JPS5845118A - Manufacture of ferrite powder - Google Patents
Manufacture of ferrite powderInfo
- Publication number
- JPS5845118A JPS5845118A JP56143081A JP14308181A JPS5845118A JP S5845118 A JPS5845118 A JP S5845118A JP 56143081 A JP56143081 A JP 56143081A JP 14308181 A JP14308181 A JP 14308181A JP S5845118 A JPS5845118 A JP S5845118A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- powder
- fine powder
- metal
- alkoxide
- 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
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は金属アルコキシドの２種又は２種以上を混合し
、加水分解して均一な微粉末からなる六方晶フェライト
を得るための製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manufacturing method for mixing two or more metal alkoxides and hydrolyzing the mixture to obtain hexagonal ferrite consisting of a uniform fine powder.
六方晶フェライトの微粉末を得る方法としては。How to obtain fine powder of hexagonal ferrite.
一般に金属塩などの水溶液から共沈によって得る方法が
あることは周知である。しかし、上記の方法により所望
とするフェライト微粉末を生成し。It is generally known that there is a method for obtaining a metal salt from an aqueous solution by coprecipitation. However, the desired ferrite fine powder cannot be produced by the above method.
これを焼結しても、あるいは通常の粉末法に従い。This can be sintered or according to the usual powder method.
該フェライト粉末な仮焼、粉砕、プレスを行なった後焼
結しても、焼結体の局部的不均質や焼結密度は必らずし
も改善されず１通常の方法で作製したフェライト、すな
わち金属酸化物あるいは金属炭酸塩などの混合によって
得たフェライトと比較しても顕著な差異が見られない欠
点があった。Even if the ferrite powder is calcined, crushed, and pressed and then sintered, the local heterogeneity and sintered density of the sintered body are not necessarily improved. That is, there was a drawback that no significant difference was observed when compared with ferrite obtained by mixing metal oxides or metal carbonates.
本願発明者らは、上記の如き欠点を改良すべく。The inventors of the present application aimed to improve the above-mentioned drawbacks.
微粒子粉末の製造法に関し、研究を進めた結果。The result of research into the manufacturing method of fine particle powder.
金属アルコキシドの加水分解により得られる六方晶フェ
ライトの微粒子粉末は、従来の金属酸化物又は金属炭酸
塩などの混合によって得た゛フェライト粉よりも′粒子
の均質性がよいことを見出し、該事笑に基づいて本発明
を完成したものである。It was discovered that fine hexagonal ferrite powder obtained by hydrolysis of metal alkoxide has better particle homogeneity than conventional ferrite powder obtained by mixing metal oxides or metal carbonates, etc. Based on this, the present invention has been completed.
すなわち１本発明は、ＭＣ０Ｒ）ｎ （ＭけＢａを除く
１〜５価の金属、Ｒはアルキル基）で示される金属アル
コキシドの１種以上と、ＢａＣ０Ｒ）ｎで示される金属
アルコキシドを混合し、加水分解して粒径１μｍ以下の
微粒子を得ることを特徴とするものである。That is, 1 the present invention mixes one or more metal alkoxides represented by MC0R)n (a mono- to pentavalent metal excluding Ba, R is an alkyl group) and a metal alkoxide represented by BaC0R)n, It is characterized by being hydrolyzed to obtain fine particles with a particle size of 1 μm or less.
以下１本発明な実施例に基づいて詳述する。The present invention will be explained in detail below based on one embodiment.
実施例
Ｂａ（Ｃ２Ｈ５０）２とＦｇ （Ｃ５Ｈ７０） Ｓを最
終組成がＢａ０６に’ｇ２０５ になるように一定量配
合し、これにプロビルアルコールを加え、約７０υに加
温して、窒素気流中で１時間還流後、つぎに水を加え、
さらンこアンモニア水を加重てＰＨを調節して約７０ｔ
で１時間沈澱を熟成し０．１μｍ以下の六方晶状非晶質
微粉末を得た。Example: Ba(C2H50)2 and Fg(C5H70)S were blended in a certain amount so that the final composition was 'g205 in Ba06, probyl alcohol was added to this, heated to about 70υ, and heated in a nitrogen stream. After refluxing for 1 hour, water was added,
Approximately 70 tons of Saranko ammonia water was added to adjust the pH.
The precipitate was aged for 1 hour to obtain a hexagonal amorphous fine powder of 0.1 μm or less.
このように金属アルコキシドの加水分解により。Thus by hydrolysis of metal alkoxides.
０１μｍ以下の微粉末のＢαフェライトを得ることがで
きるが、Ｘ線的には非晶質状の性質を示し、完全には六
方晶のｌＪａフェライトは生成しない。そのため、得ら
れた微粉末を一旦加熱処理を施すことにより、結晶性の
よい微粉末とすることも可能である。すなわち、１μｍ
以下の結晶性のよい微粉末としたい場合には、微粉末の
加熱温度は！Ｉ００へ１０００での範囲が望ましい。加
熱温度が１ｏｎｏｖより高くなると粒子は成長し、所望
とする微粒子は得られない。したがって、最良加熱温度
は４００−８００υの温度範囲が好ましい。なお、微粉
末の加熱方法は１通常のように空気中、ｍ素中若しくは
中性の芥囲気などを用いてもよく、また、溶液を調整し
た水熱合成による方法を利用することも一向に差仕えな
い。Although Bα ferrite in the form of a fine powder of 0.01 μm or less can be obtained, it exhibits amorphous properties in X-rays, and completely hexagonal lJa ferrite is not produced. Therefore, by once heating the obtained fine powder, it is possible to obtain a fine powder with good crystallinity. That is, 1 μm
If you want the following fine powder with good crystallinity, what is the heating temperature for the fine powder? A range of I00 to 1000 is desirable. When the heating temperature is higher than 1 onov, the particles grow and the desired fine particles cannot be obtained. Therefore, the best heating temperature is preferably in the temperature range of 400-800υ. Note that the heating method for the fine powder may be the usual method of heating in air, chlorine, or neutral air, or it is also possible to use a method of hydrothermal synthesis using a prepared solution. I don't serve.
十Ｆｉｒ２実施例においてはＵがＳｒおよびＦ−である
場合について述べたが１本発明はこれに限定されるもの
ではなく、永久磁石として有用な組成のフェライト粉末
には全【適用できることはいうまでもない。In the 2nd embodiment, the case where U is Sr and F- was described, but the present invention is not limited to this, and it goes without saying that all ferrite powders with compositions useful as permanent magnets can be used. Nor.
以上１本発明による金属アルコキシドを出発原料として
得た微粉末は１通常の粉末法で得たフェライトに比較し
て為密度にしてかつ均質性のよい尚性能焼結フェライト
を得るのに卓効を示し、氷久媛石材料として用いること
ができるので、その工業的価値は犬である。The fine powder obtained using the metal alkoxide according to the present invention as a starting material is extremely effective in obtaining high-performance sintered ferrite that has a higher density and better homogeneity than ferrite obtained by a conventional powder method. Its industrial value is significant because it can be used as a stone material.
代理人 出 中 寿 徳 “′□ □ 第１頁の続き ■出 願 人 平野眞− 名古屋市東区矢田町２丁目６６番 地名大矢田町宿舎１棟１２３号 ＠出 願 人 岩月章治 名古屋市昭和区広瀬町１丁目２７ 番地Agent Toshiko Izuchu “′□ □ Continuation of page 1 ■Person Makoto Hirano 2-66 Yadamachi, Higashi-ku, Nagoya City Place name: Oyada Town Dormitory 1 Building No. 123 @Person Shoji Iwatsuki 1-27 Hirosecho, Showa-ku, Nagoya City street address
Claims (1)
アルキル基）で示される金属アルコキシドとＢａ（ＯＲ
）ｎで示される金属アルコキシドを混合し。 加水分解して粒径１μｍ以下の微粒子を得ることを特徴
とするバリウム系フェライト粉末の製造方法。[Claims] A metal alkoxide represented by M(OR)n (M is a monovalent to pentavalent metal excluding Ba, R- is an alkyl group) and Ba(OR
) Mix metal alkoxides represented by n. A method for producing barium-based ferrite powder, which comprises hydrolyzing it to obtain fine particles with a particle size of 1 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56143081A JPS5845118A (en) | 1981-09-10 | 1981-09-10 | Manufacture of ferrite powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56143081A JPS5845118A (en) | 1981-09-10 | 1981-09-10 | Manufacture of ferrite powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5845118A true JPS5845118A (en) | 1983-03-16 |
Family
ID=15330464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56143081A Pending JPS5845118A (en) | 1981-09-10 | 1981-09-10 | Manufacture of ferrite powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5845118A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0237081A2 (en) * | 1986-03-14 | 1987-09-16 | Matsushita Electric Industrial Co., Ltd. | Process for the preparation of complex perovskite type compounds |
-
1981
- 1981-09-10 JP JP56143081A patent/JPS5845118A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0237081A2 (en) * | 1986-03-14 | 1987-09-16 | Matsushita Electric Industrial Co., Ltd. | Process for the preparation of complex perovskite type compounds |
| US4918035A (en) * | 1986-03-14 | 1990-04-17 | Matsushita Electric Industrial Co., Ltd. | Process for the preparation of complex perovskite type compounds |
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