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A Simple and Facile Iodination Method for Improving Sinterability and Electrical Conductivity of Silver Thick Films

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Abstract

Micro-sized silver powders were decorated with nano-scaled Ag/AgI clusters on the surface via a simple reaction with iodine and subsequent exposure to sunshine. Surface morphologies, crystal structures, and thermal properties of the powders were characterized. The powders with different mole ratios of I:Ag (0:100, 2:100, 10:100) were employed in silver pastes to evaluate sinterability and electrical conductivity of thick films. Microstructures and sheet resistance of the films were investigated by scanning electron microscopy and the four-point probe method. The particles coated with and without nano-sized Ag/AgI clusters showed different sintering behaviors. Moreover, clear necks were formed between the Ag particles with the ratio of 2:100 even at 570°C, whereas those untreated remained discrete. However, over-decoration lowered sinterability and electrical conductivity.

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Acknowledgements

The authors gratefully acknowledge the writing guidance from Prof. Feng Zheng and help in the experiment from Hongbo Tang and Gang Yang.

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Authors and Affiliations

  1. School of Material Science & Engineering, Central South University, Changsha, 410083, People’s Republic of China

    Jian Zhou, Weiping Gan, Yingfen Li, Lin Luo, Qiaoyun Pan & Zhijun Xiong

  2. College of Chemistry & Biology Engineering, Yichun University, Yichun, 336000, People’s Republic of China

    Jian Zhou

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  1. Jian Zhou
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  2. Weiping Gan
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  3. Yingfen Li
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  4. Lin Luo
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  5. Qiaoyun Pan
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  6. Zhijun Xiong
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Correspondence to Jian Zhou.

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Zhou, J., Gan, W., Li, Y. et al. A Simple and Facile Iodination Method for Improving Sinterability and Electrical Conductivity of Silver Thick Films. J. Electron. Mater. 43, 3389–3396 (2014). https://doi.org/10.1007/s11664-014-3260-9

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  • DOI: https://doi.org/10.1007/s11664-014-3260-9

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