NASA NTRS · 19880031826
Phase equilibria in the iron oxide-cobalt oxide-phosphorus oxide system
Abstract
Two novel ternary compounds are noted in the present study of 1000 C solid-state equilibria in the Fe-Co-P-O system's Fe2O3-FePO4-Co3(Po4)2-CoO region: CoFe(PO4)O, which undergoes incongruent melting at 1130 C, and Co3Fe4(PO4)6, whose incongruent melting occurs at 1080 C. The liquidus behavior-related consequences of rapidly solidified cobalt ferrite formation from cobalt ferrite-phosphate melts are discussed with a view to spinel formation. It is suggested that quenching from within the spinel-plus-liquid region may furnish an alternative to quenching a homogeneous melt.
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De Guire, Mark R., Prasanna, T. R. S., Kalonji, Gretchen, O'Handley, Robert C.. 1987-11-01. Phase equilibria in the iron oxide-cobalt oxide-phosphorus oxide system. https://ntrs.nasa.gov/citations/19880031826
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