Abstract
PZT powder of composition Pb(Zr0.65Ti0.355)O3 was prepared by mixing PbO with an adequate mixture of titanium and zirconium tetrabutoxides by blending. Dewatering of the coprecipitated powder in a controlled humidity atmosphere, and a precalcination treatment produced a highly sinterable PZT powder. When sintering of such a powder was performed at 1200° C in an air environment, highly densified bodies (99.5% theoretical density) were obtained. The use of very fine PZT powder, and a rigorous control of PbO losses seem to be the two main factors which enhance the densification process. The microstructure, grain size and electrophysical properties for the more dense PZT ceramic material are reported.
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