Phase Transitions and Transport Properties of the Bismuth Vanadate-Based (Bi,La)_{4}(V,Zr)_{2}O_{11-z} Ceramics

• Authors: E. Politova , J. Torba , E. Fortalnova , G. Kaleva , M. Safronenko , N. Venskovskii
• Languages of publication: EN

Abstracts

EN

Ceramic solid solutions (Bi_{1-y}La_{y})_{4}(V_{1-x}Zr_{x})_{2}O_{11-z} with x = 0-0.05, y = 0-0.16 have been prepared by the solid state reaction method. The samples were studied by differential thermal analysis, X-ray diffraction, dielectric spectroscopy, and impedance methods. The concentration and temperature stabilization regions of the polymorphous α-, β-, γ'-, γ-modifications have been determined. The effects observed in dielectric properties, conductivity, and impedance data confirmed the influence both of intrinsic oxygen vacancies and those "pinned" at ferroelectric domain boundaries on the temperature hysteresis of α-β phase transition and their contribution to mechanism of oxygen ion transport.

Keywords

EN

64.60.-i; 72.20.-i; 77.22.Ch; 77.22.Gm

Discipline

• 77.22.Gm: Dielectric loss and relaxation
• 77.22.Ch: Permittivity (dielectric function)(for low-permittivity dielectric films, see 77.55.Bh; for high-permittivity gate dielectric films, 77.55.D-)
• 64.60.-i: General studies of phase transitions(see also 63.70.+h Statistical mechanics of lattice vibrations and displacive phase transitions; for critical phenomena in solid surfaces and interfaces, and in magnetism, see 68.35.Rh, and 75.40.-s, respectively)
• 72.20.-i: Conductivity phenomena in semiconductors and insulators(see also 66.70.-f Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 1
• Pages: 20-23

Dates

published

2010-01

Contributors

author

E. Politova

• Karpov Institute of Physical Chemistry, Vorontsovo Pole St., 10, 105064, Moscow, Russia

author

J. Torba

• Karpov Institute of Physical Chemistry, Vorontsovo Pole St., 10, 105064, Moscow, Russia

author

E. Fortalnova

• Karpov Institute of Physical Chemistry, Vorontsovo Pole St., 10, 105064, Moscow, Russia
• Peoples' Friendship University of Russia, Ordzhonikidze St., 3, 117198, Moscow, Russia

author

G. Kaleva

• Karpov Institute of Physical Chemistry, Vorontsovo Pole St., 10, 105064, Moscow, Russia

author

M. Safronenko

• Peoples' Friendship University of Russia, Ordzhonikidze St., 3, 117198, Moscow, Russia

author

N. Venskovskii

• Peoples' Friendship University of Russia, Ordzhonikidze St., 3, 117198, Moscow, Russia

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Identifiers

DOI

10.12693/APhysPolA.117.20