Ferropiezoelectricity of calcium modified lead titanate ceramics |
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| Authors: | J Mendiola C Alemany L Pardo B Jiménez L Del Olmo E Maurer |
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| Affiliation: | (1) CSIC Serrano, Instituto de Ciencia de Materiales, 144 28006 Madrid, Spain |
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| Abstract: | When a ceramic with grain Boundaries rich in OPb is poled Beyond 4O kV cm–1 at ferroelectric phase, the highest anisotropy of electromechanical coupling factor is obtained. An attempt to explain this Behaviour is made in terms of domain switching and the strains and cracks generated during cooling down poling. Apart from composition, two more factors are revealed as contributing to the disappearance of radial coupling in Ca-modified lead titanate ceramics: microtexture and electric poling strategy. |
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