Synthesis, structure, and impedance spectra of iron-containing bismuth titanates

• Published in: Russian journal of electrochemistry Vol. 49; no. 8; pp. 817 - 821
• Main Authors: Piir, I. V., Koroleva, M. S., Sekushin, N. A., Grass, V. E., Ryabkov, Yu. I.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-08-2013
• Subjects: Chemistry; Chemistry and Materials Science; Electrochemistry; Physical Chemistry; iron-containing bismuth titanate; impedance spectroscopy; pycnometry; pyrochlore structure; X-ray diffraction analysis
• ISSN: 1023-1935; 1608-3342
• DOI: 10.1134/S1023193513080168

Iron-containing bismuth titanates with a cubic pyrochlore Bi
1.6
Fe
x
Ti
2
O
7 − δ
structure were synthesized by the ceramic method. The region in which iron-containing pyrochlores are formed was determined. The pycnometric specific gravity of the samples was measured. Based on XRD and pycnometric specific gravity data, it was concluded that iron atoms lie in the bismuth sublattice. The electric properties of the materials were studied by high-temperature impedance spectroscopy. A strong effect of polarization on the impedance spectra was found.