Journal
FERROELECTRICS
Volume 429, Issue -, Pages 69-74Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00150193.2012.676958
Keywords
PZT; PBZT; diffuse phase transition; spark plasma sintering
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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.
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