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The System Iron Oxide‐TiO 2 ‐SiO 2 in Air
Author(s) -
MacCHESNEY J. B.,
MUAN ARNULF
Publication year - 1960
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1960.tb13621.x
Subject(s) - liquidus , cristobalite , oxide , mineralogy , materials science , hematite , eutectic system , isobaric process , magnetite , rutile , iron oxide , phase diagram , crystallization , ilmenite , ternary numeral system , nepheline , ternary operation , analytical chemistry (journal) , phase (matter) , thermodynamics , chemistry , metallurgy , alloy , quartz , physics , organic chemistry , computer science , programming language , chromatography
Phase relations at liquidus temperatures in the system iron oxide‐TiO 2 ‐SiO 2 have been determined in air. The equilibrium existence of the crystalline phases magnetite (ss), hematite (ss), pseudobrookite(ss), rutile(ss), and silica (tridy‐mite or cristobalite) has been established. Three isobaric eutectic points are formed by the intersections of quaternary liquidus univariant lines of the system Fe‐Ti‐Si‐O and the 0.21 atmosphere isobaric surface. The liquid misci‐bility gaps present in the bounding “binary” systems iron oxide‐Si0 2 and TiO 2 ‐SiO 2 extend across the composition triangle representing the “ternary” system iron oxide‐TiO 2 ‐SiO 2 . Liquidus temperatures decrease within the two‐liquid region from approximately l <57Q a C. in the system iron oxide‐SiO 2 and 1780°C. in the system Ti(VSiO 2 to 1540°C. at the cristobalite‐rutile(ss) boundary curve which bisects the two‐liquid region. Paths of equilibrium crystallization of representative mixtures are discussed with reference to a simplified projection into the plane FeOFe 2 O 3 ‐TiO 2 ‐SiO 2 as well as in terms of the tetrahedron representing the system FeO‐Fe 2 O 3 ‐TiO 2 ‐SiO 2 .