JPH02309608A - Manufacture of magnetic fluid - Google Patents
Manufacture of magnetic fluidInfo
- Publication number
- JPH02309608A JPH02309608A JP13112589A JP13112589A JPH02309608A JP H02309608 A JPH02309608 A JP H02309608A JP 13112589 A JP13112589 A JP 13112589A JP 13112589 A JP13112589 A JP 13112589A JP H02309608 A JPH02309608 A JP H02309608A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- carbonyl compound
- cobalt
- active agent
- cobalt carbonyl
- 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.)
- Pending
Links
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 24
- 239000010941 cobalt Substances 0.000 claims abstract description 24
- -1 cobalt carbonyl compound Chemical class 0.000 claims abstract description 16
- 239000004094 surface-active agent Substances 0.000 claims abstract description 16
- 239000003960 organic solvent Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 abstract description 19
- 238000006243 chemical reaction Methods 0.000 abstract description 16
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 7
- 239000010419 fine particle Substances 0.000 abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005054 agglomeration Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- 239000011261 inert gas Substances 0.000 abstract description 4
- 238000005979 thermal decomposition reaction Methods 0.000 abstract description 3
- 229910052786 argon Inorganic materials 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 2
- 239000012298 atmosphere Substances 0.000 abstract 1
- 230000005415 magnetization Effects 0.000 description 10
- 239000000696 magnetic material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000011362 coarse particle Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 229910002090 carbon oxide Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 2
- 150000002430 hydrocarbons Chemical group 0.000 description 2
- 239000002563 ionic surfactant Substances 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 150000001869 cobalt compounds Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 1
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
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
- H01F1/442—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids the magnetic component being a metal or alloy, e.g. Fe
Abstract
Description
【発明の詳細な説明】 〔発明の背景〕 （産業上の利用分野） 本発明は、改良された磁性流体の製造法に関する。[Detailed description of the invention] [Background of the invention] (Industrial application field) The present invention relates to an improved method of making magnetic fluids.
（従来の技術）
磁性流体は液体状の磁石であり、真空回転軸シール、イ
ンクジェットプリンター等の分野で利用されている。(Prior Art) A magnetic fluid is a liquid magnet and is used in fields such as vacuum rotary shaft seals and inkjet printers.
磁性流体としては、酸化物磁性材料の微粒子を表面活性
剤で処理して、有機溶剤の中にコロイド状に分散された
ものが既に実用化されている。しかし、酸化物磁性材料
は飽和磁化が小さい為、磁性流体としての飽和磁化が最
高でも６００Ｇ程度のものしか得られず、その応用範囲
が限定されている。As a magnetic fluid, one in which fine particles of oxide magnetic material are treated with a surfactant and dispersed in a colloidal state in an organic solvent has already been put into practical use. However, since the oxide magnetic material has a small saturation magnetization, the maximum saturation magnetization as a magnetic fluid is only about 600 G, which limits its range of applications.
そこで、飽和磁化の大きい金属コバルトを磁性材料とし
て磁性流体を製造する方法が提案されており、例えば米
国特許第３２２８８１号および同第３２２８８２号、特
開昭節６１−６９９０５号および同６１−６５４０６号
各明細書他において、コバルトカルボニル化合物を有機
溶剤中、界面活性剤の存在下に熱分解することによる、
金属コバルト微粒子が均一に分散した磁性流体の製造法
が提案されている。Therefore, methods for manufacturing magnetic fluids using metal cobalt, which has a large saturation magnetization, as a magnetic material have been proposed, such as U.S. Pat. No. 322,881 and U.S. Pat. In each specification and elsewhere, by thermally decomposing a cobalt carbonyl compound in an organic solvent in the presence of a surfactant,
A method for producing a magnetic fluid in which metallic cobalt fine particles are uniformly dispersed has been proposed.
しかしながら、この方法によって得られる磁性流体は、
飽和磁化が高くなるという長所をＨするものの、磁性体
微粒子が凝集し、粗大粒子が生成し易いため分布が広い
ものとなりがちであり、また、コバルトカルボニル化合
物として通常用いられるＣｏ （Ｃｏ） ８は、保存
時に空気中の水や酸素により変質し晶く、そのため得ら
れる磁性流体の再現性が悪い等の欠点があった。However, the magnetic fluid obtained by this method is
Although it has the advantage of high saturation magnetization, the magnetic fine particles tend to aggregate and coarse particles tend to be formed, so the distribution tends to be wide. However, during storage, it is altered and crystallized by water and oxygen in the air, which has the disadvantage that the reproducibility of the obtained magnetic fluid is poor.
従って、本発明の目的は、従来法の欠点を解消し、６０
０Ｇ以上の高飽和磁化をＨし、かつ凝集による粗大粒子
がなくシャープな粒子径分糸を白゛する金属コバルトの
磁性流体を提供することにある。Therefore, it is an object of the present invention to overcome the drawbacks of the conventional method and to
The object of the present invention is to provide a metallic cobalt magnetic fluid that has a high saturation magnetization of 0 G or more and has no coarse particles due to agglomeration and has a sharp particle diameter distribution.
本発明者等は、上記の欠点を解消すべく鋭意検討の結果
、コバルトカルボニル化合物を有機溶剤中、界面活性剤
の存在下に熱分解することにより磁性流体を製造する方
法において、コバルトカルボニル化合物として有機リン
付加コバルトカルボニル化合物を用いることにより、磁
性体の粒子径が制御し易く、凝集に対して安定で、しか
も粒子が細かくシャープな粒径分布のコバルト金属磁性
流体が得られることを見出し、本発明をなし得た。As a result of intensive studies to solve the above-mentioned drawbacks, the present inventors have developed a method for producing a magnetic fluid by thermally decomposing a cobalt carbonyl compound in an organic solvent in the presence of a surfactant. We discovered that by using an organic phosphorus-adducted cobalt carbonyl compound, it is possible to easily control the particle size of the magnetic material, to obtain a cobalt metal magnetic fluid that is stable against agglomeration and has fine particles and a sharp particle size distribution. I was able to invent something.
即ち、本発明による磁性流体の製造法は、有機溶剤中、
界面活性剤の存在下に有機リン付加コバルトカルボニル
化合物を熱分解することを特徴とするものである。That is, the method for producing a magnetic fluid according to the present invention comprises: in an organic solvent;
This method is characterized by thermally decomposing an organic phosphorus-added cobalt carbonyl compound in the presence of a surfactant.
有機リン付加コバルト化合物
本発明において使用される有機リン付加コバルトカルボ
ニル化合物とは、コバルトカルボニル化合物のカルボニ
ル基が有機リン化合物で置換したもので、例えば、
Ｃｏ２（ＣＯ）７ＰＲ３、Ｃｏ２（ＣＯ）６（ＰＨ１）
２、Ｃｏ４（ＣＯ）１ｏ（ＰＨ１）２、
ｃｏ （ＣＯ）８（ＰＨ１）４
（ここでＲは、炭素数１〜４０の炭化水素基）等の化合
物であり、中でも熱安定性の高いＣｏ２（ＣＯ）６（Ｐ
Ｈ１）２が好ましい。Organophosphorus-adducted cobalt compound The organophosphorus-adducted cobalt carbonyl compound used in the present invention is a cobalt carbonyl compound in which the carbonyl group is substituted with an organophosphorus compound, such as Co2(CO)7PR3, Co2(CO)6( PH1)
2, Co4(CO)1o(PH1)2, co(CO)8(PH1)4 (here, R is a hydrocarbon group having 1 to 40 carbon atoms), among others Co2 has high thermal stability. (CO)6(P
H1)2 is preferred.
有機溶媒
本発明に使用される有機溶媒としては、炭化水素油、シ
リコン油、フロロカーボン油等が用いられるが、中でも
炭素数７〜２２のパラフィン類、オレフィン類が好まし
く用いられる。Organic Solvent The organic solvent used in the present invention includes hydrocarbon oil, silicone oil, fluorocarbon oil, etc. Among them, paraffins and olefins having 7 to 22 carbon atoms are preferably used.
界面活性剤
本発明に使用される界面活性剤としては、非イオン性界
面活性剤、イオン性界面活性剤、両性界面活性剤、高級
脂肪酸及びその誘導体等が挙げられる。Surfactant Examples of the surfactant used in the present invention include nonionic surfactants, ionic surfactants, amphoteric surfactants, higher fatty acids and derivatives thereof.
イオン性界面活性剤としては、カルボン酸型、硫酸エス
テル型、スルホン酸型、アミン型の界面活性剤が使用で
きる。非イオン性界面活性剤としては、アクリル酸系、
尿素系、ポリビニルアルコール系の界面活性剤が使用で
きる。As the ionic surfactant, carboxylic acid type, sulfuric acid ester type, sulfonic acid type, and amine type surfactants can be used. Examples of nonionic surfactants include acrylic acid,
Urea-based and polyvinyl alcohol-based surfactants can be used.
磁性流体の製造
本発明の磁性流体の製造に於ける仕込組成は、前記有機
リン付加コバルトカルボニル化合物の金属コバルト換算
１重量部当たり、有機溶媒１０〜５０００重量部、好ま
しくは１００〜４０００！ｆｉ量部、界面活性剤０．０
１〜５０重量部、好ましくは０．１〜２０重量部である
。Production of magnetic fluid The charging composition for producing the magnetic fluid of the present invention is 10 to 5,000 parts by weight, preferably 100 to 4,000 parts by weight of organic solvent per 1 part by weight of the organophosphorus-adducted cobalt carbonyl compound in terms of metal cobalt. fi amount part, surfactant 0.0
The amount is 1 to 50 parts by weight, preferably 0.1 to 20 parts by weight.
本発明によれば、例えば、撹拌棒、コンデンサー、不活
性ガス導入口の付いた反応容器に所定量の前記コバルト
カルボニル化合物、界面活性剤及び有機溶剤を仕込んだ
後、アルゴン、窒素等の不活性ガスで反応容器内を置換
後昇温し、コバルトカルボニル化合物の熱分解反応を行
なうことにより、磁性流体を製造することができる。反
応温度は、一般に１１０〜２００℃が好ましい。１１０
℃より低いと反応が遅いため実際的でなく、２００℃超
過では反応速度が大き過ぎるため一定の粒径制御ができ
ない。反応は一酸化炭素の発生が認められなくなるまで
行えばよい。According to the present invention, for example, after charging a predetermined amount of the cobalt carbonyl compound, surfactant, and organic solvent into a reaction vessel equipped with a stirring bar, a condenser, and an inert gas inlet, an inert gas such as argon, nitrogen, etc. A magnetic fluid can be produced by replacing the inside of the reaction vessel with a gas, raising the temperature, and carrying out a thermal decomposition reaction of the cobalt carbonyl compound. The reaction temperature is generally preferably 110 to 200°C. 110
If the temperature is lower than 200°C, the reaction will be slow, which is impractical; if the temperature is higher than 200°C, the reaction rate will be too high, making it impossible to control the particle size to a certain degree. The reaction may be carried out until the generation of carbon monoxide is no longer observed.
上記反応で得られる金属コバルト微粒子は、５０〜５０
０人の範囲で平均粒子径を制御でき、しかもシャープな
粒径分布を有する。粒子表面は前記界面活性剤でコーテ
ィングされているため、粒子は凝集することなく、均一
に分散する。The metal cobalt fine particles obtained by the above reaction have a particle size of 50 to 50
The average particle size can be controlled within the range of 0, and has a sharp particle size distribution. Since the particle surfaces are coated with the surfactant, the particles do not aggregate and are uniformly dispersed.
上記反応において、有機リン付加コバルトカルボニル化
合物は、通常使用されるＣｏ２（ＣＯ）８に比較して、
高い溶解性と熱安定性を有するため、熱分解時の粒径制
御性が極めて良好であり、また、空気中の水や酸素に対
して化学的に安定であるので貯蔵時の変質も少ないため
、再現性も良好である。In the above reaction, the organic phosphorus-added cobalt carbonyl compound has a
Because it has high solubility and thermal stability, particle size control during thermal decomposition is extremely good, and because it is chemically stable against water and oxygen in the air, there is little deterioration during storage. , reproducibility is also good.
かくして得られる磁性流体は、飽和磁化６００〜１００
ＯＧを有し、酸化物磁性材料系の磁性流体に比較して高
い飽和磁化を何する。The magnetic fluid thus obtained has a saturation magnetization of 600 to 100
It has OG and has high saturation magnetization compared to magnetic fluids based on oxide magnetic materials.
実施例−１
撹拌棒、コンデンサー、ガス導入口の付いた内容積１０
０ｍ１反応容器に
Ｃｏ２（ＣＯ）６〔Ｐ（Ｃ６Ｈ５）３〕２２５ｇ１ヘキ
サデカン１５ｇ１界面活性剤としてセチルアルコールの
酸化エチレン２０モル付加物９ｇを仕込み、反応容器内
を窒素ガスで置換後昇温し、攪拌下１５０℃で反応を行
なった。−酸化炭素の発生が認められなくなった時点（
反応時間５時間）で反応を終了し、放冷した。Example-1 Internal volume 10 with stirring bar, condenser, and gas inlet
225 g of Co2(CO)6[P(C6H5)3] 1 15 g of hexadecane 1 9 g of a 20 mole adduct of cetyl alcohol with ethylene oxide as a surfactant was charged into a 0 ml reaction vessel, and after purging the inside of the reaction vessel with nitrogen gas, the temperature was raised and stirred. The reaction was carried out at 150°C. −When the generation of carbon oxide is no longer observed (
The reaction was completed after a reaction time of 5 hours, and the mixture was allowed to cool.
得られた磁性流体中の透過型電子顕微鏡で測定した超微
粒子金属コバルトの平均粒子径は１２ＯＡであり、５０
ＯＡ以上の粗大粒子は認められなかった。The average particle diameter of the ultrafine metal cobalt particles in the obtained magnetic fluid measured with a transmission electron microscope was 12OA, and 50
No coarse particles larger than OA were observed.
得られた磁性流体の比重は、１４３０、飽和磁化は６３
３Ｇであった。The specific gravity of the obtained magnetic fluid was 1430, and the saturation magnetization was 63.
It was 3G.
また、この磁性流体を６００ｒｐｍで１時間遠心分離を
行っても、分離沈降は認められなかった。Further, even when this magnetic fluid was centrifuged at 600 rpm for 1 hour, no separated sedimentation was observed.
比較例−１
実施例−１において、
Ｃｏ （Ｃｏ） ＣＰ （Ｃ６Ｈ５）３：＋ ２
の代わりにＣｏ （Ｃｏ） ８（米国、５ｐｒｃＩＩ
ＩＣｈｃｉ、Ｉｎｅ社製）１７ｇを反応容器に投入した
他は、実施例−１と全く同様にして磁性流体の製造反応
を行なった。−酸化炭素の発生が認められなくなった時
点（反応時間４５分）で反応を終了し、放冷した。Comparative Example-1 In Example-1, Co (Co) CP (C6H5)3:+2
Co (Co) 8 (USA, 5prcII) instead of
A magnetic fluid production reaction was carried out in exactly the same manner as in Example 1, except that 17 g of IChci (manufactured by Ine) was put into the reaction vessel. - The reaction was terminated when no carbon oxide generation was observed (reaction time: 45 minutes), and the mixture was allowed to cool.
得られた磁性流体の飽和磁化は６２０Ｇで実施例−１と
同様であったが、透過型電子顕微鏡で観察される金属コ
バルトの粒径分布は実施例−１に比べ非常にブロードで
、５００Å以上の粗大粒子が認められた。この磁性流体
を６００ｒｐｍで１時間遠心分離を行なったところ、分
離沈降が認められた。The saturation magnetization of the obtained magnetic fluid was 620G, which was the same as in Example-1, but the particle size distribution of metallic cobalt observed with a transmission electron microscope was much broader than in Example-1, and was 500 Å or more. Coarse particles were observed. When this magnetic fluid was centrifuged at 600 rpm for 1 hour, separated sedimentation was observed.
手続補正口
特許庁長官 吉 １）文 毅 殿
１ 事件の表示
平成 １年特許願第１３１１２５号
２ 発明の名称
磁性流体の製造法
３ 補正をする者
事件との関係 特許出願人
（６０５） 三菱油化株式会社
５ 補正により する請求項の数
６ 補正の対象
明細書の「発明の詳細な説明」の橢
７ 補正の内容
（１） 明細書第４頁第１１行のｒ ＣＯ４（ＣＯ）
（ＰＲ） Ｊの後に「、ＣＯ２（ＣＯ） 〔
Ｐ（ＯＲ）３〕２」を挿入する。Proceeding amendment Director General of the Japan Patent Office Yoshi 1) Takeshi Moon 1 Display of the case 1999 Patent Application No. 131125 2 Name of the invention Method for manufacturing magnetic fluid 3 Person making the amendment Relationship with the case Patent applicant (605) Mitsubishi Oil KA Co., Ltd. 5 Number of claims made by amendment 6 Definition of "Detailed Description of the Invention" of the specification to be amended 7 Contents of the amendment (1) r on page 4, line 11 of the specification CO4 (CO)
(PR) After J “, CO2 (CO) [
Insert "P(OR)3]2".
（２） 同頁第１４行の「が好ましい。」の前に「、
ｃｏ （ＣＯ） 〔Ｐ（ＯＲ）３〕２」を挿人する。(2) On the 14th line of the same page, before “is preferable.”
Insert "co (CO) [P(OR)3]2".
（３） 第７頁第２行のｒｌｏｏｏＧＪをｒ１５００
ＧＪと訂正する。(3) rloooGJ on page 7, line 2 to r1500
I corrected it with GJ.
（４） 同頁第７行のｒＣｏ （Ｃｏ） ６（Ｐ（
Ｃ６Ｈ５）３〕２」を「Ｃ０２（ＣＯ）６〔Ｐ（Ｃ６Ｈ
工、）３〕２」と訂正する。(4) rCo (Co) 6(P(
C6H5)3]2” to “C02(CO)6[P(C6H
Correct it as "Eng.,) 3] 2".
（５） 第８頁最下行の後に下記を挿入する。(5) Insert the following after the bottom line of page 8.
「実施例−２
実施例−１において、有機リン付加コバルトカルボニル
化合物としてＣｏ （ＣＯ） ｂ （Ｐ（ＯＣ２Ｈ５
）３〕２２３ｇを用いた他は、実施例−１と同様にして
磁性流体を製造した。“Example-2 In Example-1, Co (CO) b (P(OC2H5
)3] A magnetic fluid was produced in the same manner as in Example-1, except that 223 g was used.
得られた磁性流体の比重は１．４１０．飽和磁化は６２
０Ｇであった。」The specific gravity of the obtained magnetic fluid was 1.410. Saturation magnetization is 62
It was 0G. ”
Claims (1)
ルトカルボニル化合物を熱分解することを特徴とする磁
性流体の製造法。A method for producing a magnetic fluid, which comprises thermally decomposing an organophosphorus-added cobalt carbonyl compound in an organic solvent in the presence of a surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13112589A JPH02309608A (en) | 1989-05-24 | 1989-05-24 | Manufacture of magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13112589A JPH02309608A (en) | 1989-05-24 | 1989-05-24 | Manufacture of magnetic fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02309608A true JPH02309608A (en) | 1990-12-25 |
Family
ID=15050571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13112589A Pending JPH02309608A (en) | 1989-05-24 | 1989-05-24 | Manufacture of magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02309608A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG83738A1 (en) * | 1998-07-31 | 2001-10-16 | Ibm | Method for producing nanoparticles of transition metals |
-
1989
- 1989-05-24 JP JP13112589A patent/JPH02309608A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG83738A1 (en) * | 1998-07-31 | 2001-10-16 | Ibm | Method for producing nanoparticles of transition metals |
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