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Kinetics of Solid‐State Reaction of BaO 2 and α‐Fe 2 O 3
Author(s) -
Watanabe Koichi
Publication year - 1998
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.1151-2916.1998.tb02400.x
Subject(s) - activation energy , isothermal process , kinetics , rate equation , reaction rate constant , volume fraction , analytical chemistry (journal) , volume (thermodynamics) , chemical kinetics , chemistry , materials science , thermodynamics , physics , chromatography , quantum mechanics
The reaction kinetics of an equimolar mixture of BaO 2 and alpha‐Fe 2 O 3 were investigated in an ambient atmosphere under isothermal conditions. The volume fraction of products was determined using the integrated X‐ray diffraction intensities of the most prominent peaks, and the rate constants of the reaction were calculated with the Jander equation. The apparent activation energy for the formation of BaFeO 3‐ x ( x = 0.02‐0.08) was 82 ± 6 kJmol −1 , and that for the formation of BaFe 2 O 4 was 82 ± 7 kJmol −1 .