JPH07242902A - Composite powder and manufacturing method thereof - Google Patents
Composite powder and manufacturing method thereofInfo
- Publication number
- JPH07242902A JPH07242902A JP6034633A JP3463394A JPH07242902A JP H07242902 A JPH07242902 A JP H07242902A JP 6034633 A JP6034633 A JP 6034633A JP 3463394 A JP3463394 A JP 3463394A JP H07242902 A JPH07242902 A JP H07242902A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- mother
- child
- powder
- composite powder
- 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.)
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- Powder Metallurgy (AREA)
Abstract
(57)【要約】
【目的】 母粒子の表面にこの母粒子と異なる材料の子
粒子が付着した複合粉体及びその製造方法において、母
粒子に付着する子粒子の量を増大でき、母粒子材料と子
粒子材料との割合を所望の割合とすることができる複合
粉体及びその製造方法を提供する。
【構成】 母粒子１は例えば直径が２〜５０μｍのニッ
ケル粉であり、その表面には多数の凹凸が設けられてい
る。この母粒子１の表面には、大きさが母粒子１の約１
／１０のジルコニア粉からなる子粒子２が付着してい
る。
(57) [Summary] [Objective] In a composite powder in which child particles of a material different from the mother particles are attached to the surface of the mother particles and a method for producing the same, the amount of the child particles attached to the mother particles can be increased. Provided is a composite powder capable of adjusting a ratio of a material to a child particle material to a desired ratio, and a manufacturing method thereof. [Constitution] The mother particle 1 is, for example, nickel powder having a diameter of 2 to 50 μm, and a large number of irregularities are provided on the surface thereof. The size of the mother particle 1 is about 1
Child particles 2 made of / 10 zirconia powder are attached.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、有機又は無機の母粒子
の表面にこの母粒子と異なる材料からなる子粒子が付着
した複合粉体及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite powder in which organic or inorganic mother particles are attached with child particles made of a material different from the mother particles, and a method for producing the same.
【０００２】[0002]
【従来の技術】複合粉体は、母粒子の表面に母粒子と異
なる材料の子粒子をコート（被覆）又は固定化すること
により形成されたものであり、母粒子の性質（物理的性
質又は化学的性質）と異なる性質の表面層を有してい
る。このような複合粉体は、種々の分野において使用さ
れている。2. Description of the Related Art A composite powder is formed by coating (immobilizing) or immobilizing child particles of a material different from that of the mother particles on the surface of the mother particles. It has a surface layer with different properties from the chemical properties). Such composite powders are used in various fields.
【０００３】例えば、燃料電池の電極には、ニッケル粉
を母粒子とし安定化ジルコニア粉を子粒子とする複合粉
体を原料とし、溶射法又はスラリー法等により形成され
た高導電性の複合膜が設けられている。前記複合粉体
は、略球形のニッケル粉（母粒子）の表面にこのニッケ
ル粉の約１／１０の大きさの安定化ジルコニア粉（子粒
子）を付着させた後、酸化処理を施すことにより形成さ
れている。この場合に、母粒子の表面に子粒子を強固に
付着させる方法としては、静電気により母粒子の表面に
子粒子を付着させた後、高速気流中において粉体に衝撃
力を加えて母粒子と子粒子との付着強度を向上させる高
速気流中混合法と、粉体同士を相互に摩擦して、摩擦力
により母粒子の表面に子粒子を強固に付着させる粉体系
混合法とがある。For example, for a fuel cell electrode, a highly conductive composite film formed by a thermal spraying method or a slurry method using a composite powder of nickel powder as a mother particle and stabilized zirconia powder as a child particle as a raw material. Is provided. The composite powder is obtained by applying a stabilized zirconia powder (child particles) having a size of about 1/10 of the nickel powder on the surface of the substantially spherical nickel powder (mother particles) and then subjecting it to an oxidation treatment. Has been formed. In this case, as a method of firmly attaching the child particles to the surface of the mother particles, after attaching the child particles to the surface of the mother particles by static electricity, the mother particles by applying an impact force to the powder in a high-speed air stream. There are a high-speed air flow mixing method for improving the adhesion strength with the child particles, and a powder-based mixing method for rubbing the powder particles with each other to firmly attach the child particles to the surface of the mother particles by a frictional force.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
複合粉体においては、母粒子が略球形であるため、母粒
子に付着する子粒子の量の上限は、（母粒子の表面積）
と（子粒子の断面積×個数）との割合により決定され
る。例えば、直径が１０μｍのニッケル粉（母粒子）の
周面に直径が１μｍのジルコニア粉（子粒子）を密に付
着させた場合に、ニッケルとジルコニアとの重量割合
（ニッケル：ジルコニア）は８：２となり、これ以上ジ
ルコニアの重量割合を増大させることはできない。この
ため、従来は、例えばニッケルとジルコニアとの重量割
合が６：４の複合粉体を得ることはできない。However, in the conventional composite powder, since the mother particles are substantially spherical, the upper limit of the amount of child particles attached to the mother particles is (surface area of the mother particles).
And ((cross-sectional area of child particles x number)). For example, when zirconia powder (child particles) having a diameter of 1 μm is closely adhered to the peripheral surface of nickel powder (mother particles) having a diameter of 10 μm, the weight ratio of nickel and zirconia (nickel: zirconia) is 8: 2, and the weight ratio of zirconia cannot be increased any more. Therefore, conventionally, for example, a composite powder having a weight ratio of nickel and zirconia of 6: 4 cannot be obtained.
【０００５】本発明はかかる問題点に鑑みてなされたも
のであって、母粒子に付着する子粒子の量を増大でき、
母粒子材料と子粒子材料との割合を所望の割合とするこ
とができる複合粉体及びその製造方法を提供することを
目的とする。The present invention has been made in view of the above problems, and it is possible to increase the amount of child particles adhering to mother particles,
It is an object of the present invention to provide a composite powder capable of adjusting a ratio of a mother particle material and a child particle material to a desired ratio and a manufacturing method thereof.
【０００６】[0006]
【課題を解決するための手段】本発明に係る複合粉体
は、第１の材料により形成されその表面に凹凸が設けら
れた母粒子と、第２の材料により形成され前記母粒子に
付着された子粒子とを有することを特徴とする。A composite powder according to the present invention comprises a mother particle formed of a first material and having irregularities on its surface, and a mother particle formed of a second material and attached to the mother particle. It is characterized by having a child particle.
【０００７】また、本発明に係る複合粉体の製造方法
は、第１の材料により形成されその表面に凹凸が設けら
れた母粒子に、第２の材料により形成された子粒子を付
着させる工程を有することを特徴とする。In the method for producing a composite powder according to the present invention, the step of adhering the child particles formed of the second material to the mother particles formed of the first material and having irregularities on the surface thereof It is characterized by having.
【０００８】[0008]
【作用】本発明においては、母粒子の表面に凹凸が設け
られているため、母粒子の表面積が大きく、母粒子の表
面に付着する子粒子の付着量を増大することができる。
これにより、従来、不可能とされていた割合で子粒子材
料（第２の材料）を含有する複合粉体を得ることができ
る。In the present invention, since the surface of the mother particle is provided with irregularities, the surface area of the mother particle is large, and the amount of child particles attached to the surface of the mother particle can be increased.
As a result, it is possible to obtain a composite powder containing a child particle material (second material) in a ratio that has hitherto been impossible.
【０００９】なお、母粒子がニッケル粉の場合は、カル
ボニル法によりニッケル粉を製造する際に、その製造条
件を適正に制御することにより、表面に凹凸を有するニ
ッケル粉を得ることができる。When the mother particles are nickel powder, the nickel powder having unevenness on the surface can be obtained by appropriately controlling the manufacturing conditions when the nickel powder is manufactured by the carbonyl method.
【００１０】[0010]
【実施例】次に、本発明の実施例について、添付の図面
を参照して説明する。図１は本発明の実施例に係る複合
粉体を示す模式図である。母粒子１は平均粒径が２乃至
５０μｍのニッケル粉であり、その表面には多数の凹凸
が設けられている。この母粒子１の表面には、大きさが
母粒子１の約１／１０のジルコニア粉からなる子粒子２
が付着している。Embodiments of the present invention will now be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a composite powder according to an example of the present invention. The mother particles 1 are nickel powders having an average particle size of 2 to 50 μm, and many irregularities are provided on the surface thereof. On the surface of the mother particle 1, child particles 2 made of zirconia powder having a size about 1/10 of the mother particle 1 are formed.
Is attached.
【００１１】本実施例においては、母粒子１の表面に凹
凸が設けられているため、母粒子１の表面積が大きく、
子粒子２の付着量を従来に比して増大することができ
る。従って、従来不可能であるとされていた割合で子粒
子材料を含有する複合粉体を得ることができる。例え
ば、本実施例によれば、ニッケルとジルコニアと重量割
合（ニッケル：ジルコニア）が、６：４の複合粉体を得
ることも可能である。また、本実施例においては、母粒
子１の表面に設けられた凹凸により母粒子１と各子粒子
２との接触面積が増大するため、子粒子２の母粒子１に
対する付着強度が向上するという効果もある。In this embodiment, since the surface of the mother particle 1 is provided with irregularities, the surface area of the mother particle 1 is large,
The attachment amount of the child particles 2 can be increased as compared with the conventional one. Therefore, it is possible to obtain a composite powder containing a child particle material in a ratio that has been considered impossible in the past. For example, according to this example, it is possible to obtain a composite powder in which the weight ratio of nickel to zirconia is 6: 4 (nickel: zirconia). Further, in this example, since the contact area between the mother particle 1 and each child particle 2 is increased due to the unevenness provided on the surface of the mother particle 1, the adhesion strength of the child particle 2 to the mother particle 1 is improved. There is also an effect.
【００１２】次に、本実施例に係る複合粉体の製造方法
について説明する。先ず、図２（ａ）に示すように、母
粒子１として、直径が２乃至５０μｍであり、表面に凹
凸が設けられたニッケル粉を用意する。このニッケル粉
は、例えばカルボニル法により製造する。カルボニル法
においては、ニッケルカルボニルを反応塔内に噴射し、
このニッケルカルボニルを霧化させた状態で熱分解さ
せ、コンデンサの表面にニッケル粉を析出させる。この
ときに、製造条件を適切に制御することにより、表面に
凹凸を有するニッケル粉を得ることができる。Next, a method of manufacturing the composite powder according to this embodiment will be described. First, as shown in FIG. 2A, as the mother particles 1, nickel powder having a diameter of 2 to 50 μm and having irregularities on the surface is prepared. This nickel powder is produced, for example, by the carbonyl method. In the carbonyl method, nickel carbonyl is injected into the reaction tower,
The nickel carbonyl is thermally decomposed in the atomized state to deposit nickel powder on the surface of the capacitor. At this time, by appropriately controlling the manufacturing conditions, it is possible to obtain nickel powder having irregularities on the surface.
【００１３】また、図２（ｂ）に示すように、子粒子２
として、大きさが母粒子１の約１／１０のジルコニア粉
を用意する。Further, as shown in FIG. 2 (b), the child particles 2
As a material, zirconia powder having a size of about 1/10 that of the mother particle 1 is prepared.
【００１４】次いで、例えば高速気流中混合法又は粉体
系混合法等のように物理的な方法による表面改質装置を
使用し、母粒子１の表面に子粒子２を強固に付着させ
る。これにより、図１に示すように、母粒子１の表面の
凹凸に子粒子２が入り込んで複合化した複合粉体を得る
ことができる。Next, the child particles 2 are firmly adhered to the surface of the mother particles 1 by using a surface reforming device by a physical method such as a mixing method in a high-speed air stream or a powder-based mixing method. As a result, as shown in FIG. 1, it is possible to obtain a composite powder in which the child particles 2 enter the irregularities on the surface of the mother particle 1 to form a composite.
【００１５】なお、上述の実施例においては、母粒子が
ニッケル粉であり、子粒子がジルコニア粉である場合に
ついて説明したが、これにより本発明がニッケル粉の表
面にジルコニア粉が付着した複合粉体に限定されるもの
ではないことは勿論であり、母粒子は無機物及び有機物
のいずれであってもよく、また、子粒子も無機物及び有
機物のいずれであってもよい。更に、上述の実施例にお
いては、ニッケルとジルコニアとの２種類の材料が複合
化した複合粉体について説明したが、例えば子粒子とし
て２種類以上の材料を使用し、これらの複数種類の子粒
子を母粒子に付着させて複合化してもよい。In the above embodiments, the case where the mother particles are nickel powders and the child particles are zirconia powders has been described, but according to the present invention, the composite powder in which the zirconia powders are attached to the surface of the nickel powders is described. It is needless to say that the mother particles are not limited to the body, and the mother particles may be either an inorganic substance or an organic substance, and the child particles may be an inorganic substance or an organic substance. Furthermore, in the above-mentioned examples, the composite powder in which two kinds of materials, nickel and zirconia, are composited has been described, but, for example, two or more kinds of materials are used as the child particles, and plural kinds of these child particles are used. May be attached to the mother particles to form a composite.
【００１６】[0016]
【発明の効果】以上説明したように本発明に係る複合粉
体は、母粒子の表面に凹凸が設けられているから、母粒
子の表面積が大きく、母粒子の表面に多量の子粒子を付
着させることができると共に、母粒子に対する子粒子の
付着強度が向上するという効果を奏する。As described above, in the composite powder according to the present invention, since the surface of the mother particle is provided with irregularities, the surface area of the mother particle is large and a large amount of child particles adhere to the surface of the mother particle. In addition to the effect, it is possible to improve the adhesion strength of the child particles to the mother particles.
【００１７】また、本発明方法によれば、母粒子材料と
子粒子材料との割合が所望の割合の複合粉体を製造する
ことができる。例えば、本発明方法によれば、従来不可
能であるとされていたニッケルとジルコニアとの重量割
合が６：４の複合粉体を製造することも可能である。Further, according to the method of the present invention, it is possible to produce a composite powder having a desired ratio of the mother particle material and the child particle material. For example, according to the method of the present invention, it is possible to produce a composite powder having a weight ratio of nickel and zirconia of 6: 4, which has been considered impossible in the past.
【図１】本発明の実施例に係る複合粉体を示す模式図で
ある。FIG. 1 is a schematic view showing a composite powder according to an example of the present invention.
【図２】本発明の実施例に係る複合粉体の製造方法を示
す図であり、（ａ）は母粒子を示す模式図、（ｂ）は子
粒子を示す模式図である。FIG. 2 is a diagram showing a method for producing a composite powder according to an example of the present invention, (a) is a schematic diagram showing mother particles, and (b) is a schematic diagram showing child particles.
１；母粒子 ２；子粒子 1; Mother particle 2; Child particle
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中島 武憲 東京都江東区木場１丁目５番１号 株式会 社フジクラ内 (72)発明者 山岡 悟 東京都江東区木場１丁目５番１号 株式会 社フジクラ内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takenori Nakajima 1-5-1 Kiba, Koto-ku, Tokyo Fujikura Stock Company (72) Inventor Satoru Yamaoka 1-1-5 Kiba, Koto-ku, Tokyo Stock Association Inside Fujikura
Claims (3)
凸が設けられた母粒子と、第２の材料により形成され前
記母粒子に付着された子粒子とを有することを特徴とす
る複合粉体。1. A composite powder comprising mother particles formed of a first material and having irregularities on the surface thereof, and child particles formed of a second material and attached to the mother particles. body.
凸が設けられた母粒子に、第２の材料により形成された
子粒子を付着させる工程を有することを特徴とする複合
粉体の製造方法。2. A process for producing a composite powder, comprising the step of adhering child particles formed of the second material to mother particles formed of the first material and having irregularities on the surface thereof. Method.
されたニッケル粉であることを特徴とする請求項２に記
載の複合粉体の製造方法。3. The method for producing a composite powder according to claim 2, wherein the mother particles are nickel powder formed by a carbonyl method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6034633A JPH07242902A (en) | 1994-03-04 | 1994-03-04 | Composite powder and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6034633A JPH07242902A (en) | 1994-03-04 | 1994-03-04 | Composite powder and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07242902A true JPH07242902A (en) | 1995-09-19 |
Family
ID=12419814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6034633A Pending JPH07242902A (en) | 1994-03-04 | 1994-03-04 | Composite powder and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07242902A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000345201A (en) * | 1999-05-31 | 2000-12-12 | Mitsui Mining & Smelting Co Ltd | Composite copper fine powder and method for producing the same |
| JP2002003278A (en) * | 2000-06-15 | 2002-01-09 | Yoyu Tansanengata Nenryo Denchi Hatsuden System Gijutsu Kenkyu Kumiai | Composite ceramic powder and method for producing the same |
| JP2002015909A (en) * | 2000-04-24 | 2002-01-18 | Seiko Epson Corp | Magnet powder, method for producing bonded magnet, and bonded magnet |
| JP2002015906A (en) * | 2000-04-24 | 2002-01-18 | Seiko Epson Corp | Magnet powder, method for producing bonded magnet, and bonded magnet |
-
1994
- 1994-03-04 JP JP6034633A patent/JPH07242902A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000345201A (en) * | 1999-05-31 | 2000-12-12 | Mitsui Mining & Smelting Co Ltd | Composite copper fine powder and method for producing the same |
| JP2002015909A (en) * | 2000-04-24 | 2002-01-18 | Seiko Epson Corp | Magnet powder, method for producing bonded magnet, and bonded magnet |
| JP2002015906A (en) * | 2000-04-24 | 2002-01-18 | Seiko Epson Corp | Magnet powder, method for producing bonded magnet, and bonded magnet |
| JP2002003278A (en) * | 2000-06-15 | 2002-01-09 | Yoyu Tansanengata Nenryo Denchi Hatsuden System Gijutsu Kenkyu Kumiai | Composite ceramic powder and method for producing the same |
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