Dielectric properties of relaxor ceramics BBT

resumo

In this paper we report the dielectric investigation results of BaBi2Ta2O9 (BBT) ceramics performed in a broad frequency and temperature range. It is shown, that this ceramics possesses the ferroelectric relaxor behaviour. A very diffuse phase transition is observed in the whole measured temperature range and the dielectric permittivity exhibits a strong dispersion in the frequency range from Hz to microwaves where the maximum of permittivity, T-max, shifts to higher temperature as the frequency increases. From the frequency dependences of the real and imaginary parts of dielectric permittivity the parameters of dielectric dispersion have been calculated.

palavras-chave

CRYSTAL; BA

categoria

Materials Science; Physics

autores

Keburis, P; Banys, J; Grigas, J; Bortkevic, Z; Kholkin, A; Costa, MEV

nossos autores

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