INVESTIGADORES
RAMAJO leandro Alfredo
artículos
Título:
Ferroelectric properties of Bi0.5(Na0.8K0.2)0.5TiO3 ceramics
Autor/es:
JAVIER CAMARGO; LEANDRO ALDREDO RAMAJO; FERNANDO RUBIO-MARCOS; MIRIAM SUSANA CASTRO
Revista:
ADVANCED MATERIALS RESEARCH
Editorial:
Trans Tech Publications
Referencias:
Año: 2014 p. 3 - 8
ISSN:
1662-8985
Resumen:
Different processing conditions and the effect of secondary phases on ferroelectric properties of Bi0.5(Na0.8K0.2)0.5TiO3 (BNKT) are studied. Ceramic powders are prepared by solid state reaction and different sintering temperatures (temperatures between 1075 and 1150ºC) are analyzed. Finally, samples are characterized by X-ray diffraction, Raman microspectroscopy, Scanning Electron Microscopy, impedance spectroscopy, and density measurements. Through XRD patterns, the perovskite structure is stabilized; together with small peaks corresponding to a secondary phase associated with K2-xNaxTi6O13 phase. Moreover, the content of the secondary phase, d33 piezoelectric constant and dielectric properties increase with sintering temperature.