JPS58199725A - 強磁性酸化鉄の製造方法 - Google Patents
強磁性酸化鉄の製造方法Info
- Publication number
- JPS58199725A JPS58199725A JP8060282A JP8060282A JPS58199725A JP S58199725 A JPS58199725 A JP S58199725A JP 8060282 A JP8060282 A JP 8060282A JP 8060282 A JP8060282 A JP 8060282A JP S58199725 A JPS58199725 A JP S58199725A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- heat treatment
- fe2o3
- gamma
- critical
- 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.)
- Granted
Links
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 230000005294 ferromagnetic effect Effects 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 5
- 230000005415 magnetization Effects 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 238000012546 transfer Methods 0.000 abstract description 21
- 230000005291 magnetic effect Effects 0.000 abstract description 16
- 230000007704 transition Effects 0.000 abstract description 16
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 229910006297 γ-Fe2O3 Inorganic materials 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007796 conventional method Methods 0.000 abstract description 4
- 230000005389 magnetism Effects 0.000 abstract description 3
- 229910003145 α-Fe2O3 Inorganic materials 0.000 abstract 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 31
- 238000004455 differential thermal analysis Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 239000000696 magnetic material Substances 0.000 description 9
- 238000010304 firing Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000000113 differential scanning calorimetry Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000008347 soybean phospholipid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910006540 α-FeOOH Inorganic materials 0.000 description 1
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8060282A JPS58199725A (ja) | 1982-05-12 | 1982-05-12 | 強磁性酸化鉄の製造方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8060282A JPS58199725A (ja) | 1982-05-12 | 1982-05-12 | 強磁性酸化鉄の製造方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58199725A true JPS58199725A (ja) | 1983-11-21 |
| JPH0343216B2 JPH0343216B2 (enrdf_load_stackoverflow) | 1991-07-01 |
Family
ID=13722874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8060282A Granted JPS58199725A (ja) | 1982-05-12 | 1982-05-12 | 強磁性酸化鉄の製造方法 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58199725A (enrdf_load_stackoverflow) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62223023A (ja) * | 1986-03-20 | 1987-10-01 | Ngk Insulators Ltd | フエライト用酸化鉄およびその製造法 |
| US5512194A (en) * | 1990-09-26 | 1996-04-30 | Ishihara Sangyo Kaisha, Ltd. | Acicular ferromagnetic iron oxide particles and process for producing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428299A (en) * | 1977-08-05 | 1979-03-02 | Basf Ag | Method of making acicular ferric magnetic iron oxide |
-
1982
- 1982-05-12 JP JP8060282A patent/JPS58199725A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428299A (en) * | 1977-08-05 | 1979-03-02 | Basf Ag | Method of making acicular ferric magnetic iron oxide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62223023A (ja) * | 1986-03-20 | 1987-10-01 | Ngk Insulators Ltd | フエライト用酸化鉄およびその製造法 |
| US5512194A (en) * | 1990-09-26 | 1996-04-30 | Ishihara Sangyo Kaisha, Ltd. | Acicular ferromagnetic iron oxide particles and process for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0343216B2 (enrdf_load_stackoverflow) | 1991-07-01 |
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