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Title: Influence of rare-earth dopants on barium titanate ceramics microstructure and corresponding electrical properties
Authors: Mitić V.
Nikolic, Zoran
Pavlović, Vladimir
Paunovic V.
Miljkovic M.
Jordović, Branka
Živkovic L.
Issue Date: 2010
Abstract: In this article, ytterbium and erbium oxides are used as doping materials for barium titanate (BaTiO3) materials. The amphoteric behavior of these rare-earth ions leads to the increase of dielectric permittivity and decrease of dielectric losses. BaTiO3 ceramics doped with 0.01-0.5 wt% of Yb2O3 and Er2O3 were prepared by conventional solid-state procedure and sintered at 1320°C for 4 h. In BaTiO3 doped with a low content of rare-earth ions (0.01 wt%) the grain size ranged between 10 and 25 μm. With the higher dopant concentration of 0.5 wt%, the abnormal grain growth is inhibited and the grain size ranged between 2 and 10 μm. The measurements of capacitance and dielectric losses as a function of frequency and temperature have been carried out in order to correlate the microstructure and dielectric properties of doped BaTiO 3 ceramics. The temperature dependence of the dielectric constant as a function of dopant amount has been investigated. © 2009 The American Ceramic Society.
Type: article
DOI: 10.1111/j.1551-2916.2009.03309.x
ISSN: 0002-7820
SCOPUS: 2-s2.0-73149102073
Appears in Collections:Faculty of Technical Sciences, Čačak

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