JPH04360501A - Manufacture of rare earth magnet - Google Patents
Manufacture of rare earth magnetInfo
- Publication number
- JPH04360501A JPH04360501A JP3163843A JP16384391A JPH04360501A JP H04360501 A JPH04360501 A JP H04360501A JP 3163843 A JP3163843 A JP 3163843A JP 16384391 A JP16384391 A JP 16384391A JP H04360501 A JPH04360501 A JP H04360501A
- Authority
- JP
- Japan
- Prior art keywords
- rare earth
- magnet
- binder
- earth magnet
- material 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.)
- Pending
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 25
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000011230 binding agent Substances 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000006023 eutectic alloy Substances 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 5
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 5
- 229910052738 indium Inorganic materials 0.000 claims abstract description 5
- 229910052745 lead Inorganic materials 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 5
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 5
- 229910052718 tin Inorganic materials 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 14
- 238000007731 hot pressing Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 229910052735 hafnium Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 9
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 238000005245 sintering Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005121 nitriding Methods 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
- H01F1/04—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
- H01F1/059—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は希土類磁石の製造方法
に関し、詳しくはＲ−Ｆｅ−Ｎ系の希土類磁石の製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing rare earth magnets, and more particularly to a method for manufacturing R--Fe--N rare earth magnets.
【０００２】0002
【発明の背景】近年のエレクトロニクス産業の発達に伴
い、希土類磁石の需要は飛躍的に増大している。近年開
発されたＮｄ−Ｆｅ−Ｂ系磁石（例えば特開昭５９−４
６００８号）は、その代表的な例といえる。しかし、こ
の磁石は、キュリー温度が３１０℃と低いために、自動
車用モーターのような耐熱性を必要とする用途には、い
まだ十分に対応できないのが現状である。これに対して
昨年Ｃｏｅｙらにより発見されたＲ−Ｆｅ−Ｎ系希土類
磁石は、約４７０℃のキュリー温度を有することから、
Ｎｄ−Ｆｅ−Ｂ系磁石よりも優れた耐熱性が期待されて
いる。BACKGROUND OF THE INVENTION With the recent development of the electronics industry, the demand for rare earth magnets has increased dramatically. Recently developed Nd-Fe-B magnets (for example, JP-A-59-4
No. 6008) can be said to be a typical example. However, since the Curie temperature of this magnet is as low as 310° C., it is currently not suitable for applications that require heat resistance, such as automobile motors. On the other hand, the R-Fe-N rare earth magnet discovered by Coey et al. last year has a Curie temperature of about 470°C.
It is expected to have better heat resistance than Nd-Fe-B magnets.
【０００３】このＲ−Ｆｅ−Ｎ系化合物は、母合金Ｒ−
Ｆｅ（例えばＲ２Ｆｅ１７）を特定条件で窒化処理する
ことによって得られるが、熱安定性に関して問題があり
、特に７００℃以上の高温に長時間（たとえば１時間程
度）さらされると分解するため、焼結体を作ることが困
難であるといった問題がある。[0003] This R-Fe-N compound is a master alloy R-
It is obtained by nitriding Fe (e.g. R2Fe17) under specific conditions, but there are problems with thermal stability, and it decomposes when exposed to high temperatures of 700°C or higher for a long time (e.g. about 1 hour), so sintering is difficult. There is a problem that it is difficult to build a body.
【０００４】即ち従来の希土類磁石の場合一般に粉末を
１１００〜１２００℃程度の高温で焼結することによっ
て得られるが、このＲ−Ｆｅ−Ｎ磁石の場合、同様の方
法で焼結を行うと磁性が失われてしまう。In other words, conventional rare earth magnets are generally obtained by sintering powder at a high temperature of about 1,100 to 1,200°C, but in the case of this R-Fe-N magnet, magnetic properties can be obtained by sintering in the same manner. will be lost.
【０００５】[0005]
【課題を解決するための手段】［第一解決手段］本発明
はこのような事情を背景としてなされたものであり、そ
の要旨は、一般式ＲｘＦｅ１００−ｘ−ｙＮｙ（但しＲ
はＹを含む希土類元素、ｘ，ｙはそれぞれ原子％で５≦
ｘ≦３０，ｙ≦３０）で表される希土類磁石の製造方法
であって、該希土類磁石の原料粉にバインダーとしてＳ
ｎ，Ｚｎ，Ａｌ，Ｓｂ，Ｂｉ，Ｓｅ，Ｇａ，Ｔｅ，Ｉｎ
，Ｃｄ，Ｐｂの何れか一種又は二種以上の低融点金属を
１０重量％以下の量で添加した後ホットプレスすること
にある。[Means for Solving the Problems] [First Means for Solving] The present invention was made against the background of the above, and its gist is that the general formula RxFe100-x-yNy (where R
is a rare earth element containing Y, x and y are each atomic% 5≦
x≦30, y≦30), wherein S is added as a binder to the raw material powder of the rare earth magnet.
n, Zn, Al, Sb, Bi, Se, Ga, Te, In
, Cd, and Pb in an amount of 10% by weight or less, followed by hot pressing.
【０００６】このように本発明は上記特定の低融点金属
をバインダーとして用い、Ｒ−Ｆｅ−Ｎの原料粉末をホ
ットプレスするようにしたものである。かかる本発明に
よればＲ−Ｆｅ−Ｎを分解させることなくその粉末を所
定形状に固め、磁石とすることができる。[0006] As described above, the present invention uses the above-mentioned specific low-melting point metal as a binder and hot-presses R-Fe-N raw material powder. According to the present invention, the powder of R-Fe-N can be solidified into a predetermined shape and made into a magnet without decomposing it.
【０００７】尚その際、バインダーを添加した後原料粉
末を磁界中で配向させた後ホットプレスすると異方性磁
石を得ることができる。[0007] At this time, an anisotropic magnet can be obtained by adding a binder, orienting the raw material powder in a magnetic field, and then hot pressing.
【０００８】尚ホットプレスに際してＲ−Ｆｅ−Ｎとバ
インダーとが反応してしまうと磁気特性が損なわれる問
題を生ずる場合があるが、本発明における上記特定の金
属においては何れも極端な磁気特性の低下は認められな
い。[0008] Incidentally, if R-Fe-N reacts with the binder during hot pressing, a problem may arise in which the magnetic properties are impaired, but the specific metals mentioned above in the present invention all have extremely No decrease was observed.
【０００９】本発明においてバインダーの添加量を１０
重量％以下に限定しているのは、これを超えて添加する
と磁石特性、特にＢｒが低下することによる。In the present invention, the amount of binder added is 10
The reason why it is limited to less than % by weight is that if it is added in excess of this, the magnetic properties, especially Br, will deteriorate.
【００１０】［第二解決手段］本願の第二の解決手段は
、一般式ＲｘＦｅ１００−ｘ−ｙＮｙ（但しＲはＹを含
む希土類元素、ｘ，ｙはそれぞれ原子％で５≦ｘ≦３０
，ｙ≦３０）で表される希土類磁石の製造方法であって
、該希土類磁石の原料粉にバインダーとして低融点の希
土類−鉄系共晶合金を１０重量％以下の量で添加した後
ホットプレスすることを特徴とする。[Second solution] The second solution of the present application has the general formula RxFe100-x-yNy (where R is a rare earth element containing Y, and x and y are each 5≦x≦30 in atomic %).
, y≦30), wherein a low melting point rare earth-iron eutectic alloy is added as a binder in an amount of 10% by weight or less to the raw material powder of the rare earth magnet, and then hot-pressed. It is characterized by
【００１１】本発明は、バインダーとして前記の低融点
金属に代えてＲ−Ｆｅ系の共晶合金を用いるものである
。Ｒ−Ｆｅ系共晶合金の中には、例えばＳｍ７５Ｆｅ２
５，Ｎｄ７５Ｆｅ２５等融点が７００℃近傍の低融点の
ものがある。In the present invention, an R-Fe based eutectic alloy is used as a binder in place of the above-mentioned low melting point metal. Among R-Fe-based eutectic alloys, for example, Sm75Fe2
5, Nd75Fe25 has a low melting point of around 700°C.
【００１２】本発明はこのような共晶合金をバインダー
として用いるようにしたものであり、これによってもＲ
−Ｆｅ−Ｎを分解せしめることなく原料粉を所定形状に
固めて成るＲ−Ｆｅ−Ｎ系磁石を得ることができる。[0012] The present invention uses such a eutectic alloy as a binder, which also improves R.
An R--Fe--N magnet can be obtained by solidifying raw material powder into a predetermined shape without decomposing the -Fe--N.
【００１３】本発明においては、バインダーとして添加
する共晶合金の成分元素Ｒ，Ｆｅが何れもＲ−Ｆｅ−Ｎ
磁石の成分元素である利点がある。In the present invention, the component elements R and Fe of the eutectic alloy added as a binder are both R-Fe-N
It has the advantage of being a component element of magnets.
【００１４】従って本発明においては、バインダーとし
て添加した合金と原料粉末とが反応しても何ら問題なく
、むしろ好ましいと言える。即ちこれらが反応すること
によってバインダーの成分元素Ｒ，ＦｅをＲ−Ｆｅ−Ｎ
系磁石の組成成分として入り込ませることができる。
この場合合金と磁石の原料粉との反応によって最終的に
形成される組成が望ましい組成となるように予め原料粉
の組成を選定しておくのが良い。Therefore, in the present invention, there is no problem even if the alloy added as a binder reacts with the raw material powder, and it can be said that it is preferable. That is, by these reacting, the component elements R and Fe of the binder are converted into R-Fe-N.
It can be incorporated as a component of the system magnet. In this case, it is preferable to select the composition of the raw material powder in advance so that the final composition formed by the reaction between the alloy and the raw material powder of the magnet is a desired composition.
【００１５】［第三解決手段］本願の第三の解決手段は
、一般式ＲｘＦｅ１００−ｘ−ｙＮｙ（但しＲはＹを含
む希土類元素、ｘ，ｙはそれぞれ原子％で５≦ｘ≦３０
，ｙ≦３０）で表される希土類磁石の製造方法であって
、該希土類磁石の原料粉にバインダーとして式（Ｒ１−
ｕＦｅｕ）１００−ｖＴｖ（但しＴはＣｕ，Ａｇ，Ｓｉ
，Ｍｇ，Ｃａ，Ｔｉ，Ｚｒ，Ｈｆ，Ｓｎ，Ｚｎ，Ａｌ，
Ｓｂ，Ｂｉ，Ｓｅ，Ｇａ，Ｔｅ，Ｉｎ，Ｃｄ，Ｐｂの何
れか一種又は二種以上、ｕ，ｖはそれぞれ０．１≦ｕ≦
０．３，ｖ≦１０）で表されるものを１０重量％以下の
量で添加した後ホットプレスすることを特徴とする。[Third solution] The third solution of the present application has the general formula RxFe100-x-yNy (where R is a rare earth element containing Y, and x and y are each atomic % and 5≦x≦30
, y≦30), the method comprises adding the formula (R1-
uFeu) 100-vTv (T is Cu, Ag, Si
, Mg, Ca, Ti, Zr, Hf, Sn, Zn, Al,
Any one or more of Sb, Bi, Se, Ga, Te, In, Cd, Pb, u and v are each 0.1≦u≦
0.3, v≦10) in an amount of 10% by weight or less, followed by hot pressing.
【００１６】上記第二解決手段においてバインダーとし
て用いる共晶合金は、Ｒ−Ｆｅ−Ｎ磁石の成分元素から
成るものである点で望ましいものであるが、その融点は
望ましい融点よりも若干高めである。The eutectic alloy used as the binder in the second solution is desirable in that it consists of the constituent elements of the R-Fe-N magnet, but its melting point is slightly higher than the desired melting point. .
【００１７】これに対してＲ−Ｆｅに第三元素を添加し
てＲ−Ｆｅ−Ｔの形としたものは融点が更に低く、この
ようなものをバインダーとして用いることにより、Ｒ−
Ｆｅ−Ｎの分解を更に確実に防止しつつ磁石の原料粉を
ホットプレスにてより緻密に且つ強固に固めることがで
き、磁石特性を一層高めることができる。On the other hand, when a third element is added to R-Fe to form R-Fe-T, the melting point is even lower, and by using such a material as a binder, R-Fe-T is formed by adding a third element to R-Fe.
While the decomposition of Fe-N is more reliably prevented, the raw material powder of the magnet can be solidified more densely and firmly by hot pressing, and the magnetic properties can be further improved.
【００１８】尚第二及び第三解決手段の何れの発明にお
いても等方性の磁石はもとより、予め原料粉を磁界中で
配向させた上ホットプレスすることにより異方性磁石を
得ることが可能である。[0018] In both the second and third solutions, it is possible to obtain not only isotropic magnets but also anisotropic magnets by orienting the raw material powder in a magnetic field in advance and then hot pressing. It is.
【００１９】[0019]
【実施例】次に本発明の特徴を更に明確にすべく、以下
にその実施例を詳述する。
［実施例１］組成がＳｍ２Ｆｅ１７Ｎ２．１で与えられ
る粉末に対して表１に示す種々の低融点金属をバインダ
ーとして３重量％添加し、これを５５０℃でホットプレ
スして等方性磁石を得た。その磁石特性を測定した結果
が同表に併せて示してある。EXAMPLES Next, in order to further clarify the characteristics of the present invention, examples thereof will be described in detail below. [Example 1] 3% by weight of various low melting point metals shown in Table 1 were added as a binder to a powder having the composition Sm2Fe17N2.1, and this was hot pressed at 550°C to obtain an isotropic magnet. Ta. The results of measuring the magnetic properties are also shown in the same table.
【００２０】[0020]
【表１】[Table 1]
【００２１】［実施例２］組成がＳｍ２Ｆｅ１７Ｎ２．
１で与えられる原料粉に対して組成がＳｍ７５Ｆｅ２５
で与えられる共晶合金を１０重量％以下の各量で添加し
たものを７００℃でホットプレスし、磁石を得た。その
磁石特性が表２に示してある。[Example 2] The composition is Sm2Fe17N2.
The composition is Sm75Fe25 for the raw material powder given in 1.
A magnet was obtained by hot pressing at 700°C to which each of the eutectic alloys given by 10% by weight or less was added. The magnetic properties are shown in Table 2.
【００２２】[0022]
【表２】[Table 2]
【００２３】この実験では添加量３重量％で最も良い結
果が得られており、添加量がそれより少なくてもまた多
くても特性が低下している。これは３重量％添加の場合
に望ましい磁石組成が形成されることによるものと考え
られる。In this experiment, the best results were obtained when the amount added was 3% by weight, and the characteristics deteriorated even if the amount added was smaller or larger. This is considered to be because a desirable magnet composition is formed when 3% by weight is added.
【００２４】［実施例３］組成がＳｍ２Ｆｅ１７Ｎ２．
１で与えられる原料粉に、組成が（Ｓｍ０．７５Ｆｅ０
．２５）１００−ｘＴｘで与えられる低融点合金を３重
量％で添加した上５５０℃でホットプレスし、等方性磁
石を得た。その磁石特性を測定したところ表３の如くで
あった。尚ＴはＳｍ７５Ｆｅ２５共晶合金の共晶温度を
低下させる元素であり、ここではその量ｘをｘ＝１０と
した。[Example 3] The composition is Sm2Fe17N2.
The composition of the raw material powder given in 1 is (Sm0.75Fe0
．． 25) A low melting point alloy given by 100-xTx was added at 3% by weight and hot pressed at 550°C to obtain an isotropic magnet. The magnetic properties were measured and were as shown in Table 3. Note that T is an element that lowers the eutectic temperature of the Sm75Fe25 eutectic alloy, and here the amount x thereof was set to x=10.
【００２５】[0025]
【表３】[Table 3]
【００２６】［実施例４］以上の例は等方性磁石を製造
する場合の例であるが、粉末を磁界方向に配向させた後
にホットプレスすることにより、更に高い磁性が得られ
る。本実施例４では上記実施例１のバインダーを添加し
た粉末を磁界中で配向させた後ホットプレスを行って異
方性磁石を得た。その磁石特性が表４に示してある。[Example 4] The above example is an example of manufacturing an isotropic magnet, but even higher magnetism can be obtained by hot pressing after orienting the powder in the direction of the magnetic field. In Example 4, the binder-added powder of Example 1 was oriented in a magnetic field and then hot pressed to obtain an anisotropic magnet. The magnetic properties are shown in Table 4.
【００２７】[0027]
【表４】[Table 4]
【００２８】以上本発明の実施例を詳述したがこれはあ
くまで一例示であり、本発明はその主旨を逸脱しない範
囲において、当業者の知識に基づき様々な変更を加えた
態様で実施可能である。Although the embodiments of the present invention have been described in detail above, this is merely an example, and the present invention can be implemented with various modifications based on the knowledge of those skilled in the art without departing from the spirit thereof. be.
Claims (3)
但しＲはＹを含む希土類元素、ｘ，ｙはそれぞれ原子％
で５≦ｘ≦３０，ｙ≦３０）で表される希土類磁石の製
造方法であって、該希土類磁石の原料粉にバインダーと
してＳｎ，Ｚｎ，Ａｌ，Ｓｂ，Ｂｉ，Ｓｅ，Ｇａ，Ｔｅ
，Ｉｎ，Ｃｄ，Ｐｂの何れか一種又は二種以上の低融点
金属を１０重量％以下の量で添加した後ホットプレスす
ることを特徴とする希土類磁石の製造方法。Claim 1: General formula RxFe100-x-yNy (
However, R is a rare earth element including Y, and x and y are each atomic%.
5≦x≦30, y≦30), the manufacturing method includes adding Sn, Zn, Al, Sb, Bi, Se, Ga, Te as a binder to the raw material powder of the rare earth magnet.
, In, Cd, and Pb, in an amount of 10% by weight or less, followed by hot pressing.
但しＲはＹを含む希土類元素、ｘ，ｙはそれぞれ原子％
で５≦ｘ≦３０，ｙ≦３０）で表される希土類磁石の製
造方法であって、該希土類磁石の原料粉にバインダーと
して低融点の希土類−鉄系共晶合金を１０重量％以下の
量で添加した後ホットプレスすることを特徴とする希土
類磁石の製造方法。Claim 2: General formula RxFe100-x-yNy (
However, R is a rare earth element including Y, and x and y are each atomic%.
5≦x≦30, y≦30) A method for manufacturing a rare earth magnet represented by 5≦x≦30, y≦30), wherein a low melting point rare earth-iron eutectic alloy is added as a binder to raw material powder of the rare earth magnet in an amount of 10% by weight or less. A method for producing a rare earth magnet, which comprises hot-pressing the magnet.
但しＲはＹを含む希土類元素、ｘ，ｙはそれぞれ原子％
で５≦ｘ≦３０，ｙ≦３０）で表される希土類磁石の製
造方法であって、該希土類磁石の原料粉にバインダーと
して式（Ｒ１−ｕＦｅｕ）１００−ｖＴｖ（但しＴはＣ
ｕ，Ａｇ，Ｓｉ，Ｍｇ，Ｃａ，Ｔｉ，Ｚｒ，Ｈｆ，Ｓｎ
，Ｚｎ，Ａｌ，Ｓｂ，Ｂｉ，Ｓｅ，Ｇａ，Ｔｅ，Ｉｎ，
Ｃｄ，Ｐｂの何れか一種又は二種以上、ｕ，ｖはそれぞ
れ０．１≦ｕ≦０．３，ｖ≦１０）で表されるものを１
０重量％以下の量で添加した後ホットプレスすることを
特徴とする希土類磁石の製造方法。Claim 3: General formula RxFe100-x-yNy (
However, R is a rare earth element including Y, and x and y are each atomic%.
5≦x≦30, y≦30), the manufacturing method of a rare earth magnet represented by formula (R1-uFeu)100-vTv (where T is C
u, Ag, Si, Mg, Ca, Ti, Zr, Hf, Sn
, Zn, Al, Sb, Bi, Se, Ga, Te, In,
One or more of Cd, Pb, u, v are 0.1≦u≦0.3, v≦10), respectively.
A method for producing a rare earth magnet, which comprises hot pressing after adding the rare earth magnet in an amount of 0% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3163843A JPH04360501A (en) | 1991-06-07 | 1991-06-07 | Manufacture of rare earth magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3163843A JPH04360501A (en) | 1991-06-07 | 1991-06-07 | Manufacture of rare earth magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04360501A true JPH04360501A (en) | 1992-12-14 |
Family
ID=15781808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3163843A Pending JPH04360501A (en) | 1991-06-07 | 1991-06-07 | Manufacture of rare earth magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04360501A (en) |
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|---|---|---|---|---|
| EP0670578A1 (en) * | 1994-03-02 | 1995-09-06 | Alcatel | Process for manufacturing a magnetic material in solid form from an intermetallic powder of the Sm2 Fe17 N3-X type |
| KR20000014040A (en) * | 1998-08-17 | 2000-03-06 | 밍 루 | method FOR MANUFACTURING RARE-EARTH PERMANENT MAGNET |
| KR100446453B1 (en) * | 2001-08-30 | 2004-09-01 | 대한민국(충남대학교) | FABRICATION METHOD OF ANISOTROPIC NdFeB PERMANENT MAGNET |
| WO2015199096A1 (en) * | 2014-06-24 | 2015-12-30 | 日産自動車株式会社 | Method for manufacturing rare earth magnetic mold |
| JP2017010960A (en) * | 2015-06-16 | 2017-01-12 | 日産自動車株式会社 | SmFeN BASED METAL BOND MAGNET COMPACT WITH LARGE SPECIFIC RESISTANCE |
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| WO2018163967A1 (en) * | 2017-03-10 | 2018-09-13 | 国立研究開発法人産業技術総合研究所 | Magnetic powder containing sm-fe-n crystal grains, sintered magnet produced from same, method for producing said magnetic powder, and method for producing said sintered magnet |
-
1991
- 1991-06-07 JP JP3163843A patent/JPH04360501A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2717002A1 (en) * | 1994-03-02 | 1995-09-08 | Alsthom Cge Alcatel | Process for the preparation of a magnetic material in solid form from an Fe2 Fe17 N3-x type intermetallic nitride powder |
| US5573603A (en) * | 1994-03-02 | 1996-11-12 | Alcatel Alsthom Compagnie Generale D'electricite | Method of making a solid magnetic material from Sm2 Fe17 N3-X type intermetallic nitride powder |
| EP0670578A1 (en) * | 1994-03-02 | 1995-09-06 | Alcatel | Process for manufacturing a magnetic material in solid form from an intermetallic powder of the Sm2 Fe17 N3-X type |
| KR20000014040A (en) * | 1998-08-17 | 2000-03-06 | 밍 루 | method FOR MANUFACTURING RARE-EARTH PERMANENT MAGNET |
| KR100446453B1 (en) * | 2001-08-30 | 2004-09-01 | 대한민국(충남대학교) | FABRICATION METHOD OF ANISOTROPIC NdFeB PERMANENT MAGNET |
| JPWO2015199096A1 (en) * | 2014-06-24 | 2017-04-20 | 日産自動車株式会社 | Method for producing rare earth magnet compact |
| WO2015199096A1 (en) * | 2014-06-24 | 2015-12-30 | 日産自動車株式会社 | Method for manufacturing rare earth magnetic mold |
| WO2015198396A1 (en) * | 2014-06-24 | 2015-12-30 | 日産自動車株式会社 | Method for manufacturing molded rare earth magnet |
| JP2017010960A (en) * | 2015-06-16 | 2017-01-12 | 日産自動車株式会社 | SmFeN BASED METAL BOND MAGNET COMPACT WITH LARGE SPECIFIC RESISTANCE |
| CN106384639A (en) * | 2016-10-28 | 2017-02-08 | 北京科技大学 | Preparation method for high-performance bonded neodymium iron boron permanent magnet material |
| CN106384639B (en) * | 2016-10-28 | 2018-04-03 | 北京科技大学 | A kind of preparation method of high-performance binding Nd-Fe-B permanent magnetic material |
| WO2018163967A1 (en) * | 2017-03-10 | 2018-09-13 | 国立研究開発法人産業技術総合研究所 | Magnetic powder containing sm-fe-n crystal grains, sintered magnet produced from same, method for producing said magnetic powder, and method for producing said sintered magnet |
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