JPH08325603A - Low melting point metal particles and method and apparatus for manufacturing the same - Google Patents
Low melting point metal particles and method and apparatus for manufacturing the sameInfo
- Publication number
- JPH08325603A JPH08325603A JP7158734A JP15873495A JPH08325603A JP H08325603 A JPH08325603 A JP H08325603A JP 7158734 A JP7158734 A JP 7158734A JP 15873495 A JP15873495 A JP 15873495A JP H08325603 A JPH08325603 A JP H08325603A
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- Prior art keywords
- melting point
- metal
- cooling liquid
- molten metal
- low melting
- Prior art date
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- Powder Metallurgy (AREA)
Abstract
(57)【要約】
【構成】 融点が２００℃以下の低融点金属粒であっ
て、平均粒径が０．１〜１．０mmφ、球形度が０．９５
以上である金属粒、低融点金属の溶湯を冷却液中に押出
して金属粒を製造する方法において、冷却液に超音波振
動を与えながら冷却液に挿入したノズルから金属溶湯を
押出す低融点金属粒の製造方法、およびその製造装置。
【効果】 本発明方法によれば、ガリウム、水銀、アマ
ルガム等の低融点金属を容易に微小のかつ真球の球状粒
子に形成することでき、またその製造は連続的に行なえ
るためコスト的にも有利である。
(57) [Summary] [Constitution] Low melting point metal particles having a melting point of 200 ° C. or less, an average particle size of 0.1 to 1.0 mmφ, and a sphericity of 0.95.
In the method of producing metal particles by extruding a molten metal of low melting point metal into a cooling liquid, a low melting point metal extruding the molten metal from a nozzle inserted into the cooling liquid while applying ultrasonic vibration to the cooling liquid. Granule manufacturing method and manufacturing apparatus thereof. [Effect] According to the method of the present invention, a low melting point metal such as gallium, mercury or amalgam can be easily formed into fine spherical particles of spherical shape, and the production thereof can be continuously performed, so that it is cost effective. Is also advantageous.
Description
【０００１】[0001]
【産業上の利用分野】本発明は球形の整った低融点金属
粒およびその製造方法と装置に関する。詳しくは、ガリ
ウム、水銀、アマルガムなどの低融点金属の微小粒とそ
の製造手段に関する。本製造手段によれば、平均粒径
０．１〜１．０mmφのほぼ真球状の微粒子を得ることが
でき、本製造手段によって得たガリウム粒子は各種ラン
プの封印発光粒子として最適である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to spherical low-melting-point metal particles and a method and apparatus for producing the same. More specifically, the present invention relates to fine particles of a low melting point metal such as gallium, mercury and amalgam and a manufacturing method thereof. According to this manufacturing method, it is possible to obtain fine particles having a substantially spherical shape with an average particle diameter of 0.1 to 1.0 mmφ, and the gallium particles obtained by this manufacturing method are most suitable as sealed light emitting particles for various lamps.
【０００２】[0002]
【従来技術とその課題】金属ガリウムはハロゲン化金属
ランプの封印発光金属として有用であるが、この発光材
料として用いるには、個々の重量バラツキを１０％以内
に、好ましくは５％以内にすることが必要であり、その
ためには粒径が０．１〜１．０mmφの間でフルイによっ
て重量選別できる真球に近い微小粒子とすることが重要
である。しかし、従来の方法では球形の整ったガリウム
微粒子を得ることが難しいという問題がある。2. Description of the Related Art Metallic gallium is useful as a sealed light-emitting metal for metal halide lamps, but when used as a light-emitting material, the individual weight variation should be within 10%, preferably within 5%. Therefore, it is important to make fine particles close to a true sphere that can be weight-sorted by a sieve with a particle size of 0.1 to 1.0 mmφ. However, the conventional method has a problem that it is difficult to obtain gallium fine particles having a regular spherical shape.
【０００３】一般に、ガリウムなどの低融点金属の微粒
子を製造する方法としては、滴下法やアトマイズ法など
が一般的であり、また、短く切断した金属細線を加熱帯
に落下させ、加熱溶融して球状化した後に冷却する方法
なども知られている。滴下法は目的金属の溶湯を小孔な
いしノズルから空気、アルゴンガス等の冷媒ガス中に滴
下し、あるいは水、油等の冷却液中に滴下して粒状化す
る方法であるが、ガリウムなどの低融点金属は、冷却ガ
ス中に滴下する方法では滴下中に十分な温度差が確保で
きないために固化せず、液体窒素などで強制的に冷却し
ても糸状になり、微粒子にならない。Generally, as a method for producing fine particles of a low melting point metal such as gallium, a dropping method or an atomizing method is generally used. Further, a thin metal wire cut into short pieces is dropped into a heating zone and heated and melted. A method of cooling after spheroidizing is also known. The dropping method is a method in which a molten metal of the target metal is dropped into a refrigerant gas such as air or argon gas through a small hole or a nozzle, or is dropped into a cooling liquid such as water or oil to granulate. The low-melting-point metal does not solidify because a sufficient temperature difference cannot be secured during the dropping by the method of dropping it in the cooling gas, and even if it is forcibly cooled by liquid nitrogen or the like, it becomes a filament and does not become fine particles.
【０００４】また、冷却液に滴下する方法では、溶湯が
液面に衝突した際に変形してフレーク状になり、球形の
整った微粒子を得ることができない。アトマイズ法によ
っても同様に溶湯が衝撃により変形するので球形の整っ
た微粒子を得ることはできない。一方、短く切断した金
属細線を用いる方法でも冷却時の同様な問題がある。さ
らに、上記低融点金属は過冷却の状態になり易いので、
従来の方法では、溶湯が微粒子化されても、その液滴が
冷却媒体中でなかなか固化せず、液滴どうしが接合して
形状が崩れる致命的な問題がある。Further, in the method of dropping in the cooling liquid, when the molten metal collides with the liquid surface, it is transformed into flakes, and it is not possible to obtain fine particles having a regular spherical shape. Similarly, by the atomizing method, the molten metal is deformed by an impact, so that it is not possible to obtain fine particles having a regular spherical shape. On the other hand, the method using a thin metal wire cut into short has the same problem during cooling. Furthermore, since the low melting point metal is likely to be undercooled,
In the conventional method, there is a fatal problem that even if the molten metal is made into fine particles, the liquid droplets are not solidified in the cooling medium, and the liquid droplets are bonded to each other to lose the shape.
【０００５】本発明は従来の製造方法における上記問題
を解決した低融点金属粒の製造手段を提供することを目
的とする。本発明者等は、低融点金属の溶湯を冷却媒体
中に押出して冷却する際に、超音波振動を与えることに
より、金属粒の相転移を促して固化させることが有効で
あることを見出した。過冷却の状態の物質に衝撃を与え
ると急激に低温相に転移する一般的な現象は知られてい
るが、従来の低融点金属粒の製造方法では、過冷却の問
題から解決手段を検討したものは知られていない。本発
明は従来の製造方法では看過されていた観点から問題を
解決したものであって、本発明によれば、球形の整った
微小な低融点金属粒を容易に製造することができる。An object of the present invention is to provide a means for producing low melting point metal particles which solves the above problems in the conventional production method. The present inventors have found that when a low melting metal melt is extruded into a cooling medium and cooled, it is effective to accelerate the phase transition of the metal particles and solidify them by applying ultrasonic vibration. . It is known that a general phenomenon in which a substance in a supercooled state is rapidly transformed into a low-temperature phase when it is impacted, but in the conventional method for producing low-melting metal particles, a solution to the problem of supercooling was examined. Things are unknown. The present invention solves the problem from the viewpoint that has been overlooked in the conventional manufacturing method. According to the present invention, it is possible to easily manufacture fine low melting point metal particles having a regular spherical shape.
【０００６】[0006]
【課題の解決手段】本発明によれば、以下の低融点金属
粒とその製造方法および製造装置が提供される。 （１）融点が２００℃以下の低融点金属粒であって、平
均粒径が０．１〜１．０mmφ、球形度が０．９５以上で
あることを特徴とする金属粒。 （２）低融点金属の溶湯を冷却液中に押出して金属粒を
製造する方法において、冷却液に超音波振動を与えなが
ら冷却液に挿入したノズルから金属溶湯を押出すことを
特徴とする低融点金属粒の製造方法。 （３）冷却液に超音波振動を与えながら冷却液に挿入し
たノズルからガリウム、水銀またはアマルガムを水中に
押出して金属粒を製造する上記(2) に記載の製造方法。 （４）低融点金属の溶湯を入れる溶湯槽および該金属溶
湯を冷却する冷却液を入れる冷却槽を備え、上記溶湯槽
には溶湯の押出用ノズルおよび加圧手段が設けられ、該
ノズルが冷却液中に挿入される位置に上記溶湯槽が設置
されており、また上記冷却槽には冷却液に超音波振動を
与える振動手段が付設されていることを特徴とする低融
点金属粒の製造装置。According to the present invention, the following low melting point metal particles, a method for manufacturing the same, and a manufacturing apparatus therefor are provided. (1) A low melting point metal particle having a melting point of 200 ° C. or less, an average particle diameter of 0.1 to 1.0 mmφ, and a sphericity of 0.95 or more. (2) In a method for producing metal particles by extruding a molten metal having a low melting point into a cooling liquid, the molten metal is extruded from a nozzle inserted into the cooling liquid while applying ultrasonic vibration to the cooling liquid. Method for producing melting point metal particles. (3) The production method according to (2) above, wherein gallium, mercury or amalgam is extruded into water from a nozzle inserted into the cooling liquid while applying ultrasonic vibration to the cooling liquid to produce metal particles. (4) A molten metal tank for containing a molten metal of a low melting point and a cooling tank for containing a cooling liquid for cooling the molten metal are provided. The molten metal tank is provided with a nozzle for extruding molten metal and a pressurizing means, and the nozzle is cooled. An apparatus for producing low-melting metal particles, characterized in that the molten metal tank is installed at a position to be inserted into a liquid, and the cooling tank is additionally provided with a vibrating means for applying ultrasonic vibration to the cooling liquid. .
【０００７】[0007]
【具体的な説明】本発明は、亜鉛、カドミウム、インジ
ウムなどの合金やハンダ合金などのように融点が２００
℃以下の低融点金属に関し、特に、ガリウム、水銀およ
びこれらのアマルガムの微粒子とその製造に関する。ガ
リウムの融点は約２９．７℃、水銀の融点は約−３８．
９℃であり、これらは従来の製造方法では真球状の微粒
子を得ることができない。[Detailed Description] The present invention has a melting point of 200, such as an alloy of zinc, cadmium, indium, or a solder alloy.
The present invention relates to a low melting point metal having a temperature of ℃ or below, and particularly to gallium, mercury and amalgam fine particles thereof and their production. Gallium has a melting point of about 29.7 ° C. and mercury has a melting point of about −38.
The temperature is 9 ° C., and it is impossible to obtain fine spherical particles by the conventional manufacturing method.
【０００８】本発明は冷却水などの冷却液に超音波振動
を与えた状態で、上記低融点金属の溶湯をノズルから冷
却液中に押出して微粒子化する。溶湯が冷却液の液面に
衝突しないようにノズルの先端は冷却液中に入れ、冷却
液中に溶湯を押出すのが好ましい。溶湯の圧力は溶湯が
冷却液中に流れ出す程度に調整すればよく、具体的には
ノズル径とその長さによって異なるが、概ね０．２〜２
kg／cm2 程度とすればよい。溶湯温度は目的金属の融点
よりやや高い温度で、なおかつ一定に保持されていれば
特に制限はないが、あまり高過ぎると冷却不良となり好
ましくない。冷却液としては水が一般的であるが、水銀
のように融点が極めて低く氷点下のものを冷却する場合
には、冷却液として水を用いると、冷却温度で水が氷結
するためアルコールなどが用いられる。冷却液の温度は
目的金属の融点温度よりも１０℃程度以上低い温度であ
ればよい。具体的には金属が融点２９．７℃のガリウム
である場合には１５℃以下、好ましくは５℃以下の冷却
液が用いられ、また金属が融点−３８．９℃の水銀であ
る場合には−５０℃以下、好ましくは−６０℃以下のア
ルコールが用いられる。According to the present invention, the molten metal of the low melting point metal is extruded from the nozzle into the cooling liquid in the state where ultrasonic vibration is applied to the cooling liquid such as cooling water to form fine particles. It is preferable that the tip of the nozzle is placed in the cooling liquid and the molten metal is extruded into the cooling liquid so that the molten metal does not collide with the liquid surface of the cooling liquid. The pressure of the molten metal may be adjusted so that the molten metal flows into the cooling liquid. Specifically, it varies depending on the nozzle diameter and its length, but is generally 0.2 to 2
It should be about kg / cm 2 . The molten metal temperature is slightly higher than the melting point of the target metal and is not particularly limited as long as it is kept constant, but if it is too high, cooling failure will occur, which is not preferable. Water is generally used as the cooling liquid, but when cooling a substance with an extremely low melting point such as mercury that is below freezing, if water is used as the cooling liquid, water freezes at the cooling temperature, so alcohol is used. To be The temperature of the cooling liquid may be about 10 ° C. or more lower than the melting point of the target metal. Specifically, when the metal is gallium having a melting point of 29.7 ° C., a cooling liquid having a melting point of 15 ° C. or lower, preferably 5 ° C. or lower is used, and when the metal is mercury having a melting point of −38.9 ° C. An alcohol having a temperature of -50 ° C or lower, preferably -60 ° C or lower is used.
【０００９】ガリウムについて、溶湯約３５℃、冷却液
約５℃の条件下で、内径約０．５mmφのステンレス製ノ
ズルを用いて粒径約０．７mmの微粒子が得られ、内径約
０．２mmのノズルでは粒径約０．５mmの微粒子が得られ
る。水銀については、−４０℃のアルコールを用いる場
合に、内径約０．１５mmφのステンレス製ノズルを用い
て粒径約０．４mmの微粒子が得られる。With respect to gallium, fine particles with a particle size of about 0.7 mm were obtained using a stainless steel nozzle with an inner diameter of about 0.5 mmφ under the conditions of a molten metal of about 35 ° C. and a cooling liquid of about 5 ° C., and an inner diameter of about 0.2 mm. Fine particles having a particle size of about 0.5 mm can be obtained with the nozzle of. Regarding mercury, fine particles having a particle size of about 0.4 mm can be obtained by using a stainless nozzle having an inner diameter of about 0.15 mm when alcohol of −40 ° C. is used.
【００１０】本発明の製造方法は、超音波振動を与えな
がら金属溶湯を冷却液に押し出す。超音波の周波数およ
び出力は特に限定されず、例えば、超音波探傷や超音波
洗浄において一般的に使用されているものであれば良
い。一例として、超音波洗浄装置では振動数５０〜１０
０ｋＨｚの超音波振動が常用されている。In the manufacturing method of the present invention, the molten metal is extruded into the cooling liquid while applying ultrasonic vibration. The frequency and output of ultrasonic waves are not particularly limited, and for example, those generally used in ultrasonic flaw detection and ultrasonic cleaning may be used. As an example, the ultrasonic cleaning device has a frequency of 50 to 10
Ultrasonic vibration of 0 kHz is commonly used.
【００１１】以上の方法により得られた本発明の微粒子
は、いずれも平均粒径が０．１〜１．０mmφの、球形度
が０．９５以上のほぼ真球粒子であり、また粒径も比較
的整っておりシャープな粒径分布となる。なお、球形度
（真球度）は、粒子の表面積とその粒子と同じ体積の球
の表面積との比によって定義されるが、便宜的には粒子
断面の最長径R1と最短径R2の比(R2/R1) によって表わさ
れる。球形度が１に近いほど真球となる。また、本発明
の金属粒は表面が平滑であること、表面酸化層が薄いこ
となどの特長をも有する。The fine particles of the present invention obtained by the above method are substantially spherical particles having an average particle diameter of 0.1 to 1.0 mmφ and a sphericity of 0.95 or more, and also have a particle diameter. It is relatively regular and has a sharp particle size distribution. The sphericity (sphericity) is defined by the ratio of the surface area of a particle and the surface area of a sphere having the same volume as that particle, but for convenience, the ratio of the longest diameter R1 and the shortest diameter R2 of the particle cross section ( Represented by R2 / R1). The closer the sphericity is to 1, the more perfect the sphere. Further, the metal particles of the present invention have features such as a smooth surface and a thin surface oxide layer.
【００１２】本発明の製造方法を実施する装置構成を図
１に示す。同図は該装置の概略断面図であり、該装置１
０は金属溶湯１１を貯留する溶湯槽１２と該溶湯１１を
冷却する冷却槽１３を有している。溶湯槽１２の底面に
は溶湯を冷却槽１３に押出すためのノズル１４が設けら
れており、該ノズル１４の先端は槽内の冷却液中に挿入
されている。溶湯槽１２の外周には、所望により金属溶
湯１１の凝固を防止するための加熱装置（図示せず）あ
るいは保温材１６などが設けられ、該溶湯槽内を少なく
とも金属の融点より１０℃以上程度上回る温度に保たれ
る。FIG. 1 shows an apparatus configuration for carrying out the manufacturing method of the present invention. FIG. 1 is a schematic cross-sectional view of the device.
Reference numeral 0 has a molten metal tank 12 that stores a molten metal 11 and a cooling tank 13 that cools the molten metal 11. A nozzle 14 for pushing the molten metal into the cooling tank 13 is provided on the bottom surface of the molten metal tank 12, and the tip of the nozzle 14 is inserted into the cooling liquid in the tank. A heating device (not shown) or a heat insulating material 16 for preventing solidification of the molten metal 11 is provided on the outer periphery of the molten metal tank 12 if desired, and the inside of the molten metal tank is at least 10 ° C. above the melting point of the metal. It is kept above the temperature.
【００１３】冷却槽１３の外壁部には、ノズル１２から
押出された金属粒の過冷却を抑制して固化を促進させる
ための超音波振動器１８が設けられている。該超音波振
動器１８はその振動により液相状態の金属液滴を固相に
転移させる。なお、超音波による振動の他に、冷却液を
撹拌したり、或いは冷却槽を叩くなどして振動を与える
ことも考えられるが、これらの場合には固化する前に金
属液滴が凝集し易いために目的とする平均粒径約０．１
〜１．０mmφの微粒子を得るのが難しい。また、冷却槽
１３には必要に応じて冷却液の冷却手段や、製造した金
属粒の回収手段などが設けられる（いずれも図示せ
ず）。An ultrasonic vibrator 18 for suppressing supercooling of the metal particles extruded from the nozzle 12 and promoting solidification is provided on the outer wall of the cooling tank 13. The ultrasonic vibrator 18 transfers the liquid metal droplets to the solid phase by the vibration. In addition to vibration by ultrasonic waves, vibration may be applied by stirring a cooling liquid or hitting a cooling tank, but in these cases, metal droplets tend to aggregate before solidification. The target average particle size is about 0.1
It is difficult to obtain fine particles of ~ 1.0 mmφ. Further, the cooling tank 13 is provided with a cooling means for cooling liquid, a collecting means for the produced metal particles, etc., if necessary (neither is shown).
【００１４】ノズル１４から冷却液１７に押出された金
属溶湯１１の液滴１５は、容器１２の下方に設けられた
液体冷媒槽１３で冷却される。ノズル１４の先端を冷却
液中に挿入して金属溶湯を押出すことにより、微細な球
形の整った球状粒子１５を形成させることができる。す
なわち、溶湯はノズル先端開口から液中に押出される際
にノズルの内径より僅かに大きい球径に膨らみ、これが
液圧によりノズル先端から切り離されることにより微小
粒となり、液中を沈下する間にほぼ真球に球形化すると
考えられる。なお、低融点金属の場合、ノズルの先端を
冷却液面より高く設置すると、滴下された液滴が液面に
衝突して変形し、その衝撃によりそのまま固化するので
偏平な金属粒となり、真球状の、かつ球形の整った金属
微粒子を得ることができない。Droplets 15 of the molten metal 11 extruded from the nozzle 14 into the cooling liquid 17 are cooled in a liquid refrigerant tank 13 provided below the container 12. By inserting the tip of the nozzle 14 into the cooling liquid and extruding the molten metal, it is possible to form fine spherical particles 15 having a regular spherical shape. That is, when the molten metal is extruded from the nozzle tip opening into the liquid, it swells to a sphere diameter slightly larger than the inner diameter of the nozzle, and when it is separated from the nozzle tip by the liquid pressure, it becomes fine particles, and while it submerges in the liquid. It is considered that the sphere is made almost spherical. In the case of a low melting point metal, if the tip of the nozzle is installed higher than the cooling liquid surface, the dropped liquid droplets collide with the liquid surface and are deformed, and the impact solidifies as it is, resulting in flat metal particles and a true spherical shape. In addition, it is impossible to obtain fine metal particles of spherical shape.
【００１５】[0015]
【実施例】実施例１ 純度９９．９９９％（５Ｎ）の金属ガリウムを図１に示
す装置を用いて下記の条件下で製造したところ、平均粒
径０．５mmφの均質な球状粒子が得られた。このガリウ
ム粒子は球形度９５％以上で表面は滑らかなものであっ
た。 製造条件 溶湯温度：４０℃ 冷却水温度：３℃ ノズル（ステンレス製）内径：０．２mmφ ノズルからの押出圧力：０．５kg／cm2 超音波振動器：超音波洗浄用（振動数：５０〜１００ｋ
Ｈｚ） Example 1 Metallic gallium having a purity of 99.999% (5N) was manufactured using the apparatus shown in FIG. 1 under the following conditions. As a result, homogeneous spherical particles having an average particle diameter of 0.5 mm were obtained. It was The gallium particles had a sphericity of 95% or more and had a smooth surface. Manufacturing conditions Melt temperature: 40 ° C Cooling water temperature: 3 ° C Nozzle (made of stainless steel) Inner diameter: 0.2mmφ Extrusion pressure from nozzle: 0.5kg / cm 2 Ultrasonic vibrator: For ultrasonic cleaning (frequency: 50 ~ 100k
Hz)
【００１６】実施例２ Ｈｇ−Ａｌアマルガム（Ａｌ：１．０％，融点１５０
℃）を図１に示す装置を用いて下記の条件下で製造した
ところ、平均粒径０．４mmφの均質な球状粒子を得た。
この粒子は球形度９５％以上で表面は滑らかなものであ
った。 製造条件 溶湯温度：１８０℃、 冷却水温度：３０℃ ノズル（ステンレス製）内径：０．２mmφ ノズルからの押出圧力：０．３kg／cm2 超音波振動器：超音波洗浄用（振動数：５０〜１００ｋ
Ｈｚ） Example 2 Hg-Al amalgam (Al: 1.0%, melting point 150)
C.) was produced using the apparatus shown in FIG. 1 under the following conditions, and homogeneous spherical particles having an average particle size of 0.4 mm.phi. Were obtained.
The particles had a sphericity of 95% or more and had a smooth surface. Manufacturing conditions Melt temperature: 180 ° C, Cooling water temperature: 30 ° C Nozzle (made of stainless steel) Inner diameter: 0.2mmφ Extrusion pressure from nozzle: 0.3kg / cm 2 Ultrasonic vibrator: For ultrasonic cleaning (frequency: 50 ~ 100k
Hz)
【００１７】比較例 実施例１において超音波を与える代わりに冷却水を撹拌
しながらガリウム溶湯を押出したところ、ガリウムの液
滴は凝集して大粒のボタン状に固化した。超音波振動の
代わりに冷却槽を打撃しても同様であった。また、超音
波振動を与えず、しかも冷却液の攪拌および水槽の打撃
も行わずに溶湯を冷却水中に押し出した場合には、液滴
が水中で暫く固化せず、付近の液滴が集合して大粒の金
属粒になることが確認された。 Comparative Example In Example 1, when the molten gallium was extruded while stirring the cooling water instead of applying ultrasonic waves, the gallium droplets aggregated and solidified into a large button-like shape. The same was true when the cooling tank was hit instead of ultrasonic vibration. Also, when the molten metal is extruded into the cooling water without applying ultrasonic vibration, stirring the cooling liquid, and striking the water tank, the droplets do not solidify in the water for a while, and nearby droplets collect. It was confirmed that it became large metal particles.
【００１８】[0018]
【発明の効果】本発明の製造手段によれば、ガリウム、
水銀、アマルガムなどの低融点金属について、平均粒径
０．１〜１．０mmφの真球状の金属粒が得られる。この
金属粒をフルイにかけると任意の球径の整ったほぼ真球
の粒子が得られるので重量バラツキの極めて小さい金属
粒となり、精密な用途に用いることができる。また本発
明の製造方法は装置構成が簡単であり、容易に実施でき
ると共に連続して多数の均一な金属微粒子を製造するこ
とができる。According to the manufacturing means of the present invention, gallium,
For low melting point metals such as mercury and amalgam, true spherical metal particles having an average particle diameter of 0.1 to 1.0 mm can be obtained. When the metal particles are sieved, almost spherical particles having an arbitrary spherical diameter can be obtained. Therefore, the metal particles have extremely small variation in weight and can be used for precise applications. Further, the production method of the present invention has a simple apparatus configuration, can be easily implemented, and can continuously produce a large number of uniform metal fine particles.
【図１】 本発明方法を実施する装置の一例を概略的に
示した断面図。FIG. 1 is a sectional view schematically showing an example of an apparatus for carrying out the method of the present invention.
１０…滴下装置、１１…金属溶湯、１２…溶湯槽、１３
…冷却槽、１４…ノズル、１５…金属粒、１６…保温
材，１７…冷却液、１８…超音波振動器10 ... Dripping device, 11 ... Metal melt, 12 ... Molten tank, 13
... Cooling tank, 14 ... Nozzle, 15 ... Metal particles, 16 ... Heat insulating material, 17 ... Cooling liquid, 18 ... Ultrasonic vibrator
Claims (4)
って、平均粒径が０．１〜１．０mmφ、球形度が０．９
５以上であることを特徴とする金属粒。1. Low melting point metal particles having a melting point of 200 ° C. or less, having an average particle size of 0.1 to 1.0 mmφ and a sphericity of 0.9.
Metal particles characterized by being 5 or more.
金属粒を製造する方法において、冷却液に超音波振動を
与えながら冷却液に挿入したノズルから金属溶湯を押出
すことを特徴とする低融点金属粒の製造方法。2. A method for producing metal particles by extruding a molten metal of a low melting point metal into a cooling liquid, wherein the molten metal is extruded from a nozzle inserted into the cooling liquid while applying ultrasonic vibration to the cooling liquid. A method for producing low melting metal particles.
液に挿入したノズルからガリウム、水銀またはアマルガ
ムを水中に押出して金属粒を製造する請求項２に記載の
製造方法。3. The production method according to claim 2, wherein gallium, mercury or amalgam is extruded into water from a nozzle inserted in the cooling liquid while applying ultrasonic vibration to the cooling liquid to produce metal particles.
該金属溶湯を冷却する冷却液を入れる冷却槽を備え、上
記溶湯槽には溶湯の押出用ノズルおよび加圧手段が設け
られ、該ノズルが冷却液中に挿入される位置に上記溶湯
槽が設置されており、また上記冷却槽には冷却液に超音
波振動を与える振動手段が付設されていることを特徴と
する低融点金属粒の製造装置。4. A molten metal tank for containing a molten metal of a low melting point and a cooling tank for containing a cooling liquid for cooling the molten metal, wherein the molten metal tank is provided with a nozzle for extruding molten metal and a pressurizing means. The molten metal tank is installed at a position where is inserted into the cooling liquid, and the cooling tank is provided with a vibrating means for applying ultrasonic vibration to the cooling liquid. Manufacturing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7158734A JP2985738B2 (en) | 1995-06-01 | 1995-06-01 | Low-melting-point metal particles, method for manufacturing the same, and manufacturing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7158734A JP2985738B2 (en) | 1995-06-01 | 1995-06-01 | Low-melting-point metal particles, method for manufacturing the same, and manufacturing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08325603A true JPH08325603A (en) | 1996-12-10 |
| JP2985738B2 JP2985738B2 (en) | 1999-12-06 |
Family
ID=15678171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7158734A Expired - Fee Related JP2985738B2 (en) | 1995-06-01 | 1995-06-01 | Low-melting-point metal particles, method for manufacturing the same, and manufacturing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2985738B2 (en) |
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|---|---|---|---|---|
| CN111266595A (en) * | 2020-03-27 | 2020-06-12 | 成都中建材光电材料有限公司 | Gallium particle preparation device and preparation method |
| CN111659897A (en) * | 2020-06-23 | 2020-09-15 | 楚雄川至电子材料有限公司 | Production process method of high-purity gallium particles |
| CN113500197A (en) * | 2021-06-08 | 2021-10-15 | 先导薄膜材料（广东）有限公司 | Indium particle preparation device and method |
| CN114643363A (en) * | 2022-03-15 | 2022-06-21 | 先导薄膜材料（广东）有限公司 | Indium particle preparation device and method |
| CN115815589A (en) * | 2022-12-26 | 2023-03-21 | 株洲科能新材料股份有限公司 | High-purity gallium particle rapid forming method |
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1995
- 1995-06-01 JP JP7158734A patent/JP2985738B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266595A (en) * | 2020-03-27 | 2020-06-12 | 成都中建材光电材料有限公司 | Gallium particle preparation device and preparation method |
| CN111659897A (en) * | 2020-06-23 | 2020-09-15 | 楚雄川至电子材料有限公司 | Production process method of high-purity gallium particles |
| CN111659897B (en) * | 2020-06-23 | 2021-07-06 | 楚雄川至电子材料有限公司 | A kind of high-purity gallium particle production process method |
| CN113500197A (en) * | 2021-06-08 | 2021-10-15 | 先导薄膜材料（广东）有限公司 | Indium particle preparation device and method |
| CN114643363A (en) * | 2022-03-15 | 2022-06-21 | 先导薄膜材料（广东）有限公司 | Indium particle preparation device and method |
| CN114643363B (en) * | 2022-03-15 | 2024-04-05 | 先导薄膜材料（广东）有限公司 | Indium particle preparation device and method |
| CN115815589A (en) * | 2022-12-26 | 2023-03-21 | 株洲科能新材料股份有限公司 | High-purity gallium particle rapid forming method |
| CN115815589B (en) * | 2022-12-26 | 2024-11-12 | 株洲科能新材料股份有限公司 | A rapid prototyping method for high-purity gallium particles |
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| Publication number | Publication date |
|---|---|
| JP2985738B2 (en) | 1999-12-06 |
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