Synthesis and Characterization of Pyrochlore Lead Zinc Niobate Nanopowders Derived from Zn3Nb2O8 Precursor

Phakkhananan Pakawanit; Supon Ananta

doi:10.4028/www.scientific.net/AMR.194-196.704

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 194-196Synthesis and Characterization of Pyrochlore Lead...

Synthesis and Characterization of Pyrochlore Lead Zinc Niobate Nanopowders Derived from Zn₃Nb₂O₈ Precursor

Abstract:

A novel approach to synthesis cubic pyrochlore lead zinc niobate-based Pb_1.88Zn_0.3Nb_1.25O_5.305 nanopowders with a modified mixed-oxide method has been developed. To ensure a pure phase pyrochlore formation, an intermediate phase of Zn₃Nb₂O₈ was employed as key precursor. The formation of pyrochlore phase in the calcined lead zinc niobate powders has been examined as a function of firing temperature by a combination of TG-DTA and XRD techniques. The morphology evolution has been examined by SEM technique. It has been found that the unreacted PbO and Zn₃Nb₂O₈ phases tend to form together with lead zinc niobate, with the latter appearing in cubic phase. It is seen that optimization of firing temperature can lead to a single-phase Pb_1.88Zn_0.3Nb_1.25O_5.305 powders with average particle sizes ranging from 75-400 nm.

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Advanced Materials Research (Volumes 194-196)

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704-707

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https://doi.org/10.4028/www.scientific.net/AMR.194-196.704

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February 2011

Authors:

Phakkhananan Pakawanit, Supon Ananta

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Lead Zinc Niobate, Milling, Phase Formation, Powders-Solid-State Reaction, Pyrochlore

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