Effect of urea on lead zirconate titanate-Pb(Zr0.52Ti0.48)O3-nanopowders synthesized by the Pechini method

PZT powders were synthesised by a chemical method using the conventional Pechini method and a urea-modified Pechini method, where the smooth pH increase, by the decomposition of urea, allows a better control of the pH. FTIR spectra showed that the precursor gel in the conventional Pechini method is...

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Veröffentlicht in:	Journal of the European Ceramic Society 2005-02, Vol.25 (5), p.743-748
Hauptverfasser:	ABREU, A. JR, ZANETTI, S. M, OLIVEIRA, M. A. S, THIM, G. P
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Chemical synthesis methods Cross-disciplinary physics: materials science rheology Electrotechnical and electronic ceramics Exact sciences and technology Materials science Methods of nanofabrication Nanopowders Nanoscale materials and structures: fabrication and characterization Physics Technical ceramics
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Zusammenfassung:	PZT powders were synthesised by a chemical method using the conventional Pechini method and a urea-modified Pechini method, where the smooth pH increase, by the decomposition of urea, allows a better control of the pH. FTIR spectra showed that the precursor gel in the conventional Pechini method is formed by a mixture of unidentade- and bridge-bonded complexes between the metallic cations and the citric acid. On the other hand, the precursor gel in the modified Pechini method is formed essentially by unidentade complexes. The modified Pechini method leads to homogeneous sub-micron spherical particles of 0.1 micron and a 7.4 m2/g surface area. 18 refs.
ISSN:	0955-2219 1873-619X
DOI:	10.1016/j.jeurceramsoc.2004.02.021