SEM, TEM and XRD Study of Sr and Nb Doped PZT Ceramics Obtained by Coprecipitation

摘要

The paper presents aspects of the microstructure and crystalline structure of a Pb_(1-x)Sr_x(Zr_(0.52)Ti_(0.48))_(1-y)Nb_yO_3 (x = 0.05-0.15; y = 0.01-0.05) - type ceramics obtained by coprecipitation. Investigations were made by SEM, TEM and XRD using samples sintered at different temperatures. The existence of moving twins corresponding to the ferroelectric domains was confirmed, with the twining planes being just the domain walls. Coexistence was proved for the two ferroelectric phases - one tetragonal and the other rhomboidal. Also, the influences of some technological parameters on the microstructure were established.