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Investigation of the physical properties of Bi1.5-xCdxZn0.92Nb1.5O6.92-x/2 pyrochlore ceramics

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Abstract

For the purpose of dielectric parameters tuning Bi1.5Zn0.92Nb1.5O6.92 (BZN) pyrochlore ceramics were subject to cadmium doping in accordance to the chemical formula; Bi1.5-xCdxZn0.92Nb1.5O6.92-x/2 for 0.10 ≤ x ≤ 0.50. The main physical properties of the doped samples were investigated by means of X-ray diffraction, scanning electron microscopy associated with energy dispersion spectroscopy, temperature dependent dielectric constant and temperature dependent electrical resistivity to obtain the crystalline structure, the lattice parameter, the relative density, the surface morphology and chemical composition. Optimization of single phase Cd doped samples were possible for x ≤ 0.14, beyond this limit, ZnO and Zn3Nb2O8 minor phases grow through the structure of the BZN. For samples which exhibit single BZN phase, the dielectric constant, the electrical resistivity and the resistivity activation energy increased with increasing Cd content. The maximum obtainable dielectric constant as 259 and 224 with high signal quality factor of 690 and 1090 at 25 and 200 °C, respectively, was for the sample doped with 0.14 Cd. These values are promising for implantation of BZN in RF and microwave technology as a resonator with high quality signal.

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Acknowledgments

We would like to give our great thanks to Marmara University Research Fund, Project No: (FEN-B-110411-0102) for financial support of this investigation. Thanks also go to the Arab American University Research fund for the financial support of electrical measurements.

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Authors and Affiliations

  1. Group of Physics, Faculty of Engineering, Atilim University, 06836, Ankara, Turkey

    A. F. Qasrawi

  2. Department of Physics, Arab-American University, Jenin, West Bank, Palestine

    A. F. Qasrawi, Bayan H. Kmail & Eman M. Nazzal

  3. Metallurgical and Materials Engineering Department, Marmara University, 34722, Istanbul, Turkey

    A. Mergen

Authors
  1. A. F. Qasrawi
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  2. Bayan H. Kmail
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  3. Eman M. Nazzal
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  4. A. Mergen
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Correspondence to A. F. Qasrawi.

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Qasrawi, A.F., Kmail, B.H., Nazzal, E.M. et al. Investigation of the physical properties of Bi1.5-xCdxZn0.92Nb1.5O6.92-x/2 pyrochlore ceramics. J Electroceram 31, 61–66 (2013). https://doi.org/10.1007/s10832-013-9809-9

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  • DOI: https://doi.org/10.1007/s10832-013-9809-9

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