Synthesis and Properties of Phases in the PbO–MO–Nb2O5 (M = Cu, Ni) Systems

In this paper, we report the solid-state synthesis, characterization, and physicochemical properties of Pb 4– x M x Nb 2 O 9 (M = Cu, Ni; x = 0–1.0) solid solutions. We have identified the stability limits of the solid solutions. Using the tolerance factor and relative electronegativities of the A-...

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Bibliographic Details
Published in:Inorganic materials 2018-07, Vol.54 (7), p.672-675
Main Authors: Podkorytov, A. L., Timofeev, A. L., Shevyakova, I. A., Mal’tseva, V. O., Shtin, S. A., Zabolotskikh, N. N.
Format: Article
Language:English
Subjects:
Chemical synthesis
Chemistry
Chemistry and Materials Science
Copper
Electric contacts
Electrical resistivity
Electrodes
Electronegativity
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Nickel
Niobium oxides
Perovskites
Response time
Solid solutions
Stability
X-ray diffraction
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Summary:In this paper, we report the solid-state synthesis, characterization, and physicochemical properties of Pb 4– x M x Nb 2 O 9 (M = Cu, Ni; x = 0–1.0) solid solutions. We have identified the stability limits of the solid solutions. Using the tolerance factor and relative electronegativities of the A- and B-site atoms (A 4 B 2 O 9 ), we have identified the stability fields of the perovskite-related solid solutions. The materials have been characterized by X-ray diffraction, and the particle size composition of the synthesized powders has been determined. Their electrical conductivity has been measured as a function of temperature. We have studied the key electrochemical characteristics of solid-contact ion-selective electrodes fabricated using the synthesized materials: linear range and slope of the principal electrode function, working pH range, and response time.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168518070142