JPH05226130A - Manufacture of smfen magnet powder - Google Patents
Manufacture of smfen magnet powderInfo
- Publication number
- JPH05226130A JPH05226130A JP4057111A JP5711192A JPH05226130A JP H05226130 A JPH05226130 A JP H05226130A JP 4057111 A JP4057111 A JP 4057111A JP 5711192 A JP5711192 A JP 5711192A JP H05226130 A JPH05226130 A JP H05226130A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- smfen
- producing
- magnet powder
- phase
- 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.)
- Withdrawn
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
- H01F1/059—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2
- H01F1/0596—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2 of rhombic or rhombohedral Th2Zn17 structure or hexagonal Th2Ni17 structure
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ボンド磁石の製造に
適した高い磁気特性をもつＳｍＦｅＮ系合金粉末を安価
に製造する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inexpensively producing an SmFeN alloy powder having high magnetic characteristics suitable for producing a bonded magnet.
【０００２】[0002]
【従来の技術】一般に、Ｓｍ2 Ｆｅ17Ｎx （Ｘ＝１〜
３）化合物は、永久磁石材料として優れた磁気的特性を
もつため、すでにこの化合物を主体組織とする磁粉を樹
脂や低融点金属・合金で結合したボンド磁石の開発が進
められてる。 2. Description of the Related Art Generally, Sm 2 Fe 17 N x (X = 1 to
3) Since the compound has excellent magnetic properties as a permanent magnet material, development of a bonded magnet in which magnetic powder mainly composed of this compound is bonded with a resin or a low melting point metal / alloy is underway.
【０００３】上記Ｓｍ2 Ｆｅ17Ｎx （Ｘ＝１〜３）化合
物を主体とする高い保磁力をもつ等方性磁粉は、まず、
原料粉末として、Ｓｍ粉末および純Ｆｅ粉末を混合して
混合粉末を作製し、この混合粉末を遊星ボールミルやア
トライターボールミルなどの高エネルギー粉砕機を用い
て高エネルギーを与えながら粉砕・混合することにより
ＳｍとＦｅ合金化すると同時に非晶質を主体とするＳｍ
Ｆｅ合金粉末を製造し（上記高エネルギー粉砕機を用い
て混合粉末を合金化する方法は、例えば、機械的合金化
法、メカニカルアロイング法などとして一般に知られて
いる）、この非晶質を主体とするＳｍＦｅ合金粉末を結
晶化して微結晶Ｓｍ2 Ｆｅ17相を主体組織とする粉末を
つくり、この粉末をＮ2 を主体とする雰囲気中に保持し
ながら窒化処理を施して微結晶Ｓｍ2 Ｆｅ17Ｎx 相（Ｘ
＝１〜３）を主体組織とするＳｍＦｅＮ系磁石粉末とす
ることにより製造されていた。The isotropic magnetic powder mainly composed of the Sm 2 Fe 17 N x (X = 1 to 3) compound and having a high coercive force is as follows.
As raw material powder, Sm powder and pure Fe powder are mixed to prepare a mixed powder, and the mixed powder is pulverized and mixed while applying high energy using a high energy pulverizer such as a planetary ball mill or an attritor ball mill. Sm mainly composed of amorphous at the same time as Fe alloy with Sm
The Fe alloy powder is produced (a method of alloying the mixed powder using the above-mentioned high energy pulverizer is generally known as a mechanical alloying method, a mechanical alloying method, etc.) and The SmFe alloy powder containing the main component is crystallized to form a powder containing the microcrystalline Sm 2 Fe 17 phase as the main structure, and the powder is subjected to a nitriding treatment while being held in an atmosphere containing N 2 as the main component to form the microcrystalline Sm 2 Fe 17 N x phase (X
= 1 to 3) as the main structure of the SmFeN magnet powder.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来のＳｍＦｅＮ系磁石粉末を製造する方法では、（１）
原料粉末として高価なＳｍ粉末を用いるためにコスト
高となる、（２） 高エネルギー粉砕・混合処理工程で
Ｓｍの酸化が著しく、このため出発組成のＳｍ／Ｆｅの
モル比が、高い残留磁束密度が得られるＳｍ2 Ｆｅ17Ｎ
x化合物の化学量論の近く２／１７〜３／１７の組成範
囲では、α−Ｆｅが析出して大きな保磁力が得られな
い、などの課題があり、従来の製造方法で製造されたＳ
ｍＦｅＮ系磁石粉末は、高価格である割にはボンド磁石
製造用磁石粉末として十分なものではなかった。However, in the above-mentioned conventional method for producing SmFeN magnet powder, (1)
Since expensive Sm powder is used as the raw material powder, the cost becomes high. (2) Sm oxidation is remarkable in the high energy pulverizing / mixing process step, and therefore the Sm / Fe molar ratio of the starting composition is high. To obtain Sm 2 Fe 17 N
In the composition range of 2/17 to 3/17, which is close to the stoichiometry of the x compound, there is a problem that α-Fe precipitates and a large coercive force cannot be obtained, and S produced by the conventional production method has a problem.
Although the mFeN-based magnet powder is expensive, it was not sufficient as a magnet powder for producing a bonded magnet.
【０００５】[0005]
【課題を解決するための手段】そこで、本発明者等は、
高い残留磁束密度が得られるＳｍ2 Ｆｅ17Ｎx 化合物の
化学量論の近くの組成（具体的には、Ｓｍ／Ｆｅのモル
比が２／１７〜３／１７の組成）を有しα−Ｆｅの析出
の少ない高保磁力を有するＳｍＦｅＮ系磁石粉末を、従
来よりも安価に製造すべく研究を行った結果、原料粉末
としてＳｍ粉末よりも格段に安いＳｍ2 Ｏ3 粉末を用
い、このＳｍ2Ｏ3 粉末をＣａおよびＦｅ粉末と共に配
合し、高エネルギー粉砕機を用いて高エネルギーを与え
ながら粉砕・混合し、上記粉砕・混合中にＳｍ2 Ｏ3 を
Ｃａで還元すると同時に還元されたＳｍとＦｅを合金化
せしめて非晶質を主体とするＳｍＦｅ合金粉末を製造
し、未反応のＣａおよび還元反応生成物であるＣａＯを
水洗により除去し、乾燥したのち、従来法と同様に結晶
化熱処理し、さらに上記結晶化熱処理して得られた微細
結晶化Ｓｍ2 Ｆｅ17化合物を窒化処理すると、Ｓｍ2Ｆ
ｅ17Ｎx 相（Ｘ＝１〜３）を主体とするＳｍＦｅＮ系磁
石粉末を製造することができるとう知見を得たのであ
る。Therefore, the present inventors have
The composition has a composition close to the stoichiometry of the Sm 2 Fe 17 N x compound (specifically, a composition having a Sm / Fe molar ratio of 2/17 to 3/17) capable of obtaining a high residual magnetic flux density, and α- the SmFeN-based magnetic powder having a small coercive force of Fe precipitation, as a result of studies to inexpensively manufactured than conventional, using a much cheaper Sm 2 O 3 powder than Sm powder as raw material powder, the Sm 2 O 3 powder was blended with Ca and Fe powders, pulverized and mixed with a high energy pulverizer while giving high energy, and Sm 2 O 3 was reduced by Ca during the pulverization and mixing, and at the same time reduced Sm and SmFe alloy powder mainly composed of amorphous is produced by alloying Fe, unreacted Ca and reduction reaction product CaO are removed by washing with water, and dried, followed by crystallization heat treatment as in the conventional method. And above When nitriding the obtained fine crystallized Sm 2 Fe 17 compound crystallized heat treatment, Sm 2 F
It was found that the SmFeN magnet powder mainly composed of the e 17 N x phase (X = 1 to 3) can be produced.
【０００６】この発明は、かかる知見にもとづいてなさ
れたものであって、Ｓｍ2 Ｏ3 粉末、純Ｆｅ粉末、およ
びＣａをモル比で、Ｓｍ2 Ｏ3 ／Ｆｅ：１／１７〜１．
５／１７、Ｃａ／Ｓｍ2 Ｏ3 ：３．３以上となるような
割合に配合して配合粉末を作製する工程、この配合粉末
に、高エネルギー粉砕機を用いて高エネルギーを与えな
がら粉砕・混合処理を施して、Ｓｍ2 Ｏ3 の還元および
ＳｍとＦｅの合金化を行うと同時に非晶質を主体とする
ＳｍＦｅ合金粉末を製造する工程、上記ＳｍＦｅ合金粉
末を水洗して未反応Ｃａおよび還元反応生成物ＣａＯを
除去する工程、上記水洗したＳｍＦｅ合金粉末を乾燥
し、結晶化熱処理を施して、微結晶Ｓｍ2 Ｆｅ17相を主
体組織とする粉末を製造する工程、この粉末にＮ2 を主
体とする雰囲気中で熱処理する窒化処理を施して、六方
晶Ｓｍ2 Ｆｅ17Ｎx 相（Ｘ＝１〜３）を主体組織とする
ＳｍＦｅＮ系磁石粉末を製造する工程、の各工程からな
るＳｍＦｅＮ系磁石粉末の製造方法に特徴を有するもの
である。The present invention has been made on the basis of the above-mentioned findings. The Sm 2 O 3 powder, the pure Fe powder, and the Ca in a molar ratio of Sm 2 O 3 / Fe: 1/17 to 1.
5/17, Ca / Sm 2 O 3 : A step of preparing a compounded powder by mixing it in a ratio such that it is 3.3 or more, and pulverizing the compounded powder while applying high energy using a high energy pulverizer. A step of performing a mixing treatment to reduce Sm 2 O 3 and alloy Sm and Fe, and at the same time, to produce an SmFe alloy powder mainly composed of an amorphous material; washing the SmFe alloy powder with water to obtain unreacted Ca and A step of removing the reduction reaction product CaO, a step of drying the above-mentioned washed SmFe alloy powder and subjecting it to a crystallization heat treatment to produce a powder having a microcrystalline Sm 2 Fe 17 phase as a main structure, and adding N 2 to this powder. A step of producing a SmFeN-based magnet powder having a hexagonal Sm 2 Fe 17 N x phase (X = 1 to 3) as a main structure by performing a nitriding treatment in an atmosphere mainly composed of SmFeN magnet powder It is characterized by the manufacturing method of powder.
【０００７】この発明で用いるＳｍ2 Ｏ3 粉末とＣａを
配合し、高エネルギー粉砕機を用いて粉砕・混合する
と、粉砕・混合中に Ｓｍ2 Ｏ3 ＋３Ｃａ＝２Ｓｍ＋３ＣａＯ なる反応が生じてＳｍ2 Ｏ3 は還元されＳｍとなり、Ｓ
ｍはＦｅと合金化して非結晶を主体とするＳｍＦｅ合金
粉末が生成される。When the Sm 2 O 3 powder used in the present invention and Ca are blended and pulverized and mixed by using a high energy pulverizer, a reaction of Sm 2 O 3 + 3Ca = 2Sm + 3CaO occurs during the pulverization and mixing, resulting in Sm 2 O. 3 is reduced to Sm, S
m is alloyed with Fe to produce SmFe alloy powder mainly composed of amorphous.
【０００８】一方、Ｃａは酸化されてＣａＯとなり、未
反応のＣａおよび酸化されて生成したＣａＯは、簡単に
水洗除去することができる。On the other hand, Ca is oxidized to CaO, and unreacted Ca and oxidized CaO can be easily removed by washing with water.
【０００９】さらに、この発明において、原料粉末のＳ
ｍ2 Ｏ3 粉末、Ｆｅ粉末およびＣａをモル比でＳｍ2 Ｏ
3 ／Ｆｅ：１／１７〜１．５／１７、Ｃａ／Ｓｍ
2 Ｏ3 ：３．３以上となるような割合に配合したのは、
Ｓｍ2 Ｏ3 ／Ｆｅが１／１７未満ではα−Ｆｅの生成が
防ぎ難く磁石粉末の保磁力が減少するので好ましくな
く、一方、Ｓｍ2 Ｏ3 ／Ｆｅが１．５／１７を越えると
飽和磁化の値の小さなＳｍに富む不純物相が多く形成さ
れるため磁石粉末の残留磁束密度が減少するので好まし
くない理由によるものであり、また、Ｃａ／Ｓｍ2 Ｏ3
が３．３未満ではＣａが原料のＳｍ2 Ｏ3 の還元のみに
ほぼ消費され、高エネルギー粉砕・混合工程でのＳｍの
酸化をＣａによって防ぐことができず、このためα−Ｆ
ｅの生成を招き磁石粉末の保磁力が減少するので好まし
くない理由によるものである。Further, in the present invention, the raw material powder S
m 2 O 3 powder, Fe powder and Ca in a molar ratio of Sm 2 O
3 / Fe: 1/17 to 1.5 / 17, Ca / Sm
The proportion of 2 O 3 : 3.3 or more is
When Sm 2 O 3 / Fe is less than 1/17, it is not preferable because the formation of α-Fe is difficult to prevent and the coercive force of the magnet powder is reduced, while when Sm 2 O 3 / Fe exceeds 1.5 / 17, it is saturated. This is because the residual magnetic flux density of the magnet powder is reduced because a large amount of Sm-rich impurity phase having a small magnetization value is formed, which is not preferable, and Ca / Sm 2 O 3
Is less than 3.3, Ca is almost consumed only for the reduction of the raw material Sm 2 O 3 , and the oxidation of Sm in the high energy pulverization / mixing step cannot be prevented by Ca. Therefore, α-F
The reason for this is that the coercive force of the magnet powder decreases due to the generation of e, which is not preferable.
【００１０】なお、Ｃａ／Ｓｍ2 Ｏ3 が５を越えるとＳ
ｍとＦｅとの均一な粉砕・混合を阻害する傾向があるこ
と、また後の水洗工程で余剰のＣａの除去に長時間を要
するところから、５以下であることが一層好ましい。When Ca / Sm 2 O 3 exceeds 5, S
It is more preferably 5 or less because it tends to hinder the uniform pulverization and mixing of m and Fe, and it takes a long time to remove excess Ca in the subsequent water washing step.
【００１１】[0011]
【実施例】つぎに、この発明を実施例にもとづいて具体
的に説明する。EXAMPLES Next, the present invention will be specifically described based on Examples.
【００１２】原料粉末として、平均粒径：１．２μｍの
Ｓｍ2 Ｏ3 粉末、平均粒径：１５μｍのＦｅ粉末および
粒径：２．５mm以下のＣａを用意し、これら原料粉末を
表１に示される配合組成となるように配合し、得られた
配合粉末を直径：１１mmのステンレスボール１１個とと
もに容積：８０cm3 のステンレス製容器を備えた遊星ボ
ールミルの上記容器に装入し、容器内をＡｒガス雰囲気
として、容器公転速度：３００r.p.m で１５時間回転す
ることにより高エネルギー粉砕・混合処理を施し、上記
高エネルギー粉砕・混合処理して得られた粉末を水洗し
てＣａＯと未反応のＣａを除去し、ついでアセトンで水
を置換して乾燥し、さらにこの乾燥した粉末をＡｒ雰囲
気中、温度：７００℃、３０分間保持することにより結
晶化処理を行った。As raw material powders, Sm 2 O 3 powder having an average particle diameter of 1.2 μm, Fe powder having an average particle diameter of 15 μm and Ca having a particle diameter of 2.5 mm or less are prepared. The mixture powder was blended so as to have the blending composition shown, and the resulting blended powder was loaded into 11 pieces of stainless steel balls having a diameter of 11 mm and the above-mentioned container of a planetary ball mill equipped with a stainless steel container having a volume of 80 cm 3 , and the inside of the container was filled. High-energy pulverization / mixing treatment was performed by rotating the vessel in an Ar gas atmosphere at a container revolution speed of 300 rpm for 15 hours, and the powder obtained by the high-energy pulverization / mixing treatment was washed with water to react with CaO. Crystallization was performed by removing Ca, then replacing water with acetone and drying, and further maintaining the dried powder in an Ar atmosphere at a temperature of 700 ° C. for 30 minutes.
【００１３】上記結晶化処理された粉末をさらにＮ2 気
流中、温度：４５０℃、５時間保持の窒化処理し、微細
結晶のＳｍ2 Ｆｅ17Ｎx 相を主相とするＳｍＦｅＮ系磁
石粉末を製造する本発明法１〜３および比較法１〜３を
実施した。The crystallized powder is further nitrided in a N 2 gas stream at a temperature of 450 ° C. for 5 hours to obtain Sm 2 Fe 17 N x phase fine crystalline SmFeN magnet powder. Inventive methods 1 to 3 and comparative methods 1 to 3 were carried out.
【００１４】なお、比較法１〜３は、この発明の条件か
ら外れており、この外れた値に＊印を付して示してあ
る。The comparative methods 1 to 3 deviate from the conditions of the present invention, and the deviated values are indicated by * marks.
【００１５】さらに比較のために、粒径：３００μｍ以
下のＳｍ粉末を用意し、上記Ｓｍ粉末をＦｅ粉末とＳｍ
／Ｆｅ＝２．５／１７となるように配合し、得られた配
合粉末を直径：１１mmのステンレス製ボール１１個とと
もに容積：８０cm3 のステンレス製容器を備えた遊星ボ
ールミルの上記容器に装入し、容器内をＡｒガス雰囲気
として、容器公転速度：３００r.p.m で１５時間回転す
ることにより高エネルギー粉砕・混合処理を施し、さら
にＡｒ雰囲気中、温度：７００℃、３０分保持の結晶化
処理およびＮ2 気流中、温度：４５０℃、５時間保持の
窒化処理を施すことにより、微細結晶のＳｍ2 Ｆｅ17Ｎ
x 相と主相とするＳｍＦｅＮ系磁石粉末を製造する従来
法１を実施した。Further, for comparison, Sm powder having a particle size of 300 μm or less was prepared, and the Sm powder was replaced with Fe powder and Sm.
/ Fe = 2.5 / 17, and the resulting blended powder is loaded into the above-mentioned container of a planetary ball mill equipped with a stainless steel container having a volume of 80 cm 3 together with 11 stainless steel balls having a diameter of 11 mm. High-energy pulverization / mixing treatment is performed by rotating the container in an Ar gas atmosphere at a container revolution speed of 300 rpm for 15 hours, and further crystallization treatment in an Ar atmosphere at a temperature of 700 ° C for 30 minutes. And nitriding treatment in a N 2 stream at a temperature of 450 ° C. for 5 hours to obtain fine crystalline Sm 2 Fe 17 N
Conventional method 1 for producing SmFeN magnet powder having the x phase and the main phase was carried out.
【００１６】上記本発明法１〜３、比較法１〜３および
従来法１により製造されたＳｍＦｅＮ系磁石粉末にエポ
キシ樹脂：２重量％を加えてアセトン中で混練し、真空
乾燥によりアセトンを蒸発せしめ、ついで圧力：６ton
／cm2 でプレス成形して、１０mm立法の寸法を有するプ
レス成形体を作製した。Epoxy resin: 2% by weight was added to the SmFeN magnet powder produced by the above-mentioned Inventive Methods 1-3, Comparative Methods 1-3 and Conventional Method 1 and kneaded in acetone, and the acetone was evaporated by vacuum drying. Then pressure: 6 ton
/ Cm 2 was press-molded to prepare a press-molded body having a cubic dimension of 10 mm.
【００１７】上記プレス成形体を、Ｎ2 気流中、温度：
１５０℃に２時間保持することにより樹脂硬化処理して
ボンド磁石を製造し、このボンド磁石の磁気特性を測定
し、その測定結果を表１に示した。[0017] The above press-molded body, N 2 in a stream, temperature:
The resin was cured at 150 ° C. for 2 hours to produce a bonded magnet, and the magnetic characteristics of this bonded magnet were measured. The measurement results are shown in Table 1.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【発明の効果】表１に示される結果から、この発明のＳ
ｍ2 Ｏ3 粉末、ＣａおよびＦｅ粉末を原料粉末とするＳ
ｍＦｅＮ系磁石粉末の製造方法は、水洗工程および乾燥
工程が付加されて従来のＳｍ粉末およびＦｅ粉末を原料
粉末とするＳｍＦｅＮ系磁石粉末の製造方法よりも繁雑
になるものの、得られた粉末はボンド磁石製造用磁石粉
末として優れた特性を示し、さらにＳｍ2 Ｏ3 粉末はＳ
ｍ粉末に比べて価格が格段に安いところから、原料粉末
としてＳｍ2 Ｏ3 粉末を使用するこの発明は従来よりも
低コストのＳｍＦｅＮ系磁石粉末を提供することがで
き、産業上すぐれた効果を奏するものである。From the results shown in Table 1, S of the present invention
S using m 2 O 3 powder, Ca and Fe powder as raw material powder
The method for producing mFeN-based magnet powder is more complicated than the conventional method for producing SmFeN-based magnetic powder using Sm powder and Fe powder as raw material powders by adding a washing step and a drying step, but the obtained powder is bonded. It has excellent properties as a magnet powder for magnet manufacturing, and Sm 2 O 3 powder is S
Since the price is much lower than that of m powder, the present invention that uses Sm 2 O 3 powder as a raw material powder can provide SmFeN-based magnet powder at a lower cost than conventional ones, and has an excellent industrial effect. It plays.
Claims (1)
ｍ2 Ｏ3 の還元剤としてのＣａを、モル比で、 Ｓｍ2 Ｏ3 ／Ｆｅ：１／１７〜１．５／１７、 Ｃａ／Ｓｍ2 Ｏ3 ：３．３以上、 となるような割合に配合して配合粉末を作製する工程、 この配合粉末を高エネルギー粉砕機に入れて高エネルギ
ーを与えながら粉砕・混合処理を施すことにより、Ｓｍ
2 Ｏ3 を還元すると同時に還元して得られたＳｍとＦｅ
と合金化し、非晶質を主体とするＳｍＦｅ合金粉末を製
造する工程、上記ＳｍＦｅ合金粉末を水洗して未反応の
Ｃａおよび還元反応生成物ＣａＯを除去する工程、 上記水洗したＳｍＦｅ合金粉末を乾燥し、結晶化熱処理
を施して、微結晶Ｓｍ2 Ｆｅ17相を主体組織とする粉末
を製造する工程、 この粉末にＮ2 を主体とする雰囲気中で熱処理する窒化
処理を施して、六方晶Ｓｍ2 Ｆｅ17Ｎx 相（Ｘ＝１〜
３）を主体組織とするＳｍＦｅＮ系磁石粉末を製造する
工程、からなることを特徴とするＳｍＦｅＮ系磁石粉末
の製造方法。1. Sm 2 O 3 powder, pure Fe powder, and S
A ratio such that Ca as a reducing agent for m 2 O 3 has a molar ratio of Sm 2 O 3 / Fe: 1/17 to 1.5 / 17, Ca / Sm 2 O 3 : 3.3 or more. Sm is prepared by blending with the above to prepare a blended powder, and by putting this blended powder into a high-energy pulverizer and pulverizing and mixing while applying high energy,
Sm and Fe obtained by reducing 2 O 3 and at the same time
And a step of producing SmFe alloy powder mainly composed of amorphous material, a step of washing the SmFe alloy powder with water to remove unreacted Ca and a reduction reaction product CaO, and a step of drying the washed SmFe alloy powder. Then, a crystallization heat treatment is performed to produce a powder having a microcrystalline Sm 2 Fe 17 phase as a main structure. This powder is subjected to a nitriding treatment by heat treatment in an atmosphere mainly containing N 2 to obtain a hexagonal Sm 2 Fe 17 N x phase (X = 1 to 1
3) A step of producing SmFeN-based magnet powder having a main structure of 3), and a method for producing SmFeN-based magnet powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4057111A JPH05226130A (en) | 1992-02-07 | 1992-02-07 | Manufacture of smfen magnet powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4057111A JPH05226130A (en) | 1992-02-07 | 1992-02-07 | Manufacture of smfen magnet powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05226130A true JPH05226130A (en) | 1993-09-03 |
Family
ID=13046416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4057111A Withdrawn JPH05226130A (en) | 1992-02-07 | 1992-02-07 | Manufacture of smfen magnet powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05226130A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4966447B2 (en) * | 1998-05-15 | 2012-07-04 | アドバンスド ナノ テクノロジーズ プロプライエタリー リミテッド | Method for producing ultrafine powder |
| CN103785847A (en) * | 2014-02-26 | 2014-05-14 | 江门市新会区宇宏科技有限责任公司 | Method for preparing 1:12 type Nd-Fe(M)-N permanent magnet alloy powder through reduction diffusion method |
| CN106960712A (en) * | 2017-04-10 | 2017-07-18 | 华北理工大学 | A kind of method that metastable state samarium ferroalloy nitrogenizes crystallization |
| CN108994311A (en) * | 2018-08-02 | 2018-12-14 | 兰州大学 | A kind of method of solid salt mist projection granulating and reduction-diffusion process preparation anisotropy high-performance samarium iron nitrogen permanent magnetic alloy powder |
| CN110117752A (en) * | 2019-06-24 | 2019-08-13 | 江西理工大学 | A method of preparing samarium ferroalloy |
-
1992
- 1992-02-07 JP JP4057111A patent/JPH05226130A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4966447B2 (en) * | 1998-05-15 | 2012-07-04 | アドバンスド ナノ テクノロジーズ プロプライエタリー リミテッド | Method for producing ultrafine powder |
| CN103785847A (en) * | 2014-02-26 | 2014-05-14 | 江门市新会区宇宏科技有限责任公司 | Method for preparing 1:12 type Nd-Fe(M)-N permanent magnet alloy powder through reduction diffusion method |
| CN106960712A (en) * | 2017-04-10 | 2017-07-18 | 华北理工大学 | A kind of method that metastable state samarium ferroalloy nitrogenizes crystallization |
| CN106960712B (en) * | 2017-04-10 | 2018-10-02 | 华北理工大学 | A kind of method of metastable state samarium ferroalloy nitridation crystallization |
| CN108994311A (en) * | 2018-08-02 | 2018-12-14 | 兰州大学 | A kind of method of solid salt mist projection granulating and reduction-diffusion process preparation anisotropy high-performance samarium iron nitrogen permanent magnetic alloy powder |
| CN110117752A (en) * | 2019-06-24 | 2019-08-13 | 江西理工大学 | A method of preparing samarium ferroalloy |
| CN110117752B (en) * | 2019-06-24 | 2021-05-07 | 江西理工大学 | Method for preparing samarium-iron alloy |
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