Phase Equilibria, Charge Transport, and Mass Transport in Sr4Nb2O9-{''}M4Nb2O9{''} (M = Cd, Cu, Ni, and Zn) Systems / Pantyukhina M. I.,Podkorytov A. L.,Zhukovskii V. M. // RUSSIAN JOURNAL OF INORGANIC CHEMISTRY. - 2010. - V. 55, l. 1. - P. 103-111.

ISSN/EISSN:

0036-0236 / нет данных

Type:

Article

Abstract:

Homogeneous fields of Sr-4 (-) xMxNb2O9 (M = Cd, Cu, Ni, or Zn) solid solutions were determined using powder X-ray diffraction. Phase fields were plotted proceeding from the tolerance factor t and electronegativity ratio (kappa) over bar (A)/(kappa) over bar (B) with a satisfactory fit of experimental results. Thermogravimetry was used to establish the major kinetic laws of solid-phase synthesis (conversion, rate-controlling stage, and effective activation energy) in (4 - x)SrCO3 + xMO + Nb2O5 powdery mixtures. Direct radiometry was used to determine Sr-90, Ni-63, and Zn-65 self-diffusion coefficients in solid solutions based on the Sr4Nb2O9 phase. Electrical conductivity was measured as a function of temperature for all Sr4Nb2O9-{''}M4Nb2O9{''} samples. The conductivity of Sr-4 (-) xMxNb2O9 (M = Cd, Cu, Ni, or Zn) solid solutions has a mixed ion-electron character.

Author keywords:

PEROVSKITE STRUCTURE; ELECTRICAL-CONDUCTIVITY; STRONTIUM NIOBATES; BARIUM NIOBATES; METAL NIOBATES; NONSTOICHIOMETRY; OXIDES

DOI:

10.1134/S0036023610010201

Web of Science ID:

ISI:000273812700020

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	PEROVSKITE STRUCTURE; ELECTRICAL-CONDUCTIVITY; STRONTIUM NIOBATES; BARIUM NIOBATES; METAL NIOBATES; NONSTOICHIOMETRY; OXIDES
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear
Author-Email	Pantyukhina@ihte.uran.ru
Number-of-Cited-References	29
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	8
Journal-ISO	Russ. J. Inorg. Chem.
Doc-Delivery-Number	546LQ