 940163A GB 18705/61 A GB18705/61 A GB 18705/61A GB 1870561 A GB1870561 A GB 1870561A GB 940163 A GB940163 A GB 940163A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- sintering
- inert atmosphere
- ferrites
- quenching
- 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
- 239000000463 material Substances 0.000 title abstract 5
- 229910000859 α-Fe Inorganic materials 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 238000005245 sintering Methods 0.000 abstract 5
- 238000010438 heat treatment Methods 0.000 abstract 3
- 238000010791 quenching Methods 0.000 abstract 3
- 230000000171 quenching effect Effects 0.000 abstract 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 238000003303 reheating Methods 0.000 abstract 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract 1
- 238000000137 annealing Methods 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 239000011572 manganese Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 238000010583 slow cooling Methods 0.000 abstract 1
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
- H01F1/12—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 soft-magnetic materials
- H01F1/34—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 soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
-
- 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
-
- 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
- C04B35/2666—Other ferrites containing nickel, copper or cobalt
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
Abstract
940,163. Magnetic compositions. AMPEX CORPORATION. May 24, 1961 [June 10, 1960], No. 18705/61. Heading H1H. A method of preparing cobalt free ferrites includes the steps of (a) sintering a mixture of constituent materials, (b) performing a further heat treatment step to increase the oxygen content, (c) magnetically annealing the material by heating to a temperature between 200 C. and the Curie temperature, applying a magnetic field and cooling the material in the field. Manganese ferrous and nickel ferrous ferrites with square hysteresis loops may be formed, and the sintering may take place between 1150 C. and 1450 C. in an inert atmosphere, e.g. N, A, He or CO 2 . The further heat treatment step may take several forms, viz. (a) slow cooling of the material to a temperature 200-500 C. below the sintering temperature (at 200 C./ hour) optionally holding this temperature and quenching to room temperature all in the inert atmosphere, (b) quickly quenching to room temperature, reheating to a temperature between 200 C. and 500 C. below the sintering temperature and requenching all in an inert atmosphere, (c) quenching after sintering in an inert atmosphere, reheating in air to a temperature between 500 C. and 900 C. for about 15 minutes and cooling. Magnetic cores exhibiting square hysteresis loops may be formed, the magnetic field being applied by a threading wire, a solenoid or a magnet. The inert atmosphere may be N 3 , A, He or CO 2 . Specific ferrites, temperatures and field strengths are mentioned.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US35120A US3055832A (en) | 1960-06-10 | 1960-06-10 | Magnetically annealed ferrite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB940163A true GB940163A (en) | 1963-10-23 |
Family
ID=21880768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18705/61A Expired GB940163A (en) | 1960-06-10 | 1961-05-24 | Method of preparing substantially cobalt-free ferrite material |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3055832A (en) |
| DE (1) | DE1696386B1 (en) |
| FR (1) | FR1290781A (en) |
| GB (1) | GB940163A (en) |
| NL (1) | NL124005C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3242089A (en) * | 1962-08-20 | 1966-03-22 | Western Electric Co | Heat-treating method for modifying permeability and quality factor of nickel-zinc-cobalt ferrite |
| US3234136A (en) * | 1962-12-26 | 1966-02-08 | Ibm | Method for producing square loop nickel ferrous ferrite |
| DE1646997B1 (en) * | 1965-08-10 | 1972-06-29 | Siemens Ag | PROCESS FOR MANUFACTURING A FERROMAGNETIC SWITCH CORE FROM FERRITE WITH A RECTANGULAR HYSTERESIS LOOP |
| FR2432754A1 (en) * | 1978-08-01 | 1980-02-29 | Thomson Csf | METHOD FOR MANUFACTURING A DIELECTRIC MATERIAL WITH INSULATING BARRIERS DISTRIBUTED BY VOLUME, FOR USE AT HIGH VOLTAGE, AND ELECTRONIC DEVICE MADE WITH THIS MATERIAL |
| US5838215A (en) * | 1996-02-05 | 1998-11-17 | Motorola, Inc. | RF choke with a low Q core formed by sintering ferrous and ferric oxides |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1976230A (en) * | 1930-12-25 | 1934-10-09 | Mitsubishi Electric Corp | Permanent magnet and method of manufacturing same |
| US2579978A (en) * | 1946-03-27 | 1951-12-25 | Hartford Nat Bank & Trust Co | Soft ferromagnetic material and method of making same |
| BE514600A (en) * | 1951-10-04 | |||
| DK105170C (en) * | 1955-06-30 | 1966-08-29 | Siemens Ag | Process for the production of magnetizable ferrite cores. |
| NL96342C (en) * | 1955-10-20 |
-
1960
- 1960-06-10 US US35120A patent/US3055832A/en not_active Expired - Lifetime
-
1961
- 1961-05-24 GB GB18705/61A patent/GB940163A/en not_active Expired
- 1961-06-02 NL NL265534A patent/NL124005C/xx active
- 1961-06-03 FR FR863832A patent/FR1290781A/en not_active Expired
- 1961-06-09 DE DE19611696386 patent/DE1696386B1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3055832A (en) | 1962-09-25 |
| NL265534A (en) | |
| DE1696386B1 (en) | 1970-07-09 |
| NL124005C (en) | |
| FR1290781A (en) | 1962-04-13 |
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