CN104959621A - Preparation method and device of metallic particle - Google Patents
Preparation method and device of metallic particle Download PDFInfo
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- CN104959621A CN104959621A CN201510472614.4A CN201510472614A CN104959621A CN 104959621 A CN104959621 A CN 104959621A CN 201510472614 A CN201510472614 A CN 201510472614A CN 104959621 A CN104959621 A CN 104959621A
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Abstract
The invention provides a preparation method of metallic particles. According to the preparation method, through the direct dropping of molten liquid drops into forming oil, the molten liquid drops are formed in the oil. On the one hand, the complicacy of instruments due to forming in insert gas environment is avoided, on the other hand, according to the preparation method of the metallic particles, through selection of the density of the forming oil and the temperature of the oil, the prepared metallic particles are not oxidized, and meanwhile the prepared metallic particles are epigranular spherical particles.
Description
Technical field
The granulation field of metallic particles of the present invention, particularly relates to a kind of preparation method and device thereof of metallic particles.
Background technology
Along with the fast development of science and technology, the purposes of metallic particles is more and more extensive, and the industry being widely used in electronic semi-conductor, solder as indium and alloy thereof and need filling metal is for tooled joint.
At present, the method of metal granulation mainly contains molten drop method, splashing method and casting die, and for the low and oxidizable metal of fusing point, usually adopt molten drop method, molten drop method mainly comprises the fusing of metal, the operation such as instil and condensation is shaping, as publication number CN 1431073A, the preparation method that denomination of invention is non-oxidation tin ball particle and the patent of forming machine used, by preventing metallic particles to be oxidized with inert gas gas shield in drop dispersion and pre-contraction process, then the oil bath pre-shrunk i.e. molten drop instillation density being greater than 1 cools, prepare the tin ball particle of unoxidized surface-brightening, but, the method needs inert gas shielding, make Granulation Equipments more complicated, and it is bad and have the generation of particle disjunctor phenomenon by particle sphericity that this legal system is standby.
Summary of the invention
In view of this, technical problem to be solved by this invention is the preparation method and the device thereof that provide a kind of metallic particles, metallic particles good sphericity prepared by preparation method provided by the invention, and the device realizing preparation method used is simple.
The invention provides a kind of preparation method of metallic particles, comprising:
1) by metal molten, the metal of melting is obtained;
2) metal of melting is instilled in shaping oil shaping, obtains shaping molten drop,
The density of described shaping oil is less than 1g/mL,
The temperature of described shaping oil is higher than the fusing point of described metal;
3) shaping molten drop enters into cold oil and cools, and obtains metallic particles.
Preferably, described metal is simple metal or alloy,
The fusing point of described simple metal is less than or equal to 180 DEG C;
The fusing point of described alloy is less than or equal to 180 DEG C.
Preferably, described simple metal is indium or tin;
Described alloy is tin-indium alloy, indium sn-bi alloy or bismuth cadmium alloy.
Preferably, the density of described cold oil is less than 1g/mL.
Preferably, the temperature of described cold oil is 0 ~ 50 DEG C.
Preferably, the height that the metal of described melting falls along gravity direction in described shaping oil is 20 ~ 100mm.
Preferably, the height that described shaping molten drop falls along gravity direction in described cold oil is 800 ~ 1500mm.
Present invention also offers a kind of device preparing metallic particles, comprising:
Melt device,
The liquid-drop machine be connected with melt device discharging opening;
Cooler below liquid-drop machine;
Described cooler is provided with shaping oil reservoir and cooling oil reservoir;
Described shaping oil reservoir is placed in the top of cooling oil reservoir;
The discharging opening of described liquid-drop machine contacts with described shaping oil reservoir.
Preferably, the outside of described shaping oil reservoir is provided with heater.
Preferably, the height of described shaping oil reservoir is 20 ~ 100mm.
Compared with prior art, the invention provides a kind of preparation method of metallic particles, preparation method provided by the invention, by the drop of melting is directly instilled in shaping oil, make it shaping in oil, avoid on the one hand the loaded down with trivial details of shaping brought instrument in an inert atmosphere, and, the present invention is by selecting the density of shaping oil and the temperature of oil, make the metallic particles for preparing not only not oxidized, and be even-grained spheric granules, experimental result shows, surface of metal particles light prepared by the present invention, and out-of-roundness is less than 0.2mm.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram preparing metallic particles;
Fig. 2 is the photo of indium stannum alloy particle prepared by embodiment 1.
Detailed description of the invention
The invention provides a kind of preparation method of metallic particles, comprising:
1) by metal molten, the metal of melting is obtained;
2) metal of melting is instilled in shaping oil shaping, obtains shaping molten drop,
The density of described shaping oil is less than 1g/mL,
The temperature of described shaping oil is higher than the fusing point of described metal;
3) shaping molten drop enters into cold oil and cools, and obtains metallic particles.
According to the present invention, the present invention, by metal molten, obtains the metal of melting, and wherein, metal of the present invention is simple metal or alloy; Described simple metal is preferably the simple metal of fusing point (m.p.)≤180 DEG C, is more preferably the simple metal of 20 DEG C≤m.p.≤160 DEG C, most preferably is the simple metal of 40 DEG C≤m.p.≤150 DEG C, most preferably is indium or tin; Described alloy is preferably the alloy of fusing point (m.p.)≤180 DEG C, is more preferably the alloy of 20 DEG C≤m.p.≤160 DEG C, most preferably is the alloy of 40 DEG C≤m.p.≤150 DEG C, most preferably is tin-indium alloy, indium sn-bi alloy or bismuth cadmium alloy.
According to the present invention, the metal of melting instills in shaping oil shaping by the present invention, obtains shaping molten drop.Wherein, the mode of the present invention to instillation is not particularly limited, and well known to a person skilled in the art instillation mode; Preferably, the present invention preferably uses liquid-drop machine to be added dropwise to shaping oil by motlten metal of the present invention from the liquid outlet of liquid-drop machine, and the liquid outlet of described liquid-drop machine contacts with shaping oil phase; Shaping oil of the present invention is preferably the ready-mixed oil that density is less than 1g/mL; The temperature of described shaping oil is preferably the fusing point 5 ~ 30 DEG C higher than described metal, is more preferably the fusing point 10 ~ 20 DEG C higher than described metal, most preferably is higher than described melting point metal 12 ~ 15 DEG C; Wherein, the fusing point of metal refers to the fusing point of metal under normal pressure.The height that the metal of described melting falls along gravity direction in described shaping oil is preferably 20 ~ 50mm, is more preferably 25 ~ 40mm, most preferably is 30 ~ 35mm.
According to the present invention, shaping molten drop also joins in cold oil and cools by the present invention, obtains metallic particles.Wherein, the temperature of described cold oil is preferably 0 ~ 50 DEG C, is more preferably 10 ~ 40 DEG C, most preferably is 20 ~ 30 DEG C; The kind of the present invention to cold oil is not particularly limited, cold oil well known in the art, and the present invention is preferably the oil that density is less than 1g/mL, and more preferably density is less than the edible blend oil of 1g/mL; The height that described shaping molten drop falls along gravity direction in described cold oil is preferably 800 ~ 1500mm, is more preferably 900 ~ 1400mm, most preferably is 1000 ~ 1300mm.
The preparation method of metallic particles provided by the invention, by the drop of melting is directly instilled in shaping oil reservoir, make it shaping in oil, avoid on the one hand the loaded down with trivial details of shaping brought instrument in an inert atmosphere, and, the present invention, by selecting the density of oil and the temperature of oil in shaping oil reservoir, makes the metallic particles prepared not only not have oxidized, and is even-grained spheric granules.
Present invention also offers a kind of device preparing metallic particles, comprising:
Melt device,
The liquid-drop machine be connected with melt device discharging opening;
Cooler below liquid-drop machine;
Described cooler is provided with shaping oil reservoir and cooling oil reservoir;
Described shaping oil reservoir is placed in the top of described cooling oil reservoir,
The discharging opening of described liquid-drop machine contacts with described shaping oil reservoir.
Wherein, the cooling of conveniently shaping molten drop, described shaping oil reservoir and described cooling oil reservoir are preferably arranged in same container by the present invention, and make described shaping oil reservoir be placed in the top of described cooling oil reservoir.Wherein, the height of described shaping oil reservoir is preferably 20 ~ 100mm, is more preferably 30 ~ 80mm, most preferably is 40 ~ 60mm; The height of described cooling oil reservoir is preferably 800 ~ 1500mm, is more preferably 900 ~ 1400mm, most preferably is 1000 ~ 1300mm.
According to the present invention, the present invention is preferably also provided with heater in the outside of described shaping oil reservoir.
And in order to make the controlled diameter of the metallic particles prepared, the diameter of the preferred described liquid-drop machine discharging opening of the present invention and ratio 1:(3 ~ 4 of required metallic particles diameter).
Concrete, as shown in Figure 1, Fig. 1 is the device schematic diagram preparing metallic particles to the device preparing metallic particles of the present invention; Wherein, 1 be melt device, 2 be liquid-drop machine, 3 be cooler, 4 for shaping oil reservoir, 5 is cooling oil reservoir, the melt device be connected with liquid-drop machine charging aperture exports 6, the liquid-drop machine contacted with shaping oil reservoir 4 exports 7, the heater 8 of melt device arranged outside, the heater 9 outside liquid-drop machine 2 and shaping oil reservoir.
Wherein, the effect of described melt device 1 makes metal molten, and the effect of liquid-drop machine 2 is that the convert metals of melting is become drop; Be provided with shaping oil reservoir 4 and cooling oil reservoir 5 in described cooler 3, wherein, the effect of shaping oil reservoir 4 is that the drop that liquid-drop machine 2 is oozed is converted into shaping drop, and the effect of cooling layer 5 makes shaping drop cooling.
The device preparing metallic particles provided by the invention, by adopting shaping oil reservoir to make motlten metal shaping, compared with shaping with in inert gas, greatly reduce the requirement of device, and by metallic particles good sphericity prepared by device of the present invention, can not disjunctor be there is.
Technical scheme below in conjunction with the embodiment of the present invention is clearly and completely described, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
The preparation of indium stannum alloy particle
In cooler 3, add the gold dragon fish ready-mixed oil that density is less than 1, and the shaping oil reservoir height in heater 9 is 20mm, the height of cooling oil reservoir 5 is 800mm; Heater 9, constant temperature 160 DEG C; (proportioning is Sn48%In52% to take 2 kilograms of indium stannum alloys, alloy melting point 118 DEG C) put into melt device 1, heater 8, temperature controls at 150 DEG C, treat that material melts constant temperature half an hour completely again, enter liquid-drop machine 2 by discharging opening 6, maintain alloy liquid level 35mm, discharging opening 7 bore 0.8mm, discharging opening 7 just contacts with liquid level; Just constantly there is molten drop to flow in the ready-mixed oil of cooler 3 and form ball particle, take out cleaning, dry, obtain indium stannum alloy particle.
Detect alloying pellet prepared by embodiment, result shows, its granularity is about 3mm, and out-of-roundness is less than 0.2mm.
Fig. 2 is the photo of indium stannum alloy particle prepared by embodiment 1, and as can be seen from Figure 2, particle surface light prepared by preparation method provided by the invention, does not have oxidized, and uniform particles.
Embodiment 2
The preparation of indium particle
In cooler 3, add the gold dragon fish ready-mixed oil that density is less than 1, and the shaping oil reservoir height in heater 9 is 30mm, the height of cooling oil reservoir 5 is 1500mm; Heater 9, constant temperature 190 DEG C; Take 2 kilograms of indium metal and put into melt device 1, heater 8, temperature controls at 190 DEG C, treat that material melts constant temperature half an hour completely again, enter liquid-drop machine 2 by discharging opening 6, maintain alloy liquid level 35mm, discharging opening 7 bore 0.8mm, discharging opening 7 just contacts with liquid level; Just constantly there is molten drop to flow in the ready-mixed oil of cooler 3 and form ball particle, take out cleaning, dry, obtain indium particle.
Detect indium particle prepared by embodiment, result shows, its granularity is about 3mm, and out-of-roundness is less than 0.2mm.
Embodiment 3
The preparation of indium sn-bi alloy particle
In cooler 3, add the gold dragon fish ready-mixed oil that density is less than 1, and the shaping oil reservoir height in heater 9 is 25mm, the height of cooling oil reservoir 5 is 800mm; Heater 9, constant temperature 96 DEG C; (proportioning is Bi57%Sn17%In26% to take 2 kilograms of indium sn-bi alloy, alloy melting point 79 DEG C) put into melt device 1, heater 8, temperature controls at 100 DEG C, treat that material melts constant temperature half an hour completely again, enter liquid-drop machine 2 by discharging opening 6, maintain alloy liquid level 35mm, discharging opening 7 bore 1.2mm, discharging opening 7 just contacts with liquid level; Just constantly there is molten drop to flow in the ready-mixed oil of cooler 3 and form ball particle, take out cleaning, dry, obtain indium sn-bi alloy particle.
Detect indium sn-bi alloy particle prepared by embodiment, result shows, its about granularity 5mm, and out-of-roundness is less than 0.2mm, surface-brightening.
Embodiment 4
The preparation of bismuth cadmium alloy particle
In cooler 3, add the gold dragon fish ready-mixed oil that density is less than 1, and the shaping oil reservoir height in heater 9 is 35mm, the height of cooling oil reservoir 5 is 1400mm; Heater 9, constant temperature 165 DEG C; (proportioning is Bi60%Cd40% to take 2 kilograms of bismuth cadmium alloys, alloy melting point 144 DEG C) put into melt device 1, heater 8, temperature controls at 170 DEG C, treat that material melts constant temperature half an hour completely again, enter liquid-drop machine 2 by discharging opening 6, maintain alloy liquid level 30mm, discharging opening 7 bore 1.0mm, discharging opening 7 just contacts with liquid level; Just constantly there is molten drop to flow in the ready-mixed oil of cooler 3 and form ball particle, take out cleaning, dry, obtain bismuth cadmium alloy particle.
Detect bismuth cadmium alloy particle prepared by embodiment, result shows, its about granularity 4mm, and out-of-roundness is less than 0.2mm, surface-brightening.
The explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a preparation method for metallic particles, comprising:
1) by metal molten, the metal of melting is obtained;
2) metal of melting is instilled in shaping oil shaping, obtains shaping molten drop,
The density of described shaping oil is less than 1g/mL,
The temperature of described shaping oil is higher than the fusing point of described metal;
3) shaping molten drop enters into cold oil and cools, and obtains metallic particles.
2. preparation method according to claim 1, is characterized in that, described metal is simple metal or alloy,
The fusing point of described simple metal is less than or equal to 180 DEG C;
The fusing point of described alloy is less than or equal to 180 DEG C.
3. preparation method according to claim 2, is characterized in that, described simple metal is indium or tin;
Described alloy is tin-indium alloy, indium sn-bi alloy or bismuth cadmium alloy.
4. preparation method according to claim 1, is characterized in that, the density of described cold oil is less than 1g/mL.
5. preparation method according to claim 1, is characterized in that, the temperature of described cold oil is 0 ~ 50 DEG C.
6. preparation method according to claim 1, is characterized in that, the height that the metal of described melting falls along gravity direction in described shaping oil is 20 ~ 100mm.
7. preparation method according to claim 1, is characterized in that, the height that described shaping molten drop falls along gravity direction in described cold oil is 800 ~ 1500mm.
8. prepare a device for metallic particles, comprising:
Melt device,
The liquid-drop machine be connected with melt device discharging opening;
Cooler below liquid-drop machine;
Described cooler is provided with shaping oil reservoir and cooling oil reservoir;
Described shaping oil reservoir is placed in the top of cooling oil reservoir;
The discharging opening of described liquid-drop machine contacts with described shaping oil reservoir.
9. device according to claim 8, is characterized in that, the outside of described shaping oil reservoir is provided with heater.
10. preparation method according to claim 8, is characterized in that, the height of described shaping oil reservoir is 20 ~ 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510472614.4A CN104959621A (en) | 2015-08-04 | 2015-08-04 | Preparation method and device of metallic particle |
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| CN201510472614.4A CN104959621A (en) | 2015-08-04 | 2015-08-04 | Preparation method and device of metallic particle |
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| CN201510472614.4A Pending CN104959621A (en) | 2015-08-04 | 2015-08-04 | Preparation method and device of metallic particle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106735265A (en) * | 2016-11-17 | 2017-05-31 | 安顺市虹翼特种钢球制造有限公司 | Method for processing steel ball |
| CN111054931A (en) * | 2020-03-05 | 2020-04-24 | 郑州轻工业大学 | Ball preparation system for ball bearing and control method thereof |
| CN112170831A (en) * | 2020-09-29 | 2021-01-05 | 广东先导稀材股份有限公司 | Metal needle or metal particle production equipment |
| 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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735265A (en) * | 2016-11-17 | 2017-05-31 | 安顺市虹翼特种钢球制造有限公司 | Method for processing steel ball |
| CN111054931A (en) * | 2020-03-05 | 2020-04-24 | 郑州轻工业大学 | Ball preparation system for ball bearing and control method thereof |
| CN111054931B (en) * | 2020-03-05 | 2023-09-29 | 郑州轻工业大学 | Ball preparation system for ball bearing and control method thereof |
| CN112170831A (en) * | 2020-09-29 | 2021-01-05 | 广东先导稀材股份有限公司 | Metal needle or metal particle production equipment |
| 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 |
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Application publication date: 20151007 |