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Phase Equilibrium Studies in the System Iron Oxide‐Al 2 O 3 ‐Cr 2 O 3
Author(s) -
MUAN ARNULF,
SÖMIYA SHIGEYUKI
Publication year - 1959
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.1151-2916.1959.tb13581.x
Subject(s) - corundum , spinel , monoclinic crystal system , solid solution , phase (matter) , thermodynamics , hexagonal crystal system , mineralogy , chemistry , oxide , partial pressure , analytical chemistry (journal) , materials science , crystal structure , crystallography , metallurgy , oxygen , chromatography , organic chemistry , physics
Subsolidus phase relations in the system iron oride‐Al 2 O 2 ‐Cr 2 O 3 in air and at 1 atm. O 2 pressure have been studied in the. temperature interval 1250° to 1500°C. At temperatures below 1318° C. only sesquioxides with hexagonal corundum structure are present as equilibrium phases. In the temperature interval 1318° to 1410°C. in air and 1318° to 1495° C. at 1 atm. O 2 , pressure the monoclinic phase Fe 2 O 3 . Al 2 O 3 with some Cr 2 O 3 in solid solution is present in the phase assemblage of certain mixtures. At temperatures above 1380°C. in air and above 1445°C. at 1 atm. O 2 pressure a complex spinel solid solution is one of the phases present in appropriate composition areas of the system. X‐ray data relating d‐ spacing to composition of solid solution phases are given.