Artículos de revistas
Ferroelectric properties of Bi0.5(Na0.8K0.2)0.5TiO3 ceramics
Fecha
2014-07-18Registro en:
Camargo, Javier Eduardo; Ramajo, Leandro Alfredo; Rubio Marcos, Fernando; Castro, Miriam Susana; Ferroelectric properties of Bi0.5(Na0.8K0.2)0.5TiO3 ceramics; Trans Tech Publications; Advanced Materials Research; 975; 18-7-2014; 3-8
1662-8985
CONICET Digital
CONICET
Autor
Camargo, Javier Eduardo
Ramajo, Leandro Alfredo
Rubio Marcos, Fernando
Castro, Miriam Susana
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.