CN102041406A - Porous powder and preparation method thereof - Google Patents
Porous powder and preparation method thereof Download PDFInfo
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- CN102041406A CN102041406A CN2009101808946A CN200910180894A CN102041406A CN 102041406 A CN102041406 A CN 102041406A CN 2009101808946 A CN2009101808946 A CN 2009101808946A CN 200910180894 A CN200910180894 A CN 200910180894A CN 102041406 A CN102041406 A CN 102041406A
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Abstract
The invention discloses a preparation method of porous powder, comprising the following steps: melting at least two elements at a blended ratio into a melting liquid with at least two phases; pelleting the melting liquid into powder pellets of at least two phases; and performing acid etching on the powder pellets to cause one of the at least two phases to be corroded and lead the pellets in the corroded phase to extend from the surfaces to the insides to form holes, thus obtaining the porous powder. As for the porous powder prepared by the invention, the surface of each pellet is provided with multiple holes, and the holes extend to the inside of the pellet, thus having high specific surface area, and being applicable to the fields of energy storage, chemical absorption materials or catalysts, and the like.
Description
[technical field]
The present invention refers to a kind of two-phase or polyphase alloy powder and method for making thereof especially about a kind of porous material and method for making thereof, and this powder particle surface is formed with a plurality of from an inner hole that extends of this particle in opposite directions wherein.
[background technology]
Flourish along with the energy and chemical industry industry, characteristic for functional material requires also to improve gradually, porous material is owing to special structure and possess high-specific surface area, therefore at aspects such as energy storage, chemisorbed material, electrode materials, catalyzer, absorption of electromagnetic wave, strainers increasing application is arranged.Porous material comprises pure element, alloy and the compound of various heterogeneities, after being made into the porousness pulverized structure, all represent different characteristics, many purposes of also having derived, be developed and study such as silicon oxide, aluminum oxide, titanium dioxide, zirconium white, various metal and multichip semiconductor permeability powder, and also have the preparation method of multiple porous material to be suggested.
In the method for making the porous metal powder, for example No. 3888657 United States Patent (USP) discloses the method that a kind of heat-treated metal raw material forms pore, this method utilizes spray method to prepare metal-powder, utilize high temperature sintering to become agglomerate this metal-powder again, yet because these agglomerate volumes are bigger, and have the slit between powder, therefore after forming the porousness agglomerate, need again that this agglomerate is levigate to be made into porous particles with ball milling method; No. 1458064 Chinese patent discloses a kind of preparation method with highly active mesothyrid silicon-dioxide powdery, this method is made silica dioxide gel with the silicon ester hydrolysis reaction, form the amorphous silicon di-oxide powder after the drying treatment, after low-temperature heat treatment, make nano silica powder with ball milling method again; No. 6589667 United States Patent (USP) discloses a kind of preparation method of porousness iron powder, this method is with the oxide compound of iron such as magnetite or the rhombohedral iron ore shape of claying into power, be made into slurry with mixing cakingagent in this powder adding solution again, the aggregate that forms after its spraying drying is placed the reducing atmosphere of hydrogen, make iron oxide reduction become metallic iron, again temperature is improved so that powder sinteredly can form porousness iron aggregate.Above-mentioned patent must be again behind preparation porousness powder through polishing to make metal-powder, therefore can increase fabrication steps and make processing procedure speed slow.
The 1083014th European patent discloses a kind of method of making porous metal powder, this method utilizes oxidation reduction process with the metal-powder oxidation that heats up under the environment that contains chlorine, make the metal-powder surface grow the oxide compound of diamond shaped, carrying out heating reduction with hydrogen or carbon monoxide again makes metal oxide be reduced into metal, the hole that stays behind the former one-tenth of oxide compound is made into the porousness powder, but this oxidation reduction process is primarily aimed at the preparation of the metal-powder of copper and copper alloy.No. 2008050237 Japanese Patent discloses a kind of preparation method of ball-shaped porousness carbon dust, this method adds catalyzer with carbon dust and acetaldehyde and carries out polyreaction in the aqueous solution, reaction back solid-liquid separation, after powder taken out drying, be placed on again and carry out 500 to 1000 ℃ of thermal treatments in the rare gas element and make its carbonization, carry out priming reaction at last making the porousness carbon dust, but this method is only applicable to organic materialss such as carbon dust.No. 2005002395 Japanese Patent discloses the method that a kind of two-stage reaction method prepares the porousness nickel powder, this method places oxidizing atmosphere with the compound of nickel earlier, fs is elevated to 300 to 500 ℃ with temperature earlier, subordinate phase rises to 800 to 1300 ℃ again, after treating that the surface generates metal oxide, with reducing atmosphere this oxide compound is reduced again, make the porousness nickel powder, but this method is primarily aimed at the preparation of nickel powder.No. 2007099621 Japanese Patent discloses a kind of preparation method of porous silica powder, this method is heated to 1100 to 1600 ℃ with SiO 2 powder in vacuum or rare gas element, make the generation silica vapor, again this silica vapor is about evaporation on 100 to 400 ℃ the cold body at cold body temperature degree, and control makes it generate specific surface area to be about 5 to 300m
2The porous silica powder of/g, but this method mainly is only applicable to high vapour pressure material.No. 101177296 Chinese patent discloses a kind of preparation method of zinc oxide nano-powder of sheet porous structural, this method places the mixed solution of zinc acetate solution and urea soln in the microwave oven, power in 500 to 900W reacted 30 to 60 minutes down, temperature of reaction is about 60 to 95 ℃, again the gained mixing solutions is separated, washing, dry, to make the precursors of alkaline carbonic acid zinc, again with in 400 to 600 ℃ of following roasts of this precursors, can obtain porous nanometer Zinc oxide powder, but the temperature of reaction of this method is low, thereby may influence resulting vesicular structure.
To sum up, the developing direction of present porous material, focus on more and use the levigate porous material of Ginding process to be made into porous particles, or the preparation of reaching the porousness powder at certain material, but these methods not only increase fabrication steps and cost, also be subject to character and can't be applicable to that other materials replaces for a large amount of systems, and do not have an economic benefit.Therefore, the lifting of porous material production rate and quality control, and even the exploitation of novel porousness powder becomes the important topic of present industry.
[summary of the invention]
For reaching above-mentioned and other purpose, the invention provides a kind of porousness powder, comprise a plurality of particles, this each particle has at least two kinds of elements, and these at least two kinds of elements form at least two kinds of phases, and this each particle surface is formed with the hole that extends internally from one of these at least two kinds of phases.
For obtaining porousness powder of the present invention, the present invention also provides a kind of method of making the porousness powder, comprising: make at least two kinds of ratios be melt into the fused solution with at least two kinds of phases through the element of allotment; This fused solution is granulated into powder particle with at least two kinds of phases; And this powder particle of acid etching, make at least two kinds of corrosion mutually one of in mutually, make this extend to form hole to internal corrosion, to obtain the porousness powder from particle surface.
For reaching purpose of the present invention, the present invention selects at least two kinds of element materials, in specific embodiment, selects two kinds of materials as demonstration.And in the selection of material as long as these at least two kinds elementary composition and ratios in solid solution condition for forming two or more at least different phases, promptly can be used as the material of porousness powder of the present invention.
Because these at least two kinds of elements form two or more different phases, chemically reactive difference each other, therefore can utilize acid solution or other reactive solutions that these at least two kinds of elements are carried out selective reaction, corrode formed one of them phase of these two kinds of elements, on particle surface, to form a plurality of holes.
Moreover the present invention needn't can make the porousness powder by grinding, and has process simplification, produces fast, helps the volume production preparation.In addition, porousness powder of the present invention has two-phase or heterogeneous structure, only have wherein one significant reaction to be arranged with respect to acid solution, but again because of on the material system being homogeneous separator physically mutually, so, a plurality of holes of each particle surface of gained porousness powder are able to uniform distribution, make each particle have high-specific surface area, can be widely used in fields such as energy storage, absorption and catalyzer.
Therefore, the application comprises:
1. porousness powder comprises:
A plurality of particles, this each particle has at least two kinds of elements, and at least two kinds of phases of this at least two kinds of elements formation, and this each particle surface is formed with the hole that extends internally from one of these at least two kinds of phases.
2. as the porousness powder of item 1, wherein, the median size of these a plurality of particles is 0.5 to 500 μ m.
3. as 1 porousness powder, wherein, these at least two kinds of elements independently are selected from the combination of combination, iron and nickel of combination, copper and zinc of combination, copper and magnesium of combination, gold and indium of nickel and silicon or the combination of aluminium and magnesium.
4. as 3 porousness powder, wherein, this nickel and silicon be combined to form pure silicon and nickel disilicide phase.
5. as 3 porousness powder, wherein, this gold and indium be combined to form pure indium and two indium metallographics.
6. as 3 porousness powder, wherein, this copper and magnesium be combined to form pure magnesium and two magnesium copper phases.
7. as the porousness powder of item 4, wherein, this hole is from the nickel disilicide inner extension of this particle in opposite directions.
8. as the porousness powder of item 5, wherein, this hole is from the inner extension of this particle in opposite directions of pure indium.
9. as the porousness powder of item 6, wherein, this hole is from the inner extension of this particle in opposite directions of pure magnesium.
10. method of making the porousness powder comprises:
Make at least two kinds of ratios be melt into fused solution with at least two kinds of phases through the element of allotment;
This fused solution is granulated into powder particle with at least two kinds of phases; And
This powder particle of acid etching makes at least two kinds of corrosion mutually one of in mutually, makes this extend to form hole from particle surface to internal corrosion, to obtain the porousness powder.
11. as the method for item 10, by this fused solution of spray pattern granulation.
12. as the method for item 10, wherein, the median size of this particle is 0.5 to 500 μ m.
13. as 10 method, also be included in this powder particle of acid etching after, remove this porousness powder residual acid.
14. as 13 method, with water or with this sour liquid that neutralizes clean this porousness powder with remove this porousness powder residual acid.
15. as 14 method, also be included in remove after the residual acid, dry this porousness powder.
16. as the method for item 15, wherein, in 80 to 250 ℃ of dryings of this porousness powder 2 to 10 hours.
17. as the method for item 11, wherein, this spray pattern is selected from water spray, gas blowout mist or aqueous vapor unification spraying.
18. as 10 method, wherein, these at least two kinds of elements independently are selected from the combination of combination, iron and nickel of combination, copper and zinc of combination, copper and magnesium of combination, gold and indium of nickel and silicon or the combination of aluminium and magnesium.
19. as 18 method, wherein, this nickel and silicon be combined to form pure silicon and nickel disilicide phase.
20. as 18 method, wherein, this gold and indium be combined to form pure indium and two indium metallographics.
21. as 18 method, wherein, this copper and magnesium be combined to form pure magnesium and two magnesium copper phases.
22. as the method for item 19, wherein, this hole is from the nickel disilicide inner extension of this particle in opposite directions.
23. as the method for item 20, wherein, this hole is from the inner extension of this particle in opposite directions of pure indium.
24. as the porousness powder of item 21, wherein, this hole is from the inner extension of this particle in opposite directions of pure magnesium.
[description of drawings]
Fig. 1 shows the equilibrium phase diagram of nickel and silicon;
Fig. 2 A and 2B are for disperseing 1000 times of SEM Photomicrographs of amplification of nisiloy two-phase alloys powder through the aerosol mode;
Fig. 3 A and 3B are respectively 1000 times and 5000 times of SEM Photomicrographs of nisiloy two-phase alloys porousness powder of the present invention;
Fig. 4 shows the equilibrium phase diagram of gold and indium; And
Fig. 5 shows the equilibrium phase diagram of copper and magnesium.
[embodiment]
Below by particular specific embodiment explanation embodiments of the present invention, those skilled in the art can understand effect of the present invention and characteristics easily by the content that this specification sheets disclosed.
" phase (phase) " used herein but be meant Materials science defined in material system homogeneous separator physically, perhaps according to Metal Handbook, phase diagram is defined in differing temps and component proportions in the equilibrium phase diagram, the balance and stability phase that forms.In the present invention, " form at least two kinds of phases " and be meant and select in equilibrium phase diagram, to show two kinds of phases or heterogenetic composition range.
The invention provides a kind of porousness powder, comprise a plurality of particles, this each particle has at least two kinds of elements, and at least two kinds of phases of this at least two kinds of elements formation, and this each particle surface is formed with the hole that extends internally from one of these at least two kinds of phases person.
In the porousness powder that the present invention makes, the median size of this particle is 0.5 to 500 μ m.
For reaching purpose of the present invention, the present invention selects at least two kinds of element materials, in one embodiment, selects two kinds of materials as demonstration.And in the selection of material as long as these at least two kinds elementary composition and ratios form in solid solution condition or in equilibrium phase diagram or show two or more at least different phases, promptly can be used as the material of porousness powder of the present invention.Its limiting examples comprises the combination of combination, iron and nickel of combination, copper and zinc of combination, copper and magnesium of combination, gold and indium of nickel and silicon or the combination of aluminium and magnesium.For example, the atomic ratio of nickel and element silicon formed nickel disilicide (NiSi at 1: 2 o'clock
2) Jie's metallic compound reach mutually and have the pure silicon phase.Because pure silicon has different reactivities mutually with nickel disilicide, erosion resistance as acid solution, so be applicable to method of the present invention, see through acid etching to obtain the porousness powder, and the formed a plurality of holes of each particle surface of this powder, be to form one of phase person to the inner extension of this particle from this at least two kinds of elements, that is from the nickel disilicide inner extension of this particle in opposite directions.
The formation of hole of the present invention is reached by acid etching, therefore obtains the hole of different shape, usually, because the continuity of phase so the hole that extends inward from the particle surface different positions also must interpenetrate, makes specific surface area higher.
On the other hand, the present invention also provides a kind of method of making the porousness powder, comprising: make at least two kinds of element fusions, and the ratio of this element is through allocating for forming two kinds of phases, the fused solution of two kinds of phases of this two kinds of elements formation after fusion at least at least at least; Then this fused solution is granulated into the powder particle with at least two kinds of phases; And this powder particle of acid etching, and the formed phase of these at least two kinds of elements of this acid corrosion one of them, make this corrosive extend to internal corrosion, to obtain porousness powder of the present invention from particle surface.
Should know from experience, the porousness powder that the present invention makes according to desire selects element to show the phase person who comprises two or more in equilibrium phase diagram, and according at least two kinds of elements of equilibrium phase diagram allotment ratio fusion.In addition, by context as can be known, no matter select two or more element material, all can be in order to prepare porousness powder of the present invention, as long as used element material is for forming at least two kinds of phases, and select suitable element ratio to get final product according to equilibrium phase diagram, equilibrium phase diagram also knows for those skilled in the art can understand, and needn't be in giving unnecessary details herein.
At first, because of the present invention selects at least two kinds of elements for use, and this element forms at least two kinds of phases, be with, must implement the fusion step with the melting temperature of the phase that is higher than this element or formation.Fully behind the fusion element material; then disperse granulation step, on the implementation by this fused solution of spray pattern granulation, to obtain having the powder particle of at least two kinds of phases; usually, this spray pattern is to utilize water spray, gas blowout mist or aqueous vapor unification spraying to carry out.In addition, for avoiding the oxidation of material, can also rare gas element as the used gas of gas blowout mist, for example, argon gas etc.In a specific embodiment of the present invention, a plurality of average particle sizes by the spray pattern gained are 0.5 to 500 μ m.
Owing to comprise different phases in this powder, therefore its chemically reactive difference utilizes acid solution or other reactive solution acid etching one of phases that this at least two kinds of elements form, and makes this phase or hole extend to internal corrosion from particle surface.In the present invention, do not limit the employed acid solution kind of this aciding especially, generally be to decide according to selected element, and the selection of this pickling solution is difference to some extent according to the difference of desiring to select for use the element of making powder, the foundation of selecting is for to wherein one obvious corrosive effect being arranged mutually, and is then relatively stable mutually for another.For example, in a specific embodiment of the present invention, when the element of selecting for use is nickel and silicon, and this nickel and silicon form pure silicon and nickel disilicide phase time, therefore selectable acid solution prescription reacts to produce acid etching mutually at this nickel disilicide for the hydrochloric acid that this nickel disilicide had mutually corrosive effect, the hydrogen fluoride pickling solution that mixes with water.In another specific embodiment of the present invention, select for use gold and phosphide element to form pure indium and two indium gold (AuIn
2) phase, wherein, utilize hydrochloric acid that this indium is carried out selective corrosion mutually, to make the porousness powder.In a specific embodiment more of the present invention, select for use copper and magnesium elements to form pure magnesium and two magnesium copper (CuMg
2) phase, wherein, utilize hydrochloric acid that this magnesium is carried out selective corrosion mutually, to make the porousness powder.
Hence one can see that, and the porousness powder of the present invention that makes, the skeleton of each particle be based on mutually metastable to acid solution, for example pure silicon phase, two indium metallographics and two magnesium copper phases.
In the method for manufacturing porousness powder of the present invention, also be included in this powder particle of acid etching after, remove this porousness powder residual acid.Usually, with water or with this sour liquid of neutralization clean this porousness powder with remove this porousness powder residual acid.The preferably, after the acid residual of this porousness powder in removing, dry this porousness powder, usually, in 80 to 250 ℃ of dryings of this porousness powder 2 to 10 hours.
On the other hand, processing procedure atmosphere in the preparation is to decide according to the selected element of thermodynamic(al)equilibrium phasor.In a specific embodiment, under vacuum state atmosphere, carry out, and vacuum tightness is higher than 10-1 holder (torr).The acid etching time is adjusted according to the size and the depth of required hole, and the employed prescription of aciding, kind or concentration are also adjusted according to selected element.General suitable acid etching temperature is about 0 to 100 ℃.In addition, can carry out depickling at the powder after aciding is handled, with remove this porousness powder residual acid, prevent that residual pickling solution from continuing the corrosion powder.
Be formed at the porousness powder of a plurality of holes on a plurality of particle surfaces, the particle diameter of its hole and distribution density are relevant with selected constituent content ratio, and active higher phase ratio is high more, and the hole that stays after the corrosion is many more, and hole density is higher.Otherwise then the hole that stays after the corrosion is few more, and the hole distribution density is lower.Therefore, the allotment element ratio for the manufacturing step that forms at least two kinds of phases in order to control or adjust the size and the density of the hole of this porousness powder.But as long as be formed with the powder particle of at least two kinds of phases, after via enforcement method of the present invention, the porousness powder of gained all can have high-specific surface area.
Embodiment 1
Consult nisiloy equilibrium phase diagram shown in Figure 1, wherein, the longitudinal axis represent temperature (℃), last transverse axis is represented the atomic ratio of silicon, following transverse axis is represented the weight ratio of nickel and silicon.Behind selected nickel and two kinds of elements of silicon, be nickel according to nickel and Siliciumatom ratio: silicon is 1: 2 o'clock (as falling within the dotted line shown in Fig. 1 label L) to have nickel disilicide (NiSi in this equilibrium phase diagram
2) Jie's metallic compound phase, the weight ratio of therefore allocating nickel and silicon is 45: 55 o'clock, can produce two kinds of out of phase powdered alloys of pure silicon and nickel disilicide.Place the gas blowout mist to make the silicon carbide crucible of powder machine the element after selected, utilize mechanical pumping that the vacuum tightness of cavity is extracted into below about 10-1 holder (torr), again according to phasor, Si
55Ni
45Fusing point be about 1185 ℃ (in falling within the square frame scope shown in Fig. 1 mark A), utilizing cycle inductive method (frequency induction) to begin to promote all wave powers heats, make temperature increase to 1400 ℃, this nickel of fusion and silicon, treat to pour in the funnel (Tundish) after the complete fusion of nickel and silicon, with argon gas fused soup ejection is disperseed nickel and silicon after this fusion again, make powder.Observe with SEM, its Photomicrograph is shown in Fig. 2 A and 2B.
After disperseing this fused nickel and silicon, carry out selective corrosion with acid solution again.By volume, the prescription of this acid solution are hydrochloric acid (HCl): hydrogen fluoride (HF): water (H
2O) be 2: 5: 20, reaction is two hours under 50 ℃ temperature, because silicon is comparatively stable in acid solution, the corrosive behavior does not take place almost, and nickel disilicide phase factor reactive behavior is better, is stayed hole by acid liquid corrosion, and makes porousness powder of the present invention.Observe this porousness powder with SEM, its through the Photomicrograph of acid etching shown in Fig. 3 A and 3B, those holes are to extend to this particle inside from one of phase that this at least two kinds of elements form, and it is quite evenly fine to observe also visible this hole of the higher Fig. 3 B of enlargement ratio.
Embodiment 2
Consult golden indium equilibrium phase diagram shown in Figure 4, wherein, the longitudinal axis represent temperature (℃), last transverse axis is represented the atomic ratio of indium, following transverse axis is represented the weight ratio of indium.In this equilibrium phase diagram behind selected gold and two kinds of elements of indium, Yi Jin and phosphide atom are than being gold: indium is to have two indium gold (AuIn at 1: 2 o'clock
2) Jie's metallic compound phase, the weight ratio of therefore allocating indium and gold is 90: 10 o'clock, can produce pure indium and AuIn
2Two kinds of out of phase powdered alloys.Place the gas blowout mist to make the powder machine element after selected, utilize mechanical pumping that the vacuum tightness of cavity is extracted into about 10
-1Below the holder (torr), utilize the cycle inductive method to begin to promote all wave powers and heat, make temperature increase to 500 ℃, this indium of fusion and gold, treat that indium and gold pour in the funnel (Tundish) after the fusion fully, with argon gas the ejection of fused soup is disperseed indium and gold after this fusion again, make powder.
After disperseing this fused gold and indium, carry out selective corrosion with hydrochloric acid again.Reaction is two hours under 50 ℃ of temperature, because AuIn
2Comparatively stable in acid solution, the corrosive behavior does not almost take place, indium phase factor reactive behavior is better, is stayed hole by acid liquid corrosion, and makes porousness powder of the present invention.
Embodiment 3
Consult copper magnesium homeostasis phasor shown in Figure 5, wherein, the longitudinal axis represent temperature (℃), last transverse axis is represented the atomic ratio of magnesium, following transverse axis is represented the weight ratio of magnesium.In this equilibrium phase diagram behind selected copper and two kinds of elements of magnesium, according to copper and magnesium atom than being copper: magnesium is to have two magnesium copper (CuMg at 1: 2 o'clock
2) Jie's metallic compound phase, the weight ratio of therefore allocating copper and magnesium is 10: 90 o'clock, can produce pure magnesium and CuMg
2Two kinds of out of phase powdered alloys.Place the gas blowout mist to make the powder machine element after selected, utilize mechanical pumping that the vacuum tightness of cavity is extracted into about 10
-1Below the holder (torr), utilize the cycle inductive method to begin to promote all wave powers and heat, make temperature increase to 650 ℃, this copper of fusion and magnesium, treat to pour in the funnel (Tundish) after the complete fusion of copper and magnesium, with argon gas fused soup ejection is disperseed copper and magnesium after this fusion again, make powder.
After disperseing this fused gold and indium, carry out selective corrosion with hydrochloric acid again.Reaction is two hours under 50 ℃ of temperature, because CuMg
2Comparatively stable in acid solution, the corrosive behavior does not almost take place, magnesium phase factor reactive behavior is better, is stayed hole by acid liquid corrosion, and makes porousness powder of the present invention.
Through the foregoing description as can be known, as long as can have or form two kinds of elements of at least two kinds of phases or select two or more elements, all can make as porousness powder of the present invention, and be not limited to metal or nonmetal, the embodiment of the invention then is preferable illustration person.On the particle surface of the porousness powder that the present invention makes, have a plurality of holes, and this hole extends internally from one of these two kinds of phases at least, therefore has high specific surface area, this promptly utilizes at least two kinds of elements to form at least two kinds of excellent results that make the porousness powder after mutually, will more help polynary application such as energy storage, chemisorption, electrode materials, catalyzer, absorption of electromagnetic wave and strainer.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Any those skilled in the art all can be under spirit of the present invention and category, and the foregoing description is modified and changed.Therefore, the scope of the present invention should be listed as claims.
Claims (14)
1. porousness powder comprises:
A plurality of particles, this each particle has at least two kinds of elements, and at least two kinds of phases of this at least two kinds of elements formation, and this each particle surface is formed with the hole that extends internally from one of these at least two kinds of phases.
2. porousness powder as claimed in claim 1, wherein, the median size of these a plurality of particles is 0.5 to 500 μ m.
3. porousness powder as claimed in claim 1, wherein, these at least two kinds of elements independently are selected from the combination of combination, iron and nickel of combination, copper and zinc of combination, copper and magnesium of combination, gold and indium of nickel and silicon or the combination of aluminium and magnesium; Preferably, this nickel and silicon be combined to form pure silicon and nickel disilicide phase, perhaps should gold and indium be combined to form pure indium and two indium metallographics, perhaps this copper and magnesium is combined to form pure magnesium and two magnesium copper phases.
4. porousness powder as claimed in claim 3, wherein, this hole is from the nickel disilicide inner extension of this particle in opposite directions; Perhaps, this hole is from the inner extension of this particle in opposite directions of pure indium; Perhaps, this hole is from the inner extension of this particle in opposite directions of pure magnesium.
5. method of making the porousness powder comprises:
Make at least two kinds of ratios be melt into fused solution with at least two kinds of phases through the element of allotment;
This fused solution is granulated into powder particle with at least two kinds of phases; And
This powder particle of acid etching makes at least two kinds of corrosion mutually one of in mutually, makes this extend to form hole from particle surface to internal corrosion, to obtain the porousness powder.
6. method as claimed in claim 5 is by this fused solution of spray pattern granulation.
7. method as claimed in claim 5, wherein, the median size of this particle is 0.5 to 500 μ m.
8. method as claimed in claim 5, also be included in this powder particle of acid etching after, remove this porousness powder residual acid.
9. method as claimed in claim 8, with water or with this sour liquid of neutralization clean this porousness powder with remove this porousness powder residual acid.
10. method as claimed in claim 9, also be included in remove after the residual acid, dry this porousness powder.
11. as the method for claim 10, wherein, in 80 to 250 ℃ of dryings of this porousness powder 2 to 10 hours.
12. method as claimed in claim 6, wherein, this spray pattern is selected from water spray, gas blowout mist or aqueous vapor unification spraying.
13. method as claimed in claim 5, wherein, these at least two kinds of elements independently are selected from the combination of combination, iron and nickel of combination, copper and zinc of combination, copper and magnesium of combination, gold and indium of nickel and silicon or the combination of aluminium and magnesium; Preferably, this nickel and silicon be combined to form pure silicon and nickel disilicide phase, perhaps should gold and indium be combined to form pure indium and two indium metallographics, perhaps this copper and magnesium is combined to form pure magnesium and two magnesium copper phases.
14. as the method for claim 13, wherein, this hole is from the nickel disilicide inner extension of this particle in opposite directions, perhaps this hole is from the inner extension of this particle in opposite directions of pure indium, and perhaps this hole extends this particle inside in opposite directions from pure magnesium.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149607A (en) * | 2015-09-16 | 2015-12-16 | 哈尔滨工业大学 | Preparation method of nano-porous titanium powder or nano-porous nickel powder |
| CN109888232A (en) * | 2014-04-15 | 2019-06-14 | 中国科学院宁波材料技术与工程研究所 | A kind of lithium ion battery porous nano silico-carbo composite negative pole material and preparation method thereof |
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2009
- 2009-10-20 CN CN2009101808946A patent/CN102041406A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109888232A (en) * | 2014-04-15 | 2019-06-14 | 中国科学院宁波材料技术与工程研究所 | A kind of lithium ion battery porous nano silico-carbo composite negative pole material and preparation method thereof |
| CN105149607A (en) * | 2015-09-16 | 2015-12-16 | 哈尔滨工业大学 | Preparation method of nano-porous titanium powder or nano-porous nickel powder |
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