CN102303125A - Method for preparing nano silver powder in viscous medium - Google Patents
Method for preparing nano silver powder in viscous medium Download PDFInfo
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- CN102303125A CN102303125A CN201110278418A CN201110278418A CN102303125A CN 102303125 A CN102303125 A CN 102303125A CN 201110278418 A CN201110278418 A CN 201110278418A CN 201110278418 A CN201110278418 A CN 201110278418A CN 102303125 A CN102303125 A CN 102303125A
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Abstract
The invention discloses a method for preparing nano silver powder in viscous medium. The method comprises the following steps of: preparing the viscous medium by using the following raw materials in percentage by mass: 0.001 to 95 percent of surfactant, 0.001 to 95 percent of thickening agent, 0.001 to 80 percent of complexing agent, 0.001 to 75 percent of defoaming agent, 0.001 to 70 percent of antioxidant, 0.001 to 75 percent of silver salt and 0.001 to 98 percent of deionized water; and adding silver salt, stirring uniformly, adding a reducing agent, stirring till full reaction, adding deionized water for diluting and reducing the viscosity in a mass ratio of the total amount of all the materials to the deionized water of 1: (0.5-10), and obtaining the nano silver powder by pressure filtration, washing with the deionized water, washing with acetone and vacuum drying. The selected raw materials are easily obtained; the method is short in production process, high in production efficiency, low in production cost and low in energy consumption; the powder is not easily agglomerated, and the powder has good dispersibility; and the method is suitable for large-scale production, and solves the problems that the nano silver powder prepared by the conventional chemical preparation method is easily oxidized and easily agglomerated.
Description
Technical field
The present invention relates to prepare in a kind of viscous medium the method for nano-silver powder, belong to the nano metal material field.
Background technology
Nano metal material is owing to have effects such as quantum size effect, skin effect, small-size effect and macro quanta tunnel effect, makes it present unusual performance aspect chemistry such as fusing point, magnetic, optics, calorifics, electricity, mechanics and the physical property.At present; Nano metal material has been widely used in high-tech sectors such as high density magnetic recording, wave-absorbing and camouflage, magnetic fluid, radiation proof, chip, microelectronics, photoelectron, effective catalyst, sensing element, new pattern laser, superconduction, is to have very one type of new material of broad prospect of application.Nano-silver powder is a kind of in numerous nano metal materials, is the important source material of producing metal and industrial products such as nonmetallic surface conductive coating, microelectronic component, effective catalyst and electrocondution slurry.
The preparation method of Nano metal powder has physical method and chemical method two big classes.(1) physical method: discharge explosion method, mechanical alloying method, severe plastic deformation method, inert gas evaporation, plasma evaporation method, electronic beam method, ball-milling method, laser beam method etc. are arranged.(2) chemical method: gas-phase combustion synthetic method, laser high-temperature combustion method, gas phase reduction process, pecvd, sol-gel process, coprecipitation, carbonizatin method, microemulsion method, hydro-thermal reaction method, complex compound decomposition method, radiation chemistry synthetic method etc. are arranged.Characteristics such as existing physical method generally has the energy consumption height, efficient is low, investment is big, production cost height; Then efficient is high, production capacity is big, powder purity is low, powder collection is difficult for existing chemical method, be prone to characteristics such as oxidation and easy reunion, has certain limitation respectively.
The present invention is that preparation of raw material obtains viscous medium with surfactant, thickener, complexing agent, defoamer, antioxidant and deionized water; Adding silver salt stirs; After the adding reducing agent is stirred to and reacts completely; Add the deionized water dilution again; Promptly obtain nano-silver powder through press filtration, deionized water washing, washing with acetone and vacuum drying, pressing filtering liquid recycles after concentrating.This preparation method does not see bibliographical information.
Summary of the invention
Prepare the method for nano-silver powder in a kind of viscous medium of the present invention, providing with surfactant, thickener, complexing agent, defoamer, antioxidant, silver salt, reducing agent and deionized water is raw material, in viscous medium, prepares the method for nano-silver powder.
Prepare the method for nano-silver powder in a kind of viscous medium of the present invention, adopt following technical scheme:
According to surfactant; Thickener; Complexing agent; Defoamer; Antioxidant; Silver salt; The mass percent of reducing agent and deionized water is (0.001%～95%): (0.001%～95%): (0.001%～80%): (0.001%～75%): (0.001%～70%): (0.001%～75%): (0.001%～70%): the ratio of (0.001%～98%); Use surfactant; Thickener; Complexing agent; Defoamer; Antioxidant and deionized water preparation obtain viscous medium; Adding silver salt stirs; After the adding reducing agent is stirred to and reacts completely; Be 1: 0.5～10 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Prepare the method for nano-silver powder in a kind of viscous medium of the present invention, have following characteristics:
1; With surfactant; Thickener; Complexing agent; Defoamer; The good deionized water of antioxidant is in the viscous medium of preparation of raw material; Ion; The migration rate of atom and molecule all reduces greatly; Therefore; In the reaction system of the present invention; Silver ion; The reducing agent molecule all reduces with the migration rate of the silver powder particles that reaction generates greatly; The speed that the silver atoms that reaction is generated is piled up each other significantly reduces; The structure cell growth rate of silver powder particles is effectively controlled; Simultaneously; Also can effectively stop the reunion of silver powder particles; Thereby, both can effectively control the structure cell particle diameter of silver powder particles, can effectively control the grain diameter of silver powder particles again;
2, under the situation that surfactant exists; Generate the silver powder particles surface be easy to the absorption surface active agent molecule; This suction-operated can effectively suppress the structure cell growth rate of silver powder particles; Also can effectively stop the reunion of silver powder particles; Therefore; There is the structure cell particle diameter that can effectively control silver powder particles in surfactant, also can effectively control the reunion of silver powder particles;
3, add the concentration that complexing agent can be controlled free silver ion in the reaction system, this can effectively control the growth rate of silver powder particles structure cell, thereby, can effectively control the structure cell particle diameter of silver powder particles;
4, when stirring, be easy to generate foam owing to contain the system of surfactant, the purpose of adding defoamer is to prevent that the whole preparation process process from producing foam, and assurance whole preparation process process is carried out smoothly;
5, the purpose of adding antioxidant is to prevent the silver powder particles surface oxidation that generates, to prepare the silver powder of surperficial non-oxidation;
6, the present invention is that preparation of raw material obtains viscous medium with surfactant, thickener, complexing agent, defoamer, antioxidant and deionized water; Have with deionized water and dilute the characteristics that viscosity is descended significantly a little; Therefore; Stir when adding silver salt at viscous medium; Add again reducing agent be stirred to react completely after; Adding the deionized water dilution again can make viscosity reduce greatly; Even dropping to closely with the viscosity of deionized water, this extremely helps separating through press filtration and obtains nano-silver powder;
7, viscous medium according to the invention, the characteristics that existing adding deionized water dilution can make viscosity descend have again the dilution heating is concentrated the characteristics that make viscosity recovery; Therefore; Stir when adding silver salt at viscous medium, the adding reducing agent is stirred to and reacts completely, and adds the deionized water dilution; After nano-silver powder is taken out in press filtration; Pressing filtering liquid can return to the preceding viscosity of dilution through concentrating, and can be recycled, and has both helped economizing on resources; Enhance productivity and economic benefit, help environmental protection again;
8, the raw material selected for use of the present invention is easy to get, production technology is brief, production efficiency is high, production cost is low, energy consumption is low, powder is difficult for reuniting, powder dispersity is good, be suitable for large-scale production, has solved the existing chemical preparation process of nano-silver powder easy oxidation that exists and the problem that is prone to reunite.
Prepare the method for nano-silver powder in a kind of viscous medium of the present invention, used surfactant is a lauryl sodium sulfate; Ammonium lauryl sulfate; Dodecyl sulphate potassium; Monoethanolamine dodecyl sulfate; The dodecyl sulphate diethanolamine salt; Dodecyltriethanolamine sulfate salt; Sodium hexadecyl sulfate; The hexadecyl hydrosulfate ammonium; Hexadecyl hydrosulfate potassium; The hexadecyl hydrosulfate monoethanolamine salt; The hexadecyl hydrosulfate diethanolamine salt; The hexadecyl hydrosulfate triethanolamine salt; The dodecyl polyethenoxy ether sodium sulfate; The dodecyl polyoxyethylene ether ammonium sulfate; Dodecyl APEO potassium sulfate; Dodecyl APEO sulfuric acid monoethanolamine salt; Dodecyl APEO sulfuric acid diethanolamine salt; Dodecyl APEO sulfuric acid triethanolamine salt; Sodium cetanesulfonate; The sodium cetanesulfonate ammonium; Sodium cetanesulfonate potassium; The sodium cetanesulfonate monoethanolamine salt; The sodium cetanesulfonate diethanolamine salt; The sodium cetanesulfonate triethanolamine salt; Neopelex; The DBSA ammonium; Potassium dodecylbenzenesulfonate; The DBSA monoethanolamine salt; The DBSA diethanolamine salt; The DBSA triethanolamine salt; Nonylphenol polyoxyethylene ether sulfate; The nonylphenol polyoxyethylene ether sulfate ammonium; Nonylphenol polyoxyethylene ether sulfate potassium; The nonylphenol polyoxyethylene ether sulfate monoethanolamine salt; The nonylphenol polyoxyethylene ether sulfate diethanolamine salt; The nonylphenol polyoxyethylene ether sulfate triethanolamine salt; The coconut oil alkanolamide; The dodecanamide propyl betaine; Cocoamidopropyl betaine; The soya-bean oil amido propyl betaine; In octadecyl dimethyl amine oxide and the DDAO any one or more.
The method for preparing nano-silver powder in a kind of viscous medium of the present invention, used thickener are any one or more in sodium carboxymethylcellulose, sodium polymethacrylate, Sodium Polyacrylate, the two stearates of Macrogol 6000 and the polyacrylamide.
The method for preparing nano-silver powder in a kind of viscous medium of the present invention, used complexing agent are any one or more in disodium EDTA, natrium citricum, potassium citrate, ammonium citrate, sodium tartrate, potassium tartrate and the ammonium tartrate.
The method for preparing nano-silver powder in a kind of viscous medium of the present invention, used defoamer are any one or two kinds of in polyoxyethyl propyl polyoxy ethyl glycerin ether and the dimethicone.
The method for preparing nano-silver powder in a kind of viscous medium of the present invention, used antioxidant are any one or more in BTA, methyl benzotriazazole, N-hydroxy benzo triazole, 1-hydroxy benzo triazole, 5-carboxy benzotriazole and the 4-hydroxy benzo triazole.
The method for preparing nano-silver powder in a kind of viscous medium of the present invention, used silver salt are any one or more in silver fluoride, silver nitrate, silver perchlorate, silver citrate, actol, silver tartrate, the silver acetate.
The method for preparing nano-silver powder in a kind of viscous medium of the present invention, used reducing agent are any one or more in formaldehyde, glucose, ascorbic acid, inferior sodium phosphate, hydrazine hydrate and the sodium borohydride.
The specific embodiment
Be the non-limiting example for preparing the method for nano-silver powder in a kind of viscous medium of the present invention below.Providing of these instances only is for illustrative purposes, can not be interpreted as qualification of the present invention.Because on the basis that does not break away from the spirit and scope of the present invention, can carry out many conversion to the present invention.In these embodiment, unless stated otherwise, all percentage all is meant mass percent.
Embodiment 1
Preparation technology: according to above-mentioned mass percent; With lauryl sodium sulfate; The dodecyl polyoxyethylene ether ammonium sulfate; The coconut oil alkanolamide; DDAO; Disodium EDTA; Sodium carboxymethylcellulose; Potassium tartrate; Dimethicone; BTA and deionized water mixing and stirring; Preparation obtains viscous medium; Adding silver fluoride stirs; After adding formaldehyde is stirred to and reacts completely; Be 1: 1.3 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Embodiment 2
Preparation technology: according to above-mentioned mass percent; With monoethanolamine dodecyl sulfate; The dodecyl polyethenoxy ether sodium sulfate; The coconut oil alkanolamide; The dodecanamide propyl betaine; Sodium polymethacrylate; Disodium EDTA; Ammonium tartrate; Polyoxyethyl propyl polyoxy ethyl glycerin ether; Methyl benzotriazazole and deionized water mixing and stirring; Preparation obtains viscous medium; Adding silver nitrate stirs; After adding formaldehyde and glucose are stirred to and react completely; Be 1: 1.4 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Embodiment 3
Preparation technology: according to above-mentioned mass percent; With sodium cetanesulfonate; The nonylphenol polyoxyethylene ether sulfate ammonium; Dodecyl APEO sulfuric acid triethanolamine salt; The coconut oil alkanolamide; Cocoamidopropyl betaine; Sodium Polyacrylate; Disodium EDTA; Sodium tartrate; Polyoxyethyl propyl polyoxy ethyl glycerin ether; N-hydroxy benzo triazole and deionized water mixing and stirring; Preparation obtains viscous medium; Adding silver perchlorate stirs; After the adding inferior sodium phosphate is stirred to and reacts completely; Be 1: 1.8 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Embodiment 4
Preparation technology: according to above-mentioned mass percent; With dodecyl sulphate potassium; Dodecyl APEO sulfuric acid monoethanolamine salt; The coconut oil alkanolamide; The soya-bean oil amido propyl betaine; Octadecyl dimethyl amine oxide; The two stearates of Macrogol 6000; Disodium EDTA; Ammonium citrate; Polyoxyethyl propyl polyoxy ethyl glycerin ether; Dimethicone; 1-hydroxy benzo triazole and deionized water mixing and stirring; Preparation obtains viscous medium; Adding silver fluoride and silver citrate stirs; After the adding hydrazine hydrate is stirred to and reacts completely; Be 1: 1.1 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Embodiment 5
Preparation technology: according to above-mentioned mass percent; With dodecyltriethanolamine sulfate salt; Dodecyl APEO potassium sulfate; The nonylphenol polyoxyethylene ether sulfate monoethanolamine salt; The coconut oil alkanolamide; The soya-bean oil amido propyl betaine; DDAO; Polyacrylamide; Disodium EDTA; Potassium citrate; Dimethicone; 5-carboxy benzotriazole and deionized water mixing and stirring; Preparation obtains viscous medium; Adding silver acetate stirs; After the adding sodium borohydride is stirred to and reacts completely; Be 1: 0.9 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Embodiment 6
Preparation technology: according to above-mentioned mass percent; With sodium hexadecyl sulfate; Neopelex; The nonylphenol polyoxyethylene ether sulfate diethanolamine salt; The coconut oil alkanolamide; Octadecyl dimethyl amine oxide; Sodium polymethacrylate; The two stearates of Macrogol 6000; Disodium EDTA; Natrium citricum; Polyoxyethyl propyl polyoxy ethyl glycerin ether; Dimethicone; 4-hydroxy benzo triazole and deionized water mixing and stirring; Preparation obtains viscous medium; Adding silver tartrate stirs; After adding formaldehyde is stirred to and reacts completely; Be 1: 0.7 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Embodiment 7
Preparation technology: according to above-mentioned mass percent; With nonylphenol polyoxyethylene ether sulfate; The DBSA triethanolamine salt; The DBSA ammonium; The coconut oil alkanolamide; Octadecyl dimethyl amine oxide; Sodium carboxymethylcellulose; The two stearates of Macrogol 6000; Disodium EDTA; Polyoxyethyl propyl polyoxy ethyl glycerin ether; BTA and deionized water mixing and stirring; Preparation obtains viscous medium; Adding silver acetate and actol stirs; After the adding inferior sodium phosphate is stirred to and reacts completely; Be 1: 1.5 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Embodiment 8
Preparation technology: according to above-mentioned mass percent; With the nonylphenol polyoxyethylene ether sulfate triethanolamine salt; Sodium cetanesulfonate potassium; The cetyl ichthyodin; The coconut oil alkanolamide; DDAO; Polyacrylamide; Sodium Polyacrylate; Disodium EDTA; Potassium tartrate; Polyoxyethyl propyl polyoxy ethyl glycerin ether; Dimethicone; Methyl benzotriazazole and deionized water mixing and stirring; Preparation obtains viscous medium; Adding silver nitrate and silver tartrate stirs; After the adding sodium borohydride is stirred to and reacts completely; Be 1: 0.8 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
Claims (9)
1. prepare the method for nano-silver powder in the viscous medium, it is characterized in that the technical scheme that adopts is:
According to surfactant; Thickener; Complexing agent; Defoamer; Antioxidant; Silver salt; The mass percent of reducing agent and deionized water is (0.001%～95%): (0.001%～95%): (0.001%～80%): (0.001%～75%): (0.001%～70%): (0.001%～75%): (0.001%～70%): the ratio of (0.001%～98%); Use surfactant; Thickener; Complexing agent; Defoamer; Antioxidant and deionized water preparation obtain viscous medium; Adding silver salt stirs; After the adding reducing agent is stirred to and reacts completely; Be 1: 0.5～10 ratio again according to the mass ratio of above-mentioned all material total amounts and deionized water; Adding the deionized water dilution reduces viscosity; Through press filtration; The deionized water washing; Washing with acetone and vacuum drying promptly obtain nano-silver powder, and pressing filtering liquid recycles after concentrating.
2. preparation method as claimed in claim 1 has following characteristics:
1. with surfactant; Thickener; Complexing agent; Defoamer; The good deionized water of antioxidant is in the viscous medium of preparation of raw material; Ion; The migration rate of atom and molecule all reduces greatly; Therefore; In the reaction system of the present invention; Silver ion; The reducing agent molecule all reduces with the migration rate of the silver powder particles that reaction generates greatly; The speed that the silver atoms that reaction is generated is piled up each other significantly reduces; The structure cell growth rate of silver powder particles is effectively controlled; Simultaneously; Also can effectively stop the reunion of silver powder particles; Thereby, both can effectively control the structure cell particle diameter of silver powder particles, can effectively control the grain diameter of silver powder particles again;
2. under the situation that surfactant exists; Generate the silver powder particles surface be easy to the absorption surface active agent molecule; This suction-operated can effectively suppress the structure cell growth rate of silver powder particles; Also can effectively stop the reunion of silver powder particles; Therefore; There is the structure cell particle diameter that can effectively control silver powder particles in surfactant, also can effectively control the reunion of silver powder particles;
3. add complexing agent and can control in the reaction system concentration of free silver ion, this can effectively control the growth rate of silver powder particles structure cell, thereby, can effectively control the structure cell particle diameter of silver powder particles;
4. when stirring, be easy to generate foam owing to contain the system of surfactant, the purpose of adding defoamer is to prevent that the whole preparation process process from producing foam, and assurance whole preparation process process is carried out smoothly;
The purpose of 5. adding antioxidant is to prevent the silver powder particles surface oxidation that generates, to prepare the silver powder of surperficial non-oxidation;
6. the present invention is that preparation of raw material obtains viscous medium with surfactant, thickener, complexing agent, defoamer, antioxidant and deionized water; Have with deionized water and dilute the characteristics that viscosity is descended significantly a little; Therefore; Stir when adding silver salt at viscous medium; Add again reducing agent be stirred to react completely after; Adding the deionized water dilution again can make viscosity reduce greatly; Even dropping to closely with the viscosity of deionized water, this extremely helps separating through press filtration and obtains nano-silver powder;
7. viscous medium according to the invention, the characteristics that existing adding deionized water dilution can make viscosity descend have again the dilution heating is concentrated the characteristics that make viscosity recovery; Therefore; Stir when adding silver salt at viscous medium, the adding reducing agent is stirred to and reacts completely, and adds the deionized water dilution; After nano-silver powder is taken out in press filtration; Pressing filtering liquid can return to the preceding viscosity of dilution through concentrating, and can be recycled, and has both helped economizing on resources; Enhance productivity and economic benefit, help environmental protection again;
8. the raw material selected for use of the present invention is easy to get, production technology is brief, production efficiency is high, production cost is low, energy consumption is low, powder is difficult for reuniting, powder dispersity is good, be suitable for large-scale production, has solved the existing chemical preparation process of nano-silver powder easy oxidation that exists and the problem that is prone to reunite.
3. preparation method as claimed in claim 1 is characterized in that used surfactant is a lauryl sodium sulfate; Ammonium lauryl sulfate; Dodecyl sulphate potassium; Monoethanolamine dodecyl sulfate; The dodecyl sulphate diethanolamine salt; Dodecyltriethanolamine sulfate salt; Sodium hexadecyl sulfate; The hexadecyl hydrosulfate ammonium; Hexadecyl hydrosulfate potassium; The hexadecyl hydrosulfate monoethanolamine salt; The hexadecyl hydrosulfate diethanolamine salt; The hexadecyl hydrosulfate triethanolamine salt; The dodecyl polyethenoxy ether sodium sulfate; The dodecyl polyoxyethylene ether ammonium sulfate; Dodecyl APEO potassium sulfate; Dodecyl APEO sulfuric acid monoethanolamine salt; Dodecyl APEO sulfuric acid diethanolamine salt; Dodecyl APEO sulfuric acid triethanolamine salt; Sodium cetanesulfonate; The sodium cetanesulfonate ammonium; Sodium cetanesulfonate potassium; The sodium cetanesulfonate monoethanolamine salt; The sodium cetanesulfonate diethanolamine salt; The sodium cetanesulfonate triethanolamine salt; Neopelex; The DBSA ammonium; Potassium dodecylbenzenesulfonate; The DBSA monoethanolamine salt; The DBSA diethanolamine salt; The DBSA triethanolamine salt; Nonylphenol polyoxyethylene ether sulfate; The nonylphenol polyoxyethylene ether sulfate ammonium; Nonylphenol polyoxyethylene ether sulfate potassium; The nonylphenol polyoxyethylene ether sulfate monoethanolamine salt; The nonylphenol polyoxyethylene ether sulfate diethanolamine salt; The nonylphenol polyoxyethylene ether sulfate triethanolamine salt; The coconut oil alkanolamide; The dodecanamide propyl betaine; Cocoamidopropyl betaine; The soya-bean oil amido propyl betaine; In octadecyl dimethyl amine oxide and the DDAO any one or more.
4. preparation method as claimed in claim 1 is characterized in that used thickener is any one or more in sodium carboxymethylcellulose, sodium polymethacrylate, Sodium Polyacrylate, the two stearates of Macrogol 6000 and the polyacrylamide.
5. preparation method as claimed in claim 1 is characterized in that used complexing agent is any one or more in disodium EDTA, natrium citricum, potassium citrate, ammonium citrate, sodium tartrate, potassium tartrate and the ammonium tartrate.
6. preparation method as claimed in claim 1 is characterized in that used defoamer is any one or two kinds of in polyoxyethyl propyl polyoxy ethyl glycerin ether and the dimethicone.
7. preparation method as claimed in claim 1 is characterized in that used antioxidant is any one or more in BTA, methyl benzotriazazole, N-hydroxy benzo triazole, 1-hydroxy benzo triazole, 5-carboxy benzotriazole and the 4-hydroxy benzo triazole.
8. preparation method as claimed in claim 1 is characterized in that used silver salt is any one or more in silver fluoride, silver nitrate, silver perchlorate, silver citrate, actol, silver tartrate, the silver acetate.
9. preparation method as claimed in claim 1 is characterized in that used reducing agent is any one or more in formaldehyde, glucose, ascorbic acid, inferior sodium phosphate, hydrazine hydrate and the sodium borohydride.
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| CN106623971A (en) * | 2016-12-08 | 2017-05-10 | 中国科学院深圳先进技术研究院 | Nano-silver particles for conductive ink and preparation method of nano-silver particles |
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