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Bi4Ti3O12 Ceramics from Powders Prepared by Alternative Routes: Wet No-Coprecipitation Chemistry and Mechanochemical Activation

AuthorsAlgueró, Miguel ; Ferrer, P.; Vila Pena, Eladio ; Iglesias Pérez, Juan Eugenio ; Castro, Alicia
Issue Date2006
PublisherJohn Wiley & Sons
CitationJ. Am. Ceram. Soc., 89 [11] 3340–3347 (2006)
AbstractThe processing of ferroelectric Bi4Ti3O12 ceramics from powders prepared by wet no-coprecipitation chemistry (WNCC) and mechanochemical activation (MCA) has been investigated. Dense ceramics were obtained at sintering temperatures as low as 900°C. Exaggerated grain growth was observed for samples from WNCC, but not for those from MCA. Dielectric properties are discussed in relation to the type and concentration of defects, which is smaller for ceramic samples from WNCC. The activation energy of the dielectric relaxation for ceramics from MCA suggests that additional VO•• are present at the pseudoperovskite [Bi2Ti3O10]2− block in this case.
Publisher version (URL)doi:10.1111/j.1551-2916.2006.01234.x
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