Nature of the surface layer in ABO3-type perovskites at elevated temperatures

Autor:	J. Albers, M Pawelczyk, J. Kwapulinski, K. Szot, J. Hulliger, Rainer Waser, Jan Dec, Ch. Freiburg, J. Herion
Rok vydání:	1996
Předmět:	Diffraction Potassium niobate Materials science Inorganic chemistry General Chemistry Crystal structure Partial pressure chemistry.chemical_compound Crystallography chemistry Phase (matter) Strontium titanate General Materials Science Surface layer Oxygen pressure
Zdroj:	Applied Physics A Materials Science & Processing. 62:335-343
ISSN:	1432-0630 0947-8396
DOI:	10.1007/bf01594231
Popis:	X-ray diffraction measurements showed that in the surface layer of perovskite structure BaTiO3, SrTiO3, PbTiO3 and KNbO3 crystals at elevated temperatures (500–1000°C) reactions take place in the solid phase, associated with segregation in the direction to the surface of AO complexes, leading to the formation of a whole homologue series of crystalline compounds with the general formula AO · (ABO3) n ,n = l, 2,....., 10, ∞ Lowered oxygen partial pressure may inhibit the segregation processes and in the range of temperatures for which vaporisation of the AO complexes from the surface does not yet take place a suitable choice of oxygen pressure may lead to resynthesis of the compound.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2d2a7b849aa58a8d8eefb7623bb1ddf5 https://doi.org/10.1007/bf01594231 Zobrazit plný text záznamu Plný text ve formátu PDF