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Kinetics of Solid‐State Reaction of Bi 2 O 3 and Fe 2 O 3
Author(s) -
MUKHERJEE JAHAR L.,
WANG FRANKLIN F. Y.
Publication year - 1971
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.1151-2916.1971.tb12162.x
Subject(s) - stoichiometry , activation energy , kinetics , solid state , chemical kinetics , phase (matter) , solid solution , chemistry , materials science , diffraction , reaction rate constant , analytical chemistry (journal) , crystallography , metallurgy , physics , organic chemistry , chromatography , quantum mechanics , optics
Solid‐state reactions of equimolar mixtures of Bi 2 O 3 and Fe 2 O 3 from 625° to 830°C and their kinetics were investigated. The reaction rates were determined from the integrated X‐ray diffraction intensities of the strongest peaks of the reactants and products. The activation energy for the formation of BiFeO 3 was 96.6±9.0 kcal/mol; that for a second‐phase compound, Bi 2 Fe 4 O 9 , which formed above 675°C, was 99.4±9.0 kcal/mol. Specific rate constants for these simultaneous reactions were obtained. The preparation of single‐phase BiFeO 3 from the stoichiometric mixture of Bi 2 O 3 and Fe 2 O 3 is discussed.