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Large electromechanical anisotropic modified lead titanate ceramics

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Abstract

Modified lead titanate (PT) oxalates were prepared by mixing an ethanol solution with (calcium, lanthanum, neodymium, samarium or gadolinium) and titanium with an ethanol solution of oxalic acid containing lead, and (cobalt and tungsten) or manganese by blending. The resulting complex oxalate, after washing with ethanol for several times, was an amorphous powder with a very fine particle size. The amorphous coprecipitate gave, on calcining, a high sinterable modified lead titanate powder of compositions (Pb0.76Ca0.24) ((Co0.5W0.5)004Ti0.96)O3 or (Pb0.88La0.08) (Ti0.98Mn0.02)O3 which, on sintering, produced highly densified bodies (⩾98% theoretical density) at relatively low temperatures (1100 and 1150°C for Ca-PT and Ln-PT, respectively). Linear thermal expansion measurements, microstructural development of the modified lead titanates, and the influence of grain size onc/a ratio have also been studied.

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Authors and Affiliations

  1. Departamento de Materiales Cerámicos Especiales, Instituto de Cerámica y Vidrio (CSIC), Arganda de 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., Fdez Lozano, J.F., Capel, F. et al. Large electromechanical anisotropic modified lead titanate ceramics. J Mater Sci 23, 4463–4469 (1988). https://doi.org/10.1007/BF00551945

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  • DOI: https://doi.org/10.1007/BF00551945

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