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Ionic doping effects on crystal structure and relaxation character in Bi0.5Na0.5TiO3 ferroelectric ceramics

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Abstract

The effects of ionic doping in Bi0.5Na0.5TiO3 (BNT) ceramics were investigated. Pure and doped BNT samples containing 0 to 16 at.% Ba2+ and 0 to 1.0 at.% Ce4+ were synthesized at 1135 to 1200 °C for 2 h in ambient atmosphere. Temperature dependences of dielectric properties were analyzed. These results suggest that Ba2+ and Ce4+ replace the ions in A and B sites of perovskite structures, and the lattice structure is altered. The component differences of each crystal domain lead to variance of phase transition temperature, which enhances the relaxation character in BNT ceramics, and the dielectric properties were consequently improved.

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Authors and Affiliations

  1. Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin, 300072, China

    Dan Shan, Yuanfang Qu & Jianjing Song

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  1. Dan Shan
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  2. Yuanfang Qu
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  3. Jianjing Song
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Correspondence to Dan Shan.

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Shan, D., Qu, Y. & Song, J. Ionic doping effects on crystal structure and relaxation character in Bi0.5Na0.5TiO3 ferroelectric ceramics. Journal of Materials Research 22, 730–734 (2007). https://doi.org/10.1557/jmr.2007.0082

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  • DOI: https://doi.org/10.1557/jmr.2007.0082

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