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Structure and dielectric properties of Cu and (K,Na) doped SrBi2Nb2O9 ferroelectric ceramics

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Abstract

Ferroelectric ceramics, SrBi2Nb2O9 (SBN), Sr0.8Cu0.2Bi2Nb2O9 (SCBN) and Sr0.8K0.1Na0.1Bi2Nb2O9 (SKNBN) were prepared by a solid state reaction process. X-ray diffraction analysis shows that the alkali and Cu almost diffuse into the SBN lattice to form a solid solution during sintering and some slight secondary phases was detected. The effect of alkali and Cu on dielectric properties of the SBN ceramics was discussed. The dielectric loss factor of (K,Na) doped SBN ceramics degraded considerably to 0.01 and their frequency and temperature stabilities were enhanced. The dielectric constant was enhanced by approximately 60% and the Curie temperature (Tc) was also improved for Cu doped SrBi2Nb2O9 ceramics.

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Acknowledgments

This work has been supported by the National Nature Science Foundation (50672075) and the Xi’an S&T Research Foundation (XA-AM-200608), the SRFDP (20050699011) and NCET Program of MOE, Fundamental Research Foundation (NPU-FFR-200703) of NPU, Aeronautic Science Foundation (2006ZF53068) of China.

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Pinyang Fang, Huiqing Fan, Laijun Liu, Jin Chen & Shaojun Qiu

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  1. Pinyang Fang
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  2. Huiqing Fan
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  3. Laijun Liu
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  4. Jin Chen
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Correspondence to Huiqing Fan.

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Fang, P., Fan, H., Liu, L. et al. Structure and dielectric properties of Cu and (K,Na) doped SrBi2Nb2O9 ferroelectric ceramics. J Electroceram 23, 52–55 (2009). https://doi.org/10.1007/s10832-008-9533-z

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  • DOI: https://doi.org/10.1007/s10832-008-9533-z

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