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Stoichiometry and doping mechanism of the cubic pyrochlore phase in the system Bi2O3–ZnO–Nb2O5


Citation

Tan, Kar Ban and Lee, C. K. and Zainal, Zulkarnain and Miles, Gabrielle C. and West, Anthony Roy (2005) Stoichiometry and doping mechanism of the cubic pyrochlore phase in the system Bi2O3–ZnO–Nb2O5. Journal of Materials Chemistry, 15 (34). pp. 3501-3506. ISSN 0959-9428; ESSN: 1364-5501

Abstract / Synopsis

The subsolidus phase diagram of the system Bi2O3–ZnO–Nb2O5 in the region of the cubic pyrochlore phase has been determined at 950 °C. This phase forms a solid solution area that does not include the so-called ideal composition P, Bi3Zn2Nb3O14. It may be described in terms of two compositional variables: ZnO deficiency compared to P together with variable Bi : Nb ratio. Density measurements, preliminary crystallographic studies and the phase diagram indicate the solid solutions to have general formula, Bi3+yZn2−xNb3−yO14−x−y: −0.11(1) ≤ y ≤ 0.14(1) and −0.03(1) ≤ x ≤ 0.31(1).


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1039/B505803C
Publisher: Royal Society of Chemistry
Keywords: Doping mechanism; Cubic pyrochlore phase; Stoichiometry
Depositing User: Nabilah Mustapa
Date Deposited: 12 Apr 2016 13:04
Last Modified: 12 Apr 2016 13:04
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1039/B505803C
URI: http://psasir.upm.edu.my/id/eprint/42228
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