Structure, microstructure and dielectric properties of 100−x(Bi0.5Na0.5)TiO3−x[SrTiO3] composites ceramics

被引：0
作者：
B. Parija
S. K. Rout
L. S. Cavalcante
A. Z. Simões
S. Panigrahi
E. Longo
N. C. Batista
机构：
[1] NIT,Department of Physics
[2] PCE,Department of Physics
[3] BIT,Department of Applied Physics
[4] Mesra,Departamento de Química
[5] Universidade Estadual Paulista,undefined
[6] UESPI,undefined
[7] CCN,undefined
来源：
Applied Physics A | 2012年 / 109卷
关键词：
Dielectric Loss; Rietveld Refinement; Morphotropic Phase Boundary; Rhombohedral Structure; Distorted Octahedral;
D O I：
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学科分类号：
摘要：
In this paper, lead-free 100−x(Bi0.5Na0.5)TiO3−x[SrTiO3] composites ceramics with (0≤x≤9) were synthesized by the solid-state reaction method. Their structure, dielectric, ferroelectric and piezoelectric properties were investigated. X-ray diffraction patterns, Rietveld refinement data and Raman spectra revealed that the SrTiO3 cubic structure was completely diffused into the (Bi0.5Na0.5)TiO3 lattice with rhombohedral structure. The scanning electron microscopy images showed change in grain morphology from rectangular-like to quasi-spherical grain with increase in SrTiO3 content. The dielectric permittivity increases, the Curie temperature decreases and the peaks become broaden with raise of SrTiO3 content. Ferroelectric and piezoelectric properties of these composites ceramics showed degenerated behavior with increase of SrTiO3.
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页码：715 / 723
页数：8
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