JP3378417B2 - Manufacturing method of raw material powder for permanent magnet - Google Patents
Manufacturing method of raw material powder for permanent magnetInfo
- Publication number
- JP3378417B2 JP3378417B2 JP24296895A JP24296895A JP3378417B2 JP 3378417 B2 JP3378417 B2 JP 3378417B2 JP 24296895 A JP24296895 A JP 24296895A JP 24296895 A JP24296895 A JP 24296895A JP 3378417 B2 JP3378417 B2 JP 3378417B2
- Authority
- JP
- Japan
- Prior art keywords
- compound
- metal
- permanent magnet
- iron powder
- raw material
- 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 - Fee Related
Links
- 239000000843 powder Substances 0.000 title claims description 27
- 239000002994 raw material Substances 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 33
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 30
- 150000001875 compounds Chemical class 0.000 claims description 28
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 15
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 15
- 229910052727 yttrium Inorganic materials 0.000 claims description 14
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910002588 FeOOH Inorganic materials 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- 229910052598 goethite Inorganic materials 0.000 claims description 5
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims 2
- 238000009792 diffusion process Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000000748 compression moulding Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910018657 Mn—Al Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910000828 alnico Inorganic materials 0.000 description 1
- SDIXRDNYIMOKSG-UHFFFAOYSA-L disodium methyl arsenate Chemical compound [Na+].[Na+].C[As]([O-])([O-])=O SDIXRDNYIMOKSG-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 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
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/112—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles with a skin
Landscapes
- Health & Medical Sciences (AREA)
- Dermatology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は磁気特性に優れた永久磁
石原料粉末の製造法に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a permanent magnet having excellent magnetic properties.
The present invention relates to a method for producing stone raw material powder .
【０００２】[0002]
【従来の技術】特性の優れた磁石として、フェライト磁
石、Ａｌｎｉｃｏ磁石、Ｍｎ−Ｂｉ磁石、Ｍｎ−Ａｌ磁
石、Ｓｍ−Ｃｏ磁石、Ｓｍ・Ｐｒ−Ｃｏ磁石、Ｆｅ−Ｎ
ｄ−Ｂ磁石などが開発され、実用化されている。この中
でもＦｅ−Ｎｄ−Ｂ磁石は最も高い最大エネルギー積
（ＢＨ）ｍａｘを有する永久磁石として賞用されてい
る。特公昭６１−３４２４２号にはＦｅ−Ｂ（原子百分
比で２〜２８％）−Ｒ（希土類元素：原子百分比で８〜
３０％）成分よりなる磁気異方性燒結永久磁石が開示さ
れているが、製造に当っては、まず上記成分を含有する
鋳造合金を製造し、次いで鋳造合金を粉末化した後成型
燒結する必要があり、鋳造合金塊の粉末化にコストがか
かる。またバッチごとに性能が異なるという問題もあ
る。2. Description of the Related Art Ferrite magnets, Alnico magnets, Mn-Bi magnets, Mn-Al magnets, Sm-Co magnets, Sm.Pr-Co magnets, Fe-N magnets have excellent characteristics.
A d-B magnet or the like has been developed and put into practical use. Among them, the Fe-Nd-B magnet is prized as a permanent magnet having the highest maximum energy product (BH) max. In Japanese Examined Patent Publication No. 61-34242, Fe-B (2-28% by atomic percentage) -R (rare earth element: 8-by atomic percentage).
Although a magnetic anisotropic sintered permanent magnet composed of 30%) component is disclosed, it is necessary to manufacture a cast alloy containing the above components first, and then powder the cast alloy and then form and sintered it. Therefore, it is costly to powder the cast alloy ingot. There is also the problem that the performance varies from batch to batch.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、製造が容易
で磁気特性に優れた永久磁石原料粉末の製造法を提供す
ることを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing a permanent magnet raw material powder which is easy to produce and has excellent magnetic properties.
【０００４】本発明により製造される永久磁石原料粉末
は、イットリウム（Ｙ）及びイッテルビウム（Ｙｂ）の
うちの少なくとも１種を１．５〜１０重量％並びにコバ
ルト（Ｃｏ）及びニッケル（Ｎｉ）のうちの少なくとも
１種を３〜１０重量％含有する針状鉄粉の表面に、イッ
トリウム（Ｙ）及びイッテルビウム（Ｙｂ）のうちの少
なくとも１種及びマンガン（Ｍｎ）よりなる被覆拡散層
を有するものである。被覆拡散層におけるイットリウム
及びイッテルビウムのうちの少なくとも１種の含有量が
針状鉄粉に対し２〜５重量％、マンガンの含有量が針状
鉄粉に対し０．５〜２重量％であることが好ましい。[0004] Permanent magnet material powder more is produced in the present invention, the yttrium (Y) and ytterbium at least one kind of 1.5 to 10 wt% and cobalt of the (Yb) (Co) and nickel (Ni) at least one among the surfaces of the acicular iron powder containing 3 to 10 wt%, those with at least one and coating diffusion layer made of manganese (Mn) of yttrium (Y) and ytterbium (Yb) There is . The content of at least one of yttrium and ytterbium in the coating diffusion layer is 2 to 5% by weight with respect to the acicular iron powder, and the content of manganese is 0.5 to 2% by weight with respect to the acicular iron powder. Is preferred.
【０００５】[0005]
【課題を解決するための手段】
本発明の永久磁石原料粉
末の製造法は、ＦｅＯＯＨ（ゲータイト）針状結晶にイ
ットリウム金属又はその化合物及びイッテルビウム金属
又はその化合物のうちの少なくとも１種並びにコバルト
金属又はその化合物及びニッケル金属又はその化合物の
うちの少なくとも１種を添加し付着させた状態で還元性
雰囲気中で３００〜５００℃に加熱し還元することより
なる針状鉄粉製造工程、及び該針状鉄粉にイットリウム
金属又はその化合物及びイッテルビウム金属又はその化
合物のうちの少なくとも１種及びマンガン金属又はその
化合物を添加し還元性雰囲気中で６５０〜１０００℃に
加熱することにより針状鉄粉の表面にイットリウム及び
イッテルビウムのうちの少なくとも１種及びマンガンよ
りなる被覆拡散層を設ける工程よりなることを特徴とす
る。 A method for producing a permanent magnet raw material powder according to the present invention comprises: FeOOH (goethite) acicular crystals, at least one of yttrium metal or its compound and ytterbium metal or its compound, and cobalt metal or Needle-like iron powder manufacturing process comprising heating by reducing at 300 to 500 ° C. in a reducing atmosphere in a state in which at least one of the compound and nickel metal or the compound is added and attached, and the needle-like iron powder By adding at least one of yttrium metal or a compound thereof and ytterbium metal or a compound thereof and manganese metal or a compound thereof to iron powder and heating the iron powder to 650 to 1000 ° C in a reducing atmosphere, Coated diffusion layer comprising at least one of yttrium and ytterbium and manganese Characterized by comprising the step of providing.
【０００６】針状鉄粉の粒径は長さ１０μｍ以下のも
の、例えば長さ１．０μｍ、幅０．１μｍ程度のものが
好ましい。所望の針状鉄粉の粒径に対応する粒径を有す
るＦｅＯＯＨ（ゲータイト）針状結晶にＹｔ金属微粉末
又はその化合物及びＹｂ金属微粉末又はその化合物のう
ちの少なくとも１種並びにＣｏ金属微粉末又はその化合
物及びＮｉ金属微粉末又はその化合物のうちの少なくと
も１種を添加し付着させた状態で還元性雰囲気中で３０
０〜５００℃に加熱し還元することにより針状鉄粉が得
られる。It is preferable that the acicular iron powder has a particle size of 10 μm or less in length, for example, 1.0 μm in length and 0.1 μm in width. FeOOH (goethite) acicular crystals having a particle size corresponding to the desired acicular iron powder particle size, and at least one of Yt metal fine powder or a compound thereof and Yb metal fine powder or a compound thereof and Co metal fine powder. Alternatively, at least one of the compound and Ni metal fine powder or the compound is added and adhered in a reducing atmosphere in an amount of 30
Needle-shaped iron powder is obtained by heating at 0 to 500 ° C. and reducing.
【０００７】次いでこの針状鉄粉にイットリウム金属又
はその化合物及びイッテルビウム金属又はその化合物の
うちの少なくとも１種及びマンガン金属又はその化合物
を添加し還元性雰囲気中で６５０〜１０００℃に加熱す
ることにより針状鉄粉の表面にイットリウム及びイッテ
ルビウムのうちの少なくとも１種及びマンガンよりなる
被覆拡散層を設ける工程よりなる。この被覆拡散層の厚
さは針状鉄粉の幅の十分の一程度、例えば針状鉄粉の幅
が０．１μｍの場合は被覆拡散層の厚さは０．０１μｍ
程度が好ましい。Then, yttrium metal or a compound thereof and at least one of ytterbium metal or a compound thereof and manganese metal or a compound thereof are added to the acicular iron powder and heated to 650 to 1000 ° C. in a reducing atmosphere. The process comprises providing a coating diffusion layer made of at least one of yttrium and ytterbium and manganese on the surface of the acicular iron powder. The thickness of the coating diffusion layer is about one tenth of the width of the acicular iron powder, for example, when the width of the acicular iron powder is 0.1 μm, the thickness of the coating diffusion layer is 0.01 μm.
A degree is preferable.
【０００８】上記の永久磁石原料粉末とバインダーを混
合し、磁場の存在下で加熱圧縮成型することにより磁気
異方性永久永久磁石が得られる。ここで磁場を存在させ
ることにより針状鉄粉は垂直配向する。圧縮成型条件は
通常ボンド永久磁石の製造に用いられる条件で良い。バ
インダーとしてはエポキシ樹脂、ポリアミド樹脂などの
高分子材料系のもの、又はガラス化剤を用いる。ガラス
化剤としては、例えばＭｎＯ，ＣｕＯ，Ｂｉ２ Ｏ３ ，
ＰｂＯ，Ｔｌ２ Ｏ３ ，Ｓｂ２ Ｏ３ ，Ｆｅ２Ｏ３ な
ど、或はこれらの組み合わせが挙げられる。A magnetic anisotropic permanent magnet is obtained by mixing the above-mentioned permanent magnet raw material powder and a binder and heating and compression molding in the presence of a magnetic field. The acicular iron powder is vertically oriented by the presence of the magnetic field. The compression molding conditions may be those normally used for the production of bonded permanent magnets. As a binder, a polymer material such as an epoxy resin or a polyamide resin, or a vitrifying agent is used. Examples of the vitrifying agent include MnO, CuO, Bi 2 O 3 ,
Examples thereof include PbO, Tl 2 O 3 , Sb 2 O 3 , Fe 2 O 3 and the like, or a combination thereof.
【０００９】また、上記の永久磁石原料粉末を磁場の存
在下で圧縮成型し加熱燒結することにより燒結永久磁石
が得られる。ここで磁場を存在させることにより針状鉄
粉は垂直配向する。圧縮成型条件や加熱燒結条件は従来
の燒結磁石製造条件と同じで良い。A sintered permanent magnet can be obtained by compression molding the above-mentioned permanent magnet raw material powder in the presence of a magnetic field and heating and sintering. The acicular iron powder is vertically oriented by the presence of the magnetic field. The compression molding conditions and the heat-sintered conditions may be the same as the conventional sintered magnet manufacturing conditions.
【００１０】以下実施例により本発明を具体的に説明す
るが、本発明は下記の実施例に限定されるものではな
い。The present invention will be specifically described with reference to the following examples, but the present invention is not limited to the following examples.
【００１１】[0011]
【実施例１】ＦｅＯＯＨ（ゲータイト：チタン工業株式
会社製）針状結晶に、ニッケル金属微粉末、コバルト金
属微粉末及びイットリウム金属微粉末を添加し付着さ
せ、これをロータリー炉に入れ水素１００容量％よりな
るガスを１０リッター／分の割合で流しながら４００℃
（昇温速度及び降温速度は５℃／分）で１時間還元処理
して長さ１．０μｍ、幅０．１μｍの針状鉄粉を得た。
この針状鉄粉の分析値を表１に示す。この針状鉄粉１０
０重量部にイッテルビウム金属微粉末３．０重量部及び
マンガン金属微粉末１．０重量部を添加し、水素１０容
量％及び窒素９０容量％よりなる還元性雰囲気中で８８
０℃（昇温速度及び降温速度は５℃／分）で５時間加熱
して針状鉄粉の表面にイッテルビウム及びマンガンより
なる被覆拡散層を有する永久磁石原料粉末を得た。Example 1 Nickel metal fine powder, cobalt metal fine powder, and yttrium metal fine powder were added to and adhered to FeOOH (Goethite: manufactured by Titanium Industry Co., Ltd.) needle crystals, which were placed in a rotary furnace and 100% by volume of hydrogen was added. 400 ℃ while flowing the gas consisting of 10 liters / minute
(The temperature raising rate and the temperature lowering rate were 5 ° C./minute), and the acicular iron powder having a length of 1.0 μm and a width of 0.1 μm was obtained by reduction treatment for 1 hour.
Table 1 shows the analytical values of this acicular iron powder. This needle-shaped iron powder 10
3.0 parts by weight of ytterbium metal fine powder and 1.0 parts by weight of manganese metal fine powder were added to 0 parts by weight of the mixture, and 88% in a reducing atmosphere consisting of 10% by volume of hydrogen and 90% by volume of nitrogen.
The powder was heated at 0 ° C. (the temperature rising rate and the temperature lowering rate were 5 ° C./minute) for 5 hours to obtain a permanent magnet raw material powder having a coating diffusion layer made of ytterbium and manganese on the surface of the acicular iron powder.
【００１２】[0012]
【表１】 [Table 1]
【００１３】この永久磁石原料粉末にのエポキシ系バイ
ンダー（ソマールＦ２４６）５重量％を加え、磁界（２
０ＫＯｅ）中で成形してボンド磁石を得た。この磁石の
磁気特性を測定した結果を、従来のＦｅ・Ｎｄ・Ｂ系磁
石に関する文献値（加藤哲男著：「技術者のための磁気
・磁性材料」１９９１年１０月３０日：日刊工業新聞社
発行；１５１頁及び１６０頁）と共に表１に示す。また
この磁石のヒステリシス曲線を図１に示す。5% by weight of an epoxy binder (Somar F246) was added to this permanent magnet raw material powder, and a magnetic field (2
It was molded in 0 KOe) to obtain a bonded magnet. The results of measuring the magnetic characteristics of this magnet are the literature values regarding the conventional Fe / Nd / B-based magnet (Tetsuo Kato: "Magnetic and magnetic materials for engineers" October 30, 1991: Nikkan Kogyo Shimbun Issued; pages 151 and 160) and shown in Table 1. The hysteresis curve of this magnet is shown in FIG.
【００１４】[0014]
【表２】 [Table 2]
【００１５】本発明により製造される永久磁石原料粉末
は、従来のボンド永久磁石や燒結永久磁石原料としての
用途のほか、磁性体の帯を有するバンクカード、クレジ
ットカード、プリペイドカードなどの磁気記録カードの
磁性体原料として好適である。このようなカードは現在
の社会で数十億枚使用されているが、保磁力が数百エル
ステッド程度の低い値なので、家庭や職場に存在する磁
石利用商品、例えば磁気ネックレス、磁気利用玩具、磁
気利用文具などと不用意に接触させることにより磁気記
録が消滅したり変化したりする危険が大きい。また犯罪
的意図で磁気記録を書き換えることも比較的容易であ
る。本発明により得られる永久磁石原料粉末は保磁力が
高いので、家庭や職場に存在する磁石利用商品によって
磁気記録が消滅したり変化したりする恐れがなくなり、
また犯罪的意図での書き換えも困難になるので、磁気記
録カードの信頼性と利用価値が向上する。The permanent magnet raw material powder produced according to the present invention is used as a conventional bonded permanent magnet or a sintered permanent magnet raw material, and also a magnetic recording card such as a bank card, a credit card or a prepaid card having a magnetic strip. Is suitable as the magnetic material raw material. Billions of such cards are used in today's society, but the coercive force is as low as hundreds of oersteds, so products using magnets such as magnetic necklaces, magnetic toys, and magnets that exist in homes and workplaces. There is a great risk that the magnetic recording may be erased or changed by inadvertently contacting it with a stationery. It is also relatively easy to rewrite the magnetic recording with a criminal intention. Since the permanent magnet raw material powder obtained by the present invention has a high coercive force, there is no fear that the magnetic recording will be erased or changed depending on the magnet-using products existing in the home or workplace,
In addition, since it is difficult to rewrite with a criminal intention, the reliability and utility value of the magnetic recording card are improved.
【００１６】[0016]
【発明の効果】製造が容易な永久磁石原料粉末の製造法
である。 EFFECTS OF THE INVENTION Manufacturing method of permanent magnet raw material powder which is easy to manufacture
Is.
【図１】実施例１の永久磁石のヒステリシス曲線であ
る。FIG. 1 is a hysteresis curve of a permanent magnet of Example 1.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−166203（ＪＰ，Ａ) 特開 昭59−129703（ＪＰ，Ａ) 特開 平１−304713（ＪＰ，Ａ) 特開 平７−235439（ＪＰ，Ａ) 特開 平４−247811（ＪＰ，Ａ) 特開 平７−106110（ＪＰ，Ａ) 特開 平８−165501（ＪＰ，Ａ) 特開 昭56−112435（ＪＰ，Ａ) 特開 平６−251918（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 1/00 - 1/117 B22F C22C ─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-7-166203 (JP, A) JP-A-59-129703 (JP, A) JP-A-1-304713 (JP, A) JP-A-7- 235439 (JP, A) JP-A-4-247811 (JP, A) JP-A-7-106110 (JP, A) JP-A-8-165501 (JP, A) JP-A-56-112435 (JP, A) JP-A-6-251918 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) H01F 1/00-1/117 B22F C22C
Claims (3)
ットリウム金属又はその化合物及びイッテルビウム金属
又はその化合物のうちの少なくとも１種並びにコバルト
金属又はその化合物及びニッケル金属又はその化合物の
うちの少なくとも１種を添加し付着させた状態で還元性
雰囲気中で３００〜５００℃に加熱し還元することより
なる針状鉄粉製造工程、及び該針状鉄粉にイットリウム
金属又はその化合物及びイッテルビウム金属又はその化
合物のうちの少なくとも１種及びマンガン金属又はその
化合物を添加し還元性雰囲気中で６５０〜１０００℃に
加熱することにより針状鉄粉の表面にイットリウム及び
イッテルビウムのうちの少なくとも１種及びマンガンよ
りなる被覆拡散層を設ける工程よりなることを特徴とす
る永久磁石原料粉末の製造法。 1. FeOOH (goethite) needle-like crystals to which at least one of yttrium metal or a compound thereof and ytterbium metal or a compound thereof and at least one of cobalt metal or a compound thereof and nickel metal or a compound thereof are added. Of the yttrium metal or the compound thereof and the ytterbium metal or the compound of the acicular iron powder, which is produced by heating the acicular iron powder to 300 to 500 ° C. to reduce the acicular iron powder. Of at least one of yttrium and ytterbium and manganese on the surface of the acicular iron powder by adding at least one of the above and manganese metal or a compound thereof and heating to 650 to 1000 ° C. in a reducing atmosphere. Permanent magnet raw material powder characterized by comprising the step of providing Manufacturing method.
加するイットリウム金属又はその化合物及びイッテルビ
ウム金属又はその化合物のうちの少なくとも１種の添加
量が鉄成分に対し金属として１．５〜１０重量％、コバ
ルト金属又はその化合物及びニッケル金属又はその化合
物のうちの少なくとも１種の添加量が鉄成分に対し金属
として３〜１０重量％である請求項１に記載の永久磁石
原料粉末の製造法。 2. The amount of at least one of yttrium metal or its compound and ytterbium metal or its compound added to FeOOH (goethite) needle crystals is 1.5 to 10% by weight as a metal with respect to the iron component. The method for producing a permanent magnet raw material powder according to claim 1 , wherein the addition amount of at least one of cobalt metal or a compound thereof and nickel metal or a compound thereof is 3 to 10% by weight as a metal with respect to the iron component.
はその化合物及びイッテルビウム金属又はその化合物の
うちの少なくとも１種の添加量が針状鉄粉に対し２〜５
重量％、マンガン金属又はその化合物の添加量が針状鉄
粉に対し０．５〜２重量％である請求項１に記載の永久
磁石原料粉末の製造法。3. The addition amount of at least one of yttrium metal or a compound thereof and ytterbium metal or a compound thereof added to the acicular iron powder is 2 to 5 with respect to the acicular iron powder.
The method for producing a permanent magnet raw material powder according to claim 1 , wherein the amount of the manganese metal or its compound added is 0.5 to 2% by weight with respect to the acicular iron powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24296895A JP3378417B2 (en) | 1995-09-21 | 1995-09-21 | Manufacturing method of raw material powder for permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24296895A JP3378417B2 (en) | 1995-09-21 | 1995-09-21 | Manufacturing method of raw material powder for permanent magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0992516A JPH0992516A (en) | 1997-04-04 |
| JP3378417B2 true JP3378417B2 (en) | 2003-02-17 |
Family
ID=17096916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24296895A Expired - Fee Related JP3378417B2 (en) | 1995-09-21 | 1995-09-21 | Manufacturing method of raw material powder for permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3378417B2 (en) |
-
1995
- 1995-09-21 JP JP24296895A patent/JP3378417B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0992516A (en) | 1997-04-04 |
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