CS207373B2 - Method of making the modified ferromagnetic chromium dioxide - Google Patents
Method of making the modified ferromagnetic chromium dioxide Download PDFInfo
- Publication number
- CS207373B2 CS207373B2 CS766928A CS692876A CS207373B2 CS 207373 B2 CS207373 B2 CS 207373B2 CS 766928 A CS766928 A CS 766928A CS 692876 A CS692876 A CS 692876A CS 207373 B2 CS207373 B2 CS 207373B2
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- chromium
- tellurium
- compound
- mixture
- ruthenium
- 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
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/02—Oxides or hydrates thereof
- C01G37/027—Chromium dioxide
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Magnetic Record Carriers (AREA)
- Chemical Treatment Of Metals (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT28915/75A IT1045191B (it) | 1975-10-31 | 1975-10-31 | Procedimento per la produzione di biossido di cromo ferromagnetico |
Publications (1)
Publication Number | Publication Date |
---|---|
CS207373B2 true CS207373B2 (en) | 1981-07-31 |
Family
ID=11224583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CS766928A CS207373B2 (en) | 1975-10-31 | 1976-10-27 | Method of making the modified ferromagnetic chromium dioxide |
Country Status (17)
Country | Link |
---|---|
JP (1) | JPS5274597A (de) |
AT (1) | AT356062B (de) |
AU (1) | AU502999B2 (de) |
BE (1) | BE847812A (de) |
BR (1) | BR7607234A (de) |
CA (1) | CA1090555A (de) |
CH (1) | CH625193A5 (de) |
CS (1) | CS207373B2 (de) |
DD (1) | DD127640A5 (de) |
DE (1) | DE2648305C3 (de) |
DK (1) | DK481376A (de) |
ES (1) | ES452891A1 (de) |
FR (1) | FR2329594A1 (de) |
GB (1) | GB1524576A (de) |
IT (1) | IT1045191B (de) |
NL (1) | NL7611785A (de) |
SE (1) | SE7611815L (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4524008A (en) * | 1983-12-16 | 1985-06-18 | E. I. Du Pont De Nemours And Company | Controlled initiation chromium dioxide synthesis |
DE3728453A1 (de) * | 1987-08-26 | 1989-03-09 | Basf Ag | Verfahren zur herstellung von modifiziertem, 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 (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2885365A (en) * | 1956-10-22 | 1959-05-05 | Du Pont | Ruthenium-modified chromium oxide ferromagnetic compositions, their pre-aration and use |
DE1467328B2 (de) * | 1963-07-24 | 1971-06-16 | Farbenfabriken Bayer AG, 5090 Le verkusen | Ferromagnetisches modifiziertes chromdioxid |
US3278263A (en) * | 1964-11-27 | 1966-10-11 | Du Pont | Ferromagnetic chromium dioxide and preparation thereof |
CH468923A (de) * | 1967-07-21 | 1969-02-28 | Ferag Ag | Transporteinrichtung für in einer Schuppenformation anfallende flächenhafte Gebilde |
DE1802469A1 (de) * | 1968-10-11 | 1971-10-28 | Bayer Ag | Verfahren zur Herstellung von ferromagnetischem Chromdioxid |
DE1922409A1 (de) * | 1969-05-02 | 1970-11-12 | Bayer Ag | Verfahren zur Herstellung von ferromagnetischem Chromdioxid |
DE2022820C3 (de) * | 1970-05-11 | 1980-01-03 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von hochkoerzitivem Chromdioxid |
AU452489B2 (en) * | 1971-03-04 | 1974-08-16 | Montecatini Edisons. P. A | Process for preparing ferromagnetic chromium dioxide |
JPS497198A (de) * | 1972-05-12 | 1974-01-22 | ||
IT956230B (it) * | 1972-04-22 | 1973-10-10 | Montedison Spa | Composizione di biossido di cromo ferromagnetico modificato e p oces so di preparazione |
-
1975
- 1975-10-31 IT IT28915/75A patent/IT1045191B/it active
-
1976
- 1976-10-25 NL NL7611785A patent/NL7611785A/xx not_active Application Discontinuation
- 1976-10-25 SE SE7611815A patent/SE7611815L/xx unknown
- 1976-10-25 DK DK481376A patent/DK481376A/da not_active Application Discontinuation
- 1976-10-25 CH CH1351376A patent/CH625193A5/it not_active IP Right Cessation
- 1976-10-26 CA CA264,248A patent/CA1090555A/en not_active Expired
- 1976-10-26 DE DE2648305A patent/DE2648305C3/de not_active Expired
- 1976-10-27 CS CS766928A patent/CS207373B2/cs unknown
- 1976-10-27 BR BR7607234A patent/BR7607234A/pt unknown
- 1976-10-28 FR FR7632529A patent/FR2329594A1/fr active Granted
- 1976-10-28 DD DD195502A patent/DD127640A5/xx unknown
- 1976-10-28 AU AU19118/76A patent/AU502999B2/en not_active Expired
- 1976-10-28 AT AT800476A patent/AT356062B/de not_active IP Right Cessation
- 1976-10-29 BE BE171938A patent/BE847812A/xx not_active IP Right Cessation
- 1976-10-29 JP JP51130370A patent/JPS5274597A/ja active Granted
- 1976-10-29 GB GB45138/76A patent/GB1524576A/en not_active Expired
- 1976-10-30 ES ES452891A patent/ES452891A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH625193A5 (en) | 1981-09-15 |
BR7607234A (pt) | 1977-09-13 |
AU1911876A (en) | 1978-05-04 |
NL7611785A (nl) | 1977-05-03 |
AU502999B2 (en) | 1979-08-16 |
DE2648305A1 (de) | 1977-05-12 |
SE7611815L (sv) | 1977-05-01 |
CA1090555A (en) | 1980-12-02 |
IT1045191B (it) | 1980-05-10 |
AT356062B (de) | 1980-04-10 |
BE847812A (fr) | 1977-04-29 |
ES452891A1 (es) | 1977-10-16 |
DD127640A5 (de) | 1977-10-05 |
JPS5274597A (en) | 1977-06-22 |
JPS5722893B2 (de) | 1982-05-15 |
DE2648305C3 (de) | 1982-11-25 |
DK481376A (da) | 1977-05-01 |
FR2329594B1 (de) | 1981-07-31 |
DE2648305B2 (de) | 1980-07-03 |
FR2329594A1 (fr) | 1977-05-27 |
GB1524576A (en) | 1978-09-13 |
ATA800476A (de) | 1979-09-15 |
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