INTEMA 05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
Influence of MoO3 on electrical and microstructural properties of (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3
Autor/es:
L. RAMAJO; M. CASTRO; F. RUBIO-MARCOS,; J. FERNANDEZ-LOZANO
Revista:
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2013 vol. 24 p. 3587 - 3593
ISSN:
0957-4522
Resumen:
Microstructure, piezoelectric properties and dielectric behavior of undoped and MoO3-doped lead-free (K0.44Na0.52Li0.04)(Nb0.86-xTa0.10-xSb0.04-x)Mo5/6xO3 were investigated. Samples were obtained by the conventional solid state reaction. X-ray diffraction (XRD) and Raman spectra revealed the formation of a perovskite phase, together with some minor secondary phase which could be assigned by XRD to K3LiNb6O17. XRD also showed that the perovskite evolved from a tetragonal to orthorhombic symmetry with the increased doping level. The temperature dependence on real permittivity revealed the presence of a diffuse phase transition. This behavior raised with MoO3 concentration. Also, dielectric relaxation processes were observed at room temperature resulting dependent on doping level and sintering time.
