Publicação: Diffuse Effect of the Tungsten Doped Ba(Zr0.10Ti0.90)O3 Ferroelectric Ceramics
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Barium zirconate titanate Ba(Ti0.90Zr0.10)O3 ceramics doped with WO<inf>3</inf> (BZT:2W) have been prepared by a traditional solid phase reaction. The effect of temperature on the structural and electrical properties was investigated. X ray diffraction data evidenced formation of secondary phases for the samples sintered at 1300oC end 1350oC while the pure phase was attained at 1200oC. A modified Curie-Weiss law was used to describe the diffuseness of a phase transition. As temperature increases, the maximum dielectric permittivity decreased. The fine-grained sample showed a 'diffuse-like' ferroelectric behavior. The dielectric permittivity reaches a maximum value (εm ~6420 at 10 kHz) for the ceramics sintered at 1200oC for 4 hours.
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Barium zirconate titanates, Dielectric permittivities, Effect of temperature, Ferroelectric behavior, Solid phase reaction, Structural and electrical properties, Temperature increase, X-ray diffraction data, Barium zirconate, Electric properties, Exhibitions, Ferroelectric ceramics, Permittivity, Sintering, X ray diffraction, Zirconium, Ceramic materials
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Inglês
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11th International Conference and Exhibition of the European Ceramic Society 2009, v. 1, p. 376-380.
