Structural and dielectric studies of ferroelectric or relaxor ceramics in the Ca1-xNax (Ti0.5Sn0.5)1-x NbxO3 system

被引：4
作者：
Aydi, Sarnia [1 ]
Nouiri, Mourad [2 ]
Aydi, Abdelhedi [1 ,2 ]
Khemakhem, Hanaadi [1 ]
机构：
[1] Univ Sfax, FSS, LR Phys Math & Applicat, LMF, Sfax 3018, Tunisia
[2] Univ Gabes, Fac Sci Gabes, Lab Phys Mat & Nanomat Appl Environm La Phy MNE, Gabes, Tunisia
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 10期
关键词：
Ceramic; Ferroelectric; Dielectric; Relaxor; Raman; ELECTRICAL-PROPERTIES; X-RAY; BEHAVIOR; RAMAN; CA;
D O I：
10.1016/j.ceramint.2015.07.156
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
New ternary lead free CaSnO3-CaTiO3-NaNbO3 (CSNNTx) ferroelectrics were prepared by a solid-state reaction method. The X-ray diffraction patterns at room temperature revealed a single phase perovskite crystallizing with cubic Pm3m group symmetry for x < 0.8 and in tetragonal group P4mm for x >= 0.8. The real part of the relative dielectric permittivity (epsilon(r)') exhibited a sharp peak with no frequency dependence which revealed a classical ferroelectric behavior for some compositions and ferroelectric relaxor behavior for others, with a diffuse phase transition and frequency dispersion. The ferroelectric behavior has been confirmed by hysteresis investigation. Raman spectra at room temperature shows a disorder introduced in this composition, thus favoring a ferroelectric relaxor behavior. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：13607 / 13613
页数：7
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