Pb(Zr0.525Ti0.475)O3 piezoceramics, both unmodified and doped with 2 wt% Bi2O3 or Nb2O5, were prepared by the usual techniques, using sintering temperatures from 900° to 1250°C. The microstructural data showed that the sintering temperature which produces minimum porosity is altered by the oxide additions. X‐ray diffraction demonstrated the coexistence of both ferroelectric phases. The lattice parameter measurements showed that the tetragonal and rhombohedra1 unit cells of the two ferroelectric phases depend on the sintering temperature.
Mikrostrukturuntersuchungen an unmodifizierten und mit 2 Gew.‐% Bi2O3 und NbzOs dotierten Pb(Zr0‐525Tio‐475)O3‐Piezokeramiken, die bei unterschiedlichen Temp. im Bereich 900‐ 1250°C gesintert wurden, zeigen, daß die Porosität bei einer optimalen Sintertemp.
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