DK137446B - Fremgangsmåde til fremstilling af ferromagnetisk chromdioxid. - Google Patents
Fremgangsmåde til fremstilling af ferromagnetisk chromdioxid.Info
- Publication number
- DK137446B DK137446B DK91872AA DK91872A DK137446B DK 137446 B DK137446 B DK 137446B DK 91872A A DK91872A A DK 91872AA DK 91872 A DK91872 A DK 91872A DK 137446 B DK137446 B DK 137446B
- Authority
- DK
- Denmark
- Prior art keywords
- production
- chromium dioxide
- ferromagnetic chromium
- ferromagnetic
- dioxide
- Prior art date
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
- H01F1/0313—Oxidic compounds
-
- 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
-
- 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
- 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
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/82—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
-
- 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
- C01P2004/62—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
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Magnetic Record Carriers (AREA)
- Chemical Treatment Of Metals (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2131671 | 1971-03-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK137446B true DK137446B (da) | 1978-03-06 |
| DK137446C DK137446C (no) | 1978-08-14 |
Family
ID=11179995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK91872AA DK137446B (da) | 1971-03-04 | 1972-02-29 | Fremgangsmåde til fremstilling af ferromagnetisk chromdioxid. |
Country Status (21)
| Country | Link |
|---|---|
| US (1) | US3929978A (no) |
| JP (1) | JPS515999B1 (no) |
| AT (1) | AT311923B (no) |
| AU (1) | AU452489B2 (no) |
| BE (1) | BE780219A (no) |
| BR (1) | BR7201246D0 (no) |
| CA (1) | CA960434A (no) |
| CH (1) | CH573361A5 (no) |
| CS (1) | CS152410B2 (no) |
| DD (1) | DD100925A5 (no) |
| DE (1) | DE2210059A1 (no) |
| DK (1) | DK137446B (no) |
| ES (1) | ES400413A1 (no) |
| FI (1) | FI53203C (no) |
| FR (1) | FR2128448B1 (no) |
| GB (1) | GB1343623A (no) |
| NL (1) | NL7202599A (no) |
| NO (1) | NO128866B (no) |
| PL (1) | PL83251B1 (no) |
| SE (1) | SE369185B (no) |
| ZA (1) | ZA721366B (no) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1012202B (it) | 1974-05-09 | 1977-03-10 | Montedison Spa | Procedimento per la produzione di biossido di cromo ferromagnetico |
| IT1042133B (it) * | 1975-08-28 | 1980-01-30 | Stoppani P & Co | Procedimento per il recupero e la valorizzazione degli scarti della fabbricazione dell anidri de cromica |
| GB1516774A (en) * | 1975-10-10 | 1978-07-05 | Anvar | Process for preparing chromium dioxide |
| IT1045191B (it) * | 1975-10-31 | 1980-05-10 | Montedison Spa | Procedimento per la produzione di biossido di cromo ferromagnetico |
| DE3536116A1 (de) * | 1985-10-10 | 1987-04-16 | Basf Ag | Verfahren zur stabilisierung von nadelfoermigem 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 |
| US4769165A (en) * | 1987-01-20 | 1988-09-06 | E. I. Du Pont De Nemours And Company | Process for synthesis of ferromagnetic chromium dioxide |
| DE3837646A1 (de) * | 1988-11-05 | 1990-05-10 | Basf Ag | Nadelfoermiges, im wesentlichen aus chromdioxid bestehendes, ferromagnetisches material |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3117093A (en) * | 1960-10-24 | 1964-01-07 | Du Pont | Process for the preparation of ferromagnetic chromium dioxide |
| FR1298581A (fr) * | 1961-07-12 | 1962-07-13 | Du Pont | Procédé de fabrication de bioxyde de chrome magnétique, produits obtenus et leur utilisation dans les éléments d'enregistrement magnétique |
| US3451771A (en) * | 1966-10-27 | 1969-06-24 | Du Pont | Preparation of ferromagnetic cro2 by heating cro3 in the presence of o2 and cr2o3 |
| US3486851A (en) * | 1967-03-01 | 1969-12-30 | Du Pont | Formation of ferromagnetic cro2 by decomposition of higher valent chromium oxides |
-
1972
- 1972-02-23 AU AU39268/72A patent/AU452489B2/en not_active Expired
- 1972-02-29 NL NL7202599A patent/NL7202599A/xx not_active Application Discontinuation
- 1972-02-29 DK DK91872AA patent/DK137446B/da unknown
- 1972-02-29 SE SE02488/72A patent/SE369185B/xx unknown
- 1972-02-29 NO NO00616/72A patent/NO128866B/no unknown
- 1972-02-29 FI FI544/72A patent/FI53203C/fi active
- 1972-03-01 ZA ZA721366A patent/ZA721366B/xx unknown
- 1972-03-01 GB GB962272A patent/GB1343623A/en not_active Expired
- 1972-03-01 US US231028A patent/US3929978A/en not_active Expired - Lifetime
- 1972-03-01 CS CS1357A patent/CS152410B2/cs unknown
- 1972-03-01 FR FR7206997A patent/FR2128448B1/fr not_active Expired
- 1972-03-01 CH CH297272A patent/CH573361A5/xx not_active IP Right Cessation
- 1972-03-02 DE DE19722210059 patent/DE2210059A1/de active Pending
- 1972-03-02 PL PL1972153827A patent/PL83251B1/pl unknown
- 1972-03-02 JP JP47021104A patent/JPS515999B1/ja active Pending
- 1972-03-02 AT AT175272A patent/AT311923B/de not_active IP Right Cessation
- 1972-03-03 CA CA136,259A patent/CA960434A/en not_active Expired
- 1972-03-03 BR BR1246/72*[A patent/BR7201246D0/pt unknown
- 1972-03-03 DD DD161349A patent/DD100925A5/xx unknown
- 1972-03-03 ES ES400413A patent/ES400413A1/es not_active Expired
- 1972-03-03 BE BE780219A patent/BE780219A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DK137446C (no) | 1978-08-14 |
| FR2128448A1 (no) | 1972-10-20 |
| CH573361A5 (no) | 1976-03-15 |
| GB1343623A (en) | 1974-01-16 |
| ES400413A1 (es) | 1975-01-01 |
| US3929978A (en) | 1975-12-30 |
| NO128866B (no) | 1974-01-21 |
| BE780219A (fr) | 1972-09-04 |
| JPS515999B1 (no) | 1976-02-24 |
| BR7201246D0 (pt) | 1973-06-07 |
| AT311923B (de) | 1973-12-10 |
| CS152410B2 (no) | 1973-12-19 |
| NL7202599A (no) | 1972-09-06 |
| FR2128448B1 (no) | 1977-04-01 |
| ZA721366B (en) | 1972-11-29 |
| DD100925A5 (no) | 1973-10-12 |
| FI53203B (no) | 1977-11-30 |
| AU3926872A (en) | 1973-08-30 |
| CA960434A (en) | 1975-01-07 |
| AU452489B2 (en) | 1974-08-16 |
| FI53203C (no) | 1978-03-10 |
| DE2210059A1 (de) | 1972-09-07 |
| PL83251B1 (no) | 1975-12-31 |
| SE369185B (no) | 1974-08-12 |
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