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公开(公告)号：JPS59123701A
公开(公告)日：1984-07-17
申请号：JP22984882
申请日：1982-12-28
发明人： MIYATSUKA HAJIME , AKASHI GOROU
CPC分类号： B22F1/0059
摘要： PURPOSE:To manufacture ferromagnetic metallic powder which can be treated safely and efficiently, by applying compressive force and shearing force to ferromagnetic metallic powder obtd. by a low-vacuum evaporation method in a nonreactive gas or liq. to increase the bulk density. CONSTITUTION:The bulk density of ferromagnetic metallic powder with =0.3g/ml by applying compressive force and shearing force in a nonreactive gas or liq. by means of a roll mill or the like. Said nonreactive gas is an inert gas such as Ar, gaseous N2 or the like, and said nonreactive liq. is an org. solvent such as benzene. The stability of the ferromagnetic metallic powder is further improved by dissolving a surface treating agent such as a silicon compound in the solvent.
摘要翻译： 目的：通过对铁磁性金属粉末施加压力和剪切力，制造可以安全有效地处理的铁磁性金属粉末。 通过在非反应性气体或液体中的低真空蒸发方法。 以增加堆积密度。 构成：铁磁性金属粉末的体积密度<=约0.1g / ml体积密度。 通过在惰性气体中通过在非反应性气体或液体中施加压缩力和剪切力，在低压下通过蒸发而增加至> = 0.3g / ml。 通过辊磨机等。 所述非反应性气体是诸如Ar，气态N 2等的惰性气体，和所述非反应性液体。 是一个组织 溶剂如苯。 通过将诸如硅化合物的表面处理剂溶解在溶剂中来进一步提高强磁性金属粉末的稳定性。
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公开(公告)号：JPS5985807A
公开(公告)日：1984-05-17
申请号：JP19452682
申请日：1982-11-08
发明人： YOSHIKAWA TAKAMASA , UNOSAWA YASUHIRO , TAKASUGI SATORU , OGASAWARA KIYOHIDE , ITOU HIROSHI , TSUKAGOSHI NOBUHIRO
摘要： PURPOSE:To produce ultrafine metallic particles having a uniform grain size at a high yield in a device for making use of arc discharge in pulverizing a ferromagnetic metal to ultrafine particles by providing a filter enclosing an arc part. CONSTITUTION:A tungsten cathode 3 is supported by a supporting rod 2 in a hermetic refractory vessel 1 and a copper hearth 4 as an anode is placed in the lower part thereof. The inside of the vessel 1 is maintained under an atmosphere of pure gaseous hydrogen or a gaseous mixture of pure hydrogen and inert gas such as gaseous Ar, gaseous He, etc., wherein a ferromagnetic metal 5 such as Fe, Ni or the like is placed and arc discharge 6 is generated between said metal as the anode and the cathode 3. The metal 5 is melted by the arc 6 to form the ultrafine particles which ascend in an arrow (a) direction and descend in the direction of an arrow 12 after the particles are cooled in the upper part. A cylindrical filter 7 made of Ti, Ta, etc. is placed around the arc 6 in this case of capture the ultrafine particulate metal entering the arc part again after descending. The ultrafine particulate metal is formed at a high yield without being sintered again by the arc.
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公开(公告)号：JPS58133307A
公开(公告)日：1983-08-09
申请号：JP1327282
申请日：1982-02-01
申请人： HITACHI LTD
发明人： KASUKABE SUSUMU
IPC分类号： B22F9/12
摘要： PURPOSE:To prepare an ultrafine particle having a uniform particle size and good dispersibility in good efficiency, by a method wherein the wall of an evaporation chamber is cooled to the m.p. of an inert gas or less to form the solid film of the inert gas and a material is evaporated onto the solid film while said gas is exhausted. CONSTITUTION:An evaporation chamber 1 made of stainless steel is evacuated to predetermined pressure by a diffusion pump 2 and liquid nitrogen 13 is introduced into a container 14 until the wall of the evaporation chamber 1 is perfectly immersed therein to cool the wall 15 to the m.p. of Xe. In the next step, a shutter 16 for coolecting an ultrafine particle and a valve 3 are closed and Xe is introduced into the chamber 1 from a gas bomb 4 to form the solid film of Xe on the inner surface of the wall 15. Subsequently, the valve 3 is again opened and, while evacuation is succeeded by the pump 2, voltage is applied to both ends of a boat 10 fixed to a conductive post 9 through a lead wire 8 for a filament to evaporate gold 17 by resistance heating. The formed gold vapor is condensed on and adhered to the wall to prepare ultrafine particles and this ultrafine particles are fallen into a container 20 by the sublimation of the solid film.
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公开(公告)号：JPS5879542A
公开(公告)日：1983-05-13
申请号：JP17812781
申请日：1981-11-05
申请人： DAIDO STEEL CO LTD
发明人： IWAMA SABUROU , SHICHI EIICHI
摘要： PURPOSE:To improve energy efficiency considerably and to improve the recovering efficiency of fine powder by providing a reflection plate of a specular surface finish centering at the focusing point of electron beams and charging the reflection plate to the potential of the same polarity as that of fine particles. CONSTITUTION:A spherical or cylindrical reflection plate 15 centering at a focusing point 5 of electron beams is provided in an irradiation chamber 2, and the inside of the plate 15 is finished to a specular surface applied with aluminum vapor deposition on the surface of stainless steel. The plate 15 is charged to the minus potential of the same polarity as that of the potential charged to fine particles of the metal. The fine particles formed repulse from the plate 15 of minus potential and are attracted in the direction of a recovering device 11 of plus potential by which the particles are stuck on the outside circumference thereof. As the device 11 rotates, the fine powder on the outside circumference of the recovering device is recovered successively in a recovering bottle 14 by the effect of a scraper piece 13.
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公开(公告)号：JPS57207539A
公开(公告)日：1982-12-20
申请号：JP9421581
申请日：1981-06-17
申请人： DAIDO STEEL CO LTD
发明人： IWAMA SABUROU
摘要： PURPOSE:To eliminate the outflow of formed fine powder to an electron gun chamber ad to make continuous production possible by providing a gaseous pressure region higher than the pressure of an irradiation chamber between the evacuated irradiation chamber and an electron chamber of a pressure lower than that of the irradiation chamber. CONSTITUTION:A prescribed gaseous atmosphere is supplied through a gaseous atmosphere gas supply pipe 13 into a high pressure intermediate chamber 12, and an irradiation chamber 1, an electron chamber 3 and an intermediate chamber 4 are evacuated through respective pipings 8, 8, 8 by means of vacuum pumps. The chamber 1 is kept at about 1 torr, the chamber 12 at about 1.5 torr, the chamber 4 at about 10 -10 , and the chamber 3 at about 10 -10 . Since the gaseous atmosphere supplied to the chamber 12 flows at all times to the inside of the chamber 1 through an irradiation line 6 for electron beams, the outflow of the fine powder formed by the evaporation of a material 2 at the beam conversion point 7 in the chamber 1 into the chamber 3 is prevented. The gaseous atmosphere flowing from the chamber 12 into the chamber 1 is recovered of the fine powder by a recovering device 11 containing a cooling medium and is sucked through the pipings 8 to the suction pumps.
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公开(公告)号：JPS57171601A
公开(公告)日：1982-10-22
申请号：JP5703781
申请日：1981-04-17
发明人： SUZUKI HIDEAKI
IPC分类号： A44C27/00 , A44B1/00 , A44B1/02 , A44B1/04 , A44B1/08 , A44B5/00 , A47B95/04 , B22F1/00 , B22F9/12 , B43M9/00 , C22C1/04 , G04B37/22
摘要： PURPOSE:To produce decorative black color metal having gloss from any metallic materials by compressing ultrafine powder of metals and their alloy under heating and finishing the surfaces thereof. CONSTITUTION:When gaseous Ar of about 100Torr is sealed into a vacuum deposition device, and Cu is heated to evaporate by using filaments of W, Cu atoms evaporate and at this same instant, they collide against the residual gaseous molecules of low temp., grow to bigger sizes and stick to the inside wall of the device, thereby forming fine powder. The average grain sizes of this fine powder is within a 0.1-0.01mu range. Next, this fine powder is recovered, and is molded under pressurizing at about 350 deg.C by using a vacuum hot press, then, the molding is machined, ground and finished to accuracy of about 0.5-1mu surface roughness, whereby it is made into the product of a black color tone. Metals and alloys having the characteristics required depending upon use objects are selected for the ultrafine powder. It is equally well to use plasma jet flames as a method of producing the ultrafine powder.
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公开(公告)号：JPS5541999A
公开(公告)日：1980-03-25
申请号：JP11743379
申请日：1979-09-14
申请人： AIR LIQUIDE
发明人： JIYAN FUOORARU , JIERARU BENTSU , JIYAN GAREE
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