PZT prepared by spray drying: From powder synthesis to electromechanical properties

F. Bezzi, Anna L. Costa, D. Piazza, A. Ruffini, S. Albonetti, C. Galassi

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14 Citations (Scopus)

Abstract

A PZT niobium-doped material (PZTN) was developed from precursor powders obtained by spray drying of water solution of Zr and Pb nitrates, Ti isopropoxide and Nb-ammonium complex. The thermo-oxidative process as well as the phase evolution were analysed. The morphology of powders was investigated as a function of the spray-drying conditions. The stoichiometry of the systems was checked at each stage of the process and no fluctuation was detected. The obtained powders had a spherical, hollow and porous structure and were transformed into a pure perovskite phase at 550 °C. The samples, sintered at 1100 °C for 2 h in air showed 98% relative density at densification temperature of 100 °C lower than following the conventional mixed oxide route. The green and final densities were improved by introducing a grinding step and high pressure cold isostatic consolidation. Some sintered samples were fully densified by hot isostatic pressing (1100 °C, 300 bars) post-treatment, obtaining pore free structures. The electrical characterisation showed comparable or better properties than those obtained with the mixed oxide method. © 2004 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)3323 - 3334
Number of pages12
JournalJournal of the European Ceramic Society
Volume25
Issue number14
DOIs
Publication statusPublished - Sep 2005
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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