The measurement results of permittivity, loss tangent, remanent polarization and electric conductivity of Pb(Zr0.52Ti0.48)O3 ceramics with La doping up to 10% are presented. The type of electric conductivity is determined by using the Seebeck coefficient measurement method. Marked decrease of electric conductivity has been found with increasing La content as well as the change of conductivity type in samples containing more than 7% of La.
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Wójcik et al. (1986) studied this question.
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