JPH026805B2 - - Google Patents
Info
- Publication number
- JPH026805B2 JPH026805B2 JP59018132A JP1813284A JPH026805B2 JP H026805 B2 JPH026805 B2 JP H026805B2 JP 59018132 A JP59018132 A JP 59018132A JP 1813284 A JP1813284 A JP 1813284A JP H026805 B2 JPH026805 B2 JP H026805B2
- Authority
- JP
- Japan
- Prior art keywords
- acicular
- particles
- compound
- feooh
- water
- 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 - Lifetime
Links
- 239000002245 particle Substances 0.000 claims description 352
- 150000001875 compounds Chemical class 0.000 claims description 218
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 194
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 171
- 239000011651 chromium Substances 0.000 claims description 158
- 229910052710 silicon Inorganic materials 0.000 claims description 151
- 229910052804 chromium Inorganic materials 0.000 claims description 140
- 229910052759 nickel Inorganic materials 0.000 claims description 131
- 239000011777 magnesium Substances 0.000 claims description 127
- 239000006249 magnetic particle Substances 0.000 claims description 127
- 229910006540 α-FeOOH Inorganic materials 0.000 claims description 121
- 229910052749 magnesium Inorganic materials 0.000 claims description 108
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 85
- 239000013078 crystal Substances 0.000 claims description 74
- 239000000725 suspension Substances 0.000 claims description 63
- 239000007789 gas Substances 0.000 claims description 57
- 239000007864 aqueous solution Substances 0.000 claims description 49
- 238000007254 oxidation reaction Methods 0.000 claims description 45
- 239000000843 powder Substances 0.000 claims description 45
- 230000005291 magnetic effect Effects 0.000 claims description 44
- 229910002588 FeOOH Inorganic materials 0.000 claims description 39
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 36
- 239000001301 oxygen Substances 0.000 claims description 36
- 229910052760 oxygen Inorganic materials 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 238000004519 manufacturing process Methods 0.000 claims description 26
- 229910000859 α-Fe Inorganic materials 0.000 claims description 25
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 22
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 19
- 159000000003 magnesium salts Chemical class 0.000 claims description 15
- 150000002815 nickel Chemical class 0.000 claims description 15
- 150000001844 chromium Chemical class 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 150000004760 silicates Chemical class 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 230000005415 magnetization Effects 0.000 description 31
- 238000000034 method Methods 0.000 description 27
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 24
- 229910052742 iron Inorganic materials 0.000 description 24
- 229910052698 phosphorus Inorganic materials 0.000 description 22
- 230000003647 oxidation Effects 0.000 description 20
- 230000000694 effects Effects 0.000 description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 15
- 229910019142 PO4 Inorganic materials 0.000 description 15
- 239000010408 film Substances 0.000 description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 15
- 239000010452 phosphate Substances 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- 230000007423 decrease Effects 0.000 description 14
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 11
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 11
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 11
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 238000011049 filling Methods 0.000 description 10
- 238000005755 formation reaction Methods 0.000 description 10
- 239000000696 magnetic material Substances 0.000 description 10
- 238000005245 sintering Methods 0.000 description 10
- 239000004115 Sodium Silicate Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 238000001914 filtration Methods 0.000 description 9
- 229910052911 sodium silicate Inorganic materials 0.000 description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 description 8
- 230000005294 ferromagnetic effect Effects 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 230000004907 flux Effects 0.000 description 7
- 239000012452 mother liquor Substances 0.000 description 7
- 239000007858 starting material Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 6
- 235000019341 magnesium sulphate Nutrition 0.000 description 6
- 239000006247 magnetic powder Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 238000005273 aeration Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 239000002923 metal particle Substances 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 235000019353 potassium silicate Nutrition 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 239000007771 core particle Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 239000011790 ferrous sulphate Substances 0.000 description 4
- 235000003891 ferrous sulphate Nutrition 0.000 description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 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
- 239000002244 precipitate Substances 0.000 description 3
- 238000011946 reduction process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N Methyl ethyl ketone Natural products CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 2
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000010979 pH adjustment Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 description 2
- MOMKYJPSVWEWPM-UHFFFAOYSA-N 4-(chloromethyl)-2-(4-methylphenyl)-1,3-thiazole Chemical compound C1=CC(C)=CC=C1C1=NC(CCl)=CS1 MOMKYJPSVWEWPM-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- 229910021555 Chromium Chloride Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- -1 aluminum compound Chemical class 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229940090961 chromium dioxide Drugs 0.000 description 1
- QSWDMMVNRMROPK-UHFFFAOYSA-K chromium(3+) trichloride Chemical compound [Cl-].[Cl-].[Cl-].[Cr+3] QSWDMMVNRMROPK-UHFFFAOYSA-K 0.000 description 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 description 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002816 nickel compounds Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 235000019983 sodium metaphosphate Nutrition 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 235000019351 sodium silicates Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59018132A JPS60162708A (ja) | 1984-01-31 | 1984-01-31 | 磁気記録用針状晶鉄合金磁性粒子粉末の製造法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59018132A JPS60162708A (ja) | 1984-01-31 | 1984-01-31 | 磁気記録用針状晶鉄合金磁性粒子粉末の製造法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60162708A JPS60162708A (ja) | 1985-08-24 |
| JPH026805B2 true JPH026805B2 (de) | 1990-02-14 |
Family
ID=11963076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59018132A Granted JPS60162708A (ja) | 1984-01-31 | 1984-01-31 | 磁気記録用針状晶鉄合金磁性粒子粉末の製造法 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60162708A (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01219103A (ja) * | 1988-02-26 | 1989-09-01 | Titan Kogyo Kk | 磁気記録用金属磁性粉末 |
| JPH01239817A (ja) * | 1988-03-19 | 1989-09-25 | Hitachi Maxell Ltd | 強磁性金属粉末およびその製造方法ならびにこの強磁性金属粉末を用いた磁気記録媒体 |
| DE4243760A1 (de) * | 1992-12-23 | 1994-06-30 | Bayer Ag | Verfahren zur Herstellung von Goethit |
-
1984
- 1984-01-31 JP JP59018132A patent/JPS60162708A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60162708A (ja) | 1985-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5853688B2 (ja) | Ｆｅ−Ｍｇを主成分とする針状晶合金磁性粒子粉末の製造法 | |
| JP3087825B2 (ja) | 紡錘状ゲータイト粒子粉末及びその製造法並びに該ゲータイト粒子粉末を出発原料として得られる鉄を主成分とする紡錘状金属磁性粒子粉末及びその製造法 | |
| US4514216A (en) | Acicular ferromagnetic alloy particles for magnetic recording and process for producing the same | |
| JPH026805B2 (de) | ||
| JP3427871B2 (ja) | コバルト被着型針状磁性酸化鉄粒子粉末 | |
| JPS6239203B2 (de) | ||
| US4495164A (en) | Process for producing acicular magnetite or acicular maghemite | |
| JPS62158801A (ja) | 紡錘形状を呈した鉄を主成分とする金属磁性粒子粉末及びその製造法 | |
| JPS6314484B2 (de) | ||
| JPH0120201B2 (de) | ||
| JPS6239202B2 (de) | ||
| JP3166809B2 (ja) | 針状磁性酸化鉄粒子粉末の製造法 | |
| JPH0261124B2 (de) | ||
| JPH0130884B2 (de) | ||
| JP3092649B2 (ja) | 鉄を主成分とする紡錘状金属磁性粒子粉末の製造法 | |
| JP3171223B2 (ja) | 針状磁性粒子粉末の製造法 | |
| JPS649372B2 (de) | ||
| JPH026801B2 (de) | ||
| JPS5921364B2 (ja) | 針状晶Ｆｅ−Ｚｎ合金磁性粒子粉末の製造法 | |
| JPS5853686B2 (ja) | 針状晶金属鉄磁性粒子粉末の製造法 | |
| JPS6149252B2 (de) | ||
| JP2883962B2 (ja) | 針状ゲータイト粒子粉末の製造法 | |
| JP2970699B2 (ja) | 針状磁性酸化鉄粒子粉末の製造法 | |
| JP3055308B2 (ja) | 針状磁性酸化鉄粒子粉末の製造法 | |
| JPH07126704A (ja) | 紡錘状を呈した鉄を主成分とする金属磁性粒子粉末及びその製造法 |