JPS61198703A - Manufacture of rare earth element-cobalt group magnet powder for resin magnet - Google Patents
Manufacture of rare earth element-cobalt group magnet powder for resin magnetInfo
- Publication number
- JPS61198703A JPS61198703A JP60037702A JP3770285A JPS61198703A JP S61198703 A JPS61198703 A JP S61198703A JP 60037702 A JP60037702 A JP 60037702A JP 3770285 A JP3770285 A JP 3770285A JP S61198703 A JPS61198703 A JP S61198703A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- resin
- powder
- magnet powder
- samarium
- 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
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
- H01F1/04—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 metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0551—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、優れた磁気的特性を有し樹脂磁石用に好適の
１−５系希土類元素−コバルト磁石粉末を溶解法により
て製造する方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for producing 1-5 rare earth element-cobalt magnet powder, which has excellent magnetic properties and is suitable for use in resin magnets, by a melting method. Regarding.
樹脂磁石用の１−５系希土類元素−コバルト磁石粉末は
、２−１７系のものに比較して、高い磁気的特性を得る
に最適な粉末の粒径がより小さく、従って樹脂とのなじ
みや混練成形時の流動性、均一性などにおいて有利なこ
とから好んで用いられている。このような１−５基磁石
粉末としては、従来、希土類元素をサマリウムのみとし
たものが用いられており、また、この磁石粉末を製造す
る際には、高周波溶解、アーク溶解のような溶解法によ
りて溶解−造して得たサマリウム−コバルト合金鋳塊を
熱処理をすることなく粉砕する方法が採用されている。The 1-5 series rare earth element-cobalt magnet powder for resin magnets has a smaller particle size, which is optimal for obtaining high magnetic properties, than the 2-17 series, and therefore it is less compatible with the resin. It is preferably used because it is advantageous in terms of fluidity and uniformity during kneading and molding. Conventionally, such 1-5 base magnet powder is made using only samarium as the rare earth element, and when producing this magnet powder, melting methods such as high frequency melting and arc melting are used. A method has been adopted in which a samarium-cobalt alloy ingot obtained by melting and forming is pulverized without heat treatment.
しかしながら、このようにして得た磁石粉末は、保磁力
は高いが、残留磁束密度が低いという欠点がありた。However, the magnetic powder obtained in this manner has a high coercive force, but has the drawback of a low residual magnetic flux density.
本発明者等は、上記のエラな観点から、残留磁束密度が
向上した高い紋大エネルギー積を有する樹脂磁石用磁石
粉末を得るべく、鋭意研死した。From the above-mentioned point of view, the inventors of the present invention have worked hard to obtain magnet powder for resin magnets that has an improved residual magnetic flux density and a high energy product.
その結果、溶解鋳造してサマリクムープラセオジムーコ
バルト合金鋳塊を得、該合金鋳塊に６００〜９００℃で
３０分〜５Ｆ￥ｆ間加熱して急冷する熱処理を施した後
、粉砕して、その組成がＳｍ １．Ｐｒ、Ｃｏ、 （但
し、０．０５≦Ｘ≦０．４ 、４．７≦ｚ≦５．３）で
表わされる磁石粉末を得るようにすることによりて、前
記目的が達成され得ることを見出したものである。As a result, a samarikmu praseodymium-cobalt alloy ingot was obtained by melting and casting, and the alloy ingot was heat-treated at 600-900°C for 30 minutes to 5F￥f and then rapidly cooled, and then crushed. , whose composition is Sm 1. We have found that the above object can be achieved by obtaining magnetic powder represented by Pr, Co, (0.05≦X≦0.4, 4.7≦z≦5.3) It is something that
以下、本発明を更に詳細に説明する。 The present invention will be explained in more detail below.
本発明において、溶解鋳造で得られたサマリウム−グラ
セオジム−コバルト合金鋳塊は、６００〜９００℃で３
０分〜５時間加熱して急冷する熱処理をして粉砕する必
要がある。こうすることＫよって、熱処理することなく
粉砕するよりも優れた磁気的特性を有する磁石粉末を得
ることができる。In the present invention, the samarium-graseodymium-cobalt alloy ingot obtained by melting and casting is heated at 600 to 900°C.
It is necessary to perform heat treatment by heating for 0 minutes to 5 hours and then rapidly cooling the powder. By doing so, it is possible to obtain a magnet powder having better magnetic properties than that obtained by pulverizing without heat treatment.
上記熱処理のうち、加熱が６００℃未満、３０分未満で
は、生成してい友異相を１−５系の単相にし、かつ熱歪
を取って安定な保磁力を得せしめるという熱処理の効果
が十分得られず、一方９００℃を超え、５時間を超える
と、得られる磁石粉末の組成が前記の限定範囲から外れ
易く、１−５系以外の異相が生成し易くなるため、加熱
条件を６００〜９００℃で３０分〜５時間とした。Among the above heat treatments, heating at less than 600°C for less than 30 minutes has sufficient effect of converting the formed heterogeneous phase into a single 1-5 phase and removing thermal strain to obtain a stable coercive force. On the other hand, if the temperature exceeds 900°C for more than 5 hours, the composition of the obtained magnet powder tends to deviate from the above-mentioned limited range, and different phases other than the 1-5 system tend to be generated. The temperature was 900°C for 30 minutes to 5 hours.
粉砕して得られた樹脂磁石用磁石粉末の組ａｌ：ｓｍ１
．。Set of magnet powder for resin magnets obtained by pulverization al: sm1
．． .
Ｐｒ、Ｃｏ、 （但し、０．０５≦Ｘ≦０．４．４７
≦ｚ≦５．３）としたのは、Ｘが０．０５未満ではプラ
セオジムの添加による残留磁束密度の向上が十分でなく
、一方Ｘが０．４を超えると保磁力が急激に低下するか
らで、また、２が４７未満では製造された磁石粉末中に
１−３系や２−７系の異相が生成して残留磁束密度が低
下し易く、一方２が５．３を超えると２−１７系の異相
が生成して保磁力が低下し易いからである。Pr, Co, (however, 0.05≦X≦0.4.47
≦z≦5.3) because if X is less than 0.05, the improvement in residual magnetic flux density due to the addition of praseodymium will not be sufficient, whereas if X exceeds 0.4, the coercive force will decrease rapidly. Also, if 2 is less than 47, 1-3 and 2-7 different phases are likely to be generated in the produced magnet powder, resulting in a decrease in residual magnetic flux density, while if 2 is more than 5.3, 2- This is because the coercive force tends to decrease due to the formation of a 17-based different phase.
以下、本発明を実施例について説明する。 Hereinafter, the present invention will be described with reference to examples.
実施例１
金属５ＦＦＩ、金属Ｐｒ及び金３ｉＣｏ を所定の組成
になるように配合して（全量的１． ＯＯＯｇ）高周波
溶解炉で溶解鋳造した。鋳造は同じ鋳型を２個用意して
ほぼ同大の鋳塊を２本作成した。これらの鋳塊のつち、
１本は一３５メックユが全量になるまで粗粉砕した後、
エチルアルコールを充満した回転ボールミルで５時間微
粉外したが、他の１本はＡｒ 中６２０℃で２時間保持
して急冷する熱処理を施した後、上記粗粉砕及び微粉砕
を行なった。Example 1 Metal 5FFI, metal Pr, and gold 3iCo were blended to a predetermined composition (total amount 1.00g) and melted and cast in a high frequency melting furnace. For casting, two identical molds were prepared and two ingots of approximately the same size were created. These ingots,
After coarsely crushing one bottle until the total amount is 135 mekuyu,
The powder was removed using a rotary ball mill filled with ethyl alcohol for 5 hours, but the other one was heat-treated by being held at 620° C. for 2 hours in Ar and rapidly cooled, and then subjected to the above-mentioned coarse and fine pulverization.
微粉砕して得られた試料の組成は、熱処理を施さないも
のと施したものとで全数同様でありた。分析の結果、得
られた組成を第１表に示す。また、微粉末試料の平均粒
反は全数３〜１０μｍの範囲８簿ありた。The compositions of the samples obtained by pulverization were the same for both samples that were not subjected to heat treatment and those that were subjected to heat treatment. The composition obtained as a result of the analysis is shown in Table 1. Further, the average grain size of the fine powder samples was 8 in total, ranging from 3 to 10 μm.
第１表
以上のようにして用意した磁石粉末に対して、ａｔ脂と
してエポキシ樹脂を外側で５． Ｏ重量％添加混合し、
１３ ＫＯｅの磁場中４ｔｏｎ／ｆｆｌの圧力で圧縮成
形した後、成形体を１２０℃のオーブン中で２時間保持
してエポキシ樹脂を硬化させた。得られた樹脂磁石の磁
気的特性を測定した結果を第２表に示す。For the magnet powder prepared as shown in Table 1 above, 5. Add and mix O weight %,
After compression molding in a magnetic field of 13 KOe at a pressure of 4 ton/ffl, the molded body was held in an oven at 120° C. for 2 hours to harden the epoxy resin. Table 2 shows the results of measuring the magnetic properties of the obtained resin magnet.
実施例２
実施例１の試験随１および２の配合で高周波溶解炉で溶
解し、鋳造して舟之鋳塊のうち、１者は実施例１で熱処
理しない方の操作と同様に微粉砕までしく試験醜９）、
後者は所定のＡｒ中加熱後急冷する熱処理を施し友後、
実施例１と同様に粗粉砕、微粉砕した（試験Ｎｌｌ０〜
１９）。Example 2 The compositions of Tests 1 and 2 of Example 1 were melted in a high-frequency melting furnace, cast, and one of the ingots was pulverized in the same manner as in Example 1 without heat treatment. Shikaku Exam Ugly 9),
The latter is heated in a predetermined argon atmosphere and then rapidly cooled.
Coarse pulverization and fine pulverization were carried out in the same manner as in Example 1 (Test Nll0~
19).
以上のようＫして用意した磁石粉末に対して、樹脂とし
てポリアミド樹脂（ナイａ：ｙ６ ）を処罰で９．０重
量％添加混緯し、ベレット化した後、１０ＫＯｅの磁場
中で射出成形した。得られた樹脂磁石の磁気的＃ｆ性を
測定した結果を第３表に示す。To the magnet powder prepared by K as described above, 9.0% by weight of polyamide resin (Nia: Y6) was added as a resin, and after forming into pellets, injection molding was carried out in a magnetic field of 10 KOe. . Table 3 shows the results of measuring the magnetic #f properties of the obtained resin magnets.
以上から明らかなように１本発明は、溶解法によりて、
残留磁束密夏が向上した高い最大エネルギー積を有する
樹脂磁石用に好適の１−５系希土類元素−コバルト磁石
粉末を熱処理を行なうことによって製造することができ
るものである。また、サマリウムを一部置換す゛るプラ
七オジムはサマリウムより豊富で安価であり、従って、
樹脂磁石用に好適の１−５系希土類元素−コバルト磁石
粉末を安価に製造することのできる本発明の工業的意義
は非富に大である。As is clear from the above, one aspect of the present invention is to use a dissolution method to
A 1-5 rare earth element-cobalt magnet powder suitable for resin magnets having an improved residual magnetic flux density and a high maximum energy product can be produced by heat treatment. In addition, pranaozym, which partially replaces samarium, is more abundant and cheaper than samarium, and therefore,
The industrial significance of the present invention, which allows the production of 1-5 rare earth element-cobalt magnet powder suitable for resin magnets at low cost, is enormous.
Claims (1)
ト合金鋳塊を得、該合金鋳塊に６００〜９００℃で３０
分〜５時間加熱して急冷する熱処理を施した後、粉砕し
て、その組成がＳｍ＿１＿ｘＰｒ＿ｘＣｏ＿ｚ（但し、
０．０５≦ｘ≦０．４、４．７≦ｚ≦５．３）で表わさ
れる磁石粉末を得ることを特徴とする樹脂磁石用希土類
元素−コバルト系磁石粉末の製造方法。(1) Obtain a samarium-graseodymium-cobalt alloy ingot by melting and casting.
After a heat treatment of heating for 5 hours to 5 hours and quenching, it is pulverized and the composition is Sm_1_xPr_xCo_z (however,
0.05≦x≦0.4, 4.7≦z≦5.3.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60037702A JPS61198703A (en) | 1985-02-28 | 1985-02-28 | Manufacture of rare earth element-cobalt group magnet powder for resin magnet |
| US07/219,856 US4865660A (en) | 1985-02-28 | 1988-07-13 | Rare-earth element/cobalt type magnet powder for resin magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60037702A JPS61198703A (en) | 1985-02-28 | 1985-02-28 | Manufacture of rare earth element-cobalt group magnet powder for resin magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61198703A true JPS61198703A (en) | 1986-09-03 |
Family
ID=12504857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60037702A Pending JPS61198703A (en) | 1985-02-28 | 1985-02-28 | Manufacture of rare earth element-cobalt group magnet powder for resin magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61198703A (en) |
-
1985
- 1985-02-28 JP JP60037702A patent/JPS61198703A/en active Pending
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