Oxygen Uptake and Release Mechanism of Lithium Manganese Ferrite in the Low Temperature Range of 573-773 K

Autor:	Nobuyuki Gokon, Masamichi Tsuji, Yutaka Tamaura, Taizo Sano, Hiroshi Kaneko
Rok vydání:	2004
Předmět:	Inorganic chemistry Oxygene chemistry.chemical_element Quaternary compound Atmospheric temperature range Oxygen Redox chemistry Mössbauer spectroscopy Materials Chemistry Ceramics and Composites Molecule Ferrite (magnet) computer computer.programming_language Nuclear chemistry
Zdroj:	ResearcherID Scopus-Elsevier
ISSN:	1551-2916 0002-7820
Popis:	Oxygen uptake and release of (Li,Mn) ferrite [LMF; (Li0.60Mn1.20Fe1.20)1−δO4; δ= 0.007 to 0.033] was investigated concerning the relations between redox reactions of ferrite and cation migration. Mossbauer spectroscopy and X-ray diffractometry showed that some of the Li+ and Fe3+ ions migrated from the A sites to the B sites of the spinel-type structure and Mn4+ ions migrated from the B sites to the A sites during oxygen uptake at 573 K. The cation-deficient LMF formed by the oxygen uptake released oxygen molecules in He gas only at 660 K. The cation migration during the oxygen release was in the opposite direction of the movement during oxygen uptake at 573 K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::272a2dc2e197d35e9de0220dc3d25cff https://doi.org/10.1111/j.1151-2916.2000.tb01583.x Zobrazit plný text záznamu Plný text