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Large electromechanical anisotropic modified lead titanate ceramics

Part 2 Dielectric, piezoelectric and mechanical properties

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Abstract

Dielectric, piezoelectric and mechanical properties of Pb0.88Ln0.88(Ti0.02Mn0.98)O3 and Pb0.76Ca0.24 ((Co0.5W0.5)0.04Ti0.96)O3 ceramics as a function of the tetragonality (c/a) have been investigated. The influence of the poling field on such properties was studied, and it was found that, generally, the electromechanical coupling factor thickness mode,K t, increases as the poling field was increased reaching a limiting value of 0.47 in the case of samarium-modified lead titanate (PT) (the highest value in the Ln-PT series), and ∼0.60 in the case of Ca-PT. The coupling factor planar mode,K p, became zero at 40kVcm−1 in Ca-PT, and almost zero in the case of Sm-PT at 60 kV cm−1. In the other members of Ln-PT,K p was lower than 10 to 15%. It was suggested that both the grain size and the 90° domain rotation, caused as a consequence of the strong poling field, could explain such a phenomenon.

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Authors and Affiliations

  1. Departamento de Materia les Cerámicos Especiales, Instituto de Cerámica y Vidrio (CSIC), Arganda del Rey, Madrid, Spain

    P. Duran, J. F. Fdez Lozano, F. Capel & C. Moure

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  1. P. Duran
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  2. J. F. Fdez Lozano
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  3. F. Capel
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  4. C. Moure
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Duran, P., Lozano, J.F.F., Capel, F. et al. Large electromechanical anisotropic modified lead titanate ceramics. J Mater Sci 24, 447–452 (1989). https://doi.org/10.1007/BF01107425

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  • DOI: https://doi.org/10.1007/BF01107425

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