Published May 2003 | Version v1
Journal article Metadata-only

Formation kinetics of the Ruddlesden-Popper phases. Communication III. Mechanism of Gd2SrAl2O7 formation

Creators

  • 1. Sankt-Peterburgskij Gosudarstvennyj Univ., Sankt-Peterburg (Russian Federation)
  • 2. RAN, Inst. Khimii Silikatov im. I.V. Grebenshchikova, Sankt-Peterburg (Russian Federation)

Description

Kinetics of phase formation in the system Gd2O3-SrO-Al2O3 was studied by the method of isothermal annealing-quenching in the temperature range of 900-1530 deg C, involving X-ray phase analysis and electronic microscopy. It was ascertained that synthesis of Gd2SrAl2O7 occurs according to a mechanism different from the mechanism of formation of Ln2SrAl2O7 oxides (Ln = La, Nd, Sm), as the intermediate oxide GdAlO3 proved unstable at the synthesis temperature. Interaction between Gd2O3 and SrAl2O4 is the limiting stage of the synthesis

Abstract (Russian)

Методом изотермического отжига-закалки в интервале температур 900-1530 град С с привлечением рентгенофазового анализа и электронной микроскопии изучена кинетика фазообразования в системе Gd2O3-SrO-Al2O3. Установлено, что синтез Gd2SrAl2O7 протекает по механизму, отличному от механизма формирования оксидов Ln2SrAl2O7 (Ln = La, Nd, Sm) вследствие того, что промежуточный оксид GdAlO3 при температуре синтеза неустойчив. Лимитирующей стадией синтеза является взаимодействие между Gd2O3 и SrAl2O4

Additional details

Additional titles

Original title (Russian)
Кинетика образования фаз Руддлесдена-Поппера. III. Механизм формирования Гд

Publishing Information

Journal Title
Zhurnal Obshchej Khimii
Journal Volume
73
Journal Issue
5
Journal Page Range
p. 724-728
ISSN
0044-460X
CODEN
ZOKHA4

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
35090317
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ALUMINIUM OXIDES; CHEMICAL COMPOSITION; CHEMICAL PREPARATION; CHEMICAL REACTION KINETICS; GADOLINIUM OXIDES; PHASE STUDIES; REACTION INTERMEDIATES; SCANNING ELECTRON MICROSCOPY; STRONTIUM OXIDES; TEMPERATURE RANGE 1000-4000 K; X-RAY DIFFRACTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; ELECTRON MICROSCOPY; GADOLINIUM COMPOUNDS; KINETICS; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; REACTION KINETICS; SCATTERING; STRONTIUM COMPOUNDS; SYNTHESIS; TEMPERATURE RANGE

Optional Information

Notes
10 refs., 4 figs., 2 tabs.