NL7310054A - Werkwijze ter bereiding van ferromagnetisch chroomdioxyde. - Google Patents
Werkwijze ter bereiding van ferromagnetisch chroomdioxyde.Info
- Publication number
- NL7310054A NL7310054A NL7310054A NL7310054A NL7310054A NL 7310054 A NL7310054 A NL 7310054A NL 7310054 A NL7310054 A NL 7310054A NL 7310054 A NL7310054 A NL 7310054A NL 7310054 A NL7310054 A NL 7310054A
- Authority
- NL
- Netherlands
- Prior art keywords
- preparing ferromagnetic
- chrome dioxide
- dioxide
- ferromagnetic chrome
- preparing
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
- G11B5/70636—CrO2
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/02—Oxides or hydrates thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/74—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by peak-intensities or a ratio thereof only
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2647472A IT956993B (it) | 1972-06-30 | 1972-06-30 | Procedimento per ottenere biossi do di cromo ferromagnetico a caratteristiche granulometriche e magnetiche variabil |
| IT2647572A IT956994B (it) | 1972-06-30 | 1972-06-30 | Preparazione di biossido di cromo ferromagnetico con caratteristiche granulometriche e magnetiche varia bili entro vasti limiti e nuovo biossido di cromo con caratteristi che granulometriche particolari |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7310054A true NL7310054A (nl) | 1975-01-21 |
Family
ID=26328678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7310054A NL7310054A (nl) | 1972-06-30 | 1973-07-19 | Werkwijze ter bereiding van ferromagnetisch chroomdioxyde. |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3911095A (nl) |
| JP (1) | JPS4964598A (nl) |
| BE (1) | BE801730A (nl) |
| CA (1) | CA990050A (nl) |
| DE (1) | DE2332854A1 (nl) |
| FR (1) | FR2190735B1 (nl) |
| GB (1) | GB1437978A (nl) |
| NL (1) | NL7310054A (nl) |
| SE (1) | SE389220B (nl) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4311770A (en) * | 1977-10-04 | 1982-01-19 | Agence Nationale De Valorisation De La Recherche (Anvar) | Novel ferromagnetic chromium dioxide and rhodium dioxide material and its preparation |
| FR2433483A2 (fr) * | 1978-08-18 | 1980-03-14 | Anvar | Materiau ferromagnetique a base de dioxyde de chrome et de dioxyde de rhodium et son obtention |
| US4161409A (en) * | 1978-03-06 | 1979-07-17 | Louis Schiffman | Corrosion inhibitive pigment |
| US4252758A (en) * | 1979-03-14 | 1981-02-24 | Akira Yamaguchi | Method of Producing a sintered chromium oxide body |
| DE3513723A1 (de) * | 1985-04-17 | 1986-10-23 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von ferromagnetischem chromdioxid |
| US4698220A (en) * | 1986-03-28 | 1987-10-06 | E. I. Du Pont De Nemours And Company | Partitioned reduction process for ferromagnetic chromium dioxide |
| US5047079A (en) * | 1986-08-18 | 1991-09-10 | Ici Americas Inc. | Method of preparation and use of solid, phytoactive compositions |
| US4769165A (en) * | 1987-01-20 | 1988-09-06 | E. I. Du Pont De Nemours And Company | Process for synthesis of ferromagnetic chromium dioxide |
| DE3718299A1 (de) * | 1987-05-30 | 1988-12-15 | Basf Ag | Verfahren zur herstellung von stabilisiertem nadelfoermigem ferromagnetischem chromdioxid |
| DE3837646A1 (de) * | 1988-11-05 | 1990-05-10 | Basf Ag | Nadelfoermiges, im wesentlichen aus chromdioxid bestehendes, ferromagnetisches material |
| DE4339841A1 (de) * | 1993-11-23 | 1995-05-24 | Basf Magnetics Gmbh | Feinteiliges nadfelförmiges magnetisches modifiziertes Chromdioxid |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3243260A (en) * | 1961-06-12 | 1966-03-29 | Matsushita Electric Ind Co Ltd | Method for preparing cro2 of rutile type crystalline structure |
| US3278263A (en) * | 1964-11-27 | 1966-10-11 | Du Pont | Ferromagnetic chromium dioxide and preparation thereof |
| GB1168190A (en) * | 1967-08-10 | 1969-10-22 | Matsushita Electric Ind Co Ltd | A method for making Ferromagnetic Chromium Dioxide |
| US3529930A (en) * | 1968-02-13 | 1970-09-22 | Du Pont | Process for improving ferromagnetic properties of chromium dioxide by heating in an oxidizing environment |
| DE1922409A1 (de) * | 1969-05-02 | 1970-11-12 | Bayer Ag | Verfahren zur Herstellung von ferromagnetischem Chromdioxid |
-
1973
- 1973-06-27 SE SE7309026A patent/SE389220B/xx unknown
- 1973-06-28 US US374650A patent/US3911095A/en not_active Expired - Lifetime
- 1973-06-28 DE DE2332854A patent/DE2332854A1/de active Pending
- 1973-06-29 FR FR7323857A patent/FR2190735B1/fr not_active Expired
- 1973-06-29 GB GB3122473A patent/GB1437978A/en not_active Expired
- 1973-06-29 CA CA175,272A patent/CA990050A/en not_active Expired
- 1973-06-29 BE BE132970A patent/BE801730A/xx unknown
- 1973-06-30 JP JP48074309A patent/JPS4964598A/ja active Pending
- 1973-07-19 NL NL7310054A patent/NL7310054A/nl not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| SE389220B (sv) | 1976-10-25 |
| FR2190735B1 (nl) | 1975-08-22 |
| BE801730A (fr) | 1974-01-02 |
| JPS4964598A (nl) | 1974-06-22 |
| GB1437978A (en) | 1976-06-03 |
| DE2332854A1 (de) | 1974-01-17 |
| US3911095A (en) | 1975-10-07 |
| FR2190735A1 (nl) | 1974-02-01 |
| CA990050A (en) | 1976-06-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BV | The patent application has lapsed |