Ceramics-Silikáty 27, (3) 193 - 198 (1983)

The study revealed a substantial effect of non-compensated charged defects, resulting from the presence of heterovalent admixtures of MnO₂ and La₂O₃ oxides, on the final microstructure following the sintering of solid solutions based on Pb(Zr,Ti)O₃. Solid solutions of Pb(Zr,Ti)O₃ containing excess of charged point defects were found to be capable of sintering up to about 98 % of theoretical density. On the other hand, solid solutions based on Pb(Zr,Ti)O₃ free from heterovalent admixtu­res, or with electrically compensated admixtures of acceptor or donor type, showed extensive grain growth at sintering and were virtually uncapable of being sintered to an apparent density exceeding 95 % of theoretical density.