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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Phase transition and dielectric properties of (Pb,La)(Zr,Sn,Ti)O-3 ceramics at morphotropic phase boundary
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Phase transition and dielectric properties of (Pb,La)(Zr,Sn,Ti)O-3 ceramics at morphotropic phase boundary

机译：（Pb，La）（Zr，Sn，Ti）O-3陶瓷在同相相界处的相变和介电性能

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摘要

(Pb0.97La0.02)(Zr75Sn0.25-x Ti-x)O-3 (0.08 <= x <= 0.11) ceramics at morphotropic phase boundary (MPB) were fabricated by the conventional solid-state reactions, and the major phase was changed from tetragonal antiferroelectric phase to rhombohedral ferroelectric phase (AFE(T)-FER) as the increase of Ti/Sn. The dielectric properties in original states and the poled states were systematically studied. Dielectric constant of the electric-induced AFE(T) poled states was greater than the virgin state, then approached and become less as the compositions moved to FER phase. Moreover, there was a dielectric anomaly for FER poled sample on heating, but not observed in cooling cycle and AFE(T) sample, which was a FE-AFE phase transition confirmed by dielectric constant as functions of temperature and electric field, and the abnormal dielectric behavior become more obviously with electric field increasing. This results are useful to understand the dielectric properties and phase transition in AFE and FE materials. (C) 2016 Elsevier B.V. All rights reserved.
机译：（Pb0.97La0.02）（Zr75Sn0.25-x Ti-x）O-3（0.08 <= x <= 0.11）通过常规的固相反应制备了同相相界（MPB）上的陶瓷，主要随着Ti / Sn的增加，相从四方反铁电相变为菱面体铁电相（AFE（T）-FER）。系统地研究了原始态和极化态的介电性能。电诱导的AFE（T）极化态的介电常数大于原始态，然后随着组成移至FER相而趋近并变小。此外，加热时的FER极化样品存在介电异常，但在冷却循环和AFE（T）样品中未观察到，这是由介电常数随温度和电场而确定的FE-AFE相变，并且异常随着电场的增加，介电性能变得更加明显。此结果对于了解AFE和FE材料的介电性能和相变非常有用。 （C）2016 Elsevier B.V.保留所有权利。

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