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Title: Dielectric aging behavior in A-site hybrid-doped BaTiO<inf>3</inf>ceramics
Authors: T. Sareein
P. Baipaywad
W. Chaiammad
A. Ngamjarurojana
S. Ananta
X. Tan
R. Yimnirun
Keywords: Materials Science
Physics and Astronomy
Issue Date: 1-May-2011
Abstract: Hybrid-doped ferroelectric ceramics have recently been of great interest. Their electrical properties; however, remained mysterious, particularly the aging behavior. Therefore, the dielectric aging characteristics of the A-site hybrid-doped Na1+/Sm3+BaTiO3perovskite ceramics were investigated in this study. With the concentration of acceptor dopant (Na1+) fixed at 1 mol%, while that of the donor dopant (Sm3+) varied from 0.0 to 1.5 mol%, the hybrid-doped BaTiO3ceramics were prepared successfully by a conventional mixed-oxide method via vibro-milling technique. The results showed that the dielectric properties of all de-aged samples decreased noticeably with time. In all the samples with 0.5, 1.0 and 1.5 mol% Sm3+obviously the aging of dielectric constant and dielectric loss did not follow the conventional logarithmic law. The stretched exponential decay was found to suitably represent the aging behavior of these A-site hybrid-doped BaTiO3ceramics. A possibly cause of such behavior lies in the nature of relaxor-like behavior of these ceramics induced from a disruption of dipole ordering from Na1+/Sm3+substitution. © 2011 Elsevier B.V. All rights reserved.
ISSN: 15671739
Appears in Collections:CMUL: Journal Articles

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