原位中子衍射技术研究铁电体的极化行为

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE) Pub Date : 2012-09-01 DOI:10.1109/OMEE.2012.6464785

M. Hoelzel, M. Hinterstein, H. Kungl, W. Jo, H. Fuess,

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引用次数: 0

摘要

对高电场作用下的工业铁电陶瓷进行了中子衍射研究，建立了宏观极化行为与相应结构变化之间的关系。研究对象是具有取向相边界的镧掺杂锆钛酸铅(PLZT)的大块样品和钛酸铋钠基体系(BNT-BT-KNN)。在两种组成的BNT-BT-KNN体系中，大场诱导的宏观应变可以用极化过程中的相变来解释。研究了PLZT样品在不同电场方向下的畴切换和应变效应。

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Poling behaviour of technical ferroelectrics studied by in-situ neutron diffraction

Neutron diffraction studies on technical ferroelectric ceramics under the influence of high electric fields were performed to establish correlations between the macroscopic poling behaviour and corresponding structural changes. The investigations were carried out on bulk samples of lanthanum doped lead zirconate titanate (PLZT) with compositions around the morphotropic phase boundary and also on a bismuth sodium titanate based system (BNT-BT-KNN). In two compositions of the system BNT-BT-KNN, the large field induced macroscopic strain could be explained by a phase transformation during the poling process. PLZT samples were investigated under various orientations of the electric field to examine domain switching and strain effects.

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2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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