Artículos de revistas
Pb0.90Ba0.10Zr0.40Ti0.60O3 Nanostructured Ferroelectric Ceramics Prepared by Spark Plasma Sintering
Fecha
2012Registro en:
FERROELECTRICS, ABINGDON, v. 429, n. 4, supl. 1, Part 3, pp. 69-74, APR, 2012
0015-0193
10.1080/00150193.2012.676958
Autor
Mesquita, Alexandre
Godart, Claude
Michalowicz, Alain
Mastelaro, Valmor Roberto
Institución
Resumen
Nanostructured Pb0.90Ba0.10Zr0.40Ti0.60O3 dense ceramics presenting an average grain size of 62 +/- 5 nm was prepared by the polymeric precursor method and using the spark plasma sintering technique. The dielectric permittivity curves versus temperature exhibit broad anomaly, indicative of a diffuse phase transition. This result can be explained by the spread of Curie temperatures which are expected to depend on the degree of tetragonality related to the grain size distribution. A pronounced decrease in the maximum of the dielectric permittivity value is attributed to the existence of a large amount of grain boundaries which are non-ferroelectric regions.