CN103433502A - High-dispersing silver powder and preparation method thereof - Google Patents
High-dispersing silver powder and preparation method thereof Download PDFInfo
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- CN103433502A CN103433502A CN2013103499746A CN201310349974A CN103433502A CN 103433502 A CN103433502 A CN 103433502A CN 2013103499746 A CN2013103499746 A CN 2013103499746A CN 201310349974 A CN201310349974 A CN 201310349974A CN 103433502 A CN103433502 A CN 103433502A
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Abstract
The invention discloses high-dispersing silver powder and a preparation method thereof. The high-dispersing silver powder is formed by 25-35% of bisphenol A type epoxy resin and 65-75% nano-silver layer coated at the face of the biphenol A type epoxy resin according to mass percent. The in-situ synthesized silver powder can be uniformly and compactly coated at the face of the biphenol A type epoxy resin, thus improving the dispersing stability of the nano-silver powder, reducing the use level of valuable metal silver powder and reducing the production cost; meanwhile, the high-dispersing silver powder is adopted as a conductive packing in conductive silver slurry, so higher conductivity can be realized under the condition of lower silver powder use level.
Description
Technical field
The invention belongs to the photovoltaic material preparing technical field, particularly a kind of high dispersive type silver powder and preparation method thereof.
Background technology
Silver powder and electric slurry thereof are a kind of noble metal powders be most widely used in electronics industry with the consumption maximum, are the key function materials of producing various electronic component products.The dispersion of silver powder in conductive silver paste is very important.Because the particle diameter of nano-silver powder is less, apparent activation energy is higher, the difficult dispersion, agglomeration easily occurs.
Therefore, how to improve the dispersion stabilization of nano-silver powder in the silver slurry is the focus of research always.Chinese patent (CN 101003907 B) discloses a kind of preparation method of metal and dielectric composite grains of silicon dioxide coated by Nano silver, it adopts ultrasonic electrochemical method one step Nano silver grain to be deposited to the surface of silica spheres, and its surface distributed is very even, there is prospects for commercial application preferably.
The present invention is coated on the bisphenol A type epoxy resin surface by original position synthesis of nano silver layer, can improve the dispersiveness of nano-silver powder in the silver slurry.
Summary of the invention
The present invention is directed to nano-silver powder in prior art exists the problem of easy reunion, bad dispersibility and a kind of high dispersive type silver powder is provided in the silver slurry.
Purpose of the present invention is achieved through the following technical solutions:
A kind of high dispersive type silver powder, by bisphenol A type epoxy resin and the nano-silver layer that is coated on the bisphenol A type epoxy resin surface, formed, it is characterized in that: by bisphenol A type epoxy resin and the nano-silver layer that is coated on the bisphenol A type epoxy resin surface, formed, press the mass percent ratio, described bisphenol A type epoxy resin accounts for 25～35%, nano-silver layer accounts for 65～75%.
Another object of the present invention is to provide a kind of method for preparing above-mentioned high dispersive type silver powder.
A kind of preparation method of high dispersive type silver powder, its concrete preparation process is: bisphenol A type epoxy resin is mixed with to 40%～60% bisphenol A type epoxy resin dispersion liquid, the liquor argenti nitratis ophthalmicus and the polyethylene of dispersing agent pyrrolidones that add 2mol/L, stir, be warming up to 40 ℃～60 ℃, then the reducing agent hydrazine hydrate solution that adds 0.5mol/L, under stirring condition, reaction 30～50min, the ammonia spirit regulation system pH value that is 2%～5% with mass fraction is 5～6, after completion of the reaction, product is through centrifugation, and wash 3～5 times with deionized water and ethanol, dry, prepare the nano-silver layer that is coated on the bisphenol A type epoxy resin surface, obtain high dispersive type silver powder, wherein the mass ratio of liquor argenti nitratis ophthalmicus and bisphenol A type epoxy resin dispersion liquid is 1～3:1, the mass ratio of polyvinylpyrrolidone and bisphenol A type epoxy resin dispersion liquid is 0.05～0.2:1, the mass ratio of hydrazine hydrate solution and liquor argenti nitratis ophthalmicus is 0.1～0.5:1.
Remarkable advantage of the present invention is:
But 1, be coated on the bisphenol A type epoxy resin surface the present invention's nano-silver powder even compact synthetic by original position, improved dispersiveness and the stability of nano-silver powder, reduce the consumption of noble metal silver powder, reduce production costs.
2, the present invention adopts high dispersive type silver powder as the conductive filler in conductive silver paste, can make in the situation that the silver powder consumption is lower, realizes higher conductance.
The specific embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
50 gram bisphenol A type epoxy resin E44 are dissolved in the mixed solvent of 300 gram toluene and butanone, toluene 200 grams wherein, butanone 100 grams, stir, make bisphenol A type epoxy resin E44 dispersion liquid, the liquor argenti nitratis ophthalmicus and the 2.5 gram polyethylene of dispersing agent pyrrolidones that add 50 gram 2mol/L, stir, be warming up to 40 ℃, then the hydrazine hydrate solution that adds 5 gram 0.5mol/L, under stirring condition, react 30 minutes, the ammonia spirit regulation system pH value that is 2% with mass fraction is 5, after completion of the reaction, product is through centrifugation, and wash 3 times with deionized water and ethanol, dry, prepare the nano-silver layer that is coated on bisphenol A type epoxy resin E44 surface, obtain high dispersive type silver powder.
Embodiment 2
50 gram bisphenol A type epoxy resin E51 are dissolved in the mixed solvent of 600 gram toluene and butanone, toluene 400 grams wherein, butanone 200 grams, stir; Make bisphenol A type epoxy resin E51 dispersion liquid, the liquor argenti nitratis ophthalmicus and the 10 gram polyethylene of dispersing agent pyrrolidones that add 150 gram 2mol/L, stir, be warming up to 60 ℃, then the hydrazine hydrate solution that adds 7.5 gram 0.5mol/L, under stirring condition, react 50 minutes, the ammonia spirit regulation system pH value that is 5% with mass fraction is 6, and after completion of the reaction, product is through centrifugation, and wash 3 times with deionized water and ethanol, dry, prepare the nano-silver layer that is coated on bisphenol A type epoxy resin E51, obtain high dispersive type silver powder.
Embodiment 3
50 gram bisphenol A type epoxy resin E55 are dissolved in the mixed solvent of 450 gram toluene and butanone, toluene 300 grams wherein, butanone 150 grams, stir; Make bisphenol A type epoxy resin E55 dispersion liquid, the liquor argenti nitratis ophthalmicus and the 5 gram polyethylene of dispersing agent pyrrolidones that add 100 gram 2mol/L, stir, be warming up to 60 ℃, then the hydrazine hydrate solution that adds 25 gram 0.5mol/L, under stirring condition, react 50 minutes, the ammonia spirit regulation system pH value that is 3% with mass fraction is 6, and after completion of the reaction, product is through centrifugation, and wash 4 times with deionized water and ethanol, dry, prepare the nano-silver layer that is coated on bisphenol A type epoxy resin E55 surface, obtain high dispersive type silver powder.
Claims (5)
1. a high dispersive type silver powder is characterized in that: be comprised of bisphenol A type epoxy resin and the nano-silver layer that is coated on the bisphenol A type epoxy resin surface, press the mass percent ratio, described bisphenol A type epoxy resin accounts for 25～35%, nano-silver layer accounts for 65～75%.
2. high dispersive type silver powder according to claim 1, it is characterized in that: described nano-silver layer is by liquor argenti nitratis ophthalmicus, the polyethylene of dispersing agent pyrrolidones synthesizes and makes through reducing agent hydrazine hydrate solution original position, its concrete preparation process is: bisphenol A type epoxy resin is mixed with to 40%～60% bisphenol A type epoxy resin dispersion liquid, the liquor argenti nitratis ophthalmicus and the polyethylene of dispersing agent pyrrolidones that add 2mol/L, stir, be warming up to 40 ℃～60 ℃, then the reducing agent hydrazine hydrate solution that adds 0.5mol/L, under stirring condition, reaction 30～50min, the ammonia spirit regulation system pH value that is 2%～5% with mass fraction is 5～6, after completion of the reaction, product is through centrifugation, and wash 3～5 times with deionized water and ethanol, dry, prepare the nano-silver layer that is coated on the bisphenol A type epoxy resin surface, obtain high dispersive type silver powder, wherein the mass ratio of liquor argenti nitratis ophthalmicus and bisphenol A type epoxy resin dispersion liquid is 1～3:1, the mass ratio of polyvinylpyrrolidone and bisphenol A type epoxy resin dispersion liquid is 0.05～0.2:1, the mass ratio of hydrazine hydrate solution and liquor argenti nitratis ophthalmicus is 0.1～0.5:1.
3. high dispersive type silver powder according to claim 1 and 2, it is characterized in that: described bisphenol A type epoxy resin is bisphenol A type epoxy resin E44, bisphenol A type epoxy resin E51 or bisphenol A type epoxy resin E55.
4. a method for preparing high dispersive type silver powder as claimed in claim 1, it is characterized in that: bisphenol A type epoxy resin is mixed with to 40%～60% bisphenol A type epoxy resin dispersion liquid, the liquor argenti nitratis ophthalmicus and the polyethylene of dispersing agent pyrrolidones that add 2mol/L, stir, be warming up to 40 ℃～60 ℃, then the reducing agent hydrazine hydrate solution that adds 0.5mol/L, under stirring condition, reaction 30～50min, the ammonia spirit regulation system pH value that is 2%～5% with mass fraction is 5～6, after completion of the reaction, product is through centrifugation, and wash 3～5 times with deionized water and ethanol, dry, prepare the nano-silver layer that is coated on the bisphenol A type epoxy resin surface, obtain high dispersive type silver powder, wherein the mass ratio of liquor argenti nitratis ophthalmicus and bisphenol A type epoxy resin dispersion liquid is 1～3:1, the mass ratio of polyvinylpyrrolidone and bisphenol A type epoxy resin dispersion liquid is 0.05～0.2:1, the mass ratio of hydrazine hydrate solution and liquor argenti nitratis ophthalmicus is 0.1～0.5:1.
5. the preparation method of a kind of high dispersive type silver powder according to claim 4, it is characterized in that: described bisphenol A type epoxy resin is bisphenol A type epoxy resin E44, bisphenol A type epoxy resin E51 or bisphenol A type epoxy resin E55.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103980665A (en) * | 2014-05-19 | 2014-08-13 | 上海维度化工科技有限公司 | Waterborne antibacterial composite material and preparation method thereof |
| CN104505142A (en) * | 2014-12-16 | 2015-04-08 | 安徽凤阳德诚科技有限公司 | Conductive silver paste |
| CN105665745A (en) * | 2016-04-10 | 2016-06-15 | 欧振云 | Preparation method of silver nanoparticles |
| CN106165024A (en) * | 2014-03-28 | 2016-11-23 | 三菱综合材料株式会社 | Conductive paste |
| CN109692971A (en) * | 2018-12-10 | 2019-04-30 | 太原氦舶新材料有限责任公司 | A kind of nano-silver powder and its preparation and the application in low-temperature cured conductive silver paste |
| CN114181586A (en) * | 2021-11-26 | 2022-03-15 | 洛阳双瑞防腐工程技术有限公司 | Water-based epoxy static-conducting oil-resistant anticorrosive paint and preparation method thereof |
| CN115673334A (en) * | 2022-10-26 | 2023-02-03 | 陕西煤业化工技术研究院有限责任公司 | Micro-nano silver dispersion and preparation method thereof |
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| CN101215450A (en) * | 2008-01-08 | 2008-07-09 | 上海大学 | Conductive adhesive added with short rod type nano silver powder and preparation method thereof |
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| CN102634312A (en) * | 2012-03-27 | 2012-08-15 | 烟台德邦电子材料有限公司 | Silvering powder conductive adhesive for LED packaging and production method thereof |
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| CN1939999A (en) * | 2005-09-27 | 2007-04-04 | 上海特视精密仪器有限公司 | Sliver-powder conducting glue and its production |
| CN101215450A (en) * | 2008-01-08 | 2008-07-09 | 上海大学 | Conductive adhesive added with short rod type nano silver powder and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106165024A (en) * | 2014-03-28 | 2016-11-23 | 三菱综合材料株式会社 | Conductive paste |
| US10332649B2 (en) | 2014-03-28 | 2019-06-25 | Mitsubishi Materials Corporation | Conductive paste |
| CN103980665A (en) * | 2014-05-19 | 2014-08-13 | 上海维度化工科技有限公司 | Waterborne antibacterial composite material and preparation method thereof |
| CN104505142A (en) * | 2014-12-16 | 2015-04-08 | 安徽凤阳德诚科技有限公司 | Conductive silver paste |
| CN105665745A (en) * | 2016-04-10 | 2016-06-15 | 欧振云 | Preparation method of silver nanoparticles |
| CN109692971A (en) * | 2018-12-10 | 2019-04-30 | 太原氦舶新材料有限责任公司 | A kind of nano-silver powder and its preparation and the application in low-temperature cured conductive silver paste |
| CN114181586A (en) * | 2021-11-26 | 2022-03-15 | 洛阳双瑞防腐工程技术有限公司 | Water-based epoxy static-conducting oil-resistant anticorrosive paint and preparation method thereof |
| CN115673334A (en) * | 2022-10-26 | 2023-02-03 | 陕西煤业化工技术研究院有限责任公司 | Micro-nano silver dispersion and preparation method thereof |
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Application publication date: 20131211 |