INVESTIGADORES
RAMAJO leandro Alfredo
artículos
Título:
Influences of secondary phases on ferroelectric properties of Bi(Na,K)TiO3 ceramics
Autor/es:
LEANDRO RAMAJO; JAVIER CAMARGO; FERNANDO RUBIO-MARCOS; MIRIAM CASTRO
Revista:
CERAMICS INTERNATIONAL
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2015 vol. 41 p. 5380 - 5386
ISSN:
0272-8842
Resumen:
The effect of secondary phases on ferroelectric properties of Bi0.5(Na0.8K0.2)0.5 TiO3 (BNKT) is studied. Ceramic powders are prepared by the solid-state reaction method where the influence of different sintering temperatures is also studied. Then, samples are characterized by X-ray diffraction (XRD), Raman microspectroscopy, Scanning Electron Microscopy and impedance spectroscopy. Through XRD and Raman results, the perovskite structure is detected; together with small peaks corresponding to a secondary phase associated with a K2xNaxTi6O13-based phase. The secondary phases amount increases with the sintering temperature, yielding different combination so f K2xNaxTi6O13- and Bi0.5(Na1yKy)0.5TiO3-based phases. Moreover, the content of the secondary phase improves the d33 piezoelectric constant and dielectric properties of BNKT ceramics. These results can benefit the understanding of BNKT ceramics and the expanding of their applications range.
