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PZT Ceramics Prepared from Two Phase Gels

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Abstract:

[Pb(Zr,Ti)(OAc)x(OR)y] acetate-alkoxide precursor was prepared by chelating from organic Pb, Zr and Ti alkoxides by their dissolution in various amounts of acetic acid (AcOH). The optimum mole ratio of (Pb+Zr+Ti) to AcOH for preparation gel is 1:7 and a pure perovskite phase is formed at 500 °C. At a low AcOH concentration, two-phase (pyrochlore and perovskite) regions are formed during gellation. During sintering, the decomposition of a pyrochlore phase and the formation of a perovskite phase takes place Dependences of dielectric permitivities and losses on temperature in final PZT ceramics were very similar and they were not influenced by the type of calcinate.

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Periodical:

Key Engineering Materials (Volume 290)

Pages:

353-357

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.290.353

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Online since:

July 2005

Authors:

J. Briančin, Ľubomír Medvecký, Helena Bruncková, M. Kmecová

Keywords:

(Pb,Zr,Ti)-Acetate Precursor, Dielectric Property, Pb(Zr0.53Ti0.47)O3, Polycondensation, PZT Powders, Sintering, Sol-Gel (SG)

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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