Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/27425
Title: Structural and transport characteristics of substituted bismuth niobates
Authors: Kaymieva, O. S.
Tarasova, O. A.
Shatokhina, A. N.
Buyanova, E. S.
Morozova, M. V.
Zhukovskii, V. M.
Issue Date: 2013
Citation: Structural and transport characteristics of substituted bismuth niobates / O. S. Kaymieva, O. A. Tarasova, A. N. Shatokhina [et al.] // Russian Journal of Electrochemistry. — 2013. — Vol. 49. — № 7. — P. 652-657.
Abstract: The results of studying solid solutions with the composition of Bi 3Nb1 - y Zr y O7 ± δ, Bi2.95Y0.05Nb1 - y Zr y O 7 ± δ (y = 0-0.5; Δy = 0.1), and Bi 6.95Y0.05Nb2 - y Zr y O 15.5 (y = 0.1-1; Δy = 0.1) are presented. XRD and electron microscopy with X-ray microanalysis are used to determine the homogeneity regions of solid solutions; crystallochemical parameters are calculated. It is shown that irrespective of the ratio of Bi: Nb, two cubic phases are formed at an increase in the dopant amount. One of these represents a solid solution based on Bi3NbO7 (δ-phase) and the second one is a solid solution based on δ-Bi2O3 (δ′-phase). Conductivity of sintered samples is studied using the impedance spectroscopy technique. Introduction of yttrium into the bismuth sublattice results in no increase in conductivity of solid solutions, while in the case of the ratio of Bi: Nb = 3: 1, overall conductivity of solid solutions is somewhat higher at similar dopant concentrations. © 2013 Pleiades Publishing, Ltd.
Keywords: BISMUTH NIOBATES
IMPEDANCE SPECTROSCOPY
OXYGEN-IONIC CONDUCTORS
DOPANT AMOUNT
DOPANT CONCENTRATIONS
HOMOGENEITY REGIONS
IMPEDANCE SPECTROSCOPY
NIOBATES
SINTERED SAMPLES
TRANSPORT CHARACTERISTICS
X-RAY MICROANALYSIS
BISMUTH
NIOBIUM OXIDE
SINTERING
SPECTROSCOPY
ZIRCONIUM
SOLID SOLUTIONS
URI: http://hdl.handle.net/10995/27425
SCOPUS ID: 84880273413
WOS ID: WOS:000321773800007
PURE ID: 897371
ISSN: 1023-1935
DOI: 10.1134/S1023193513070057
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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