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Structural, dielectric, and optical properties of the zinc tungstate ZnWO4 compound

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Abstract

Structural, thermal, morphological and optical properties of ZnWO4 sample were investigated by X-ray diffraction, atomic force microscopy, scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy analyses (EDX) and spectroscopic ellipsometry (SE). Electrical properties of the ZnWO4 compound were studied using complex impedance spectroscopy in the frequency range 200 Hz–5 MHz and temperature range 484–593 K. Temperature dependence of d.c. and a.c. conductivity indicates that electrical conduction in the material is a thermally activated process. The objective of the present work is to investigate the thicknesses and optical constants of ZnWO4 sample prepared by hydrothermal process using SE by new amorphous dispersion formula in the spectral wavelength range of 200–2200 nm. The results of the optical constants were extracted from SE measurements for the ZnWO4 sample experimentally (EXP) and theoretically (FIT), showed an excellent agreement.

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Acknowledgements

Authors are grateful to Nicolas Mercier, Magali Allain for providing the necessary facilities for XRD studies. Also; to Sylvie DABOS SEIGNON from MOLTECH-Anjou for AFM image and to Romain Mallet from SCIAM-Microscopy for SEM, TEM and EDX measurements. We would like to thank Jean-Paul Gaston and Celine Eypert from JobinYvon Horiba Company for the spectroscopic ellipsometry measurements and to Cecile Mézière, Valerie BONNIN for the help with the chemicals and corresponding equipment’s.

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Authors and Affiliations

  1. Laboratory of Spectroscopic Characterization and Optical Materials, Faculty of Sciences, University of Sfax, B.P. 1171, 3000, Sfax, Tunisia

    F. Dkhilalli, S. Megdiche Borchani, K. Guidara & M. Megdiche

  2. MOLTECH-Anjou, University of Angers/UMR CNRS 6200, 2 Bd Lavoisier, 49045, Angers, France

    F. Dkhilalli, M. Rasheed & R. Barille

  3. Higher Institute of Computing and Multimedia of Sfax (ISIMS), Technological Center of Sfax, BP 242, SakietEzzit, 3021, Sfax, Tunisia

    S. Megdiche Borchani

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  1. F. Dkhilalli
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Correspondence to F. Dkhilalli or S. Megdiche Borchani.

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Dkhilalli, F., Borchani, S.M., Rasheed, M. et al. Structural, dielectric, and optical properties of the zinc tungstate ZnWO4 compound. J Mater Sci: Mater Electron 29, 6297–6307 (2018). https://doi.org/10.1007/s10854-018-8609-z

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  • DOI: https://doi.org/10.1007/s10854-018-8609-z

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