Structure and properties of (Na0.5Bi0.5)ZrO3 (NBZ) lead-free perovskite compound

被引：7
|
作者：
Lelievre, Jerome [1 ]
Josse, Michael [2 ]
Marchet, Pascal [1 ,3 ]
机构：
[1] Univ Limoges, IRCER, UMR 7315, F-87068 Limoges, France
[2] Univ Bordeaux, CNRS, ICMCB, UMR 5026, F-33600 Pessac, France
[3] CTTC, F-87068 Limoges, France
来源：
SCRIPTA MATERIALIA | 2019年 / 161卷
关键词：
Lead-free perovskite; Neutron diffraction; Crystal structure; Dielectric; Relaxor; FREE PIEZOELECTRIC CERAMICS; DIFFRACTION; POWDER; SYSTEM;
D O I：
10.1016/j.scriptamat.2018.10.003
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The structure of NBZ was studied by neutron diffraction. NBZ is monoclinic, (SG #11 P2(1)/m) a(m) = 5.696(8) angstrom, b(m) = 8.166(9) angstrom, c(m) = 5.790(4) angstrom and beta(m) = 89.97(4)degrees Being centrosymmetric, NBZ is neither piezoelectric nor ferroelectric. No phase transition was evidenced between 100 K and 923 K. NBZ presents a relaxor behavior below room temperature attributed to the mixed occupancy of the A-site by both Na+ and Bi3+ ions. The relative permittivity of NBZ appears noticeably stable (for 1 kHz 2.9% at 55 degrees C/218 K and +53% at 85 degrees C/358 K compared to the 25 degrees C/298 K value). NBZ appears thus as promising for the elaboration of capacitors requiring high thermal stability. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：13 / 17
页数：5
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