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Preliminary Observations on Phase Relations in the “V 2 O 3 –FeO” and V 2 O 3 –TiO 2 Systems from 1400°C to 1600°C in Reducing Atmospheres
Author(s) -
Coetsee Theresa,
Pistorius Chris
Publication year - 2000
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.1151-2916.2000.tb01414.x
Subject(s) - spectroscopy , analytical chemistry (journal) , phase (matter) , solid solution , x ray spectroscopy , crystallography , electron microprobe , chemistry , materials science , mineralogy , physics , organic chemistry , chromatography , quantum mechanics
Phase relations within the “V 2 O 3 –FeO” and V 2 O 3 –TiO 2 oxide systems were determined using the quench technique. Experimental conditions were as follows: partial oxygen pressures of 3.02 × 10 −10 , 2.99 × 10 −9 , and 2.31 × 10 −8 atm at 1400°, 1500°, and 1600°C, respectively. Analysis techniques that were used to determine the phase relations within the reacted samples included X‐ray diffractometry, electron probe microanalysis (energy‐dispersive spectroscopy and wavelength‐dispersive spectroscopy), and optical microscopy. The solid‐solution phases M 2 O 3 , M 3 O 5 , and higher Magneli phases (M n O 2 n −1 , where M = V, Ti) were identified in the V 2 O 3 –TiO 2 system. In the “V 2 O 3 –FeO” system, the solid‐solution phases M 2 O 3 and M 3 O 4 (where M = V, Ti), as well as liquid, were identified.