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Irreversible increase in the temperature range of existence of the orthorhombic antiferroelectric phase in PbZr1 ? xTixO3 ceramics (0.02 ≤ x ≤ 0.05) |
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| Authors: | Yu N Zakharov A A Pavelko A G Lutokhin I N Andryushina V Z Borodin and L A Reznichenko |
| Institution: | (1) Department of Mechanical Engineering, Yonsei University, 134, Shinchon-dong, Seodaemun-gu, Seoul, South Korea;(2) Samsung Advanced Institute of Technology, 14-1, Nongsuh-ri, Kiheung-uep, Yongin-si, Kyungki-do, South Korea;(3) Seoul National University of Technology, Seoul, South Korea;(4) Present address: Materials Science Division, Argonne National Laboratory, Argonne, IL, USA; |
| Abstract: | The influence of thermostating at 450°C on the dielectric and pyroelectric properties of PbZr1 − x Ti x O3 polarized ferroelectric specimens the range 0.02 ≤ x ≤ 0.05 has been investigated. An irreversible increase in the temperature of the ferroelectric-antiferroelectric phase transition was observed in all specimens upon their cooling after exposure to an elevated temperature for more than 1 h. The original position of the phase-transition point on the temperature scale was not recovered as a result of afterpoling upon cooling through the Curie temperature. Heating of the same specimens in the bridged mode up to 650°C with subsequent abrupt immersion in silicone oil at room temperature (hardening) is accompanied by an additional increase in the range of existence of the antiferroelectric phase from 3 to 15°C with an increase in the x concentration. |
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