Study on the mechanism of forming silver nanoparticles on micron-scale flake silver powder
Due to the high conductivity and stability of silver, silver ink has been widely used in the field of printed electronics. However, since mechanical strain would cause the contact between key particles to be broken. Recently, higher requirements have been put on the bending resistance of silver past...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/abbafa |
| _version_ | 1827869448744206336 |
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| author | Lin Tang Guoyou Gan Xianglei Yu Chengbin Liu Junhua Cheng |
| author_facet | Lin Tang Guoyou Gan Xianglei Yu Chengbin Liu Junhua Cheng |
| author_sort | Lin Tang |
| collection | DOAJ |
| description | Due to the high conductivity and stability of silver, silver ink has been widely used in the field of printed electronics. However, since mechanical strain would cause the contact between key particles to be broken. Recently, higher requirements have been put on the bending resistance of silver paste. In this experiment, by preparing Ag NPs: Ag Flakes composite materials of 20:80 and 30:70 respectively, a new method for preparing stable modified flake silver powder is proposed, and the attachment and growth methods of Ag NPs reduced on micron flake silver powder is discussed. Flake silver powder, dispersant and reducing agent are added to the silver-ammonia complex, and the nano-silver particles are reduced on the flake silver powder by controlling the reaction conditions. When Ag ^+ : Ag Flakes in the solution is 30:70, there is a clear interface between the silver particles and the silver flakes, and the size distribution range is between 10 and 100 nm; when Ag ^+ : Ag Flakes is 20:80, the distance between the nano-silver particles and the silver plate crystal plane is about 0.222 nm and 0.260 nm, these spacings represent the (1–12) and (004) planes of Ag, respectively. The reduced silver particles grow on the surface of the silver sheet, the size is about 5 ∼ 60 nm, and form a sheet-point combination of shaped silver powder, which can be used to make conductive silver paste with cost and performance competitiveness. The reaction can be completed at room temperature (5 ∼ 25 °C) and atmospheric pressure (80 ∼ 100 kPa), the operation is simple, the reaction time is short, and it has a positive effect on the commercial production of printable highly conductive silver paste. |
| first_indexed | 2024-03-12T15:44:23Z |
| format | Article |
| id | doaj.art-baccdf455b654abd82439b592c668cfd |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:44:23Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-baccdf455b654abd82439b592c668cfd2023-08-09T15:50:18ZengIOP PublishingMaterials Research Express2053-15912020-01-0171010500110.1088/2053-1591/abbafaStudy on the mechanism of forming silver nanoparticles on micron-scale flake silver powderLin Tang0https://orcid.org/0000-0002-3920-0400Guoyou Gan1Xianglei Yu2Chengbin Liu3https://orcid.org/0000-0001-9835-6045Junhua Cheng4Faculty of Material Science and Engineering, Kunming University of Science and Technology , Kunming 650093, People’s Republic of ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology , Kunming 650093, People’s Republic of ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology , Kunming 650093, People’s Republic of ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology , Kunming 650093, People’s Republic of ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology , Kunming 650093, People’s Republic of ChinaDue to the high conductivity and stability of silver, silver ink has been widely used in the field of printed electronics. However, since mechanical strain would cause the contact between key particles to be broken. Recently, higher requirements have been put on the bending resistance of silver paste. In this experiment, by preparing Ag NPs: Ag Flakes composite materials of 20:80 and 30:70 respectively, a new method for preparing stable modified flake silver powder is proposed, and the attachment and growth methods of Ag NPs reduced on micron flake silver powder is discussed. Flake silver powder, dispersant and reducing agent are added to the silver-ammonia complex, and the nano-silver particles are reduced on the flake silver powder by controlling the reaction conditions. When Ag ^+ : Ag Flakes in the solution is 30:70, there is a clear interface between the silver particles and the silver flakes, and the size distribution range is between 10 and 100 nm; when Ag ^+ : Ag Flakes is 20:80, the distance between the nano-silver particles and the silver plate crystal plane is about 0.222 nm and 0.260 nm, these spacings represent the (1–12) and (004) planes of Ag, respectively. The reduced silver particles grow on the surface of the silver sheet, the size is about 5 ∼ 60 nm, and form a sheet-point combination of shaped silver powder, which can be used to make conductive silver paste with cost and performance competitiveness. The reaction can be completed at room temperature (5 ∼ 25 °C) and atmospheric pressure (80 ∼ 100 kPa), the operation is simple, the reaction time is short, and it has a positive effect on the commercial production of printable highly conductive silver paste.https://doi.org/10.1088/2053-1591/abbafasilver-ammonia complexflake silver powdernano-silver particles |
| spellingShingle | Lin Tang Guoyou Gan Xianglei Yu Chengbin Liu Junhua Cheng Study on the mechanism of forming silver nanoparticles on micron-scale flake silver powder Materials Research Express silver-ammonia complex flake silver powder nano-silver particles |
| title | Study on the mechanism of forming silver nanoparticles on micron-scale flake silver powder |
| title_full | Study on the mechanism of forming silver nanoparticles on micron-scale flake silver powder |
| title_fullStr | Study on the mechanism of forming silver nanoparticles on micron-scale flake silver powder |
| title_full_unstemmed | Study on the mechanism of forming silver nanoparticles on micron-scale flake silver powder |
| title_short | Study on the mechanism of forming silver nanoparticles on micron-scale flake silver powder |
| title_sort | study on the mechanism of forming silver nanoparticles on micron scale flake silver powder |
| topic | silver-ammonia complex flake silver powder nano-silver particles |
| url | https://doi.org/10.1088/2053-1591/abbafa |
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