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Abstract
The reaction sequence of PZT formation from the mixture of PbO-ZrO2-TiO2 has been extensively studied1-3. However, there have been no studies on the morphological changes occurring during the calcination process. The dependence of the characteristics and properties of the ceramic on the calcining conditions though has been well noted4–5, no systematic explanations have been given for the reasons of such dependencies.
Inhomogeneous sintering has been observed in PZT tapes and disks6 and was attributed to packing characteristics and chemical inhomogeneities. Earlier efforts to reactively sinter PZT ceramics from uncalcined oxide mixtures were in vain due to the “anomalous” expansion of the compacts during the sintering process7
The purpose of this study was to investigate the dilatometric behavior of the compacts during calcining and its influence of sintering and properties of PZT ceramics.