Transparent ZnS Ceramics by Sintering of High Purity Monodisperse Nanopowders

Authors

  • Christophe Chlique,

    1. Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, Equipe Verres et Céramiques, Université de Rennes 1, Campus de Beaulieu, Rennes Cedex, France
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  • Odile Merdrignac-Conanec,

    Corresponding author
    • Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, Equipe Verres et Céramiques, Université de Rennes 1, Campus de Beaulieu, Rennes Cedex, France
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  • Noha Hakmeh,

    1. Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, Equipe Verres et Céramiques, Université de Rennes 1, Campus de Beaulieu, Rennes Cedex, France
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  • Xianghua Zhang,

    1. Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, Equipe Verres et Céramiques, Université de Rennes 1, Campus de Beaulieu, Rennes Cedex, France
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  • Jean-Luc Adam

    1. Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, Equipe Verres et Céramiques, Université de Rennes 1, Campus de Beaulieu, Rennes Cedex, France
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Author to whom correspondence should be addressed. e-mail: odile.merdrignac@univ-rennes1.fr

Abstract

We report an efficient way of preparing transparent ZnS ceramics using the hot-pressing technique. It has been found that the transparency is highly dependent on the purity and the grain size distribution of the starting ZnS powders. Highly pure and monodisperse ZnS powders have been obtained by posttreatment of the precipitated powders in a H2S/N2 flow for 2 h at 600°C. The obtained ZnS ceramics show fully dense and homogeneous microstructure with average grain size of ~1 μm and smooth grain boundaries, leading to an excellent transmission of around 70% in the mid- and far- IR regions. The preparation technique described in this study is highly reproducible.

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