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Preparation and sintering properties in air of silver-coated copper powders and pastes

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Abstract

In this paper, uniform and well dispersed silver-coated copper powders were prepared by replacing reaction at first. The structure and properties of the bimetallic powders were investigated by XRD, SEM and TGA. It was found that anti-oxidization of the silver-coated copper powders increased with the increase of the silver content slightly and a dense coating surface was observed at Ag content of 53.9 wt%. Furthermore, the pastes with relatively low silver content which were prepared from silver-coated copper powders, displayed high conductivity similar to pure silver even after sintering in air. And their sintering properties were also investigated at different temperature in air atmosphere. The film exhibits good electrical properties at sintering temperature between 800 and 900 °C. When the paste from silver-coated copper powder with Ag content of 53.9 wt% was printed on Al2O3 substrate and sintered at 800 °C in air, the sheet resistance of the film is 0.036 Ω/□ only.

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Acknowledgments

The authors are grateful to Production and Research Prospective Joint Research Project of Jiangsu Province of China (BY2011153) and National Natural Science Foundation of China (Grant Nos. 61178057, 21002012) for financial supports.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China

    Min Wu, Baoping Lin, Yi Cao, Jiangang Song, Ying Sun, Hong Yang & Xueqin Zhang

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  1. Min Wu
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  2. Baoping Lin
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  3. Yi Cao
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  4. Jiangang Song
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  5. Ying Sun
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  6. Hong Yang
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  7. Xueqin Zhang
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Correspondence to Baoping Lin.

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Wu, M., Lin, B., Cao, Y. et al. Preparation and sintering properties in air of silver-coated copper powders and pastes. J Mater Sci: Mater Electron 24, 4913–4918 (2013). https://doi.org/10.1007/s10854-013-1497-3

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  • DOI: https://doi.org/10.1007/s10854-013-1497-3

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