Published June 2005 | Version v1
Journal article Metadata-only

Ferroelectric solid solutions in the Ca3(VO4)2-BiVO4 system

Creators

  • 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Khimicheskij Fakul'tet, Moscow (Russian Federation)
  • 2. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Fakul'tet Nauk o Materialakh, Moscow (Russian Federation)
  • 3. UrO RAN, Inst. Khimii Tverdogo Tela, Ekaterinburg (Russian Federation)

Description

The existence of a Ca3(VO4)2-based Ca21-1.5xBix(VO4)14 (0 ≤ x < 2.52) solid solution in the Ca3(VO4)2 - BiVO4 system is shown. A second-order ferroelectric phase transition in the solid solution is discovered. As the bismuth concentration increases, the phase transition temperature is depressed from 1383 K (for x = 0) to 1003 K (x = 2.52) and the ionic conductivity decreases. The maximal second harmonic generation signal is observed for the x = 2 composition. The structure is solved for the x 0.66, 1.66, 2, and 2.52 phases using the Rietveld technique

Abstract (Russian)

В системе Са3(VO4)2-ВiOV4 установлено существование области твердых растворов Ca21-1.5xBix(VO4)14 (0 ≤ х < 2.52), построенных на основе Ca3(VO4)2. В твердых растворах обнаружен высокотемпературный сегнетоэлектрический фазовый переход второго рода. С увеличением содержания висмута уменьшаются температура фазового перехода с 1383 (х = 0) до 1003 К (х = 2.52) и величина ионной проводимости. Максимальная величина сигнала генерации второй гармоники наблюдается для состава с х = 2. Методом Ритвельда определено строение фаз с х = 0.66, 1.66, 2, 2.52

Additional details

Additional titles

Original title (Russian)
Сегнетоэлектрические твердые растворы в системе Са

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
50
Journal Issue
6
Journal Page Range
p. 901-911
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
36100240
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHEMICAL COMPOSITION; CRYSTAL LATTICES; IONIC CONDUCTIVITY; LATTICE PARAMETERS; OPTICAL PROPERTIES; PERMITTIVITY; PHASE TRANSFORMATIONS; SOLID SOLUTIONS; TRANSITION TEMPERATURE; VANADATES; X-RAY DIFFRACTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; COHERENT SCATTERING; CRYSTAL STRUCTURE; DIELECTRIC PROPERTIES; DIFFRACTION; DISPERSIONS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; HOMOGENEOUS MIXTURES; MIXTURES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; SOLUTIONS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; VANADIUM COMPOUNDS

Optional Information

Notes
21 refs., 8 figs., 5 tabs.