Separation of piezoelectric grain resonance and domain wall dispersion in Pb(Zr,Ti)O3 ceramics

被引：52
|
作者：
Porokhonskyy, V. [1 ]
Jin, Li [1 ]
Damjanovic, D. [1 ]
机构：
[1] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Ceram Lab, CH-1015 Lausanne, Switzerland
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 21期
基金：
瑞士国家科学基金会;
关键词：
dielectric polarisation; dielectric resonance; electric domains; grain size; high-frequency effects; lead compounds; piezoceramics; zirconium compounds; FERROELECTRIC CERAMICS; DIELECTRIC-DISPERSION; BARIUM-TITANATE; SIZE;
D O I：
10.1063/1.3147166
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the experimental investigation of a high-frequency (1 MHz-1.8 GHz) dielectric dispersion in unpoled and poled Pb(Zr,Ti)O-3 ceramics. Two overlapping loss peaks could be revealed in the dielectric spectrum. The linear dependence between the lower-frequency peak position and average grain size D, which holds for D/<= 10 mu m, indicates that the corresponding polarization mechanism originates from piezoelectric resonances of grains. The intensity of the higher-frequency peak is drastically reduced by poling. It is thus proposed that this loss peak is related to domain wall contribution to the dielectric dispersion.
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页数：3
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