JPH0696925A - Bond magnet - Google Patents
Bond magnetInfo
- Publication number
- JPH0696925A JPH0696925A JP4290168A JP29016892A JPH0696925A JP H0696925 A JPH0696925 A JP H0696925A JP 4290168 A JP4290168 A JP 4290168A JP 29016892 A JP29016892 A JP 29016892A JP H0696925 A JPH0696925 A JP H0696925A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- powder
- bonded
- magnet
- constituent
- 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
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
-
- 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
- H01F1/058—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IVa elements, e.g. Gd2Fe14C
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高保磁力を有する永久
磁石粉末を用いた硬質磁性材料、特に合成樹脂や非磁性
金属等と混合したボンド磁石に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard magnetic material using a permanent magnet powder having a high coercive force, and more particularly to a bond magnet mixed with a synthetic resin or a non-magnetic metal.
【０００２】[0002]
【従来の技術】従来、鉄族遷移金属と半金属元素よりな
る例えばＦｅ80Ｂ20に代表されるような組成の非晶質合
金は軟質磁性材料として公知である。又、鉄族遷移金属
とランタニド元素を基本組成とする結晶質合金は硬質磁
性材料としてよく知られているところである。2. Description of the Related Art Conventionally, an amorphous alloy composed of an iron group transition metal and a metalloid element and having a composition represented by Fe 80 B 20 , for example, has been known as a soft magnetic material. Further, a crystalline alloy having an iron group transition metal and a lanthanide element as a basic composition is well known as a hard magnetic material.
【０００３】ところで、上記従来の硬質磁性材料はラン
タニド元素と鉄族遷移金属の組成が原子比で１：５から
２：１７までの合金である。かかる合金をつくるには、
各元素を所定の配合組成としたのち、溶解法あるいは直
接還元法等により得ていたが、２：１７系合金は組成が
複雑であり、直接還元法による製造は困難である。その
ため、現在では、各組成元素を高純度金属として用意
し、不活性ガス中の高周波炉で溶解して得る場合が多
い。しかし、この方法では溶解の途中での組成のずれが
しばしば問題となる。経験的に組成がずれ易い元素は配
合の段階でそのずれを補正すべく配慮しなければならな
い。By the way, the above conventional hard magnetic material is an alloy in which the composition of the lanthanide element and the transition metal of the iron group is 1: 5 to 2:17 in atomic ratio. To make such an alloy,
After obtaining each element with a predetermined composition, it was obtained by a melting method, a direct reduction method, or the like. However, the composition of the 2:17 alloy is complicated, and it is difficult to manufacture it by the direct reduction method. Therefore, at present, it is often the case that each composition element is prepared as a high-purity metal and melted in a high-frequency furnace in an inert gas. However, this method often causes a problem in composition shift during melting. Empirically, elements that tend to shift in composition must be considered to correct the shift at the stage of compounding.
【０００４】そして、溶解によって得られたインゴット
をもって永久磁石をつくるに当っては、焼結法による場
合には、粉砕−磁界中成形−焼結−時効という工程をと
るが、ボンド磁石用の永久磁石粉末を得るには、インゴ
ットから、溶体化処理−時効−粉砕という工程をとる。When a permanent magnet is made from the ingot obtained by melting, when the sintering method is used, the steps of crushing, forming in a magnetic field, sintering, and aging are carried out. In order to obtain magnet powder, the steps of solution treatment, aging and crushing are performed from an ingot.
【０００５】[0005]
【発明が解決しようとする課題】いずれにしても、焼結
法の場合は焼結後、ボンド磁石用の場合は溶体化処理後
に、室温まで急冷することが必要であり、試料もしくは
インゴットが大型の場合には均一急冷ということが問題
となる。In any case, it is necessary to rapidly cool to room temperature after sintering in the case of the sintering method and after solution treatment in the case of a bonded magnet, and thus the sample or the ingot has a large size. In this case, uniform quenching becomes a problem.
【０００６】本発明は、非晶質合金を出発材料として硬
質磁性材料を得るもので、上記製造上の問題を解決し、
高保磁力を有する安定した永久磁石粉末を用いたボンド
磁石である。The present invention is to obtain a hard magnetic material by using an amorphous alloy as a starting material, and solves the above problems in production.
It is a bonded magnet using a stable permanent magnet powder having a high coercive force.
【０００７】[0007]
【課題を解決するための手段】本発明は、構成成分が、
遷移金属（Ｔ）、半金属元素（Ｍ）および希土類元素
（Ｒ）からなり、これら構成成分が下記組成式、 （Ｔ1-XＭX）ZＲ1-Z ただし０．０１≦ｘ≦０．２８ ０．３５≦ｚ≦０．８９ Ｔ：Ｆｅおよび／またはＣｏ、さらにＺｒ，Ｈｆより選
ばれる１種もしくは２種の組合せ、Ｍ：Ｂ，Ｓｉ，Ｃよ
り選ばれる１種もしくは２種以上の組合せ、Ｒ：Ｎｄお
よび／またはＰｒ、さらにＬａ，Ｃｅ，Ｓｍ，Ｔｂ，Ｈ
ｏ，Ｄｙ，Ｙより選ばれる１種もしくは２種以上の組合
せ、より成り、非晶質再結晶粒径の大きさの結晶粒を有
する高保磁力永久磁石粉末を、合成樹脂または非磁性金
属で結合したことを特徴とするボンド永久磁石である。According to the present invention, the constituent components are
It is composed of a transition metal (T), a metalloid element (M) and a rare earth element (R), and these constituent components have the following composition formula: (T 1-X M X ) Z R 1-Z where 0.01 ≦ x ≦ 0 .28 0.35 ≦ z ≦ 0.89 T: Fe and / or Co, and one or two kinds selected from Zr and Hf, and one or more kinds selected from M: B, Si and C. , R: Nd and / or Pr, and further La, Ce, Sm, Tb, H
a high coercive force permanent magnet powder having a crystal grain size of an amorphous recrystallized grain size, which is composed of one or a combination of two or more selected from o, Dy, and Y and is bonded with a synthetic resin or a nonmagnetic metal. This is a bonded permanent magnet characterized by the above.
【０００８】上記において、半金属元素（Ｍ）は、非晶
質合金を得るのに有効な元素である。しかし、この半金
属元素（Ｍ）は磁気特性の上からは合金の飽和磁束密度
（自発磁化σも同様）を低下させる傾向があるので総量
を２５％以下に抑える事が望まれ、その範囲で、上記の
ようにｘおよびｚの数値を決定する。In the above, the semimetal element (M) is an element effective for obtaining an amorphous alloy. However, since this metalloid element (M) tends to reduce the saturation magnetic flux density of the alloy (same as for the spontaneous magnetization σ) from the viewpoint of magnetic characteristics, it is desirable to suppress the total amount to 25% or less. , Determine the numerical values of x and z as described above.
【０００９】すなわち、後述の実施例、比較例を含む多
くの実験の結果、希土類元素（Ｒ）の含有量を規定する
係数１−ｚとしては、自発磁化σが高く、かつ、高い保
磁力ｉＨｃを有する永久磁石材料を得るためには、０．
６５≧１−ｚ≧０．１１の範囲が望ましい。すなわち、
還移金属（Ｔ）＋半金属元素（Ｍ）の含有量を規定する
係数ｚは、０．３５≦ｚ≦０．８９の範囲が望ましいこ
とがわかった。That is, as a result of many experiments including Examples and Comparative Examples described later, as the coefficient 1-z that defines the content of the rare earth element (R), the spontaneous magnetization σ is high and the coercive force iHc is high. In order to obtain a permanent magnet material having
The range of 65 ≧ 1-z ≧ 0.11 is desirable. That is,
It was found that the coefficient z defining the content of the transition metal (T) + metalloid element (M) is preferably in the range of 0.35 ≦ z ≦ 0.89.
【００１０】そして、半金属元素（Ｍ）の総量は、本発
明の組成式においては、（ｘ）×（ｚ）であるから、こ
の値が０．２５以下になるように（Ｍ）の係数ｘの上限
を規定した。すなわち、ｘの上限は０．２５÷０．８９
＝０．２８の式から得られる０．２８とした。又、ｘの
下限の０．０１はその有効性の限界を示すものである。Since the total amount of the metalloid element (M) is (x) × (z) in the composition formula of the present invention, the coefficient of (M) is set so that this value becomes 0.25 or less. The upper limit of x is defined. That is, the upper limit of x is 0.25 / 0.89.
It was set to 0.28 obtained from the formula of 0.28. The lower limit of 0.01, x, indicates the limit of its effectiveness.
【００１１】本発明の永久磁石をつくるには、非晶質合
金材料が用いられる。合金を非晶質化するには、目的と
する組成の合金を溶融状態から高速急冷もしくはスパッ
タ法により、イオンを基板上に到達せしめて急冷する。
こうして得た非晶質合金は、良く溶体化処理されたイン
ゴットと殆ど類似の状態にあり、非常に均一な状態であ
り、上述のように大型インゴットの場合の問題点である
急冷におけるばらつきの心配はない。Amorphous alloy materials are used to make the permanent magnets of the present invention. In order to amorphize the alloy, the alloy having the desired composition is rapidly cooled from the molten state by high-speed rapid cooling or the sputtering method so that the ions reach the substrate and are rapidly cooled.
The amorphous alloy thus obtained is in a state almost similar to that of a well solution-treated ingot and is in a very uniform state. As described above, there is a concern about variations in rapid cooling, which is a problem in the case of a large ingot. There is no.
【００１２】本発明は、かかる非晶質合金材料を適当な
温度で熱処理し、再結晶化して得られる微細な結晶粒を
有する高保磁力永久磁石粉末を、合成樹脂または非磁性
金属で結合したボンド磁石である。The present invention is a bond in which a high coercive force permanent magnet powder having fine crystal grains obtained by heat-treating such an amorphous alloy material at an appropriate temperature and recrystallization is bonded with a synthetic resin or a nonmagnetic metal. It is a magnet.
【００１３】非晶質合金材料を再結晶化して得た永久磁
石粉末は従来のようにインゴットを粉砕して得た粉末に
比べて、結晶粒の大きさが格段に小さく判然としてい
る。そのため、本発明の永久磁石粉末は実施例でも示す
ように、安定した高保磁力永久磁石粉末であり、また、
耐酸化性にすぐれており、ボンド磁石製造時の粉砕や樹
脂との混練がやり易いという特徴がある。The permanent magnet powder obtained by recrystallizing an amorphous alloy material has a significantly smaller crystal grain size than the powder obtained by crushing an ingot as in the conventional case. Therefore, the permanent magnet powder of the present invention is a stable high coercive force permanent magnet powder as shown in Examples, and
It has excellent oxidation resistance, and is characterized in that it is easy to pulverize and knead with resin when manufacturing bonded magnets.
【００１４】本発明は、容易に、しかも安定した特性の
下で提供される永久磁石粉末よりなるボンド磁石であ
る。The present invention is a bonded magnet composed of a permanent magnet powder which is easily and stably provided.
【００１５】[0015]
【実施例】つぎに実施例について説明する。EXAMPLES Next, examples will be described.
【００１６】実施例１〜１５ 表１のＮo.１〜１５に示す各組成の合金試料を、アーク
溶解炉でアルゴンガス中で溶解し、アルゴンガス雰囲気
に置換された遠心急冷法による非晶質製造装置（銅製中
空円筒で外径２００ｍｍ、内径１８０ｍｍ、長さ６００
ｍｍ、回転速度２５００〜４０００ｒｐｍ）中に噴射
し、非晶質の粉末を得た。得られた粉末を約７００Ｔｏ
ｒｒのアルゴンガスとともに石英管中に封入し、６００
℃で１２時間熱処理し、熱処理後の粉末の磁気特性を振
動磁束計により測定した。Examples 1 to 15 Amorphous alloys prepared by the centrifugal quenching method in which alloy samples having the respective compositions shown in Nos. 1 to 15 in Table 1 were melted in an argon gas in an arc melting furnace and replaced with an argon gas atmosphere. Manufacturing equipment (a hollow copper cylinder with an outer diameter of 200 mm, an inner diameter of 180 mm, and a length of 600)
mm, rotation speed 2500-4000 rpm) to obtain an amorphous powder. The obtained powder is about 700 To
Enclose in a quartz tube together with rr argon gas,
Heat treatment was performed at 12 ° C. for 12 hours, and the magnetic properties of the powder after heat treatment were measured by an oscillating magnetometer.
【００１７】[0017]
【表１】 [Table 1]
【００１８】つぎに、この粉末をエポキシ樹脂と９８：
２の重量比で混合し、６ｔ／ｃｍ2の圧力で圧縮成形を
行い、その後熱硬化してボンド磁石を作成し、その磁気
特性を測定した。Next, this powder was mixed with an epoxy resin and 98:
The mixture was mixed at a weight ratio of 2 and compression-molded at a pressure of 6 t / cm 2 , followed by thermosetting to prepare a bonded magnet, and its magnetic characteristics were measured.
【００１９】微粉末およびボンド磁石の磁気特性を表２
に示す。The magnetic properties of the fine powder and the bonded magnet are shown in Table 2.
Shown in.
【００２０】[0020]
【表２】 [Table 2]
【００２１】表２の結果から明らかなように、実施例１
〜１５のものは微粉末として高保磁力永久磁石粉末とし
ての特性を示し、その粉末を用いたボンド磁石はすぐれ
た永久磁石特性を示す。As is clear from the results of Table 2, Example 1
Nos. 15 to 15 show characteristics as high coercive force permanent magnet powder as fine powder, and the bonded magnet using the powder shows excellent permanent magnet characteristics.
【００２２】実施例２０ （Ｆｅ0.79Ｃｏ0.04Ｚｒ0.01Ｈｆ0.01Ｂ0.15）0.87Ｎｄ
0.07Ｐｒ0.06なる組成の試料を、高周波溶解炉でアルゴ
ンガス中で溶解し、実施例１と同様の方法で非晶質のリ
ボンを得た。この非晶質リボンを石英管中にアルゴンガ
スとともに封入し、７００℃で１時間熱処理し、熱処理
後、室温で振動型磁束計によりその磁性値を測定したと
ころ、 σ＝１４９ｅｍｕ／ｇ， ｉＨｃ＝９．５ｋＯｅ を有する永久磁石特性が得られた。Example 20 (Fe 0.79 Co 0.04 Zr 0.01 Hf 0.01 B 0.15 ) 0.87 Nd
A sample having a composition of 0.07 Pr 0.06 was melted in an argon gas in a high frequency melting furnace, and an amorphous ribbon was obtained by the same method as in Example 1. This amorphous ribbon was enclosed in a quartz tube together with argon gas, heat-treated at 700 ° C. for 1 hour, and the magnetic value was measured by a vibrating magnetometer at room temperature. Σ = 149 emu / g, iHc = Permanent magnet properties with 9.5 kOe were obtained.
【００２３】つぎに、このリボンを振動ミルによりノル
マルヘキサン中で、平均粒径が約１０〜８μｍとなるよ
うに粉砕し、この粉末を１０ｔ／ｃｍ2の圧力で圧縮成
形を行い、その後真空中でエポキシ樹脂を含浸させ、熱
硬化を行いボンド磁石を作成した。その磁気特性を測定
した結果は、 Ｂｒ＝７．９ｋＧ， ｂＨｃ＝６．８ｋＯｅ， （ＢＨ）max＝１１．９ＭＧＯｅ であった。Next, this ribbon was crushed by a vibration mill in normal hexane so as to have an average particle size of about 10 to 8 μm, and this powder was compression-molded at a pressure of 10 t / cm 2 , and then in vacuum. Then, it was impregnated with an epoxy resin and heat-cured to prepare a bonded magnet. The results of measurement of the magnetic properties were Br = 7.9 kG, bHc = 6.8 kOe, (BH) max = 11.9 MGOe.
【００２４】[0024]
【発明の効果】本発明は、高保磁力を有する永久磁石粉
末を合成樹脂や非磁性金属等と混合して得られたボンド
磁石である。The present invention is a bonded magnet obtained by mixing a permanent magnet powder having a high coercive force with a synthetic resin, a non-magnetic metal or the like.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｆ 1/053 // Ｈ０１Ｆ 7/02 Ａ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area H01F 1/053 // H01F 7/02 A
Claims (4)
素（Ｍ）および希土類元素（Ｒ）からなり、これら構成
成分が下記組成式、 （Ｔ1-XＭX）ZＲ1-Z ただし０．０１≦ｘ≦０．２８ ０．３５≦ｚ≦０．８９ Ｔ：Ｆｅおよび／またはＣｏ、さらにＺｒ，Ｈｆより選
ばれる１種もしくは２種の組合せ、 Ｍ：Ｂ，Ｓｉ，Ｃより選ばれる１種もしくは２種以上の
組合せ、 Ｒ：Ｎｄおよび／またはＰｒ、さらにＬａ，Ｃｅ，Ｓ
ｍ，Ｔｂ，Ｈｏ，Ｄｙ，Ｙより選ばれる１種もしくは２
種以上の組合せ、より成り、非晶質再結晶粒径の大きさ
の結晶粒を有する高保磁力永久磁石粉末を、合成樹脂ま
たは非磁性金属で結合したことを特徴とするボンド永久
磁石。1. A constituent component comprises a transition metal (T), a metalloid element (M) and a rare earth element (R), and these constituent components have the following composition formula: (T 1-X M X ) Z R 1- Z However, 0.01 ≦ x ≦ 0.28 0.35 ≦ z ≦ 0.89 T: Fe and / or Co, and one or a combination of two or more selected from Zr and Hf, M: B, Si, C One or a combination of two or more selected from the following, R: Nd and / or Pr, and further La, Ce, S
1 or 2 selected from m, Tb, Ho, Dy, Y
A bonded permanent magnet comprising a combination of at least one kind of particles, and a high coercive force permanent magnet powder having a crystal grain size of an amorphous recrystallized grain size, which is bonded with a synthetic resin or a non-magnetic metal.
ることを特徴とする請求項１に記載のボンド永久磁石。2. The bonded permanent magnet according to claim 1, wherein the metalloid element (M) as a constituent component is B.
よび／またはＰｒであることを特徴とする、請求項１に
記載のボンド永久磁石。3. The bonded permanent magnet according to claim 1, wherein the rare earth element (R) as a constituent component is Nd and / or Pr.
り、かつ、構成成分の希土類元素（Ｒ）が、Ｎｄおよび
／またはＰｒであることを特徴とする、請求項１に記載
のボンド永久磁石。4. The semimetal element (M) as a constituent is B, and the rare earth element (R) as a constituent is Nd and / or Pr. Bond permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4290168A JPH0696925A (en) | 1992-10-28 | 1992-10-28 | Bond magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4290168A JPH0696925A (en) | 1992-10-28 | 1992-10-28 | Bond magnet |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56026075A Division JPS57141901A (en) | 1981-02-26 | 1981-02-26 | Permanent magnet powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0696925A true JPH0696925A (en) | 1994-04-08 |
Family
ID=17752634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4290168A Pending JPH0696925A (en) | 1992-10-28 | 1992-10-28 | Bond magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0696925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416903A (en) * | 2021-07-06 | 2021-09-21 | 内蒙古师范大学 | Application of alloy powder, hard magnetic material and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314611A (en) * | 1976-07-28 | 1978-02-09 | Hitachi Metals Ltd | Permanent magnetic alloy |
| JPS5629639A (en) * | 1979-08-17 | 1981-03-25 | Seiko Instr & Electronics Ltd | Amorphous rare earth magnets and producing thereof |
| JPS647501A (en) * | 1986-04-15 | 1989-01-11 | Tdk Corp | Permanent magnet and its manufacture |
| JPH0271506A (en) * | 1988-08-05 | 1990-03-12 | Mitsubishi Steel Mfg Co Ltd | Manufacture of permanent magnet powder |
-
1992
- 1992-10-28 JP JP4290168A patent/JPH0696925A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314611A (en) * | 1976-07-28 | 1978-02-09 | Hitachi Metals Ltd | Permanent magnetic alloy |
| JPS5629639A (en) * | 1979-08-17 | 1981-03-25 | Seiko Instr & Electronics Ltd | Amorphous rare earth magnets and producing thereof |
| JPS647501A (en) * | 1986-04-15 | 1989-01-11 | Tdk Corp | Permanent magnet and its manufacture |
| JPS647502A (en) * | 1986-04-15 | 1989-01-11 | Tdk Corp | Permanent magnet and its manufacture |
| JPH0271506A (en) * | 1988-08-05 | 1990-03-12 | Mitsubishi Steel Mfg Co Ltd | Manufacture of permanent magnet powder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416903A (en) * | 2021-07-06 | 2021-09-21 | 内蒙古师范大学 | Application of alloy powder, hard magnetic material and preparation method and application thereof |
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