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Control of nanosilver sintering attained through organic binder burnout

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Abstract

Control of the low-temperature sintering of nanosilver particles was attained by dispersing and stabilizing nanosilver particles into a paste form using the selected organic binder systems. As demonstrated by scanning electron microscopy (SEM) and thermogravimetric analysis (TGA), with the existing binder systems, undesirable premature coalescence of nanosilver particles was prevented and the metastable structure was retained until the binder burned out at relatively higher temperatures. Enhanced densification was achieved upon the binder burnout because at the relatively higher temperatures the densification mechanisms, e.g., grain-boundary or lattice diffusion, become more dominant. We propose that the onset of sintering, extent of densification, and final grain size can be controlled by either the size of the initial nanosilver particles or the binder systems with different burnout characteristics.

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Acknowledgments

This research was supported mainly by the Engineering Research Center Program of the National Science Foundation under Award Number EEC-9731677 in the Center for Power Electronics Systems at Virginia Tech.

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Author notes

  1. John G. Bai

    Present address: Department of Mechanical Engineering, University of Washington, 352600 Campus Box, Seattle, WA, 98195, USA

Authors and Affiliations

  1. Center for Power Electronics Systems and Department of Materials Science and Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24061, USA

    John G. Bai & Jesus N. Calata

  2. Department of Materials Science and Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24061, USA

    Thomas G. Lei

  3. Center for Power Electronics Systems, Department of Materials Science and Engineering, and Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24061, USA

    Guo-Quan Lu

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  1. John G. Bai
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  2. Thomas G. Lei
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Correspondence to John G. Bai.

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Bai, J.G., Lei, T.G., Calata, J.N. et al. Control of nanosilver sintering attained through organic binder burnout. Journal of Materials Research 22, 3494–3500 (2007). https://doi.org/10.1557/JMR.2007.0440

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  • DOI: https://doi.org/10.1557/JMR.2007.0440

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