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Hydrothermal Synthesis and Characterization of Bi2Pb2O7 with Pyrochlore Structure

✍ Scribed by Yachun Mao; Guangshe Li; Yinyong Sun; Shouhua Feng

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
138 KB
Volume
149
Category
Article
ISSN
0022-4596

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✦ Synopsis

Pyrochlore Bi 2 Pb 2 O 7 was fabricated under low-temperature hydrothermal conditions and characterized by XRD, IR, SEM DTA+TG, and XPS. XRD analysis shows that the structure of Bi 2 Pb 2 O 7 is cubic, which is similar to that obtained from highpressure reactions. XPS measurements suggest that the valences of Bi and Pb ions are Ψ‰3 and Ψ‰4, respectively. The cubic Bi 2 Pb 2 O 7 is a metastable phase; it decomposes into a new phase with liberation of O 2 at 4503C.

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