Structural characterization of bismuth rare earth tungstates obtained by
fast microwave-assisted solid-state synthesis
MATERIALS CHEMISTRY AND PHYSICS, 139 (2-3):
494-499 (2013)DOI: 10.1016/j.matchemphys.2013.01.047
Abstract
A new synthetic route was used to obtain bismuth rare earth tungstates: BiREWO6, where RE = Y, Gd and Nd. These materials were obtained by
microwave radiation in air at 900-1100 degrees C for 10 min, depend on
the rare earth composition in the ceramic. Structural characterization
was performed by X-ray powder diffraction, Infrared and Raman
spectroscopy. It was observed that all samples are isostructural
materials with monoclinic phase with space group A12/m1 and member of
the Aurivillius family, as Bi2WO6 ferroelectric phase. It was observed
moderated values for dielectric measurements (14 < epsilon(r)' > 19 and
0.018 < tg delta > 0.079) at microwaves frequencies, which can be used
as Dielectric Resonator Antenna or for size reduction of the electric
device. (C) 2013 Elsevier B.V. All rights reserved.