CN1803353A - Method for preparing copper powder - Google Patents
Method for preparing copper powder Download PDFInfo
- Publication number
- CN1803353A CN1803353A CN 200610020164 CN200610020164A CN1803353A CN 1803353 A CN1803353 A CN 1803353A CN 200610020164 CN200610020164 CN 200610020164 CN 200610020164 A CN200610020164 A CN 200610020164A CN 1803353 A CN1803353 A CN 1803353A
- Authority
- CN
- China
- Prior art keywords
- copper powder
- copper
- initial
- liquid
- predecessor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a making method of metal copper powder in the metal material technique domain, which comprises the following steps: adapting mechanic grinding method, liquid-phase electrochemical method or liquid-phase reducer method to prepare initial copper powder; preparing the pioneer body within initial copper powder, electrolyte, little reducer and water; placing the pioneer body in the alkaline and weak reducer environment; proceeding hot water disposal at 120-300 deg C for 30 min-48 h; drying in the vacuum; producing the metal copper powder through cleaning by centrifugal separation, deionized water and anhydrous alcohol with aza ribavirin. The invention displays more even grain size distribution with higher sphericity and oxidation resistance property, which reduces the making cost.
Description
Technical field
A kind of method for preparing copper powder belongs to the metal material technical field, is specifically related to the technology of preparing of copper powder.
Background technology
Copper powder is meant that metallic copper simple substance powder is the metal powder material of main component.Copper powder is the important raw and processed materials of powder metallurgy, be mainly used in copper base friction material, electrical carbon product, oiliness bearing, contact alloy, chip capacitor, chemical industry or sintering machinery part etc., in industry such as aviation, automobile, national defence, military affairs, electronics, be with a wide range of applications.In general, the metallic particles sphericity is high more, and then specific area is more little, is present in the quantity few more (being that active atomic is few more) of the atom on surface, and then the antioxygenic property of metallic particles is good more; On the other hand, the metallic particles particle diameter is more little, and its surface area is also big more, and its antioxygenic property is also poor more.
Usually the method for preparing copper powder and copper alloy powder has vapor phase method, liquid phase method and mechanical crushing method etc.Vapor phase method prepares copper powder and is meant and under vacuum condition the metallic copper organic compound is decomposed to form copper atom that copper atom condenses becomes copper powder again.Vapor phase method prepares in the process of copper powder, because capillary effect, than the copper powder that is easier to make form of spherical particles, and prepared copper powder particle size distribution range is narrower, particle diameter is controlled, oxidation resistance is higher, but because vapor phase method equipment requires height, reaction need condition be carried out under certain vacuum condition, so it costs an arm and a leg.Liquid phase method is mainly to be to adopt reducing agent that metal copper ion is reduced to metallic copper simple substance.Although this method price is low, the metallic particles particle diameter of preparation is very little, and the particle diameter skewness, and specific area is huge, and oxidation resistance is relatively poor.Mechanical crushing method is that mechanical means such as employing ball milling are pulverized bulky grain and are granule with previously prepared powder just, the metal-powder pattern systematicness extreme difference of this method preparation, and grain diameter is big.
Because vapor phase method prepares copper powder equipment requirement height, cost an arm and a leg, and the prepared copper powder pattern systematicness extreme difference of mechanical crushing method, and grain diameter is big, can not adapt to the requirement of industrial applications, so liquid phase method prepares the emphasis that copper powder becomes present research.
When liquid phase method prepares copper powder, can adopt reducing agent and electrochemical method.Electrochemical process prepares copper powder by the method in cathodic reduction and is dendroid, and is different, and its pollution is big, and powder property is poor, and granularity is generally at (about 40～120 μ m).Adopting reducing agent to prepare copper powder is the emphasis of studying at present, and the reducing agent kind of use is a lot.U.S. Pat 5741347 adopts hydrazine as reducing agent, prepares copper powder under alkali condition; It is that reducing agent prepares superfine cupper powder that Chinese patent CN1188700A adopts sodium dithionite.The copper powder of these method preparations is because particle diameter is little, and size distribution is big, and antioxygenic property is very poor.
Summary of the invention
Purpose of the present invention is exactly, particle diameter poor for the powder property of the copper powder that the overcomes liquid phase method preparation shortcomings such as wide and antioxygenic property difference that distribute, and prepares the copper powder that particle size distribution range is narrow, sphericity is high and antioxygenic property is good.
Detailed technology scheme of the present invention is:
A kind of method for preparing copper powder, specific embodiment is characterized in that as shown in Figure 1 it comprises the steps:
1. preparation initial copper powder.Initial copper powder can adopt mechanical crushing method, liquid phase electrochemical process or the preparation of liquid-phase reduction agent method.
2. preparation predecessor.Initial copper powder is put into water, to 11-14, add the reducing agent that is equivalent to initial copper powder 0.5-10% quality and prepare predecessor with the pH value of NaOH, potassium hydroxide or ammoniacal liquor regulator solution.
3. hydrothermal treatment consists and post processing.Predecessor is transferred in the pyroreaction still, is warming up to 120～300 ℃, and handled 30 minutes～48 hours under the water vapor pressure under the corresponding temperature, the water circulation is cooled to below 50 ℃ then, and the liquid-solid system after handling is carried out centrifugation; Centrifugation gained solid product cleaned to pH value of solution with pure water be neutral and do not have electrolyte substantially, can obtain the copper powder that particle size distribution range is narrow, sphericity is high, oxidation resistance is strong after under vacuum condition, drying at last.
According to the prepared copper powder of above step, color and luster is purplish red, and particle size range to micron dimension, can be preserved not oxidized for a long time (its oxidizing temperature can reach about 230 ℃) in sub-micron under the normal temperature environment.
If adopt the liquid phase electrochemical process to prepare initial copper powder, concrete grammar can be in the step 1.: at first mantoquita is dissolved in the deionized water, adds sulfuric acid and surfactant, make the electrolyte of copper powder; Be anode with the copper coin then, inert metal plates such as copper coin or stainless steel are negative electrode, at 2.5-200A/dm
2Carry out electrolysis under the current density, prepare the electrolysis initial copper powder.
Be equipped with initial copper powder as if employing liquid-phase reduction agent legal system in the step 1., concrete grammar can be: at first mantoquita is dissolved in the deionized water, and extremely alkaline with the pH value of NaOH, potassium hydroxide or ammoniacal liquor regulator solution, add surfactant as dispersant, stir, form suspension; Suspension is warmed up to 50～90 ℃ then, stirs adding reducing agent down, need in the course of reaction to add alkaline matter to keep the pH value of reaction system; When reaction system has only a small amount of gas generation, add an amount of reducing agent again, continue to stir also ageing 5～120 minutes, after initial copper powder is prepared in centrifugation.
When adopting liquid phase electrochemical process or liquid-phase reduction agent legal system to be equipped with initial copper powder, used mantoquita can be inorganic mantoquita or organic copper salts such as copper formate, copper acetate such as copper chloride, copper bromide, copper sulphate.
When preparing predecessor in the step 2., can add an amount of surfactant as dispersant, to obtain finely dispersed predecessor.
In the last handling process of the described hydrothermal treatment consists of step 3., the solid product of centrifugation gained is after the pure water washing, the available absolute ethyl alcohol dehydration that contains 0.5% left and right sides benzotriazole, vacuum drying under 60～160 ℃/650～760mmHg then promptly gets the end product copper powder.The purpose of using benzotriazole is that the surface that is allowed to condition at copper powder forms layer protecting film, with the antioxygenic property of further raising copper powder.Through containing the absolute ethyl alcohol processed of 0.5% left and right sides benzotriazole, and after vacuum drying under 60～160 ℃/650～760mmHg the copper powder of gained, its oxidizing temperature can be increased to about 260 ℃.
Used reducing agent can be sodium hypophosphite, sodium dithionate, glycerine, hydrazine and hydrazine compound, formaldehyde and senior aldehydes, boron hydride, vitamin C etc. in the said process; Used surfactant can be JFC type surfactant, 0P-10, polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), polyethylene glycol, neopelex, gelatin etc.
Hydro-thermal method is meant the predecessor of a definite form (as the slip that has prepared, powder that drying was handled or solution etc.), be placed in the autoclave, under the certain high temperature condition of high voltage, carry out hydro-thermal reaction, obtain the powdery pulp of crystallization, through post processings such as separation, washing, dryings, prepare required powder method then.Usually utilize the copper powder of liquid phase electrochemical process or liquid-phase reduction agent method preparation,, have a large amount of lattice defects, make to be difficult to the very easily oxidation of prepared copper powder to obtain highly purified copper powder because degree of crystallinity is poor.And hydro-thermal reaction is to carry out in material high degree of dispersion, good fluidity and the very uniform thin environment that distributes, thus can obtain well-crystallized's powder, thus improve the antioxygenic property of copper powder; In addition, adopt hydro-thermal method can reduce the aggregate formation of powder and the introducing of impurity, make powder have good good dispersion and the high characteristics of purity, its particle diameter substep is also more even.
Also need to prove, predecessor in the pyroreaction still reaction temperature and certain relation was arranged between the reaction time, if reaction temperature is higher, the then required reaction time is shorter; If reaction temperature is lower, the then required reaction time is longer.In addition, the reaction time is long more, and the particle diameter of prepared copper powder is big more; Otherwise the particle diameter of prepared copper powder is more little.
Essence of the present invention is: at first adopt liquid phase method electrochemical process or liquid-phase reduction agent legal system to be equipped with initial copper powder, prepare predecessor (comprising the system that the initial copper powder that prepared, electrolyte, a small amount of reducing agent and water are formed) then, then predecessor is placed the environment of alkalescence and weak reductant, carry out hydrothermal treatment consists, in the hydrothermal treatment consists process, the copper powder size in the predecessor is narrowed down gradually, surface topography shifts to spheroidization gradually, reduced the quantity of surface atom like this, the copper powder oxidation resistance of preparation obviously increases.
The invention has the beneficial effects as follows: 1, compare with the prepared copper powder of mechanical crushing method, liquid phase electrochemical process or liquid-phase reduction agent method, the prepared copper powder particle diameter of the present invention distributes more evenly, sphericity is higher and antioxygenic property is better; 2, prepared copper powder performance is not second to the prepared copper powder of employing vapor phase method, but cost reduces greatly.
Description of drawings
Fig. 1 is the preparation method's of an a kind of copper powder of the present invention process flow diagram.
Fig. 2 adopts liquid-phase reduction agent method to make ESEM (SEM) photo of the copper powder of preparation, and as can be seen, liquid-phase reduction agent method is made the copper powder particle diameter skewness of preparation from photo, and sphericity is relatively poor.
Fig. 3 adopts liquid-phase reduction agent method to make the initial copper powder of preparation and ESEM (SEM) photo of the copper powder after hydrothermal treatment consists, and as can be seen, the copper powder particle diameter after hydrothermal treatment consists distributes very evenly from photo, and sphericity is higher.
The specific embodiment
The specific embodiment one: copper sulphate 20g is dissolved in the deionized water, adds sulfuric acid 180g, sodium chloride 15mg is made into 11 solution, is anode with the fine copper, and polishing stainless steel is a negative electrode, and cathode-current density is 12A/dm
2, at room temperature electrolysis 20min prepares initial copper powder, and copper powder is transferred in another container, adds the 100ml deionized water, and regulating the pH value with NaOH is 13.5, adds the 5ml hydrazine, stirs, and obtains the predecessor of electrolytic copper powder.Predecessor is placed autoclave, be warming up to 180 ℃, reaction 12h, recirculated water cools off fast, uses washed with de-ionized water four times after the centrifugation, then with the ethanol solution dehydration that contains benzotriazole 0.5g/l three times, vacuum drying under 60～160 ℃/650～760mmHg promptly obtains mauve copper powder, and particle diameter mainly is distributed in 5～15 μ m, sphericity is higher, and oxidation resistance doubles above than the copper powder without hydrothermal treatment consists.
The specific embodiment two: the 0.5mol/l copper-bath 500mL for preparing is placed reactor, and constant temperature is in 80 ℃; NaOH with 5.0mol/L stirs adjusting pH value to 14 down, makes suspension.Stir and drip formaldehyde down in suspension, and maintain more than 13 with the pH value of NaOH control solution, the adding of formaldehyde is till the bubbles volume that reacts generation seldom.Continue to drip a small amount of formaldehyde, stir and continue reaction 10min down, make the initial stage copper powder, be transferred to (the visual volume ratio of copper powder and mother liquor is 1: 4～10) in another container with copper powder with a certain amount of mother liquor, regulating pH with NaOH is 13.5～14, add the formaldehyde of 3ml, stir, obtain the predecessor of reducing agent method preparation.Predecessor is transferred in the autoclave, be warming up to 200 ℃, reaction 120min, recirculated water cools off fast, uses washed with de-ionized water four times after the centrifugation, then with the ethanol solution dehydration that contains benzotriazole 0.5g/l three times, vacuum drying under 60～160 ℃/650～760mmHg promptly obtains copper powder rosy, and particle diameter mainly is distributed in 0.2-0.3 μ m, sphericity increases substantially, and oxidation resistance is than high more than four times without the copper powder of hydrothermal treatment consists.SEM figure before and after handling is shown in Fig. 2,3.
Claims (8)
1, a kind of method for preparing copper powder, preparation initial copper powder can adopt mechanical crushing method, liquid phase electrochemical process or the preparation of liquid-phase reduction agent method, it is characterized in that it comprises the steps:
1). the preparation predecessor, initial copper powder is put into water, to 11-14, adding is equivalent to the reducing agent of initial copper powder 0.5-10% quality and prepares predecessor with the pH value of NaOH, potassium hydroxide or ammoniacal liquor regulator solution;
2). hydrothermal treatment consists and post processing, predecessor is transferred in the pyroreaction still, is warming up to 120～300 ℃, and under the water vapor pressure under the corresponding temperature, handled 30 minutes～48 hours, the water circulation is cooled to below 50 ℃ then, and the liquid-solid system after handling is carried out centrifugation; Centrifugation gained solid product cleaned to pH value of solution with pure water be neutral and do not have electrolyte substantially, can obtain the copper powder that particle size distribution range is narrow, sphericity is high, oxidation resistance is strong after under vacuum condition, drying at last.
2, a kind of method for preparing copper powder according to claim 1, it is characterized in that adopting the liquid phase electrochemical process to prepare initial copper powder, concrete grammar can be: at first mantoquita is dissolved in the deionized water, adds sulfuric acid and surfactant, make the electrolyte of copper powder; Be anode with the copper coin then, inert metal plates such as copper coin or stainless steel are negative electrode, at 2.5-200A/dm
2Carry out electrolysis under the current density, prepare the electrolysis initial copper powder.
3, a kind of method for preparing copper powder according to claim 1, it is characterized in that adopting liquid-phase reduction agent legal system to be equipped with initial copper powder, concrete grammar can be: at first mantoquita is dissolved in the deionized water, pH value with NaOH, potassium hydroxide or ammoniacal liquor regulator solution is extremely alkaline, add surfactant as dispersant, stir, form suspension; Suspension is warmed up to 50～90 ℃ then, stirs adding reducing agent down, need in the course of reaction to add alkaline matter to keep the pH value of reaction system; When reaction system has only a small amount of gas generation, add an amount of reducing agent again, continue to stir also ageing 5～120 minutes, after initial copper powder is prepared in centrifugation.
4, according to claim 2,3 described a kind of methods that prepare copper powder, it is characterized in that, when adopting liquid phase electrochemical process or liquid-phase reduction agent legal system to be equipped with initial copper powder, used mantoquita can be inorganic mantoquita or organic copper salts such as copper formate, copper acetate such as copper chloride, copper bromide, copper sulphate.
5, a kind of method for preparing copper powder according to claim 1 is characterized in that, when preparing predecessor in the step 1., can add an amount of surfactant as dispersant, to obtain finely dispersed predecessor.
6, a kind of method for preparing copper powder according to claim 1, it is characterized in that, in the last handling process of the described hydrothermal treatment consists of step 2., the solid product of centrifugation gained is after the pure water washing, the available absolute ethyl alcohol dehydration that contains 0.5% left and right sides benzotriazole, vacuum drying under 60～160 ℃/650～760mmHg then promptly gets the end product copper powder.
7, according to claim 1,2 or 3 described a kind of methods that prepare copper powder, it is characterized in that described reducing agent can be sodium hypophosphite, sodium dithionate, glycerine, hydrazine and hydrazine compound, formaldehyde and senior aldehydes, boron hydride, vitamin C etc.
8, according to claim 1,2 or 3 described a kind of methods that prepare copper powder, it is characterized in that described surfactant can be JFC type surfactant, OP-10, polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), polyethylene glycol, neopelex, gelatin etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100201646A CN100427247C (en) | 2006-01-17 | 2006-01-17 | Method for preparing copper powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100201646A CN100427247C (en) | 2006-01-17 | 2006-01-17 | Method for preparing copper powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1803353A true CN1803353A (en) | 2006-07-19 |
| CN100427247C CN100427247C (en) | 2008-10-22 |
Family
ID=36865574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100201646A Expired - Fee Related CN100427247C (en) | 2006-01-17 | 2006-01-17 | Method for preparing copper powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100427247C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992300A (en) * | 2010-11-04 | 2011-03-30 | 江苏大方金属粉末有限公司 | Preparation method for sintered copper powder material of heat pipe |
| CN102151823A (en) * | 2011-01-26 | 2011-08-17 | 宁波广博纳米材料有限公司 | Antioxidation method of nano copper powder |
| CN101835555B (en) * | 2007-11-05 | 2012-08-22 | 住友金属矿山株式会社 | Copper fine particle, method for producing the same, and copper fine particle dispersion |
| CN103949653A (en) * | 2014-04-02 | 2014-07-30 | 西安交通大学 | Product separation and organic ligand recovery system of supercritical hydro-thermal synthesis system |
| CN104475722A (en) * | 2014-11-12 | 2015-04-01 | 有研粉末新材料（北京）有限公司 | Low-lead, low-apparent-density high-branch-shaped electrolytic copper powder and preparation method thereof |
| CN110116218A (en) * | 2019-05-29 | 2019-08-13 | 西安工程大学 | A kind of preparation method of the narrow copper powder of high-purity particle diameter distribution |
| CN110144604A (en) * | 2019-06-17 | 2019-08-20 | 阳谷祥光铜业有限公司 | A kind of preparation process of electrodeposition copper powder |
| CN112021334A (en) * | 2020-09-10 | 2020-12-04 | 中国有色桂林矿产地质研究院有限公司 | Porous copper powder carrier-loaded silver-based antibacterial material and preparation method thereof |
| CN112692305A (en) * | 2021-03-23 | 2021-04-23 | 陕西斯瑞新材料股份有限公司 | Preparation method of batch type 3D printed CuCr composite contact |
| CN113523269A (en) * | 2021-06-08 | 2021-10-22 | 五邑大学 | Copper powder and preparation method and application thereof |
| CN113832500A (en) * | 2021-10-20 | 2021-12-24 | 昆明高聚科技有限公司 | Preparation method of electronic-grade high-purity low-apparent-density dendritic copper powder |
| CN116673479A (en) * | 2023-04-27 | 2023-09-01 | 安徽旭晶粉体新材料科技有限公司 | Preparation method for synthesizing cuprous chloride from pure copper powder and chlorine gas |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6679937B1 (en) * | 1997-02-24 | 2004-01-20 | Cabot Corporation | Copper powders methods for producing powders and devices fabricated from same |
| CN1204042C (en) * | 2003-06-10 | 2005-06-01 | 东北师范大学 | Method for preparing nano tube of some metalloid oxides and metals with size and shape being controllable |
| CN1247354C (en) * | 2004-11-23 | 2006-03-29 | 北京科技大学 | Method for preparing nanometer copper powder by chemical reduction in water solution |
-
2006
- 2006-01-17 CN CNB2006100201646A patent/CN100427247C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835555B (en) * | 2007-11-05 | 2012-08-22 | 住友金属矿山株式会社 | Copper fine particle, method for producing the same, and copper fine particle dispersion |
| CN101992300A (en) * | 2010-11-04 | 2011-03-30 | 江苏大方金属粉末有限公司 | Preparation method for sintered copper powder material of heat pipe |
| CN102151823A (en) * | 2011-01-26 | 2011-08-17 | 宁波广博纳米材料有限公司 | Antioxidation method of nano copper powder |
| CN103949653A (en) * | 2014-04-02 | 2014-07-30 | 西安交通大学 | Product separation and organic ligand recovery system of supercritical hydro-thermal synthesis system |
| CN103949653B (en) * | 2014-04-02 | 2015-10-28 | 西安交通大学 | A kind of product separation of supercritical water thermal synthesis system and organic ligand recovery system |
| CN104475722A (en) * | 2014-11-12 | 2015-04-01 | 有研粉末新材料（北京）有限公司 | Low-lead, low-apparent-density high-branch-shaped electrolytic copper powder and preparation method thereof |
| CN110116218A (en) * | 2019-05-29 | 2019-08-13 | 西安工程大学 | A kind of preparation method of the narrow copper powder of high-purity particle diameter distribution |
| CN110116218B (en) * | 2019-05-29 | 2022-06-17 | 西安工程大学 | Preparation method of high-purity narrow-particle-size-distribution copper powder |
| CN110144604A (en) * | 2019-06-17 | 2019-08-20 | 阳谷祥光铜业有限公司 | A kind of preparation process of electrodeposition copper powder |
| CN112021334A (en) * | 2020-09-10 | 2020-12-04 | 中国有色桂林矿产地质研究院有限公司 | Porous copper powder carrier-loaded silver-based antibacterial material and preparation method thereof |
| CN112692305A (en) * | 2021-03-23 | 2021-04-23 | 陕西斯瑞新材料股份有限公司 | Preparation method of batch type 3D printed CuCr composite contact |
| CN113523269A (en) * | 2021-06-08 | 2021-10-22 | 五邑大学 | Copper powder and preparation method and application thereof |
| CN113832500A (en) * | 2021-10-20 | 2021-12-24 | 昆明高聚科技有限公司 | Preparation method of electronic-grade high-purity low-apparent-density dendritic copper powder |
| CN116673479A (en) * | 2023-04-27 | 2023-09-01 | 安徽旭晶粉体新材料科技有限公司 | Preparation method for synthesizing cuprous chloride from pure copper powder and chlorine gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100427247C (en) | 2008-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100427247C (en) | Method for preparing copper powder | |
| Zhao et al. | AlSi10Mg alloy nanocomposites reinforced with aluminum-coated graphene: Selective laser melting, interfacial microstructure and property analysis | |
| Zhang et al. | Preparation of copper nanoparticles by chemical reduction method using potassium borohydride | |
| Guo et al. | Preparation and dispersive mechanism of highly dispersive ultrafine silver powder | |
| CN110355380B (en) | Preparation method of hexagonal flaky micron-crystal silver powder | |
| Songping et al. | Preparation of micron size copper powder with chemical reduction method | |
| CN109079154B (en) | Nano silver and synthetic method thereof | |
| CN100544861C (en) | The preparation method of superfine cupper powder | |
| CN112542577B (en) | Nano bismuth/nitrogen-doped carbon foam nanosheet two-dimensional composite material and preparation method and application thereof | |
| CN111889698A (en) | Preparation method of superfine spherical silver powder | |
| CN111020329B (en) | Method for preparing porous tungsten material based on W-Fe-C system corrosion method | |
| CN110340348B (en) | Nano silver powder, preparation method, silver paste and application | |
| CN102554259B (en) | Method for preparing spherical submicron nickel powder with controllable particle size | |
| US20240300011A1 (en) | Metal particle as well as preparation method therefor and use thereof | |
| CN101428345A (en) | Method of manufacturing ultrafine molybdenum powder or ultrafine tungsten powder surface clad metal copper | |
| CN113353917B (en) | Controllable preparation method of self-supporting two-dimensional mesoporous nano material | |
| CN103555049A (en) | Preparation method of nano-copper conductive ink capable of realizing mass production | |
| Liao et al. | Preparation of metallic aluminum compound particles by submerged arc discharge method in aqueous media | |
| CN1844473A (en) | Electrolytic emulsifying method for grain size controllable copper, silver and etc. ultrafine metal powder | |
| CN106623976A (en) | Preparation method of graphene-metal-based bulk composite material | |
| CN116713477A (en) | Preparation method and application method of nano silver powder | |
| CN105817646A (en) | Preparation method for spherical silver powder high in tap density | |
| CN116571734B (en) | Silver particles and preparation method and application thereof | |
| Liu et al. | Fabrication of W@ Cu composite powders by direct electroless plating using a dripping method | |
| KR101478486B1 (en) | Method for making silver coated copper powder by galvanic displacement reaction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kaiping Elec&Eltek E&E Magnetic Products Limited Assignor: University of Electronic Science and Technology of China Contract fulfillment period: 2008.11.20 to 2013.11.20 contract change Contract record no.: 2009440000918 Denomination of invention: Method for preparing copper powder Granted publication date: 20081022 License type: Exclusive license Record date: 2009.8.5 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.20 TO 2013.11.20; CHANGE OF CONTRACT Name of requester: KAIPING YILI ANDA ELECTRICS THIRD CO., LTD. Effective date: 20090805 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20110117 |