JPH075924B2 - Metal fine particle aggregate and manufacturing method thereof, magnetic recording medium using metal fine particle aggregate and manufacturing method thereof - Google Patents
Metal fine particle aggregate and manufacturing method thereof, magnetic recording medium using metal fine particle aggregate and manufacturing method thereofInfo
- Publication number
- JPH075924B2 JPH075924B2 JP63139978A JP13997888A JPH075924B2 JP H075924 B2 JPH075924 B2 JP H075924B2 JP 63139978 A JP63139978 A JP 63139978A JP 13997888 A JP13997888 A JP 13997888A JP H075924 B2 JPH075924 B2 JP H075924B2
- Authority
- JP
- Japan
- Prior art keywords
- metal fine
- fine particles
- chlorosilane
- particle aggregate
- magnetic
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Materials Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Composite Materials (AREA)
- Compounds Of Iron (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、金属微粒子を取り扱う分野、特に磁気記録分
野での金属微粒子集合体とその製造方法および磁気記録
媒体とその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field of handling fine metal particles, particularly to a fine metal particle aggregate and a method for producing the same, and a magnetic recording medium and a method for producing the same in the field of magnetic recording.
従来の技術 従来の磁気記録媒体の製造は、粒子状の磁性材料微粒子
をバインダーと呼ばれる合成樹脂の中によく分散させ
て、磁性ペイントをつくり、このペイントを基体上に薄
く均一に塗る方法が多く用いられている。また、保磁力
を大きくするために、磁性ペイントを基体上に塗って乾
く前に磁場をかけて磁性微粒子を揃える工程がある。2. Description of the Related Art Conventional magnetic recording media are manufactured by a method in which fine particles of a magnetic material are well dispersed in a synthetic resin called a binder to form a magnetic paint, and the paint is applied thinly and uniformly on a substrate. It is used. Further, in order to increase the coercive force, there is a step of applying a magnetic paint on a substrate and applying a magnetic field before drying to align the magnetic fine particles.
発明が解決しようとする課題 しかしながら、従来法では磁性のない合成樹脂からなる
バインダーが多く含まれており高密度化には好ましくな
かった。また、バインダーの粘性のため磁性金属微粒子
の配向を揃えてやることは容易ではなかった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, the conventional method contains a large amount of a binder made of a non-magnetic synthetic resin, which is not preferable for increasing the density. Moreover, it was not easy to align the orientation of the magnetic metal fine particles due to the viscosity of the binder.
課題を解決するための手段 本発明は、磁性金属微粒子の表面に化学吸着によってク
ロロシラン系界面活性剤の単分子吸着膜を設け、隣接す
る他の金属微粒子の表面に設けられた単分子吸着膜と化
学結合を施すことにより、金属微粒子集合体を得るもの
である。さらに、これを用いて磁気記録媒体を得るもの
である。Means for Solving the Problems The present invention provides a monomolecular adsorption film of a chlorosilane-based surfactant by chemisorption on the surface of magnetic metal fine particles, and a monomolecular adsorption film provided on the surface of another adjacent metal fine particle. A metal fine particle aggregate is obtained by chemical bonding. Further, a magnetic recording medium is obtained by using this.
作用 本発明により磁性金属微粒子の表面に単分子吸着膜を形
成させ、かつ、その磁性金属微粒子集合体を化学結合に
よって形成させることで、磁性金属微粒子の取扱が容易
で、効率のよく磁化を残留させることができる。Effect According to the present invention, a monomolecular adsorption film is formed on the surface of magnetic metal fine particles, and the magnetic metal fine particle aggregate is formed by a chemical bond, so that the magnetic metal fine particles can be easily handled and efficiently retain the magnetization. Can be made.
実施例 以下に、本発明の金属微粒子集合体の一実施例を第１図
および第２図を用いて説明する。Example An example of the metal fine particle aggregate of the present invention will be described below with reference to FIGS. 1 and 2.
ここで、第２図は第１図の円Ａで囲むところの詳細を表
した模式図である。Here, FIG. 2 is a schematic diagram showing the details of the area enclosed by the circle A in FIG.
金属微粒子１の表面にクロロシラン系界面活性剤が一様
に吸着反応され、単分子膜２が形成される。単分子膜２
を構成しているクロロシラン系界面活性剤３は、その先
端に官能基を有し、隣接する金属微粒子の表面に形成さ
れたクロロシラン系界面活性剤の先端の官能基と重合反
応を起こし、化学結合部４を形成され、金属微粒子集合
体が形成される。A chlorosilane-based surfactant is uniformly adsorbed and reacted on the surface of the metal fine particles 1 to form the monomolecular film 2. Monolayer 2
The chlorosilane-based surfactant 3 that constitutes the compound has a functional group at its tip and causes a polymerization reaction with the functional group at the tip of the chlorosilane-based surfactant formed on the surface of the adjacent metal fine particles to chemically bond. The part 4 is formed, and the metal fine particle aggregate is formed.
つぎに、本発明の金属微粒子集合体の製造方法の一実施
例を第３図、第４図、第５図および第６図を用いて順序
だって説明する。Next, one embodiment of the method for producing a metal fine particle aggregate of the present invention will be described in order with reference to FIG. 3, FIG. 4, FIG. 5 and FIG.
ここで、第６図は第５図の円Ｂで囲むところの詳細を表
した模式図である。Here, FIG. 6 is a schematic diagram showing the details of the area enclosed by the circle B in FIG.
クロロシラン系界面活性剤としてCH2＝CH−（CH2）ｎ−
SiCl3（ここでｎは正の整数）を適宜溶解させたｎ−ヘ
キサンを主成分とする溶液５を調製し、金属微粒子６と
してたとえば鉄ニッケル合金微粒子を浸漬する。通常、
金属微粒子表面には自然酸化膜の薄膜が形成されてお
り、水酸基が露出している。したがって、−SiCl3基と
水酸基とが脱塩酸反応を起こして が金属微粒子表面に一様に形成され、クロロシラン系界
面活性剤からなる単分子膜７が一層（厚みとして２〜3n
m）形成される。（第３図） つぎに、クロロシラン系界面活性剤の単分子膜７で一様
に覆われた鉄ニッケル合金微粒子を取り出し、所定の密
度に保ちながらエネルギービームとして電子線８を照射
する。（第４図） 電子線照射によりクロロシラン系界面活性剤からなる単
分子膜７の先端のビニル基９は隣接する同様の金属微粒
子６′である鉄ニッケル合金微粒子を覆う単分子膜７′
の先端のビニル基９′と重合反応を起こし、化学結合10
を生ずる。（第５図，第６図） つぎに、本発明の金属微粒子集合体を用いた磁気記録媒
体の一実施例を第７図を用いて説明する。CH 2 = CH- (CH 2 ) n -as a chlorosilane-based surfactant
A solution 5 containing n-hexane as a main component, in which SiCl 3 (where n is a positive integer) is appropriately dissolved, is prepared and, for example, iron-nickel alloy particles are immersed as the metal particles 6. Normal,
A thin film of a natural oxide film is formed on the surface of the metal fine particles, and the hydroxyl group is exposed. Therefore, the --SiCl 3 group and the hydroxyl group cause a dehydrochlorination reaction. Are uniformly formed on the surface of the metal fine particles, and the monomolecular film 7 made of a chlorosilane-based surfactant has a single layer (thickness of 2 to 3 n).
m) formed. (FIG. 3) Next, the iron-nickel alloy fine particles uniformly covered with the monomolecular film 7 of the chlorosilane-based surfactant are taken out, and the electron beam 8 is irradiated as an energy beam while maintaining a predetermined density. (FIG. 4) The monomolecular film 7'covering the iron-nickel alloy fine particles which are the similar metal fine particles 6'adjacent to the vinyl group 9 at the tip of the monomolecular film 7 made of a chlorosilane-based surfactant by electron beam irradiation.
Polymerization reaction with vinyl group 9'at the tip of
Cause (FIGS. 5 and 6) Next, an embodiment of a magnetic recording medium using the metal fine particle aggregate of the present invention will be described with reference to FIG. 7.
磁性金属微粒子11の表面にクロロシラン系界面活性剤を
一様に吸着反応させ、単分子膜12が形成される。前記磁
性金属微粒子を磁気記録媒体として配置する基体13上に
配置する。単分子膜を構成しているクロロシラン系界面
活性剤14は、その先端に官能基を有している。磁性金属
微粒子を一定方向に配向させたのち、隣接する磁性金属
微粒子の表面に形成されたクロロシラン系界面活性剤の
先端の官能基との間で重合反応を起こさせ、化学結合部
15を形成し、磁性金属微粒子集合体が形成される。以上
により、磁気記録媒体となる。A chlorosilane-based surfactant is uniformly adsorbed and reacted on the surface of the magnetic metal fine particles 11 to form a monomolecular film 12. The magnetic metal fine particles are arranged on a base 13 on which a magnetic recording medium is arranged. The chlorosilane-based surfactant 14 forming the monomolecular film has a functional group at its tip. After orienting the magnetic metal fine particles in a certain direction, a polymerization reaction occurs with the functional group at the tip of the chlorosilane-based surfactant formed on the surface of the adjacent magnetic metal fine particles to cause a chemical bond.
15 is formed, and a magnetic metal fine particle aggregate is formed. From the above, a magnetic recording medium is obtained.
つぎに、本発明の金属微粒子集合体を用いた磁気記録媒
体の製造方法の一実施例を第８図ならびに第９図を用い
て説明する。Next, one embodiment of a method of manufacturing a magnetic recording medium using the metal fine particle aggregate of the present invention will be described with reference to FIGS. 8 and 9.
金属微粒子集合体の製造方法の一実施例で示したと同様
にクロロシラン系界面活性剤としてCH2＝CH−（CH2）ｎ
−SiCl3（ここでｎは正の整数）を適宜溶解させたｎ−
ヘキサンを主成分とする溶液を調製し、磁性金属微粒子
としてたとえばマグネタイト微粒子を浸漬する。マグネ
タイトは酸化鉄系磁性体であり、マグネタイト微粒子の
表面には当然水酸基が露出している。また酸化物以外の
磁性金属微粒子の場合は磁性金属微粒子の表面には一般
に自然酸化膜の薄膜が形成されており、同じく水酸基が
露出している。したがって、クロロシラン系界面活性剤
の−SiCl3基と水酸基とが脱塩酸反応を起こして が磁性金属微粒子表面に一様に形成され、クロロシラン
系界面活性剤からなる単分子膜16が一層（厚みとして２
〜3nm）形成される。つぎに、クロロシラン系界面活性
剤の単分子膜16で一様に覆われた磁性金属微粒子17を取
り出し、磁性金属微粒子17を磁気記録媒体の基体18上に
配置する。通常の工程では塗布法が用いられる。つぎ
に、磁性金属微粒子を一定の配向性をもたせるため、基
体18に対し適宜な角度でもって磁場19をかける。本実施
例では基体に対し垂直に磁場をかける例を示す。（第８
図） 磁場19をかけることにより磁気金属微粒子17はその磁場
により一定の配向をしめす。この状態を所定の密度に保
ちながらエネルギービームとしてたとえば電子線20を照
射する。電子線照射によりクロロシラン系界面活性剤か
らなる単分子膜16の先端のビニル基は隣接する同様の磁
性金属微粒子を覆う単分子膜の先端のビニル基と重合反
応を起こし、化学結合部21を生じ，固定化される。（第
９図） 次に、本発明の金属微粒子集合体を用いた磁気録媒体の
製造方法の一実施例を同じく第８図ならびに第９図を用
いて説明する。As in the case of one example of the method for producing a metal fine particle aggregate, CH 2 ═CH— (CH 2 ) n was used as the chlorosilane-based surfactant.
-SiCl 3 (where n is a positive integer) is appropriately dissolved n-
A solution containing hexane as a main component is prepared, and magnetite particles, for example, are immersed as magnetic metal particles. Magnetite is an iron oxide-based magnetic material, and hydroxyl groups are naturally exposed on the surface of magnetite fine particles. Further, in the case of magnetic metal fine particles other than oxides, a thin film of natural oxide film is generally formed on the surface of the magnetic metal fine particles, and the hydroxyl groups are similarly exposed. Therefore, the -SiCl 3 group of the chlorosilane-based surfactant and the hydroxyl group undergo a dehydrochlorination reaction. Are uniformly formed on the surface of the magnetic metal fine particles, and the monomolecular film 16 made of a chlorosilane-based surfactant has one layer (thickness: 2).
~ 3 nm) formed. Next, the magnetic metal fine particles 17 uniformly covered with the monomolecular film 16 of the chlorosilane-based surfactant are taken out, and the magnetic metal fine particles 17 are placed on the substrate 18 of the magnetic recording medium. A coating method is used in a usual process. Next, in order to give the magnetic metal fine particles a certain orientation, a magnetic field 19 is applied to the substrate 18 at an appropriate angle. In this embodiment, an example in which a magnetic field is applied perpendicularly to the substrate is shown. (Eighth
(Fig.) By applying a magnetic field 19, the magnetic metal fine particles 17 are oriented in a certain direction by the magnetic field. While maintaining this state at a predetermined density, an electron beam 20, for example, is irradiated as an energy beam. Upon irradiation with an electron beam, the vinyl group at the tip of the monomolecular film 16 made of a chlorosilane-based surfactant causes a polymerization reaction with the vinyl group at the tip of the monomolecular film covering the adjacent similar magnetic metal fine particles to form a chemical bond portion 21. ， Be fixed. (FIG. 9) Next, an embodiment of a method of manufacturing a magnetic recording medium using the metal fine particle aggregate of the present invention will be described with reference to FIGS. 8 and 9.
前記の金属微粒子集合体を用いた磁気録媒体の製造方法
の一実施例で示したと同様にクロロシラン系界面活性剤
としてCH2＝CH−（CH2）ｎ−SiCl3（ここでｎは正の整
数）を適宜溶解させたｎ−ヘキサンを主成分とする溶液
を調製し、磁性金属微粒子としてたとえばマグネタイト
微粒子を浸漬する。マグネタイトは酸化鉄系磁性体であ
り、マグネタイト微粒子の表面には当然水酸基が露出し
ている。また酸化物以外の磁性金属微粒子の場合は磁性
金属微粒子の表面には一般に自然酸化膜の薄膜が形成さ
れており、同じく水酸基が露出している。したがって、
クロロシラン系界面活性剤の−SiCl3基と水酸基とが脱
塩酸反応を起こして が磁性金属微粒子表面に一様に形成され、クロロシラン
系界面活性剤からなる単分子膜16が一層（厚みとして２
〜3nm）形成される。つぎに、クロロシラン系界面活性
剤の単分子膜16で一様に覆われた磁性金属微粒子17を取
り出す。つぎに、あらかじめ磁性金属微粒子を磁化させ
るため、外部より磁場をかける。つぎに、磁化された磁
性金属微粒子17を磁気記録媒体の基体18上に配置する。
通常の工程では塗布法が用いられる。つぎに、磁化され
た磁性金属微粒子を一定の配向性をもたせるため、基体
18に対し適宜な角度でもって磁場19をかける。本実施例
では基体に対し垂直に磁場をかける例を示す。（第８
図） 磁場19をかけることにより磁化された磁気金属微粒子17
はその磁場により一定の配向をしめす。この状態を所定
の密度に保ちながらエネルギービームとしてたとば電線
20を照射する。電子線照射によりクロロシラン系界面活
性剤からなる単分子膜16の先端のビニル基は隣接する同
様の磁性金属微粒子を覆う単分子膜の先端のビニル基と
重合反応を起こし、化学結合部21を生じ，固定化され
る。（第９図） なお、本実施例は断面図を用いた説明であるが、立体的
に隣接する金属微粒子間で化学結合が行われていること
は言うまでもない。As described in one embodiment of the method for producing a magnetic recording medium using the above-mentioned metal fine particle aggregate, CH 2 ═CH— (CH 2 ) n —SiCl 3 (where n is a positive value) is used as the chlorosilane-based surfactant. A solution containing n-hexane as a main component in which (integer) is appropriately dissolved is prepared, and, for example, magnetite particles are immersed as magnetic metal particles. Magnetite is an iron oxide-based magnetic material, and hydroxyl groups are naturally exposed on the surface of magnetite fine particles. Further, in the case of magnetic metal fine particles other than oxides, a thin film of natural oxide film is generally formed on the surface of the magnetic metal fine particles, and the hydroxyl groups are similarly exposed. Therefore,
-SiCl 3 groups chlorosilane-based surface active agent and the hydroxyl group undergoes dehydrochlorination Are uniformly formed on the surface of the magnetic metal fine particles, and the monomolecular film 16 made of a chlorosilane-based surfactant has one layer (thickness: 2).
~ 3 nm) formed. Next, the magnetic metal fine particles 17 uniformly covered with the monomolecular film 16 of the chlorosilane-based surfactant are taken out. Next, in order to magnetize the magnetic metal particles in advance, a magnetic field is applied from the outside. Next, the magnetized magnetic metal fine particles 17 are arranged on the substrate 18 of the magnetic recording medium.
A coating method is used in a usual process. Next, in order to give the magnetized magnetic metal fine particles a certain orientation,
A magnetic field 19 is applied to 18 at an appropriate angle. In this embodiment, an example in which a magnetic field is applied perpendicularly to the substrate is shown. (Eighth
Figure) Magnetic metal particles 17 magnetized by applying a magnetic field 19
Shows a certain orientation due to its magnetic field. If this state is maintained as a predetermined density and an energy beam is used,
Irradiate 20. Upon irradiation with an electron beam, the vinyl group at the tip of the monomolecular film 16 made of a chlorosilane-based surfactant causes a polymerization reaction with the vinyl group at the tip of the monomolecular film covering the adjacent similar magnetic metal fine particles to form a chemical bond portion 21. ， Be fixed. (FIG. 9) Although the present embodiment has been described using a sectional view, it goes without saying that chemical bonding is performed between the three-dimensionally adjoining metal fine particles.
また、本実施例ではクロロシラン系界面活性剤を用いた
が、水酸基に対して結合性のある基であれば、クロロシ
ラン系界面活性剤に限らない。In addition, the chlorosilane-based surfactant was used in this example, but the group is not limited to the chlorosilane-based surfactant as long as it has a group capable of binding to a hydroxyl group.
さらになお、本実施例ではクロロシラン系界面活性剤の
先端の官能基としてビニル基を用いたが、他の官能基、
たとえばアセチレン基、ジアセチレン基、エポキシ基の
ような重合反応を起こすものであってもよい。Furthermore, although a vinyl group was used as the functional group at the tip of the chlorosilane-based surfactant in this example, other functional groups,
For example, it may be one that causes a polymerization reaction such as an acetylene group, a diacetylene group, or an epoxy group.
さらにまた、本実施例では磁性金属微粒子を基体上に配
置する方法として塗布法を用いたが、他の薄膜形成方
法、たとえば、キャスト法など磁性金属微粒子の表面に
形成された単分子膜に応じて適宜変えてもよい。Furthermore, although the coating method is used as the method for arranging the magnetic metal fine particles on the substrate in the present embodiment, other thin film forming methods such as a cast method can be used depending on the monomolecular film formed on the surface of the magnetic metal fine particles. It may be changed as appropriate.
さらにさらになお、本実施例ではエネルギービームとし
て電子線を用いたが紫外線、遠紫外線、Ｘ線、ガンマ線
などクロロシラン系界面活性剤の先端に設けられた官能
基の放射線重合反応に応じて適宜変えられることは言う
までもない。Furthermore, in the present embodiment, electron beam was used as the energy beam, but it can be appropriately changed depending on the radiation polymerization reaction of the functional group provided at the tip of the chlorosilane-based surfactant such as ultraviolet rays, far ultraviolet rays, X-rays and gamma rays. Needless to say.
発明の効果 本発明の金属微粒子集合体とその製造方法および金属微
粒子集合体を用いた磁気録媒体とその製造方法は金属微
粒子の新しい取扱方法を提供するものであり、さらに、
その応用としての金属微粒子からなる磁気録媒体とその
製造方法は従来の磁性ペイントのもつ問題点のバインダ
ーにあたるものがまったくなく高密度化が実現できる。
また、本発明ではバインダーがまったくないためバイン
ダーの粘性による配向障害がまったくなく、配向がきわ
めて容易である。さらにまた、本発明を垂直磁化磁気記
録媒体の製造に用いると、高性能の磁気記録媒体が非常
に容易に製造できる。さらにさらにまた、本発明の金属
微粒子集合体とその製造方法を用いて磁気記録媒体以外
の応用として配線材料、砥石等の加工材料、金属微粒子
の運搬等の取扱手段、コーティング材料、ペインティン
グ材料、感光性記録材料、印刷材料、触媒などの用途が
考えられる。EFFECTS OF THE INVENTION The metal fine particle aggregate of the present invention, the method for producing the same, and the magnetic recording medium using the metal fine particle aggregate and the method for producing the same provide a new method for handling metal fine particles.
As a magnetic recording medium composed of metal fine particles and its manufacturing method as its application, there is no binder which is a problem of the conventional magnetic paint, and high density can be realized.
Further, in the present invention, since there is no binder at all, there is no alignment trouble due to the viscosity of the binder, and alignment is extremely easy. Furthermore, when the present invention is used for manufacturing a perpendicular magnetization magnetic recording medium, a high performance magnetic recording medium can be manufactured very easily. Furthermore, as an application other than the magnetic recording medium using the metal fine particle aggregate and the manufacturing method thereof of the present invention, a wiring material, a processing material such as a grindstone, a handling means such as transportation of metal fine particles, a coating material, a painting material, Possible applications include photosensitive recording materials, printing materials and catalysts.
第１図は本発明の金属微粒子集合体を説明するための金
属微粒子の模式図、第２図は第１図の円内の拡大図、第
３図から第６図は本発明の金属微粒子集合体の製造方法
を説明するための工程を示す図、ここで第６図は第５図
の円内の拡大図、第７図は本発明の金属微粒子集合体を
用いた磁気記録媒体を説明するための磁気記録媒体の断
面を示す模式図、第８図および第９図は本発明の金属微
粒子集合体を用いた磁気記録媒体の製造方法を説明する
ための磁気記録媒体の断面を示す模式図である。 1,6,6′……金属微粒子、2,7,7′,12,16……単分子膜、
3,14……クロロシラン系界面活性剤、4,10,15,21……化
学結合部、8,20……電子線、9,9′,14……ビニル基、1
1,17……磁性金属微粒子、13,18……基体、19……磁
場。FIG. 1 is a schematic diagram of metal fine particles for explaining the metal fine particle aggregate of the present invention, FIG. 2 is an enlarged view of a circle in FIG. 1, and FIGS. 3 to 6 are metal fine particle aggregates of the present invention. FIG. 6 is a diagram showing steps for explaining a method for manufacturing a body, in which FIG. 6 is an enlarged view in a circle in FIG. 5, and FIG. 7 is a magnetic recording medium using the metal fine particle aggregate of the present invention. And FIG. 8 and FIG. 9 are schematic views showing a cross section of the magnetic recording medium for explaining the method for manufacturing the magnetic recording medium using the metal fine particle aggregate of the present invention. Is. 1,6,6 ′ …… Metal fine particles, 2,7,7 ′, 12,16 …… Monomolecular film,
3,14 …… Chlorosilane surfactant, 4,10,15,21 …… Chemical bond, 8,20 …… Electron beam, 9,9 ′, 14 …… Vinyl group, 1
1,17 …… Magnetic metal particles, 13,18 …… Substrate, 19 …… Magnetic field.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ１１Ｂ 5/845 Ａ 7303−5Ｄ Ｈ０１Ｆ 1/032 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location G11B 5/845 A 7303-5D H01F 1/032
Claims (13)
むクロロシラン系界面活性剤を非水系の有機溶剤中で金
属微粒子の表面に化学結合させることにより、前記金属
微粒子の表面を前記クロロシラン系界面活性剤よりなる
単分子吸着膜で覆い、 かつ、前記単分子吸着膜の少なくとも一部が隣接する金
属微粒子の周囲に形成された単分子吸着膜と化学結合し
ていることを特徴とする金属微粒子集合体。1. A surface of the metal fine particles is chemically bonded to a surface of the metal fine particles in a non-aqueous organic solvent with a chlorosilane-based surfactant containing a linear hydrocarbon chain having 10 or more carbon atoms. It is characterized in that it is covered with a monomolecular adsorption film made of a chlorosilane-based surfactant, and that at least a part of the monomolecular adsorption film is chemically bonded to the monomolecular adsorption film formed around the adjacent metal fine particles. Aggregate of fine metal particles.
ことを特徴とする請求項１に記載の金属微粒子集合体。2. The metal fine particle aggregate according to claim 1, wherein the chlorosilane-based surfactant contains a functional group.
状炭化水素鎖の先端にあることを特徴とする請求項２に
記載の金属微粒子集合体。3. The metal fine particle aggregate according to claim 2, wherein the functional group of the chlorosilane-based surfactant is at the tip of the linear hydrocarbon chain.
ラン系界面活性剤に含まれる直鎖状炭化水素鎖の先端の
官能基と、前記金属微粒子に隣接した少なくとも他の１
つの金属微粒子の表面に化学吸着したクロロシラン系界
面活性剤に含まれる直鎖状炭化水素鎖の先端に設けた官
能基とが反応して化学結合していることを特徴とする請
求項１〜３のいずれかに記載の金属微粒子集合体。4. A functional group at the tip of a linear hydrocarbon chain contained in a chlorosilane-based surfactant that is chemically adsorbed on the surface of metal fine particles, and at least another one adjacent to the metal fine particles.
4. The functional group provided at the tip of the linear hydrocarbon chain contained in the chlorosilane-based surfactant chemically adsorbed on the surface of one metal fine particle reacts with and chemically bonds. 7. The metal fine particle aggregate according to any one of 1.
特徴とする金属微粒子集合体の製造方法。 （Ａ） 非水系の有機溶剤中で金属微粒子の表面に直鎖
状炭化水素鎖を含むクロロシラン系界面活性剤を化学吸
着させ、金属微粒子の表面に単分子吸着膜を形成する工
程。 （Ｂ） 前記単分子吸着膜で覆われた金属微粒子を所定
の密度にし、エネルギービームを照射する工程。5. A method for producing an aggregate of fine metal particles, which comprises the following steps (A) and (B): (A) A step of chemically adsorbing a chlorosilane-based surfactant containing a linear hydrocarbon chain on the surface of the metal fine particles in a non-aqueous organic solvent to form a monomolecular adsorption film on the surface of the metal fine particles. (B) A step of irradiating an energy beam with the metal fine particles covered with the monomolecular adsorption film having a predetermined density.
素鎖を含むことを特徴とする請求項５に記載の金属微粒
子集合体の製造方法。6. The method for producing a metal fine particle aggregate according to claim 5, wherein the chlorosilane-based surfactant contains a linear hydrocarbon chain.
ことを特徴とする請求項５に記載の金属微粒子集合体の
製造方法。7. The method for producing a metal fine particle aggregate according to claim 5, wherein the chlorosilane-based surfactant contains a functional group.
−（CH2）ｎ−SiCl3（n:正の整数）で表される化学物質
を用いることを特徴とする請求項５〜７のいずれかに記
載の金属微粒子集合体の製造方法。8. CH2 = CH as a chlorosilane-based surfactant
The method for producing a metal fine particle aggregate according to any one of claims 5 to 7, wherein a chemical substance represented by-(CH2) n-SiCl3 (n: positive integer) is used.
面活性剤の単分子吸着膜で覆われた磁性金属微粒子集合
体を基体表面上に配置し、磁性金属微粒子集合体を形成
することを特徴とする金属微粒子集合体を用いた磁気記
録媒体。9. A magnetic metal fine particle aggregate is formed by disposing a magnetic metal fine particle aggregate covered with a monomolecular adsorption film of a chlorosilane-based surfactant containing a linear hydrocarbon chain on the surface of a substrate. A magnetic recording medium using the characteristic metal particle aggregate.
なることを特徴とする金属微粒子集合体を用いた磁気記
録媒体の製造方法。 （Ａ） 磁性金属微粒子の表面に直鎖状炭化水素鎖を含
むクロロシラン系界面活性剤の単分子吸着膜を形成する
工程。 （Ｂ） 磁気記録媒体の基体表面上に前記磁性金属微粒
子の膜を形成する工程。 （Ｃ） 前記基体表面上に形成された前記磁性金属微粒
子からなる膜にエネルギービームを照射する工程。10. A method of manufacturing a magnetic recording medium using a metal fine particle aggregate, which comprises the following steps (A), (B) and (C). (A) A step of forming a monomolecular adsorption film of a chlorosilane-based surfactant containing a linear hydrocarbon chain on the surface of the magnetic metal fine particles. (B) A step of forming a film of the magnetic metal fine particles on the surface of the base body of the magnetic recording medium. (C) A step of irradiating an energy beam on the film made of the magnetic metal fine particles formed on the surface of the substrate.
ト、γFe203系、二酸化クロム、コバルト系酸化鉄、Co
−Ni系等であることを特徴とする請求項10に記載の金属
微粒子集合体を用いた磁気記録媒体の製造方法。11. Magnetic fine metal particles are metallic iron, magnetite, γFe203 series, chromium dioxide, cobalt series iron oxide and Co.
11. The method for producing a magnetic recording medium using the metal fine particle aggregate according to claim 10, wherein the magnetic recording medium is a Ni-based material or the like.
たは電場を印加することを特徴とする請求項10に記載の
金属微粒子集合体を用いた磁気記録媒体の製造方法。12. The method for producing a magnetic recording medium using a metal fine particle aggregate according to claim 10, wherein a magnetic field or an electric field is applied when irradiating the energy beam.
工程からなることを特徴とする金属微粒子集合体を用い
た磁気記録媒体の製造方法。 （Ａ） 磁性金属微粒子の表面に直鎖状炭化水素鎖を含
むクロロシラン系界面活性剤の単分子吸着膜を形成する
工程。 （Ｂ） 前記磁性金属微粒子をあらかじめ磁化させる工
程。 （Ｃ） 磁気記録媒体の基体表面上に前記磁性金属微粒
子の膜を形成する工程。 （Ｄ） 前記基体表面上に形成された前記磁性金属微粒
子からなる膜にエネルギービームを照射する工程。13. A method of manufacturing a magnetic recording medium using a metal fine particle aggregate, which comprises the following steps (A), (B), (C) and (D). (A) A step of forming a monomolecular adsorption film of a chlorosilane-based surfactant containing a linear hydrocarbon chain on the surface of the magnetic metal fine particles. (B) A step of previously magnetizing the magnetic metal fine particles. (C) A step of forming a film of the magnetic metal fine particles on the surface of the base body of the magnetic recording medium. (D) A step of irradiating an energy beam on the film made of the magnetic metal fine particles formed on the surface of the substrate.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63139978A JPH075924B2 (en) | 1988-06-07 | 1988-06-07 | Metal fine particle aggregate and manufacturing method thereof, magnetic recording medium using metal fine particle aggregate and manufacturing method thereof |
| US07/361,261 US4985273A (en) | 1988-06-07 | 1989-06-05 | Method of producing fine inorganic particles |
| EP19890305701 EP0346074B1 (en) | 1988-06-07 | 1989-06-06 | Mass of fine particles of inorganic material and method of producing the same, ultrathin film of the inorganic fine particles and method of making the same, magnetic recording medium and method of providing the same method of manufacturing patterns of inorganic material, and method of manufacturing wirings of inorganic material |
| DE68924198T DE68924198T2 (en) | 1988-06-07 | 1989-06-06 | Mass of fine particles of an inorganic material and process for its production, ultra-thin film of fine inorganic particles and process for its production, magnetic recording medium and process for its production, process for the production of motifs of inorganic material and process for the production of wirings made of inorganic material . |
| US07/606,620 US5277980A (en) | 1988-06-07 | 1990-10-31 | Mass of fine particles of inorganic material and a film of the fine inorganic particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63139978A JPH075924B2 (en) | 1988-06-07 | 1988-06-07 | Metal fine particle aggregate and manufacturing method thereof, magnetic recording medium using metal fine particle aggregate and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01309902A JPH01309902A (en) | 1989-12-14 |
| JPH075924B2 true JPH075924B2 (en) | 1995-01-25 |
Family
ID=15258097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63139978A Expired - Lifetime JPH075924B2 (en) | 1988-06-07 | 1988-06-07 | Metal fine particle aggregate and manufacturing method thereof, magnetic recording medium using metal fine particle aggregate and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075924B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018135416A (en) * | 2017-02-20 | 2018-08-30 | 住友ベークライト株式会社 | Surface-treated metal powder and molding material |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6686071B2 (en) | 2000-06-06 | 2004-02-03 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording medium and magnetic recording apparatus using the same |
| TW569195B (en) | 2001-01-24 | 2004-01-01 | Matsushita Electric Ind Co Ltd | Micro-particle arranged body, its manufacturing method, and device using the same |
| JP4521569B2 (en) * | 2005-11-04 | 2010-08-11 | 国立大学法人 香川大学 | Magnetic recording medium, method of manufacturing the same, and magnetic recording reader using the same |
| WO2008136128A1 (en) * | 2007-04-23 | 2008-11-13 | Kazufumi Ogawa | Particulate film and manufacturing method thereof |
| WO2008139636A1 (en) * | 2007-05-14 | 2008-11-20 | Kazufumi Ogawa | Protective film and production method thereof |
| JP5846979B2 (en) * | 2012-03-16 | 2016-01-20 | 三井金属鉱業株式会社 | Coated magnetite particles and method for producing the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532206A (en) * | 1978-08-23 | 1980-03-06 | Tdk Corp | Memory unit |
| JPS60145301A (en) * | 1984-01-06 | 1985-07-31 | Mitsubishi Heavy Ind Ltd | Surface treatment of magnetic powder |
-
1988
- 1988-06-07 JP JP63139978A patent/JPH075924B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018135416A (en) * | 2017-02-20 | 2018-08-30 | 住友ベークライト株式会社 | Surface-treated metal powder and molding material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01309902A (en) | 1989-12-14 |
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