Formation and electrical characterization of Ti-modified Sr0.3Ba0.7Nb2O6 ceramic system
authors Perez, J; Amorin, H; M'Peko, JC; Portelles, J; Perez, JA; Guerrero, F
nationality International
journal MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
author keywords density; liquid phase; ferroelectrics; DPT
keywords DIFFUSE PHASE-TRANSITION; ABNORMAL GRAIN-GROWTH; DIELECTRIC-PROPERTIES; FERROELECTRIC CERAMICS; MICROSTRUCTURE; POLARIZATION; BEHAVIOR
abstract Titanium modified Sr0.3Ba0.7Nb2O6 ceramic system has been studied in a wide range of compositions. As the sintering temperature exceeds the 1250 degrees C, the substitution of niobium by titanium induces liquid phase formation, which enhances the densities of the samples with compositions in the monophasic range. X-ray diffraction analysis shows a linear titanium incorporation into the Sr0.3Ba0.7Nb2-yTiyO6-y/2 system up to a solubility limit 0.07 < y(m) < 0.1, which it is also confirmed by the ferroelectric-paraelectric temperature transition. Both, the diffuse character of the system and the dielectric constant at room temperature increase as the Ti content increase. The dielectric constant (epsilon(r) = 420) of the sample with a titanium content of 0.07 are two times higher than the reported for the SBN (30/70) system. (c) 2005 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0921-5107
year published 2006
volume 126
issue 1
beginning page 22
ending page 27
digital object identifier (doi) 10.1016/j.mseb.2005.07.004
web of science category Materials Science, Multidisciplinary; Physics, Condensed Matter
subject category Materials Science; Physics
unique article identifier WOS:000233982500003
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