Preparation of Polymer Foam Magnesium Ferrite Nano-Materials by Polymerization Phenomena of Metal Ions in Aqueous Solution

摘要

In the present investigation, the polymer foam magnesium ferrite/hematite, MgFe2O4/α-Fe2O3 and magnesium ferrite (MgFe2O4) were prepared by using magnesium oxide (MgO) and ferric chloride (FeCl.r6H2O) as starting materials with assisted ultrasonic dispersing technology in the aqueous solution. FTIR, XRD, SEM and TG-DTG-DTA analysis indicated that the transformation of MgFe2O4/α-Fe2O3 to MgFe2O4 was obtained by adjusting the molar ratio of Mg/Fe selectively or the pH value of aqueous solution. The grain size and morphology of the resultant nano-crystalline were also strongly affected by the molar ratio of Mg/Fe selectively, the pH value of aqueous solution and the calcinations temperature. The forming mechanism of polymer foam MgFe2O4 can be explained according to the polymerization phenomena of metal ions in aqueous solution. In this study, not any additives or modifiers were used, which demonstrates the potential application of MgFe2O4 in various field.