Influence of zirconium addition on final properties of K0.5Na0.5NbO3-based ceramics

被引：0
|
作者：
L. Ramajo
J. Taub
M. S. Castro
机构：
[1] CONICET-UNMdP,Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA)
来源：
Journal of Materials Science: Materials in Electronics | 2014年 / 25卷
关键词：
Zirconium; Glassy Phase; Transient Liquid Phase; ZrO2 Particle; Perovskite Lattice;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Microstructure, electrical and dielectric properties of K1/2Na1/2NbO3 (KNN) modified with ZrO2 were investigated. Powders were obtained by a conventional solid-state method. Samples doped with 0–2 mol% of ZrO2 were sintered at 1,125 °C for 2 h. Through XRD spectra, the perovskite structure was observed, in addition to small peaks corresponding to secondary phases. It was also determined that zirconium drastically changed the microstructure and grain size of KNN ceramics. The addition of upto 1.0 mol% of Zr4+ produced a softening effect in the ferroelectric properties of the material, and increased its density. Conversely, samples prepared with contents higher than 1.0 mol% reduced piezoelectric and dielectric properties.
引用
收藏
页码：168 / 173
页数：5
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