JPS6242003B2 - - Google Patents
Info
- Publication number
- JPS6242003B2 JPS6242003B2 JP58013940A JP1394083A JPS6242003B2 JP S6242003 B2 JPS6242003 B2 JP S6242003B2 JP 58013940 A JP58013940 A JP 58013940A JP 1394083 A JP1394083 A JP 1394083A JP S6242003 B2 JPS6242003 B2 JP S6242003B2
- Authority
- JP
- Japan
- Prior art keywords
- container
- metal particles
- ultrafine
- gas
- ultrafine metal
- 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.)
- Expired
Links
- 239000002923 metal particle Substances 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 13
- 239000007769 metal material Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 11
- 239000010949 copper Substances 0.000 description 11
- 230000005291 magnetic effect Effects 0.000 description 11
- 239000000779 smoke Substances 0.000 description 9
- 238000000746 purification Methods 0.000 description 8
- 239000011882 ultra-fine particle Substances 0.000 description 7
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 5
- 230000005294 ferromagnetic effect Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000635 electron micrograph Methods 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910000828 alnico Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/14—Making metallic powder or suspensions thereof using physical processes using electric discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/12—Making metallic powder or suspensions thereof using physical processes starting from gaseous material
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Hard Magnetic Materials (AREA)
Description
【発明の詳細な説明】
本発明は、に強磁性金属及びその合金等の金属
超微粒子を製造するのに最も適した金属超微粒子
の製造装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for producing ultrafine metal particles most suitable for producing ultrafine metal particles such as ferromagnetic metals and alloys thereof.
従来、例えば強磁性金属及びその合金等の金属
超微粒子を製造する装置としてアーク放電を利用
するものには第１図に示すものがある。すなわち
密閉された容器１内に所要の取付角度で後記銅ハ
ース４に対向して挿入され、電極支持架２の先端
に固定された陰極用のタングステンＷ等の電極３
を挿入し、そして容器１の底部を構成する陽極用
の銅ハース４の上面に陰極用の前記電極３に対向
して金属超微粒子を製造すべき金属材料５が載置
されている。また６は容器１内で製造された金属
超微粒子粉を回収するために、容器１の上部一側
に接続された連絡管６ａを介して設けられたそれ
よりも太い略筒状の回収部、７はポンプを内蔵し
たガス循環精製部で、このガス循環精製部７は連
結管６ｂを介して前記回収部６と接続され、前記
容器１内で使用したガスを精製し、さらに連絡管
７ａ用いて再度、容器１内に送り込むためのもの
である。DCは電源、９は絶縁体である。 2. Description of the Related Art Conventionally, there is a device shown in FIG. 1 that utilizes arc discharge as a device for manufacturing ultrafine metal particles such as ferromagnetic metals and their alloys. That is, an electrode 3 made of tungsten W or the like for a cathode is inserted into a sealed container 1 at a required installation angle facing a copper hearth 4 described below and fixed to the tip of an electrode support frame 2.
A metal material 5 from which ultrafine metal particles are to be produced is placed on the upper surface of a copper hearth 4 for an anode forming the bottom of the container 1, facing the electrode 3 for a cathode. In addition, 6 is a substantially cylindrical collection section that is thicker than the container 1 and is provided via a communication pipe 6a connected to one side of the upper part of the container 1 in order to collect the metal ultrafine particle powder produced in the container 1; Reference numeral 7 denotes a gas circulation purification section with a built-in pump. This gas circulation purification section 7 is connected to the recovery section 6 through a connecting pipe 6b, purifies the gas used in the container 1, and further purifies the gas using the connecting pipe 7a. This is for feeding the container 1 into the container 1 again. DC is a power supply, and 9 is an insulator.
かかる構成において先ず容器１内を純水素ガス
或いはこの純水素ガスにアルゴンガス、ヘリウム
ガス等の不活性ガスの１種または２種以上を混ぜ
た混合ガス雰囲気にしてその内圧力を20〜
760Torrの範囲での所要値に設置する。そして10
〜300／min（大気圧換算）の割合で、ガス循
環精製部７のポンプを作動させてガスを循環させ
る。 In this configuration, first, the inside of the container 1 is made into an atmosphere of pure hydrogen gas or a mixed gas of pure hydrogen gas mixed with one or more of inert gases such as argon gas and helium gas, and the internal pressure is increased to 20 to 20°C.
Set to the required value in the range of 760Torr. and 10
The pump of the gas circulation purification section 7 is operated to circulate the gas at a rate of ~300/min (converted to atmospheric pressure).
この条件下で電源DCから10〜100Vの両電極間
電圧を印加して電極３に対向して銅ハース４の上
面に置かれた金属材料５との間にアーク放電を行
つてアーク柱８を形成すると、このアーク柱８の
形状が金属材料５の表面に対して一点に集中する
条件の場合、その近傍が高温になり金属超微粒子
粉が多量に発生して煙流になり、矢印イ方向に上
昇する。その後、この煙流は適当な条件下で循環
するガス流に乗つて矢印ロ方向に運ばれ、冷却さ
れることにより凝結、固化されるため、例えば図
示しない捕収用のフイルタ等を収納した回収部６
で所定粒径の金属超微粒子が製造され、回収され
る。そして回収部６を通過したガスは連絡管６ｂ
を通つてガス循環精製部７で精製され、連絡管７
ａにおいて矢印ハ方向に進み、容器１に送り込ま
れ循環される。 Under these conditions, a voltage of 10 to 100 V is applied between the two electrodes from the power supply DC to cause an arc discharge between the electrode 3 and the metal material 5 placed on the upper surface of the copper hearth 4, thereby forming an arc column 8. When the arc column 8 is formed, if the shape of the arc column 8 is concentrated at one point on the surface of the metal material 5, the vicinity becomes high temperature and a large amount of ultrafine metal particles are generated, forming a smoke stream and moving in the direction of arrow A. rise to Thereafter, this smoke flow is carried in the direction of the arrow B by the circulating gas flow under appropriate conditions, and is condensed and solidified by being cooled. 6
Ultrafine metal particles with a predetermined particle size are produced and recovered. The gas that has passed through the recovery section 6 is then transferred to the connecting pipe 6b.
The gas is purified in the gas circulation purification section 7 through the connecting pipe 7.
At point a, it advances in the direction of arrow C, and is fed into the container 1 and circulated.
しかしながら上記従来の装置で製造された強磁
性の金属及びその合金の超微粒子は、その平均粒
径が単磁区粒子に近いが連鎖状に連なりにくいの
で、形状異方性が充分付加されないため、高保磁
力の金属超微粒子を製造することが困難であつ
た。 However, the ultrafine particles of ferromagnetic metals and their alloys produced using the above-mentioned conventional equipment have an average particle size close to that of single-domain particles, but they are difficult to chain together, so they do not have sufficient shape anisotropy, resulting in high retention. It has been difficult to produce magnetic ultrafine metal particles.
本発明は上述のような従来の問題点を解決せん
としてなされたものであり、その目的とするとこ
ろは従来の装置に大幅な変更を加えることなく高
保磁力の強磁性金属及びその合金の金属超微粒子
を製造できるような金属超微粒子の製造装置を提
供するのにある。 The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to produce a metal superconductor made of high coercive force ferromagnetic metals and their alloys without making major changes to the conventional devices. An object of the present invention is to provide an apparatus for producing ultrafine metal particles that can produce fine particles.
以下本発明の第１実施例を第２図、第４図、第
７図に従つて説明する。 A first embodiment of the present invention will be described below with reference to FIGS. 2, 4, and 7.
また、この実施例において第１図に示す装置と
同一部分については同一符号で示している。 Further, in this embodiment, the same parts as those in the apparatus shown in FIG. 1 are designated by the same reference numerals.
なお容器１は、高さ約800mm、直径約500mmほど
で、その上部一側に接続された直径約60mmほどの
連結管６ａを介してそれよりも太く直径約120mm
ほどの大きさの回収部６に通じ、しかもこの回収
部６は直径約60mmほどの略直角に曲成された連結
管６ｂを介してガス循環精製部７に接続され、さ
らにこのガス循環精製部７は直径約60mmで長さ約
600mm程度の連絡管７ａを用いて容器１の底部に
接続されることにより、ガス循環精製部７内のポ
ンプの吸引力で容器１内のガスは再び容器１内に
循環されるようになつている。 The container 1 has a height of about 800 mm and a diameter of about 500 mm, and is connected to one side of its upper part via a connecting pipe 6a with a diameter of about 60 mm, which is thicker and has a diameter of about 120 mm.
The recovery section 6 is connected to a gas circulation purification section 7 via a connecting pipe 6b bent at an approximately right angle with a diameter of about 60 mm. 7 is about 60mm in diameter and about length
By connecting to the bottom of the container 1 using a connecting pipe 7a of about 600 mm, the gas in the container 1 can be circulated back into the container 1 by the suction force of the pump in the gas circulation purification section 7. There is.
また陰極用の電極３は、タングステン、タング
ステンに１〜２重量パーセントのトリウムを添加
したトリタン等を用いて長さ約50mm、直径約５mm
に形成され、しかも長さ約40mm、直径約30mmほど
の電極支持架２の先端に固定されることにより、
陽極用の厚さ約100mm程度の銅ハース４に対して
約30゜の取付角度で対向して取付けられている。 The cathode electrode 3 is made of tungsten, tritanium, etc., which is made by adding 1 to 2 percent by weight of thorium to tungsten, and has a length of about 50 mm and a diameter of about 5 mm.
By being fixed to the tip of the electrode support frame 2, which has a length of about 40 mm and a diameter of about 30 mm,
It is mounted at an angle of about 30° to face the copper hearth 4 for the anode, which has a thickness of about 100 mm.
１０は容器１に発生する煙流Ａ内に容器１の天
井から図示しない取付金具を用いて垂下された冷
却棒で、この冷却棒１０は長さが約600mmで、直
径約30mmの銅又は黄銅製の支持筒体１１を水冷す
るように冷却水を導入するための入口１２と出口
１３とを前記支持筒体１１に被射させる厚さ約20
mmの蓋部材１６に装着し、そしてフエライト、ア
ルニコ、稀土類コバルト等の磁性材料で形成さ
れ、さらに対向する相互が同極に着磁されたリン
グ状の永久磁石１４Ａ，１４Ｂを非磁性体で形成
された厚さ約10mmほどのスペーサ１５を介して軸
長方向内部に数対、配置して形成される。この場
合、支持筒体１１を冷却するための冷却液として
水のほか、アルコール、フレオンが用いられ、冷
却棒１０を263〜373〓の温度範囲で冷却するよう
にしている。なお、銅ハース４から最下部の永久
磁石１４Ａの下面までの距離L1は１〜５cm、ま
た銅ハース４から最上部の永久磁石１４Ｂの上面
までの距離L2は50cm以上である。 Reference numeral 10 denotes a cooling rod that is suspended from the ceiling of the container 1 into the smoke flow A generated in the container 1 using a mounting bracket (not shown). An inlet 12 and an outlet 13 for introducing cooling water so as to water-cool the copper support cylinder 11 are exposed to the support cylinder 11 with a thickness of about 20 mm.
mm cover member 16, and ring-shaped permanent magnets 14A and 14B made of a magnetic material such as ferrite, alnico, and rare earth cobalt, and facing each other and magnetized with the same polarity, are made of a non-magnetic material. Several pairs are arranged inside in the axial direction with spacers 15 having a thickness of about 10 mm interposed therebetween. In this case, water, alcohol, and Freon are used as a cooling liquid for cooling the support cylinder 11, and the cooling rod 10 is cooled within a temperature range of 263 to 373 degrees. Note that the distance L 1 from the copper hearth 4 to the lower surface of the lowest permanent magnet 14A is 1 to 5 cm, and the distance L 2 from the copper hearth 4 to the upper surface of the uppermost permanent magnet 14B is 50 cm or more.
本発明の第１実施例は上述のような構成からな
り、容器１内に純水素のガス或いはこの純水素ガ
スとヘリウム、アルゴン、ネオン等の不活性ガス
の１種または２種以上との混合ガスの容器内圧力
を80Torr、ガス流量100／min、アーク放電電
圧25V、アーク放電電流200A、ポンプを内蔵した
ガス循環精製部７の後段における排気循環圧が20
〜1500Torrの条件で電極３と銅ハース４上の略
中心位置に載置された直径約70mmほどのボタン状
の金属材料５との間にアーク放電を行つてアーク
柱８を発生させると、例えば銅ハース４上に載置
された鉄―ニツケル合金（鉄：ニツケルの組成比
が90：10重量パーセント）の金属材料５から金属
超微粒子の煙流Ａが発生し、矢印イ′方向に上昇
する。しかし煙流Ａにはその領域内に容器１の天
井面から図示しない取付金具等を用いて固定さ
れ、しかも冷却水がその内部に導入、排出されて
263〜373〓の冷却温度範囲に保持される冷却棒１
０によつて冷却されるため、煙流Ａは冷却棒１０
の周囲の矢印イ′方向に絞られて上昇する。この
場合に冷却棒１０内には例えばフエライト製で隣
り合う相互が同極（例えばＮ―Ｎ極、Ｓ―Ｓ極）
に着磁した直径が約28mm、高さ約20mmの寸法のリ
ング状で磁束密度が1000〜2000ガウスの永久磁石
１４Ａ，１４Ｂを対向して数対、配置しているの
で、この同極同志に対向し合う永久磁石１４Ａ，
１４Ｂからの同極の洩れ磁束Ｇ，Ｇが、煙流イ′
内の鉄―ニツケル合金の金属超微粒子が上昇して
通過する際に磁場の影響を大きく作用させ、回収
部６には約10ｇ／minの金属超微粒子が回収され
る。そして第１図の従来の装置で製造された第６
図の電子顕微鏡写真で示した鉄―ニツケル合金の
金属超微粒子と異なり第７図で示す電子顕微鏡写
真のように金属超微粒子の連鎖状態が改良され形
状異方性が増大する。そして回収部６で回収され
た従来の鉄―ニツケル合金の金属超微粒子の磁気
特性が保磁力940Oe、飽和磁束密度143emu／ｇ
であるのに対して第７図で示す本実施例の装置で
示した鉄―ニツケル合金の金属超微粒子粉の磁気
特性はその保磁力が1460Oe、飽和磁束密度
151emu／ｇである。 The first embodiment of the present invention has the above-mentioned configuration, and contains pure hydrogen gas or a mixture of pure hydrogen gas and one or more inert gases such as helium, argon, and neon in the container 1. The pressure inside the gas container is 80Torr, the gas flow rate is 100/min, the arc discharge voltage is 25V, the arc discharge current is 200A, and the exhaust circulation pressure at the downstream stage of the gas circulation purification section 7 with a built-in pump is 20Torr.
When arc discharge is performed between the electrode 3 and a button-shaped metal material 5 with a diameter of about 70 mm placed approximately at the center position on the copper hearth 4 under conditions of ~1500 Torr to generate an arc column 8, for example, A smoke stream A of ultrafine metal particles is generated from the metal material 5 of iron-nickel alloy (composition ratio of iron:nickel is 90:10 weight percent) placed on the copper hearth 4 and rises in the direction of arrow A'. . However, smoke flow A is fixed within that area from the ceiling surface of container 1 using mounting brackets (not shown), and cooling water is introduced into and discharged from the inside.
Cooling rod 1 maintained in the cooling temperature range of 263~373〓
0, the smoke stream A is cooled by the cooling rod 10
It narrows down and rises in the direction of arrow A' around the area. In this case, the inside of the cooling rod 10 is made of, for example, ferrite, and adjacent ones have the same polarity (for example, N-N poles, S-S poles).
Several pairs of permanent magnets 14A and 14B are arranged facing each other in the form of a ring with a magnetized diameter of about 28 mm and a height of about 20 mm and a magnetic flux density of 1000 to 2000 Gauss. Permanent magnets 14A facing each other,
The leakage magnetic fluxes G and G of the same polarity from 14B cause the smoke flow
When the iron-nickel alloy metal ultrafine particles inside rise and pass, the influence of the magnetic field is greatly exerted, and about 10 g/min of metal ultrafine particles are collected in the collection section 6. and a sixth device manufactured using the conventional apparatus shown in FIG.
Unlike the ultrafine metal particles of the iron-nickel alloy shown in the electron micrograph of the figure, the chain state of the ultrafine metal particles is improved and the shape anisotropy increases, as shown in the electron micrograph of FIG. The magnetic properties of the conventional iron-nickel alloy metal ultrafine particles recovered in the recovery section 6 are a coercive force of 940 Oe and a saturation magnetic flux density of 143 emu/g.
On the other hand, the magnetic properties of the iron-nickel alloy metal ultrafine particle powder shown in the apparatus of this example shown in Fig. 7 have a coercive force of 1460 Oe and a saturation magnetic flux density.
It is 151emu/g.
第３図及び第５図は本発明の第２実施例であ
り、この実施例では銅ハース４上に載置した金属
材料５の直上に陰極としての電極３を一体に形成
した長さが約700mm程度で、直径が30mm程度の冷
却棒１０′を配置したことにより、電極支持架２
は省略されて部品点数は削減できるとともに金属
超微粒子の発生源としての金属材料５と、この電
極３との間にアーク柱８が金属材料５の直上にお
いて発生されることによつて金属材料５を全体的
に平均化して加熱、溶解させて第２図に示す本願
第１実施例に比べて金属超微粒子の発生濃度が高
い煙流Ａを発生させるようになし、さらには蓋部
材１６は電源DCの負端子に接続された点が異な
る。 3 and 5 show a second embodiment of the present invention. In this embodiment, an electrode 3 as a cathode is integrally formed directly above a metal material 5 placed on a copper hearth 4, and the length is approximately By arranging cooling rods 10' with a diameter of about 700 mm and a diameter of about 30 mm, the electrode support rack 2
is omitted, the number of parts can be reduced, and an arc column 8 is generated directly above the metal material 5 between the metal material 5 as a source of ultrafine metal particles and this electrode 3. is heated and melted to generate a smoke flow A with a higher concentration of ultrafine metal particles than in the first embodiment of the present application shown in FIG. The difference is that it is connected to the negative terminal of DC.
なお上記実施例では金属材料５として鉄―ニツ
ケル合金を用いたことによつて特に金属超微粒子
粉の保磁力が約500Oeほど向上されたが、その他
に鉄―コバルト、鉄―コバルト―ニツケル、鉄―
モリブデン、鉄―バナジウム等の強磁性金属、合
金についても本発明の装置を用いたことによつて
磁気特性の優れた金属超微粒子粉が製造できる。 In the above example, by using an iron-nickel alloy as the metal material 5, the coercive force of the metal ultrafine particle powder was particularly improved by about 500 Oe. ―
By using the apparatus of the present invention for ferromagnetic metals and alloys such as molybdenum and iron-vanadium, ultrafine metal particles with excellent magnetic properties can be produced.
上述のように本発明は、支持筒体内に着磁した
永久磁石の極が隣り同志が同極になるように対向
して軸長方向に数対、設けた冷却棒を金属材料か
らの煙流の内部に配置しただけで従来の装置に大
幅な変更を加えることがないのでコスト安であ
る。また金属材料からの金属超微粒子の煙流に永
久磁石からの洩れ磁束を作用させて磁場の影響を
大きく受けるようにしたからその金属及び合金の
超微粒子の形態は連鎖状態が一層、改良され、形
状異方性が増大される。このため、本発明の装置
で製造された金属超微粒子は、従来の装置で得ら
れるものよりも高保磁力となる。 As described above, in the present invention, several pairs of cooling rods are installed in the axial direction so that the poles of magnetized permanent magnets are adjacent to each other and have the same polarity in the supporting cylinder. The cost is low because it is simply placed inside the device and no major changes are made to the conventional device. In addition, the leakage magnetic flux from the permanent magnet is applied to the smoke flow of ultrafine metal particles from the metal material, so that it is greatly influenced by the magnetic field, so the chain state of the ultrafine metal and alloy particles is further improved. Shape anisotropy is increased. Therefore, the ultrafine metal particles produced by the apparatus of the present invention have a higher coercive force than those obtained by conventional apparatuses.
第１図は従来の金属超微粒子製造装置を示す
図、第２図及び第３図はそれぞれ本発明に係る製
造装置の第１、第２実施例を示す図、第４図及び
第５図はそれぞれ第２図及び第３図の冷却棒の詳
細を示す図、第６図及び第７図はそれぞれ従来及
び本発明に係る製造装置によつて得られた金属超
微粒子粉を示す電子顕微鏡写真である。
１…容器、２…電極支持架、３…電極、４…銅
ハース、５…金属材料、６…回収部、７…ガス循
環精製部、８…アーク柱、９…絶縁体、１０…冷
却棒、１１…支持筒体、１２…入口、１３…出
口、１４Ａ，１４Ｂ…永久磁石。
FIG. 1 is a diagram showing a conventional ultrafine metal particle manufacturing apparatus, FIGS. 2 and 3 are diagrams showing first and second embodiments of the manufacturing apparatus according to the present invention, and FIGS. 4 and 5 are FIGS. 2 and 3 are diagrams showing the details of the cooling rod, respectively, and FIGS. 6 and 7 are electron micrographs showing ultrafine metal powder obtained by the conventional manufacturing apparatus and the manufacturing apparatus according to the present invention, respectively. be. DESCRIPTION OF SYMBOLS 1... Container, 2... Electrode support frame, 3... Electrode, 4... Copper hearth, 5... Metal material, 6... Recovery section, 7... Gas circulation purification section, 8... Arc column, 9... Insulator, 10... Cooling rod , 11... Support cylinder, 12... Inlet, 13... Outlet, 14A, 14B... Permanent magnet.
Claims (1)
にアークを発生させて金属超微粒子を製造する金
属超微粒子の製造装置において、冷却手段を支持
筒内に有し、且つ着磁した永久磁石の極を互いに
同極同志になるように軸長方向に数対設けた冷却
棒を配置したことを特徴とする金属超微粒子の製
造装置。1 In an apparatus for producing ultrafine metal particles that produces ultrafine metal particles by generating an arc between a cathode electrode and a metal material placed on an anode, a permanent magnet that has a cooling means in a support cylinder and 1. An apparatus for producing ultrafine metal particles, characterized in that several pairs of cooling rods are arranged in the axial direction so that the poles of the magnets are the same as each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58013940A JPS59140305A (en) | 1983-01-31 | 1983-01-31 | Manufacturing apparatus of ultrafine metallic particle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58013940A JPS59140305A (en) | 1983-01-31 | 1983-01-31 | Manufacturing apparatus of ultrafine metallic particle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59140305A JPS59140305A (en) | 1984-08-11 |
| JPS6242003B2 true JPS6242003B2 (en) | 1987-09-05 |
Family
ID=11847195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58013940A Granted JPS59140305A (en) | 1983-01-31 | 1983-01-31 | Manufacturing apparatus of ultrafine metallic particle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59140305A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12330126B2 (en) * | 2021-01-25 | 2025-06-17 | Jiangsu Boqian New Materials Stock Co., Ltd. | Ultrafine powder particle aggregation and cooling tank-type structure and ultrafine powder particle forming method |
| KR20230034378A (en) * | 2021-01-25 | 2023-03-09 | 비 중 | Ultra-fine particle agglomeration cooling tubular structure and method for forming ultra-fine particles |
-
1983
- 1983-01-31 JP JP58013940A patent/JPS59140305A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59140305A (en) | 1984-08-11 |
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