JPH05304008A - Manufacture of nitride magnetic powder - Google Patents
Manufacture of nitride magnetic powderInfo
- Publication number
- JPH05304008A JPH05304008A JP4109894A JP10989492A JPH05304008A JP H05304008 A JPH05304008 A JP H05304008A JP 4109894 A JP4109894 A JP 4109894A JP 10989492 A JP10989492 A JP 10989492A JP H05304008 A JPH05304008 A JP H05304008A
- Authority
- JP
- Japan
- Prior art keywords
- pulverized
- pulverizer
- jet
- saturation magnetization
- 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.)
- Granted
Links
- 150000004767 nitrides Chemical class 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000006247 magnetic powder Substances 0.000 title abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 21
- 238000010298 pulverizing process Methods 0.000 abstract description 17
- 230000005415 magnetization Effects 0.000 abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 13
- 239000007789 gas Substances 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 239000011261 inert gas Substances 0.000 abstract description 3
- 229910052786 argon Inorganic materials 0.000 abstract description 2
- 229910052734 helium Inorganic materials 0.000 abstract description 2
- 239000001307 helium Substances 0.000 abstract description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003570 air Substances 0.000 abstract 2
- 239000000696 magnetic material Substances 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 229910052772 Samarium Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- 229910011208 Ti—N Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 229910001337 iron nitride Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000011802 pulverized particle Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052727 yttrium 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
- H01F1/04—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)
- Disintegrating Or Milling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は優れた磁気特性を有する
希土類−鉄系窒化物の磁粉製造方法に関する。該窒化物
磁粉は優れた磁気特性を有するため、小型モーター、ア
クチエーター等として家庭電化製品、音響機器、オフィ
ス機器、自動車分野等に利用されると同時に医療機器用
大型磁石として使用されるなどエレクトロニクスの種々
の分野で幅広い用途がある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing magnetic powder of rare earth-iron nitride having excellent magnetic properties. Since the nitride magnetic powder has excellent magnetic properties, it is used as a small motor, an actuator, etc. in home appliances, audio equipment, office equipment, automobile fields, etc., and at the same time used as a large magnet for medical equipment. It has a wide range of applications in various fields.
【０００２】[0002]
【従来の技術】該窒化物磁粉の製造方法はこれまでいろ
いろな粉砕方法が提案されているが、これまでの方法で
は微粉化することにより、保磁力の向上は計れるものの
飽和磁化は大きく低下し満足のいくものではなく、磁粉
をボンド磁石にする際充填密度が上がらない等の問題が
あった。また粉砕にかかるエネルギ−コストも大きいた
めより経済的な新しい微粉の製造方法が望まれている。2. Description of the Related Art Although various pulverizing methods have been proposed so far as the method for producing the nitride magnetic powder, the coercive force can be improved by pulverizing the powder by the conventional methods, but the saturation magnetization is greatly reduced. It is not satisfactory, and there is a problem that the packing density does not increase when the magnetic powder is used as a bonded magnet. Further, since the energy cost for pulverization is large, a more economical new method for producing fine powder is desired.
【０００３】[0003]
【発明が解決しようとする課題】本発明は該窒化物を微
粉化するにあたり、飽和磁化の低下が少なく、保磁力の
向上を図れるだけでなく、かつジェット粉砕に用いるガ
ス量を少なくする粉砕方法を提供しようとするものであ
る。DISCLOSURE OF THE INVENTION In the present invention, when the nitride is pulverized, the saturation magnetization is less reduced, the coercive force is improved, and the amount of gas used for jet pulverization is reduced. Is to provide.
【０００４】[0004]
【課題を解決するための手段】本発明は該窒化物を微粉
化するにあたり、飽和磁化の低下が少なく、保磁力の向
上を計れるだけでなく磁粉をボンド磁石にする際充填密
度を向上させ、ジェット粉砕に用いるガス量を少なくす
る粉砕方法を鋭意検討した結果、本発明に至った。According to the present invention, when the nitride is pulverized, the saturation magnetization is less decreased, the coercive force is improved, and the packing density is improved when the magnetic powder is used as a bonded magnet. As a result of intensive studies on a pulverization method for reducing the amount of gas used for jet pulverization, the present invention has been accomplished.
【０００５】すなわち、本発明は磁石材料である希土類
−鉄系窒化物をジェット粉砕機で粉砕した後、さらに湿
式粉砕機を用いて微粉砕する事を特徴とする窒化物磁性
粉の製造方法である。本発明において希土類−鉄系窒化
物とはＲ−Ｆｅ−Ｎ−Ｘ−Ｚ系で表される磁石材料であ
る〔ここでＲは希土類元素（Ｌａ，Ｃｅ，Ｐｒ，Ｎｄ，
Ｓｍ，Ｅｕ，Ｇｄ，Ｔｂ，Ｄｙ，Ｈｏ，Ｅｒ，Ｔｍ，Ｙ
ｂ）およびＹの中から選ばれた１種以上の元素を言う。
ＸはＢ，Ｔｉ，Ｍｏ，Ｃｒ，Ｃｏの中から選ばれた１種
以上の元素を言うが、含有しない場合もある。ＺはＯ，
Ｈ、Ｃの中から選ばれた１種以上の元素を言うが、含有
しない場合もある。〕。That is, the present invention relates to a method for producing a magnetic nitride powder, which comprises crushing a rare earth-iron-based nitride, which is a magnet material, with a jet crusher, and then finely crushing it with a wet crusher. is there. In the present invention, the rare earth-iron-based nitride is a magnet material represented by the R—Fe—N—X—Z system [where R is a rare earth element (La, Ce, Pr, Nd,
Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Y
b) and one or more elements selected from Y.
X represents one or more elements selected from B, Ti, Mo, Cr and Co, but may not be contained. Z is O,
It means at least one element selected from H and C, but it may not be contained. ].
【０００６】Ｒは好ましくはＳｍ，Ｎｄ、Ｐｒ，Ｃｅ，
Ｄｙ，Ｇｄ，Ｌａであり、さらに好ましくはＳｍ，Ｎ
ｄ，Ｐｒである。ＸはＢ，Ｔｉ，Ｍｏ，Ｃｒ，Ｃｏを言
うが、好ましくはＢ，Ｃｒ，Ｃｏ，であり、さらに好ま
しくはＢである。好ましい具体例としては、Ｒ−Ｆｅ−
Ｎ系，Ｒ−Ｆｅ−Ｎ−Ｈ系，Ｒ−Ｆｅ−Ｎ−Ｏ系，Ｒ−
Ｆｅ−Ｎ−Ｈ−Ｏ系，Ｒ−Ｆｅ−Ｂ−Ｎ系，Ｒ−Ｆｅ−
Ｍｏ−Ｎ系，Ｒ−Ｆｅ−Ｔｉ−Ｎ系，Ｒ−Ｆｅ−Ｍｏ−
Ｔｉ−Ｎ系であり、さらに好ましくは、Ｒ−Ｆｅ−Ｎ
系，Ｒ−Ｆｅ−Ｎ−Ｈ系，Ｒ−Ｆｅ−Ｎ−Ｏ系，Ｒ−Ｆ
ｅ−Ｎ−Ｈ−Ｏ系である。また、これらは結晶構造とし
て、六方晶系、菱面体系、正方晶系のいずれかである事
が望ましい。R is preferably Sm, Nd, Pr, Ce,
Dy, Gd, La, more preferably Sm, N
d and Pr. X is B, Ti, Mo, Cr, Co, preferably B, Cr, Co, and more preferably B. As a preferred specific example, R-Fe-
N system, R-Fe-N-H system, R-Fe-N-O system, R-
Fe-N-H-O system, R-Fe-B-N system, R-Fe-
Mo-N type, R-Fe-Ti-N type, R-Fe-Mo-
Ti-N type, more preferably R-Fe-N
System, R-Fe-N-H system, R-Fe-N-O system, R-F
e-N-H-O system. Further, it is desirable that these have a crystal structure of any of a hexagonal system, a rhombohedral system, and a tetragonal system.
【０００７】ジェットミル粉砕機は、空気または、窒
素、ヘリウム、アルゴンなどの不活性ガス、好ましく
は、窒素および空気の混合気体の圧力流体によって、加
速された原料粒子が、粒子同士または、壁への衝突によ
って粉砕が進行していく機構である。この様な機構によ
ってのみ該窒化物の結晶構造に大きなストレスを与えず
粉砕することができるので、飽和磁化の低下が少なく、
保磁力の向上が計れる。In a jet mill pulverizer, raw material particles accelerated by a pressure fluid of air or an inert gas such as nitrogen, helium or argon, preferably a mixed gas of nitrogen and air, are transferred to each other or to a wall. This is a mechanism in which crushing progresses due to the collision of. Only by such a mechanism, it is possible to grind without giving a large stress to the crystal structure of the nitride, so that the decrease in saturation magnetization is small,
The coercive force can be improved.
【０００８】このとき、粉砕時の酸素濃度Ｃは、 ０＜
Ｃ≦２１vol ％であることが好ましく、さらに好ましく
は0.001 ≦Ｃ≦１０vol ％、特に好ましくは0.01≦Ｃ≦
５vol ％である。この酸素濃度範囲では、粉砕された該
窒化物粒子表面が安定な薄い酸化膜に覆われるため、凝
集性の低い微粒子が得られる。酸素を含まない雰囲気中
での粉砕では、粉砕され表面が活性になった粒子が、粒
子同士または、壁面に付着して粉砕の進行が遅くなる。
酸素濃度が高い雰囲気中では、活性な粒子表面の急激な
酸化が起こり易く取扱いが難しくなる。また酸化により
表面に軟磁性層ができ物性が低下しやすい。At this time, the oxygen concentration C during grinding is 0 <
C ≦ 21 vol%, more preferably 0.001 ≦ C ≦ 10 vol%, particularly preferably 0.01 ≦ C ≦
It is 5 vol%. In this oxygen concentration range, the surface of the crushed nitride particles is covered with a stable thin oxide film, so that fine particles having low cohesiveness can be obtained. In the pulverization in an atmosphere not containing oxygen, the pulverized particles whose surfaces are activated adhere to each other or to the wall surface, and the pulverization progresses slowly.
In an atmosphere with a high oxygen concentration, the surface of active particles is likely to be rapidly oxidized, which makes handling difficult. Moreover, a soft magnetic layer is formed on the surface by oxidation, and the physical properties are likely to deteriorate.
【０００９】この時使用するガス流体の圧力Ｐは、１kg
/cm2≦Ｐが好ましく、さらに好ましくは３kg/cm2≦Ｐ、
特に好ましくは５≦Ｐ≦１０kg/cm2である。１kg/cm2以
下の圧力では、粉子を加速する力が弱く、従って十分な
粉砕力が得られにくく高保磁力の微粉がえられにくくな
る。また１０kg/cm2以上の圧力流体を使用した場合は、
容器の耐圧や摩耗などの装置的な問題が発生し易く、ま
た物性の低い過粉砕品の発生が多くなる。５≦Ｐ≦１０
kg/cm2の圧力流体を使用したときが工業的に最も効率よ
く、また物性の高い微粉をえることができる。The pressure P of the gas fluid used at this time is 1 kg.
/ cm 2 ≦ P is preferable, more preferably 3 kg / cm 2 ≦ P,
Particularly preferably, 5 ≦ P ≦ 10 kg / cm 2 . At a pressure of 1 kg / cm 2 or less, the force for accelerating the powder particles is weak, so that it is difficult to obtain a sufficient crushing force and it becomes difficult to obtain fine powder having a high coercive force. When using a pressure fluid of 10 kg / cm 2 or more,
Device problems such as pressure resistance and wear of the container are likely to occur, and over-ground products with low physical properties are often generated. 5 ≦ P ≦ 10
When a pressure fluid of kg / cm 2 is used, it is possible to obtain fine powder with the most efficient industrial properties and high physical properties.
【００１０】ジェット粉砕機で、該窒化物の粉砕を行う
と結晶構造に大きなストレスを与える事なく微粒子化が
可能になるが、一方粒子径が小さくなると粉砕効率が悪
くなり、特に該窒化物の場合、高価な不活性ガスを使用
する場合が多いため大きなコスト負担になる。本発明
は、まずジェット粉砕で適当な粒度まで粉砕し、それ以
降の粉砕は湿式粉砕機で行うと、飽和磁化の低下が少な
く、保磁力の向上を図れるだけでなく磁粉をボンド磁石
にする際充填密度を向上させ、粉砕にかかるエネルギ−
コストを少なくする事ができる。When the nitride is pulverized with a jet pulverizer, it becomes possible to make fine particles without giving a large stress to the crystal structure. On the other hand, when the particle diameter is small, the pulverization efficiency is deteriorated. In this case, an expensive inert gas is often used, which causes a large cost burden. According to the present invention, first, when the powder is pulverized to an appropriate particle size by jet pulverization, and the subsequent pulverization is performed with a wet pulverizer, the saturation magnetization is less decreased, and the coercive force can be improved. Energy required for crushing to improve packing density
The cost can be reduced.
【００１１】ジェット粉砕で行う粉砕粒度範囲は、必要
とされる特性、コスト等のバランスで変化するが、通常
ジェット粉砕でおこなう平均粒径は２. ５〜２０μｍま
でであり、好ましくは、２．５〜１０μｍである。この
後、湿式粉砕機を用いてさらに平均粒径で１〜３μｍま
で微粉砕する。大きな粒径の粒子を湿式粉砕機にかける
と飽和磁化の低下が大きくなる。The crushing particle size range of the jet crushing varies depending on the balance of the required properties and cost, but the average particle size of the jet crushing is usually 2.5 to 20 μm, preferably 2. It is 5 to 10 μm. After that, the powder is further finely pulverized to an average particle size of 1 to 3 μm using a wet pulverizer. When a particle having a large particle size is subjected to a wet pulverizer, the saturation magnetization is greatly reduced.
【００１２】操作温度範囲に特に制限はないが、室温
（ガス温度）で行うのが一般的である。以上のような条
件下で鋭意検討を進めた結果、従来の微粉砕法で製造さ
れた微粉に比べ、飽和磁化の低下が少なく、保磁力の向
上をはかれる粉砕方法を発明した。The operating temperature range is not particularly limited, but it is generally performed at room temperature (gas temperature). As a result of earnest studies under the above conditions, the inventors have invented a pulverization method which has a smaller decrease in saturation magnetization and an improved coercive force than fine powder produced by a conventional fine pulverization method.
【００１３】[0013]
【実施例】次に、実施例によって本発明をさらに説明す
る。飽和磁化および保磁力の測定は振動試料型磁力計
（ＶＳＭ）〔東英工業（株）製、ＶＳＭ−３〕を用いて
測定した。The present invention will be further described with reference to the following examples. The saturation magnetization and coercive force were measured using a vibrating sample magnetometer (VSM) [VSM-3 manufactured by Toei Industry Co., Ltd.].
【００１４】[0014]
【実施例１】平均粒径４５μｍのＳｍ9.0 Ｆｅ76.9Ｎ
13.6Ｈ0.1 Ｏ0.4 の原料合金を壁面への衝突型のジェッ
トミルを用いて窒素ガスにて微粉砕した。粉砕圧を６kg
/cm2とし機内の酸素濃度を１vol ％に調整し、５μｍま
で粉砕した。さらにこの磁粉をあらかじめ滑剤を含有し
たシクロヘキサンとともに湿式のボ−ルミルへ投入し粉
砕し、平均粒径２μｍの微粉を得た。このときジェット
ミルで使用された窒素ガスは１５Ｎｍ3 ／ｋｇ（磁粉）
であった。得られた微粉を振動試料型磁力計（ＶＳＭ）
を用いて測定したところ、保磁力が500oe から8300oeに
向上した。このときの飽和磁化の低下率は５％であっ
た。Example 1 Sm 9.0 Fe 76.9 N having an average particle size of 45 μm
The raw material alloy of 13.6 H 0.1 O 0.4 was finely pulverized with nitrogen gas using a jet mill in which the wall surface was collided. Grinding pressure 6kg
/ cm 2 and then adjusting the oxygen concentration in the cabin to 1 vol%, was ground to 5 [mu] m. Further, this magnetic powder was put into a wet ball mill together with cyclohexane containing a lubricant in advance and pulverized to obtain fine powder having an average particle diameter of 2 μm. Nitrogen gas used in the jet mill at this time was 15 Nm 3 / kg (magnetic powder)
Met. Vibrating sample magnetometer (VSM)
The coercive force was improved from 500oe to 8300oe when measured with. At this time, the rate of decrease in saturation magnetization was 5%.
【００１５】[0015]
【比較例１】平均粒径４５μｍのＳｍ9.0 Ｆｅ76.9Ｎ
13.6Ｈ0.1 Ｏ0.4 の原料合金１００ｇをステンレスのボ
ールミルポット（８００ｃｃ）に入れ微粉砕した。その
ときポットの３分の１容量までステンレスボール（１０
ｍｍ玉）を充填し、容器内を窒素ガスで置換した。１２
５ｒｐｍの速さで６時間粉砕した後取り出し、ボールと
磁粉とを分離した。このとき得られた微粉を振動試料型
磁力計（ＶＳＭ）を用いて測定したところ、保磁力が50
0oe から7500oeに向上した。このときの飽和磁化の低下
率は１０％であった。[Comparative Example 1] Sm 9.0 Fe 76.9 N having an average particle size of 45 μm
100 g of a 13.6 H 0.1 O 0.4 raw material alloy was placed in a stainless ball mill pot (800 cc) and pulverized. At that time, stainless steel balls (10
mm balls) and the inside of the container was replaced with nitrogen gas. 12
The balls were crushed at a speed of 5 rpm for 6 hours and then taken out to separate the balls from the magnetic powder. When the fine powder obtained at this time was measured using a vibrating sample magnetometer (VSM), the coercive force was 50.
Increased from 0oe to 7500oe. The rate of decrease in saturation magnetization at this time was 10%.
【００１６】[0016]
【比較例２】平均粒径４５μｍのＳｍ9.0 Ｆｅ76.9Ｎ
13.6Ｈ0.1 Ｏ0.4 の原料合金を壁面への衝突型のジェッ
トミルを用いて窒素ガスにて微粉砕した。粉砕圧を６kg
/cm2とし機内の酸素濃度を１vol ％に調整し、２μｍま
で粉砕した。この間使用した窒素ガスは２５０Ｎｍ3 ／
ｋｇ（磁粉）であった。得られた微粉を振動試料型磁力
計（ＶＳＭ）を用いて測定したところ、保磁力が500oe
から8200oeに向上した。このときの飽和磁化の低下率は
５％であった。[Comparative Example 2] Sm 9.0 Fe 76.9 N having an average particle size of 45 μm
The raw material alloy of 13.6 H 0.1 O 0.4 was finely pulverized with nitrogen gas using a jet mill in which the wall surface was collided. Grinding pressure 6kg
/ cm 2 and then adjusting the oxygen concentration in the cabin to 1 vol%, was pulverized to 2 [mu] m. The nitrogen gas used during this period was 250 Nm 3 /
It was kg (magnetic powder). The fine powder obtained was measured using a vibrating sample magnetometer (VSM), and the coercive force was 500 oe.
Improved to 8200oe. At this time, the rate of decrease in saturation magnetization was 5%.
【００１７】[0017]
【発明の効果】本発明の製造方法によれば、飽和磁化の
低下が少なく、保磁力の向上が図れるだけでなく、ジェ
ット粉砕に用いるガス量を削減する事が出来る。According to the manufacturing method of the present invention, not only the saturation magnetization is less decreased, the coercive force is improved, but also the amount of gas used for jet pulverization can be reduced.
───────────────────────────────────────────────────── 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 Ｃ２２Ｃ 38/00 ３０３ Ｄ Ｈ０１Ｆ 1/06 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location C22C 38/00 303 DH 01F 1/06
Claims (1)
ェット粉砕機で粉砕した後、さらに湿式粉砕機を用いて
微粉砕する事を特徴とする窒化物磁性粉の製造方法。1. A method for producing a magnetic nitride powder, which comprises crushing a rare earth-iron-based nitride, which is a magnet material, with a jet crusher, and then finely crushing it with a wet crusher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04109894A JP3137726B2 (en) | 1992-04-28 | 1992-04-28 | Method for producing nitride magnetic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04109894A JP3137726B2 (en) | 1992-04-28 | 1992-04-28 | Method for producing nitride magnetic powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05304008A true JPH05304008A (en) | 1993-11-16 |
| JP3137726B2 JP3137726B2 (en) | 2001-02-26 |
Family
ID=14521863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04109894A Expired - Lifetime JP3137726B2 (en) | 1992-04-28 | 1992-04-28 | Method for producing nitride magnetic powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3137726B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5684076A (en) * | 1994-12-16 | 1997-11-04 | Matsushita Electric Industrial Co., Ltd. | Rare earth-iron-nitrogen based magnetic material and method of manufacturing the same |
| US5886077A (en) * | 1994-12-16 | 1999-03-23 | Matsushita Electric Industrial Co., Ltd. | Rare-earth-iron-nitrogen based magnetic material and method of manufacturing the same |
-
1992
- 1992-04-28 JP JP04109894A patent/JP3137726B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5684076A (en) * | 1994-12-16 | 1997-11-04 | Matsushita Electric Industrial Co., Ltd. | Rare earth-iron-nitrogen based magnetic material and method of manufacturing the same |
| US5886077A (en) * | 1994-12-16 | 1999-03-23 | Matsushita Electric Industrial Co., Ltd. | Rare-earth-iron-nitrogen based magnetic material and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3137726B2 (en) | 2001-02-26 |
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