CN107570713A - A kind of high-frequency impulse pressure differential method prepares the method and device of spherical metal powder - Google Patents
A kind of high-frequency impulse pressure differential method prepares the method and device of spherical metal powder Download PDFInfo
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- CN107570713A CN107570713A CN201710437955.7A CN201710437955A CN107570713A CN 107570713 A CN107570713 A CN 107570713A CN 201710437955 A CN201710437955 A CN 201710437955A CN 107570713 A CN107570713 A CN 107570713A
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- crucible
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Abstract
The present invention utilizes the mutual cooperation of mechanical pump, piezoelectric ceramics and air-vent cap, so that vacuum chamber epicoele and cavity of resorption produce draught head, the liquid material in crucible is extruded into crucible bottom aperture using draught head, spherical droplets are formed under gravity and surface tension effects, and the cooled and solidified in dropping process, eventually fall into collector, for low melting material or materials with high melting point, size uniformity can be prepared, the high spherical powder of sphericity, different to the fitness of different crucibles according to various materials, the different crucibles that can also arrange in pairs or groups are used.Method is simply controllable, energy consumption is low, efficiency high.
Description
Technical field
The invention belongs to technical field prepared by spherical metal powder, more particularly to a kind of high-frequency impulse pressure differential method prepares gold
Belong to the method and device of spherical powder.
Background technology
Spherical powder is often referred to size between nanometer to the particulate between millimeter, and grain shape is spherical, due to its chi
Very little and performance the property of can not be substituted, spherical powder are commonly applied to solar cell, semiconductor integrated circuit, Electronic Packaging, precision
The fields such as manufacture, chemical catalysis, raw body material.To meet all requirements, to powder on dimensional homogeneity and spherical circularity
All have high requirements.
Common method has both at home and abroad at present：1) remelting process, raw material is made after filament and is cut into the method for mechanical shearing
Even segment, the deep fat that segment is immersed to proper temperature are allowed to after melting, being frozen into spheroidal particle, then screened, cleaning, inspection
Obtain powder.This method principle is simple, but requires high to the accuracy of manufacture, and is processed for the poor material of small particle or plasticity
Difficulty, and production efficiency is low；2) atomization, atomization mainly uses method for industrialization, such as gas atomization, centrifugal atomizing
Method, vacuum atomization etc., by liquid material high-speed gas atomization into small drop, by cooled and solidified globulate powder,
This method efficiency is higher, and application is wider, but its powder size prepared is difficult to control, and spherical property uniform in size is poor and satellite be present
Ball etc. is normality；3) uniform droplet spray, by the way that in the foraminate crucible of bottom belt, melting sources are passed through into certain frequency
Vibration-extrusion liquid material is extruded from crucible bottom aperture and forms liquid bead, liquid bead is cold in descent
But the spherical powder of size uniformity is frozen into, spherical powder size uniform prepared by this method, quality is good, but must in preparation process
The liquid material stability in crucible must can be caused necessarily to influence by the way of vibration-extrusion, it is former in particular with liquid
Material is reduced, and its stability can be worse and worse.
High-frequency impulse pressure differential method of the present invention prepares spherical metal powder, and obtained spherical powder size uniform, sphericity is high,
And preparation process does not interfere with the stability of crucible interior liquid raw material.
The content of the invention
The invention solves technical barrier be to prepare size uniform using high-frequency impulse pressure differential method, high spherical of sphericity
Powder, method can be applied to low melting material and materials with high melting point simultaneously.
The technical solution adopted by the present invention is：Utilize the phase interworking of mechanical pump (3), piezoelectric ceramics (7) and air-vent cap (6)
Close so that vacuum chamber epicoele (12) and cavity of resorption (19) generation draught head, using draught head by the liquid material (1) in crucible (15)
Crucible (15) small hole at bottom part is extruded, spherical droplets (16) are formed under gravity and surface tension effects, and it is cold in dropping process
But solidify, eventually fall into collector (11), it is concretely comprised the following steps：
Vent valve (8) is opened, opens door (17), collector (11) is put into immediately below crucible (15), closes door
(17), open upper shell (13) raw material crushed is fitted into crucible (15), charge weight is no more than the 2/ of crucible (15) volume
3, upper shell (13) is closed, closes vent valve (8)；Low vacuum 1Pa will be extracted into storehouse with mechanical pump (10), then with diffusion pump (9)
High vacuum 0.001Pa will be extracted into storehouse, high purity inert gas is passed through by intake valve (5) so that storehouse inside and outside air pressure balance, closed
Intake valve (5)；Energization makes sensing heater (2) work, and is heated to crucible (15) interior melting sources, keeps heating-up temperature to remain former
The liquid condition of material；Valve (4) is closed, mechanical pump (3) is opened, the gas in cavity of resorption (19) is taken out toward epicoele (12) direction, together
When give piezoelectric ceramics (7) to apply specific pulse signal, piezoelectric ceramics (7) enters in pulse signal effect lower band port lid (6) of taking offence
Row high frequency folding, gas in cavity of resorption (19) is put into epicoele (12) by given frequency, under differential pressure action, liquid material (1) is logical
Cross crucible (15) small hole at bottom part extrusion and spherical droplets (16) are formed under gravity and surface tension effects, spherical droplets (16) exist
Solidified in dropping process and fall into collector (11)；After collection terminates, sensing heater (2) is closed, mechanical pump (3) is closed, beats
Valve opening door (4), vent valve (8) is opened, open door (17), put back to collector (11) after taking out spherical powder, close door
(17) vent valve (8), is closed, low vacuum 1Pa will be extracted into storehouse with mechanical pump (10), then height will be extracted into storehouse with diffusion pump (9)
Vacuum 0.001Pa, holding meanss inner vacuum state.
The feature for preparing the device of spherical metal powder is：Device case is made up of upper shell (13) and lower house (18),
Door (17) is installed, space in storehouse is divided into epicoele (12) and cavity of resorption (19), earthenware by storehouse inner route clapboard (14) on lower house (18)
Crucible (15) is arranged among dividing plate (14), and installation sensing heater (2) outside crucible (15), crucible (15) underface installation is collected
Device (11), epicoele (12) and cavity of resorption (19) are connected by pipeline (20) and pipeline (21), and pipeline is provided with mechanical pump on (20)
(3), pipeline (20) exports the air-vent cap (6) of installation connection piezoelectric ceramics (7) in cavity of resorption (19), and pipeline is provided with valve on (21)
(4), while intake valve (5) is also equipped with, mechanical pump (10) and diffusion pump (9) is also equipped with lower house (18), and deflate
Valve (8).
Crucible (15) in the device can be changed according to different service conditions.
The remarkable result of the present invention is for low melting material or materials with high melting point, can prepare size uniformity, ball
The high spherical powder of shape degree, different to the fitness of different crucibles according to various materials, the different crucibles that can also arrange in pairs or groups are used.
Method is simply controllable, energy consumption is low, efficiency high.
Brief description of the drawings
Accompanying drawing 1 is a kind of device for preparing spherical metal powder, (1) liquid material in figure, (2) load coil, (3)
Mechanical pump, (4) valve, (5) intake valve, (6) air-vent cap, (7) piezoelectric ceramics, (8) vent valve, (9) diffusion pump, (10) machinery
Pump, (11) collector, (12) epicoele, (13) upper shell, (14) dividing plate, (15) crucible, (16) spherical droplets, (17) door,
(18) lower house, (19) cavity of resorption, (20) pipeline, (21) pipeline.
Embodiment
Describe the embodiment of this programme in detail with reference to technical scheme and accompanying drawing.
Embodiment 1：The spherical powder of tin is prepared, using graphite crucible.
Vent valve (8) is opened, opens door (17), collector (11) is put into immediately below crucible (15), closes door
(17), open upper shell (13) tin raw material crushed is fitted into crucible (15), charge weight is no more than crucible (15) volume
1/2, upper shell (13) is closed, closes vent valve (8)；Low vacuum 1Pa will be extracted into storehouse with mechanical pump (10), then uses diffusion pump
(9) high vacuum 0.001Pa will be extracted into storehouse, high-purity argon gas is passed through by intake valve (5) so that storehouse inside and outside air pressure balance, closed
Intake valve (5)；Energization makes sensing heater (2) work, and being heated to assigned temperature melts the tin raw material in crucible (15), keeps
Heating-up temperature maintains the liquid condition of tin raw material；Valve (4) is closed, opens mechanical pump (3), by the gas in cavity of resorption (19) up
Chamber (12) direction is taken out, while applies specific pulse signal to piezoelectric ceramics (7), and piezoelectric ceramics (7) is under pulse signal effect
Drive air-vent cap (6) to carry out high frequency folding, gas in cavity of resorption (19) is put into epicoele (12) by given frequency, in differential pressure action
Under, liquid tin raw material (1) is extruded by crucible (15) small hole at bottom part and forms spherical droplets under gravity and surface tension effects
(16), spherical droplets (16) solidify in dropping process and fall into collector (11)；After collection terminates, sensing heater is closed
(2) mechanical pump (3), is closed, opens valve (4), opens vent valve (8), opens door (17), receipts are put back to after taking out spherical powder
Storage (11), door (17) is closed, close vent valve (8), low vacuum 1Pa will be extracted into storehouse with mechanical pump (10), then with spreading
Pump (9) will be extracted into high vacuum 0.001Pa, holding meanss inner vacuum state in storehouse.
Embodiment 2：The spherical powder of copper is prepared, using graphite crucible.
Vent valve (8) is opened, opens door (17), collector (11) is put into immediately below crucible (15), closes door
(17), open upper shell (13) copper raw material crushed is fitted into crucible (15), charge weight is no more than crucible (15) volume
2/3, upper shell (13) is closed, closes vent valve (8)；Low vacuum 1Pa will be extracted into storehouse with mechanical pump (10), then uses diffusion pump
(9) high vacuum 0.001Pa will be extracted into storehouse, high-purity argon gas is passed through by intake valve (5) so that storehouse inside and outside air pressure balance, closed
Intake valve (5)；Energization makes sensing heater (2) work, and being heated to assigned temperature melts the copper raw material in crucible (15), keeps
Heating-up temperature maintains the liquid condition of copper raw material；Valve (4) is closed, opens mechanical pump (3), by the gas in cavity of resorption (19) up
Chamber (12) direction is taken out, while applies specific pulse signal to piezoelectric ceramics (7), and piezoelectric ceramics (7) is under pulse signal effect
Drive air-vent cap (6) to carry out high frequency folding, gas in cavity of resorption (19) is put into epicoele (12) by given frequency, in differential pressure action
Under, liquid copper raw material (1) is extruded by crucible (15) small hole at bottom part and forms spherical droplets under gravity and surface tension effects
(16), spherical droplets (16) solidify in dropping process and fall into collector (11)；After collection terminates, sensing heater is closed
(2) mechanical pump (3), is closed, opens valve (4), opens vent valve (8), opens door (17), receipts are put back to after taking out spherical powder
Storage (11), door (17) is closed, close vent valve (8), low vacuum 1Pa will be extracted into storehouse with mechanical pump (10), then with spreading
Pump (9) will be extracted into high vacuum 0.001Pa, holding meanss inner vacuum state in storehouse.
Claims (3)
1. a kind of method that high-frequency impulse pressure differential method prepares spherical metal powder, it is characterised in that：Utilize mechanical pump（3）, piezoelectricity
Ceramics（7）And air-vent cap（6）Mutual cooperation so that vacuum chamber epicoele（12）And cavity of resorption（19）Draught head is produced, utilizes air pressure
Difference is by crucible（15）Interior liquid material（1）Extrude crucible（15）Small hole at bottom part, ball is formed under gravity and surface tension effects
Shape drop（16）, and the cooled and solidified in dropping process, eventually fall into collector（11）In, it is concretely comprised the following steps：
Open vent valve（8）, open door（17）, it is put into collector（11）In crucible（15）Underface, close door（17）, beat
Open upper shell（13）The raw material crushed is loaded into crucible（15）In, charge weight is no more than crucible（15）The 2/3 of volume, closes
Housing（13）, close vent valve（8）；Use mechanical pump（10）Low vacuum 1Pa will be extracted into storehouse, then uses diffusion pump（9）It will be taken out in storehouse
To high vacuum 0.001Pa, pass through intake valve（5）It is passed through high purity inert gas so that storehouse inside and outside air pressure balance, close intake valve
（5）；Energization makes sensing heater（2）Work, is heated to crucible（15）Interior melting sources, heating-up temperature is kept to maintain the liquid of raw material
State state；Close valve（4）, open mechanical pump（3）, by cavity of resorption（19）In gas toward epicoele（12）Direction is taken out, while to pressure
Electroceramics（7）Apply specific pulse signal, piezoelectric ceramics（7）Taken offence port lid in pulse signal effect lower band（6）Carry out high frequency
Folding, by cavity of resorption（19）Middle gas is put into epicoele by given frequency（12）, under differential pressure action, liquid material（1）Pass through crucible
（15）Small hole at bottom part is extruded and forms spherical droplets under gravity and surface tension effects（16）, spherical droplets（16）Falling
Solidified in journey and fall into collector（11）；After collection terminates, sensing heater is closed（2）, close mechanical pump（3）, open valve
（4）, open vent valve（8）, open door（17）, collector is put back to after taking out spherical powder（11）, close door（17）, close
Vent valve（8）, use mechanical pump（10）Low vacuum 1Pa will be extracted into storehouse, then uses diffusion pump（9）High vacuum will be extracted into storehouse
0.001Pa, holding meanss inner vacuum state.
2. a kind of high-frequency impulse pressure differential method prepares the device of spherical metal powder, it is characterised in that：Device case is by upper shell
（13）And lower house（18）Composition, lower house（18）On door is installed（17）, storehouse inner route clapboard（14）Space in storehouse is divided into
Epicoele（12）And cavity of resorption（19）, crucible（15）Installed in dividing plate（14）Centre, crucible（15）Outside installation sensing heater（2）,
Crucible（15）Underface is installed by collector（11）, epicoele（12）And cavity of resorption（19）Pass through pipeline（20）And pipeline（21）Connection, pipe
Road（20）On mechanical pump is installed（3）, pipeline（20）In cavity of resorption（19）Outlet installation connection piezoelectric ceramics（7）Air-vent cap（6）,
Pipeline（21）On valve is installed（4）, while it is also equipped with intake valve（5）, lower house（18）On be also equipped with mechanical pump（10）
And diffusion pump（9）, and vent valve（8）.
3. a kind of high-frequency impulse pressure differential method as claimed in claim 2 prepares the device of spherical metal powder, it is characterised in that：Earthenware
Crucible（15）It can be changed according to the demand for preparing different metal spherical powder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710437955.7A CN107570713A (en) | 2017-06-12 | 2017-06-12 | A kind of high-frequency impulse pressure differential method prepares the method and device of spherical metal powder |
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| CN201710437955.7A CN107570713A (en) | 2017-06-12 | 2017-06-12 | A kind of high-frequency impulse pressure differential method prepares the method and device of spherical metal powder |
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| CN201710437955.7A Pending CN107570713A (en) | 2017-06-12 | 2017-06-12 | A kind of high-frequency impulse pressure differential method prepares the method and device of spherical metal powder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108465822A (en) * | 2018-05-02 | 2018-08-31 | 朱秀峰 | A kind of preparation method and preparation facilities of globular metallic powder |
| CN108994287A (en) * | 2018-09-29 | 2018-12-14 | 宁波众远新材料科技有限公司 | Vacuum gas-atomized powder equipment self-balancing tonifying Qi pipeline and supplementing method for air |
| CN112496331A (en) * | 2020-11-30 | 2021-03-16 | 佛山市中研非晶科技股份有限公司 | Powder making system with smelting device with porous flow guide pipe structure |
| CN113045186A (en) * | 2019-12-27 | 2021-06-29 | 杭州光学精密机械研究所 | Preparation device and use method of chalcogenide glass ball blank |
| CN116160007A (en) * | 2023-04-24 | 2023-05-26 | 成都佩克斯新材料有限公司 | Gold-tin powder preparation device and preparation method |
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| WO2012123389A1 (en) * | 2011-03-14 | 2012-09-20 | Universite Joseph Fourier | Method and device for forming metallic-glass beads |
| CN103008660A (en) * | 2012-12-21 | 2013-04-03 | 大连理工大学 | Method for preparing shape-controlled core-shell uniform particles |
| CN104096845A (en) * | 2014-07-18 | 2014-10-15 | 大连理工常州研究院有限公司 | Method and device for manufacturing metallic glass particles |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108465822A (en) * | 2018-05-02 | 2018-08-31 | 朱秀峰 | A kind of preparation method and preparation facilities of globular metallic powder |
| CN108465822B (en) * | 2018-05-02 | 2021-05-07 | 山东女子学院 | Preparation method and preparation device of spherical metal powder |
| CN108994287A (en) * | 2018-09-29 | 2018-12-14 | 宁波众远新材料科技有限公司 | Vacuum gas-atomized powder equipment self-balancing tonifying Qi pipeline and supplementing method for air |
| CN113045186A (en) * | 2019-12-27 | 2021-06-29 | 杭州光学精密机械研究所 | Preparation device and use method of chalcogenide glass ball blank |
| CN113045186B (en) * | 2019-12-27 | 2023-06-02 | 杭州长波红外科技有限公司 | Preparation device and application method of chalcogenide glass ball blank |
| CN112496331A (en) * | 2020-11-30 | 2021-03-16 | 佛山市中研非晶科技股份有限公司 | Powder making system with smelting device with porous flow guide pipe structure |
| CN116160007A (en) * | 2023-04-24 | 2023-05-26 | 成都佩克斯新材料有限公司 | Gold-tin powder preparation device and preparation method |
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