Vibrational and electronic spectroscopic properties of zirconia powders

Autor:	Marta Panizza, Vicente Sanchez Escribano, Enrique Fernández López, Guido Busca, Maria Maddalena Carnasciali
Rok vydání:	2001
Předmět:	Zirconium Materials science Infrared spectroscopy chemistry.chemical_element General Chemistry Electron spectroscopy Crystallography symbols.namesake Tetragonal crystal system chemistry Materials Chemistry symbols Cubic zirconia Raman spectroscopy Monoclinic crystal system Perovskite (structure)
Zdroj:	Journal of Materials Chemistry. 11:1891-1897
ISSN:	1364-5501 0959-9428
DOI:	10.1039/b100909p
Popis:	Ten zirconia powders have been characterized by XRD, FT-IR/FT-FIR and Raman skeletal spectroscopies and DR-UV electronic spectroscopy. The vibrational features of a yttria-stabilized cubic zirconia and of tetragonal, monoclinic and tetragonal + monoclinic pure zirconia mixtures have been discussed. Assignments for the vibrational features of cubic and tetragonal samples are proposed. The origin of very broad vibrational peaks in tetragonal zirconia is briefly addressed. The vibrational spectra provide evidence for the presence of trigonal oxide ions in the monoclinic phase only. The UV spectra show that monoclinic zirconia (where the coordination of zirconium is sevenfold) absorbs at lower energy than the cubic and tetragonal phases (where the coordination of zirconium is eightfold). However, it absorbs at higher energy than the perovskite SrZrO3 where Zr adopts octahedral coordination. The origin of the shifts of the corresponding absorption edges is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82235001b0706f237a4fd93d63a24650 https://doi.org/10.1039/b100909p Zobrazit plný text záznamu