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Reaction Mechanisms of Strontium Ferrites Synthesis
Author(s) -
Saleh Hesham Ibrahim
Publication year - 2002
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200200053
Subject(s) - chemistry , strontium , molar ratio , reaction mechanism , reaction conditions , chemical reaction , infrared spectroscopy , inorganic chemistry , infrared , nuclear chemistry , catalysis , organic chemistry , physics , optics
The reactions between strontium and iron nitrates have been studied in an open atmosphere system using three different molar ratios, 1:1 (I), 1:2 (II) and 2:1 (III) at different temperatures as pointed out from the DTA data. The reaction mechanism was discussed based on the chemical composition characterized by means of thermal analysis, X‐ray diffraction patterns, infrared spectra and magnetic susceptibility. It was found that the reaction products depend on both temperature of reaction and the ratio between reactants. The reaction products were found to be composed of a variety of iron compounds that possess different valences: SrFeO 2.86 , SrFeO 2.97 , SrFe 2 O 4 , SrFe 12 O 19 , Sr 2 Fe 2 O 5 and Sr 7 Fe 10 O 22 in addition to some accessory reaction products namely α‐Fe 2 O 3 and FeO(OH).