DE2022820C3 - Verfahren zur Herstellung von hochkoerzitivem Chromdioxid - Google Patents
Verfahren zur Herstellung von hochkoerzitivem ChromdioxidInfo
- Publication number
- DE2022820C3 DE2022820C3 DE2022820A DE2022820A DE2022820C3 DE 2022820 C3 DE2022820 C3 DE 2022820C3 DE 2022820 A DE2022820 A DE 2022820A DE 2022820 A DE2022820 A DE 2022820A DE 2022820 C3 DE2022820 C3 DE 2022820C3
- Authority
- DE
- Germany
- Prior art keywords
- chromium
- iron
- dopant
- needle
- stage
- 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
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 title claims description 27
- 229940090961 chromium dioxide Drugs 0.000 title claims description 23
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 49
- 229910052742 iron Inorganic materials 0.000 claims description 20
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 16
- 229940117975 chromium trioxide Drugs 0.000 claims description 13
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 claims description 13
- 239000002019 doping agent Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229910002588 FeOOH Inorganic materials 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- 229910052787 antimony Inorganic materials 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052711 selenium Inorganic materials 0.000 claims description 3
- 239000011669 selenium Substances 0.000 claims description 3
- 229910052714 tellurium Inorganic materials 0.000 claims description 3
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 3
- 239000002245 particle Substances 0.000 claims 3
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000005291 magnetic effect Effects 0.000 description 7
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 239000000049 pigment Substances 0.000 description 6
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910000423 chromium oxide Inorganic materials 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 150000004677 hydrates Chemical class 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 150000001845 chromium compounds Chemical class 0.000 description 2
- UOUJSJZBMCDAEU-UHFFFAOYSA-N chromium(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Cr+3].[Cr+3] UOUJSJZBMCDAEU-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- JPJALAQPGMAKDF-UHFFFAOYSA-N selenium dioxide Chemical compound O=[Se]=O JPJALAQPGMAKDF-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- HEQBUZNAOJCRSL-UHFFFAOYSA-N iron(ii) chromite Chemical compound [O-2].[O-2].[O-2].[Cr+3].[Fe+3] HEQBUZNAOJCRSL-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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
- 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)
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2022820A DE2022820C3 (de) | 1970-05-11 | 1970-05-11 | Verfahren zur Herstellung von hochkoerzitivem Chromdioxid |
| US141003A US3687851A (en) | 1970-05-11 | 1971-05-06 | Manufacture of highly coercive chromium dioxide |
| GB1395971*[A GB1345039A (en) | 1970-05-11 | 1971-05-10 | Manufacture of highly coercive chromium dioxide |
| FR7116916A FR2088492B1 (enExample) | 1970-05-11 | 1971-05-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2022820A DE2022820C3 (de) | 1970-05-11 | 1970-05-11 | Verfahren zur Herstellung von hochkoerzitivem Chromdioxid |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2022820A1 DE2022820A1 (de) | 1972-01-13 |
| DE2022820B2 DE2022820B2 (de) | 1979-03-22 |
| DE2022820C3 true DE2022820C3 (de) | 1980-01-03 |
Family
ID=5770729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2022820A Expired DE2022820C3 (de) | 1970-05-11 | 1970-05-11 | Verfahren zur Herstellung von hochkoerzitivem Chromdioxid |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3687851A (enExample) |
| DE (1) | DE2022820C3 (enExample) |
| FR (1) | FR2088492B1 (enExample) |
| GB (1) | GB1345039A (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0027640A1 (de) * | 1979-10-22 | 1981-04-29 | BASF Aktiengesellschaft | Verfahren zur Herstellung von ferromagnetischem Chromdioxid sowie seine Verwendung zur Herstellung von magnetischen Aufzeichnungsträgern |
Families Citing this family (5)
| 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 |
| IT1045191B (it) * | 1975-10-31 | 1980-05-10 | Montedison Spa | Procedimento per la produzione di biossido di cromo ferromagnetico |
| DE2556188C3 (de) * | 1975-12-13 | 1979-07-05 | Basf Ag, 6700 Ludwigshafen | Flexible Mehrschichtmagnetogrammträger |
| DE3513723A1 (de) * | 1985-04-17 | 1986-10-23 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von ferromagnetischem chromdioxid |
| DE3941578A1 (de) * | 1989-12-16 | 1991-06-20 | Basf Ag | Verfahren zur herstellung von stabilisiertem chromdioxid und magnetischer aufzeichnungstraeger enthaltend dieses material |
Family Cites Families (2)
| 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 |
| DE1802469A1 (de) * | 1968-10-11 | 1971-10-28 | Bayer Ag | Verfahren zur Herstellung von ferromagnetischem Chromdioxid |
-
1970
- 1970-05-11 DE DE2022820A patent/DE2022820C3/de not_active Expired
-
1971
- 1971-05-06 US US141003A patent/US3687851A/en not_active Expired - Lifetime
- 1971-05-10 GB GB1395971*[A patent/GB1345039A/en not_active Expired
- 1971-05-11 FR FR7116916A patent/FR2088492B1/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0027640A1 (de) * | 1979-10-22 | 1981-04-29 | BASF Aktiengesellschaft | Verfahren zur Herstellung von ferromagnetischem Chromdioxid sowie seine Verwendung zur Herstellung von magnetischen Aufzeichnungsträgern |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2088492A1 (enExample) | 1972-01-07 |
| DE2022820B2 (de) | 1979-03-22 |
| GB1345039A (en) | 1974-01-30 |
| FR2088492B1 (enExample) | 1975-07-04 |
| DE2022820A1 (de) | 1972-01-13 |
| US3687851A (en) | 1972-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| 8330 | Complete disclaimer |