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Characterization of metal (Fe, Co, Ni, Cu) and fluorine codoped barium strontium titanate thick-films for microwave applications

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Abstract

The influence of codoping of Fe, Co, Ni, Cu as acceptors and F as donor on the dielectric properties of screen-printed Ba0.6Sr0.4TiO3 ceramic thick-films has been investigated. The undoped and codoped Ba0.6Sr0.4TiO3 powders were synthesized through a sol-gel route. The thermal gravimetric analysis revealed the difference of the thermal decomposition behaviour between the undoped and codoped precursors. The ceramic powders were characterized with x-ray diffraction, scanning electron microscopy and BET measurements. Larger crystallite sizes of the codoped powders were observed. The densification behaviour of the powders was recorded by dilatometry and indicated that codoping influences the sintering mechanism. The permittivity, dielectric loss and tunability of the undoped and codoped thick-films were characterized with coplanar waveguide structures up to 30 GHz.

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Acknowledgements

This work was supported in part by the German Research Foundation (DFG) Research Training Group 1037 Tunable Integrated Components in Microwave technology and Optics (TICMO).

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Authors and Affiliations

  1. Institute for Materials Research III, Forschungszentrum Karlsruhe GmbH, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopolshafen, Germany

    Xianghui Zhou, Holger Geßwein, Joachim R. Binder & Jürgen Haußelt

  2. Microwave Engineering, Darmstadt University of Technology, Merckstrasse 25, 64283, Darmstadt, Germany

    Xianghui Zhou, Mohsen Sazegar, Andre Giere & Rolf Jakoby

  3. Institute of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 102, 79110, Freiburg, Germany

    Florian Paul & Jürgen Haußelt

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  1. Xianghui Zhou
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  2. Holger Geßwein
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  4. Andre Giere
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  5. Florian Paul
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Correspondence to Xianghui Zhou.

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Zhou, X., Geßwein, H., Sazegar, M. et al. Characterization of metal (Fe, Co, Ni, Cu) and fluorine codoped barium strontium titanate thick-films for microwave applications. J Electroceram 24, 345–354 (2010). https://doi.org/10.1007/s10832-009-9580-0

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