Synthesis and Electrical Properties of a Fluorite-Like Nd{sub 5}Mo{sub 3}O{sub 16} Compound with Partial Substitution of Molybdenum by Tungsten, Niobium, or Vanadium

Journal Article · Mon Jan 15 04:00:00 EST 2018 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774518010212· OSTI ID:22758273

Kharitonova, E. P.; Orlova, E. I. ^[1]

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1. Moscow State University (Russian Federation)

The phase formation of Nd{sub 5}Mo{sub 3–x}W{sub x}O{sub 16.5}, Nd{sub 5}Mo{sub 3–x}Nb{sub x}O{sub 16.5–х/2}, and Nd{sub 5}Mo{sub 3–x}V{sub x}O{sub 16.5–х/2} solid solutions based on a fluorite-like Nd{sub 5}Mo{sub 3}O{sub 16.5} compound (mixed conductor with interstitial oxygen conductivity) has been studied. The electrical conductivity of doped compounds obeys the Arrhenius law and, at a low impurity content, is as high as 0.03–0.08 S/cm at 800°C. Substitution of Mo{sup 6+} cations by V{sup 5+} and Nb{sup 5+} cations reduces the interstitial oxygen content, which causes a decrease in the solid-solution electrical conductivity by 1–2 orders of magnitude and a decrease in the cubic unit-cell parameter. A wide diffuse anomaly with a maximum of about 1500–4000 has been observed in the temperature dependence of the permittivity for all single-crystal and polycrystalline samples in the range of 300–900°C.

• OSTI ID: 22758273
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 1 Vol. 63; ISSN 1063-7745; ISSN CYSTE3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATIONS
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
FLUORITE
MOLYBDENUM
MOLYBDENUM IONS
MONOCRYSTALS
NIOBIUM
NIOBIUM IONS
OXYGEN
PERMITTIVITY
POLYCRYSTALS
SOLID SOLUTIONS
SYNTHESIS
TEMPERATURE DEPENDENCE
TUNGSTEN
VANADIUM
VANADIUM IONS