On the dehydration of mixed oxides powders coprecipitated from aqueous solutions

摘要

Concerning the generation of manganese ferrite by coprecipitation from MnO_2 and FeSO_47H_2O aqueous solution, based on TG, DTG and DTA measurements, IR and mass spectra, SEM and X-ray diffraction data, the authors present an investigation on the elimination of water from the non-aged, aged and air-calcined coprecipitates. Some powders microstructure changes generated by water release through aging in solution or heating in air are presented.