Infinite anisotropy of the piezoeffect in PbTiO3-based ferroceramic |
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| Authors: | E A Dul’kin L I Grebenkina D I Makar’ev A N Klevtsov V G Gavrilyachenko |
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| Affiliation: | (1) Research Institute of Mechanics and Applied Mathematics, Rostov State University, Rostov |
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| Abstract: | Acoustic emission, dilatometry, and optical microscopy were used to study the polarization of PKR-70 PbTiO3 ferroceramic samples. It was established that in an electric field higher than 2.5 kV/mm the piezoeffect in the samples acquires
an infinite anisotropy, accompanied by acoustic-emission and dilatometric anomalies. It is shown that this anisotropy of the
piezoeffect is caused by microcracking of the samples in the direction of the polarizing field.
Pis’ma Zh. Tekh. Fiz. 25, 21–25 (November 26, 1999) |
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