INVESTIGADORES
CANEIRO Alberto
artículos
Título:
Microstructural variations as a function of δ in La2−xSrxNiO4+δ
Autor/es:
M.J. SAYAGUEZ; A. CANEIRO; J.M. GONZALEZ CALBET; M. VALLET-REGI
Revista:
JOURNAL OF MATERIALS RESEARCH
Editorial:
MATERIALS RESEARCH SOC
Referencias:
Año: 1994 vol. 9 p. 1263 - 1271
ISSN:
0884-2914
Resumen:
A
microstructural characterization of the La2−xSrxNiO4+δ (0 ⋚ x ⋚ 1) system,
prepared with accurate control of the oxygen content, has been performed. The
electron diffraction study shows the evolution of the accommodation of
compositional variations as a function of δ. For δ > 0.06, interstitial oxygens are
ordered, leading to new K2NiF4 superstructural types.
Samples with δ < 0.06
accommodate the nonstoichiometry by means of random distribution of anionic
vacancies.