Abstract
Lanthanum modified lead zirconate with La to 8 at. % were prepared using mixed oxide method and followed by hot press sintering. The basic characterization included: dielectric spectroscopy, Sawyer–Tower polarization measurements, and temperature dependent selected area electron diffraction techniques. An intermediate rhombohedral ferroelectric phase (FER), characterized by square hysteresis loops, was found to exist in lead zirconate below the dielectric maximum. Strong 1/2{110} superlattice reflections associated with M-type oxygen octahedral rotation is found in the intermediate rhombohedral ferroelectric state. In addition, 1/x{110} incommensurate reflections were observed within a narrow temperature range between the FER phase and the low-temperature orthorhombic antiferroelectric state. With increasing La content, the temperature stability range of the incommensurate antiferroelectric phase was increased, at the expense of the FER phase. Incommensuration is suggested to result from a competition between ‘‘broken’’ dipolar and antiferroelectric sublattice interactions.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 9:24 a.m.) |
Deposited | 1 year, 7 months ago (Feb. 2, 2024, 10:59 a.m.) |
Indexed | 2 months, 4 weeks ago (June 3, 2025, 1:28 a.m.) |
Issued | 30 years, 3 months ago (May 15, 1995) |
Published | 30 years, 3 months ago (May 15, 1995) |
Published Print | 30 years, 3 months ago (May 15, 1995) |
@article{Dai_1995, title={Phase stability and transformations in pure and lanthanum modified lead zirconate ceramics}, volume={77}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.359317}, DOI={10.1063/1.359317}, number={10}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Dai, Xunhu and Xu, Z. and Viehland, Dwight}, year={1995}, month=may, pages={5086–5094} }