Bi4Ti3O12 ceramics from powders prepared by alternative routes: Wet no-coprecipitation chemistry and mechanochemical activation

Alguero M; Ferrer P; Vila E; Iglesias JE; Castro A

Journal of the American Ceramic Society, Vol.89, No.11, 3340-3347, 2006

DOI10.1111/j.1551-2916.2006.01234.x Export Citation

Bi4Ti3O12 ceramics from powders prepared by alternative routes: Wet no-coprecipitation chemistry and mechanochemical activation

Alguero M, Ferrer P, Vila E, Iglesias JE, Castro A

The 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 degrees 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 V-O(center dot center dot) are present at the pseudoperovskite [Bi2Ti3O10](2-) block in this case.